WO2007125988A1 - 新規アミロイド親和性化合物 - Google Patents
新規アミロイド親和性化合物 Download PDFInfo
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- WO2007125988A1 WO2007125988A1 PCT/JP2007/059048 JP2007059048W WO2007125988A1 WO 2007125988 A1 WO2007125988 A1 WO 2007125988A1 JP 2007059048 W JP2007059048 W JP 2007059048W WO 2007125988 A1 WO2007125988 A1 WO 2007125988A1
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- hydroxyphenol
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
- C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
- C07D487/04—Ortho-condensed systems
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
- A61K51/04—Organic compounds
- A61K51/041—Heterocyclic compounds
- A61K51/044—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
- A61K51/0455—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
- A61K51/04—Organic compounds
- A61K51/041—Heterocyclic compounds
- A61K51/044—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins
- A61K51/0459—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine, rifamycins having six-membered rings with two nitrogen atoms as the only ring hetero atoms, e.g. piperazine
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/22—Tin compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/22—Tin compounds
- C07F7/2208—Compounds having tin linked only to carbon, hydrogen and/or halogen
Definitions
- the present invention relates to a compound used for diagnosis of head degenerative diseases. More specifically, the present invention relates to a compound useful for detection of amyloid at a lesion site in the diagnosis of diseases in which amyloid accumulates such as Alzheimer's disease.
- amyloidosis Diseases that develop when fibrous proteins called amyloid are deposited in various organs or tissues in the body are collectively called amyloidosis.
- a common feature of amyloidosis is that fibrillar protein called amyloid rich in ⁇ -sheet structure is deposited in various organs or regions throughout the body, causing functional abnormalities in the organs and tissues.
- AD Alzheimer's disease
- AD which is a typical disease of amyloidosis
- AD is known as a disease causing dementia. Since this disease is a disease in which amyloid gradually deposits in the brain and causes death, it can be said that this disease has a higher social interest than other amyloidosis.
- AD patients In recent years, in advanced countries, the number of AD patients has increased rapidly with the aging of society, which has become a social problem.
- AD is characterized by three brain pathological findings: the appearance of senile plaques, neurofibrillary tangles, and extensive neuronal loss.
- Senile plaques are structures that contain amyloid as the main component, and are considered to be pathological findings in the brain that appear more than 10 years before the onset of AD, that is, clinical symptoms.
- Diagnosis of AD is carried out by performing various cognitive function evaluations (for example, Hasegawa scale, ADAS-JCog, MMSE, etc.) after supplementarily combining image diagnosis such as CT and MRI.
- various cognitive function evaluations for example, Hasegawa scale, ADAS-JCog, MMSE, etc.
- image diagnosis such as CT and MRI.
- amyloid composing senile plaques is an aggregate of amyloid j8 protein (hereinafter referred to as A
- 8 amyloid j8 protein
- Many studies have reported cell toxicity. Based on these findings, V, the so-called “amyloid cascade hypothesis” was proposed, in which A
- TZDM 6--2- [4 '-(N, N-dimethylamino) phenol] benzothiazole
- 6-hydroxy-2- [4,1- (N-methylamino) phenol 6-hydroxy-2- [4,1- (N-methylamino) phenol.
- Various thioflavine derivatives including benzothiazole (hereinafter referred to as 6-OH-BTA 1) (Patent Document 1, Non-Patent Document 3), (E) -4-methylamino-1,4-hydroxystilbene (hereinafter referred to as SB) -13) and (E) -4 dimethylamino 4,-odostilbene (hereinafter referred to as m-I-SB) (Patent Document 2, Non-Patent Document 4, Non-Patent Document 5) 6 6- [4 '(N, N-dimethylamino) phenol] benzoxazole (hereinafter referred to as IBOX), 6— [2— (Fluoro) ethoxy] —2— [2— (2 Dimethyl Aminothiazole-5-yl) etul] Benzoxazole and other Ben Oxazole derivatives (Non-patent document 6, Non-patent document 7), 2- (1— ⁇ 6— [(2 Fluoroethyl
- Patent Document 1 Japanese Translation of Special Publication 2004—506723
- Patent Document 2 Japanese Translation of Special Publication 2005-504055
- Patent Document 3 Special Table 2005-512945
- Patent Document 4 Japanese Translation of Special Publication 2002-523383
- Non-Patent Document 2 G. McKhann et al., Clinical diagnosis of Alzheimer's disease: Report of the NINCDS— ADRDA Work Group under the auspices of Department of Health and Human Services Task Force on Alzheimer's Disease. ", Neurology , 1984, 34, p.9 39-944
- Non-Patent Document 3 Z.- P. Zhuang et al., "Radioiodinated Styrylbenzenes and Thioflavins as Probes for Amyloid Aggregates.”, J. Med. Chem., 2001, 44, p.1905- 1914
- Non-Patent Document 4 Masahiro Ono et al., "11C-labeled stilbene derivatives as A ⁇ -aggre gate-specific PET imaging agents for Alzheimer's disease.”, Nuclear Medicine and Biology, 2003, 30, p.565-571
- Non-Patent Document 5 H. F. Kung et al., "Novel Stnbenes as Probes for amyloid plaques.”, J. American Chemical Society, 2001, 123, p.12740—12741
- Non-Patent Document 6 Zhi- Ping Zhuang et al., "IBOX (2- (4, -dimethylaminophenyl) -6-iodob ensoxazole): a ligand for imaging amyloid plaques in the brain., Nuclear Medicine a nd Biology, 2001, 28, p.887-894
- Non-Patent Document 7 Furumoto Y et al., "[11C] BF-227: A New 11C- Labeled 2- Ethenylbe nzoxazole Derivative for Amyloid- ⁇ Plaques Imaging., European Journal of Nuclear Medicine and Molecular Imaging, 2005, 32 , Sup. L, P759
- Non-Patent Document 8 Eric D. Agdeppa et al., "2- Dialkylamino- 6- Acylmalononitrile Substitu ted Naphthalenes (DDNP Analogs): Novel Diagnostic and Therapeutic Tools in Alzh eimer 's Disease.”, Molecular Imaging and Biology, 2003, 5, p.404- 417
- Non-Patent Document 9 Zhi— Ping Zhuang et al., "Structure-Activity Relationship of Imidazo [l , 2- a] pyridines as Ligands for Detecting ⁇ -Amyloid Plaques in the Brain. ", J. Med. Chem, 2003, 46, p.237-243
- Non-Patent Document 10 W. E. Klunk et al., “Imaging brain amyloid in Alzheumer's disease w ith Pittsburgh Compound— B.,, Ann. Neurol, 2004, 55, p.306—319
- Non-Patent Document 11 Nicolaas P. L. G. Verhoeff et al., "In- Vivo Imaging of Alzheimer Dis ease ⁇ -Amyloid With [11C] SB- 13 PET., American Journal of Geriatric Psychiatry, 2004, 12, p.584-595
- IMPY imidazopyridine skeleton
- compounds having an imidazopyridine skeleton have properties when transferred into the brain after administration and accumulate in amyloid, and unlike normal compounds described above, It has been shown that it has excellent properties such as fast clearance of [ 12 3 ⁇ 4 labeling compound as a result of experiments.
- IMPY is a compound that shows a positive result in a reverse mutation test, and in order to use this compound as an imaging diagnostic probe, it is necessary to pay sufficient attention to its dosage and dosage form.
- FDDNP has also been reported to be positive in the reverse mutation test. (International Publication No. 03Z106439 Pamphlet)
- the present invention has been made in view of the above circumstances, has affinity for amyloid, sufficiently clears the clearance from normal tissue, and suppresses toxicity such as mutagenicity.
- the purpose was to obtain a compound and a diagnostic agent for Aruno and Imah's disease.
- the inventor has found that a compound group satisfying the above conditions can be obtained by using a compound in which a hydroxyl group is bonded to carbon of an imidazopyridine phenyl skeleton, and has completed the present invention. This.
- a salt thereof, and a low toxicity Alzheimer's disease diagnostic agent comprising the compound represented by the formula (1) or a salt thereof.
- R 3 is a formula
- R 1 is a radioactive halogen substituent
- m is an integer from 0 to 4
- n is 0 or 1.
- various elements can be used, preferably a halogen selected from the group consisting of 18 F, 76 Br, 123 I, 124 I, 125 I and 131 I force, more preferably 18 F, 123 1 and 125 Halogens selected from the group of 1 force can be used.
- a ⁇ A 2 , A 3 and A 4 are each independently carbon or nitrogen, but at least one of them needs to be carbon. It is preferred that three or more of A ⁇ A 2 , A 3 and A 4 are carbon. More preferably, all are carbon.
- R 3 is any combination of AA 2 , A 3 and A 4 which are carbon. Each of A ⁇ A 2 , A 3 and A 4 is such that when R 3 is bonded to carbon, the hydrogen atom bonded to it is substituted.
- the hydroxyl group represented by the formula (1) may be bonded to any carbon constituting the phenyl skeleton, but may be bonded to four carbons of the file skeleton. Is preferred ⁇ .
- the binding site of R 3 is not particularly limited as long as it is AA 2 , A 3 or A 4 which is carbon, but is preferably A 3 which is carbon, that is, the 6-position carbon.
- R 4 is a formula
- n is an integer from 0 to 4
- n is 0 or 1
- halogen that can be a target in a nucleophilic substitution reaction using radioactive fluorine or a halogen that can be a target of an isotope exchange reaction with radioactive iodine can be used, preferably iodine. Bromine or chlorine can be used.
- Various substituents can be used as the trialkylstar substituent, and a trimethylstannyl substituent and a tryptylstar substituent can be preferably used.
- a 5 , A 6 , A 7 and A 8 are each independently carbon or nitrogen, but at least one of them must be carbon. It is preferred that three or more of A 5 , A 6 , A 7 and A 8 are carbon. More preferably, all are carbon.
- R 4 is bonded to any one of A 5 , A 6 , A 7 and A 8 which are carbon. Each of A 5 , A 6 , A 7 and A 8 is such that when R 4 is bonded to carbon, the hydrogen atom bonded to it is substituted.
- the hydroxyl group represented by the formula (2) may be bonded to any carbon constituting the phenyl skeleton, but may be bonded to four carbons of the file skeleton. Is preferred ⁇ .
- the binding site of R 4 is not particularly limited as long as it is A 5 , A 6 , A 7 or A 8 which is carbon, but is preferably A 7 which is carbon, that is, the 6-position carbon.
- a compound and a low-toxicity Alzheimer's disease diagnostic agent having affinity for amyloid, sufficiently high clearance from normal tissues, and suppressed toxicity such as mutagenicity. Can be obtained.
- the amount of solvent used is sufficient if it is sufficient for the reaction. However, if it is too much, it is not possible to obtain a precipitate of the reactant, so care must be taken. For example, when the reaction is carried out using 2 bromo-4, -hydroxyacetophenone equivalent to 10 mmol, about 40-50 mL of solvent may be used.
- the reaction solution is filtered to separate the precipitate, and then the white precipitate is suspended in a methanol Z water mixture (1: 1), and a saturated aqueous sodium hydrogen carbonate solution is added to the precipitate. If the amount is excessive, 6 bromo 2- (4,1-hydroxyphenol) imidazo [1,2-a] pyridine is liberated and precipitation occurs. By filtering this newly formed precipitate, 6-bromo 2- (4,1hydroxyphenol) imidazo [1,2-a] pyridine, which is the object of this step, can be obtained. ( Figure 1, step 2).
- the amount of the methanol / water mixture is not particularly limited as long as it is sufficient for the reaction. However, if the amount is too large, precipitation of the product will be hindered.
- the amount of sodium bicarbonate is in a large excess with respect to the precipitate as the reaction substrate. For example, if the reaction is performed under the above conditions, about 25 mL of a saturated aqueous solution of sodium bicarbonate may be added to the reaction solution.
- the amount of bistributinoresin is not limited as long as it satisfies the condition that it is in excess with respect to the reaction substrate.
- the reaction substrate is 6 bromo-1- (4, 1-hydroxyphenol) imidazo. It may be about 1.5 times as much as the molar ratio to [1, 2—a] pyridine.
- the compound obtained in Step 2 can be used as it is for a compound whose halogen substituent is bromine.
- the halogen substituent at position 6 is fluorine, chlorine and iodine
- step 2 instead of 2-amino-5-bromopyridine, 2-amino-5-fluoropyridine, 2-amino-5-chloropyridine and 2-amino-5-iodopyridine
- 2-amino-5-bromopyridine 2-amino-5-fluoropyridine, 2-amino-5-chloropyridine
- 2-amino-5-iodopyridine instead of 2-amino-5-bromopyridine, 2-amino-5-fluoropyridine, 2-amino-5-chloropyridine and 2-amino-5-iodopyridine
- the same reaction as in step 2 may be performed.
- step 2 To obtain a compound having a substituent bonded to the 6-position through an oxygen atom, in step 2,
- 2-amino (4-hydroxyphenol) 6-hydroxyimidazo [1,2-a] pyridine was synthesized by reacting 2-amino-5-hydroxypyridine instead of -amino-5-bromopyridine, and in the presence of a base, A bromide of a substituent to be introduced may be reacted.
- 2-amino-4-hydroxyphenol) 6-hydroxyimidazo [1,2-a] pyridine was synthesized by reacting 2-amino-5-hydroxypyridine instead of -amino-5-bromopyridine, and in the presence of a base, A bromide of a substituent to be introduced may be reacted.
- 2-amino-4-hydroxyphenol) 6-hydroxyimidazo [1,2-a] pyridine was synthesized by reacting 2-amino-5-hydroxypyridine instead of -amino-5-bromopyridine, and in the presence of a base, A bromide of a substituent to be introduced may be reacted.
- the formula (1) in AA 2, A 3 and I ⁇ prepared by the A 1 and the nitrogen of A 4, and, A 5 out of A 5, A 6, A 7 and A 8 in the above formula (2) 1 can be produced according to the above method except that 2-amino-5-bromopyrimidine is used instead of 2-amino-5-bromopyridine in step 2 of FIG. .
- radiohalogen label according to another aspect of the present invention will be described by taking 2— [4, monohydroxyphenol] — 6— [ 123 1] pseudoimidazo [1, 2—a] pyridine as an example.
- the method for producing the compound will be described.
- a labeling precursor 6 Toribuchirusuta - Lou 2- [4,-hydroxy Hue - le] Imida zone [1, 2-a] were dissolved pyridine in an inert organic solvent, the [1231] iodide Sodium fluoride solution, Is reacted by addition of acid and oxidizing agent, the desired product 2- [4,-hydroxy Hue - le] obtained over 6- [123 1] Yodoimidazo [1, 2-a] pyridine.
- the inert organic solvent for dissolving the precursor various solvents having no reactivity between the labeling precursor and [ 1231 ] sodium iodide can be used, and preferably methanol can be used. .
- hydrochloric acid can be preferably used.
- the oxidizing agent is not particularly limited as long as it can acidify iodine in the reaction solution, and hydrogen peroxide or peracetic acid can be preferably used.
- the addition amount of the oxidizing agent may be an amount sufficient to oxidize iodine in the reaction solution.
- a radiohalogen-labeled substance other than iodine can be synthesized by labeling a labeling precursor according to the purpose of synthesis with a radiohalogen according to the purpose.
- a labeling precursor for example, when synthesizing 6- [ 18 F] fluoropropoxy 2- (4, monohydroxyphenol) imidazo [1,2-a] pyridine, the labeling precursor 2- (4, -hydroxyphenol- ) -6- (3,1-para-toluenesulfonyloxypropoxy) imidazo [1, 2-a] pyridine is reacted with [ 18 F] fluoride ion in the presence of phase transfer catalyst and potassium carbonate good.
- the diagnostic agent according to the present invention is water or physiological saline or Ringer's solution in which the radiohalogen-labeled compound according to the present invention is adjusted to an appropriate pH as required. It can be prepared as a liquid blended with the above. In this case, the concentration of the present compound must be less than the concentration at which the stability of the blended present compound is obtained.
- the dose of the compound is not particularly limited as long as it is an amount sufficient to image the distribution of the administered drug. For example, in the case of iodine-123 labeled compound and fluorine-18-labeled compound, about 50 to 600 MBq per adult with a body weight of 60 kg can be administered intravenously or locally.
- the distribution of the administered drug can be imaged by a known method.
- a known method for example, in the case of iodine-123 labeled compound, a SPECT device, and in the case of fluorine-18-labeled compound, PET. Images can be displayed using the device.
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- UV-visible spectrophotometer detection wavelength: 282 nm
- radiation detector model: STEFFI type, manufactured by raytest
- a solution obtained by adding 10 mL of water to the fraction was mixed with a reverse phase column (trade name: Sep-Pak (registered trademark, Waters' Investment Ltd.) Light C18 Cartridges, Waters, packed with packing material.
- ( 125 : 1) -2- (4, -hydroxyphenol) -6-phoidimidazo [1,2-a] pyridine was adsorbed and collected on the column.
- the column was washed with 1 mL of water, and then 1 mL of ethanol was passed through to elute [ 125 1] -2- (4, 1-hydroxyphenol) 6-idoimidazo [1, 2-a] pyridine.
- the amount of radioactivity obtained was 37.5 MBq immediately after synthesis. When measured by TLC analysis under the following conditions, the radiochemical purity was 96.5%.
- Detector Bioimaging analyzer, BAS-2500 (Type: BAS-2500, Fuji Photo Film Co., Ltd.)
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- Example 1-7 (3, monofluoropropoxy) -2- (4, hydroxyhydroxy) imidazo
- NMR apparatus used JNM—GSX—270 (manufactured by JEOL Ltd.)
- N MR measurement results (internal standard substance: dimethyl sulfoxide) of the obtained 6-bromo-2- (4-hydroxyphenol) imidazo [1,2-a] pyrimidine were as follows.
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- N MR measurement results (internal standard substance: dimethyl sulfoxide) of the obtained 6-fluoro-2- (4, -hydroxyphenol) imidazo [1,2a] pyridine were as follows.
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- Cupric bromide 40 Og (equivalent to 179 mmol) was suspended in 70 mL of ethyl acetate. A solution prepared by dissolving 11.6 g (corresponding to 85.3 mmol) of 4,1hydroxyacetophenone in a mixed solution of 70 mL of ethyl acetate and 70 mL of chloroform was added and heated to reflux. 5. After 5 hours, the reaction mixture was cooled to room temperature and filtered, and the filtrate was concentrated under reduced pressure. The residue was dissolved in ethyl acetate and decolorized by adding activated carbon, and then the solution was filtered and concentrated.
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- the obtained crude crystals were suspended in a mixture of 10 mL of water and 15 mL of methanol, about 10 mL of a saturated sodium bicarbonate solution was added thereto, and the mixture was shaken for 5 minutes with an ultrasonic cleaner. The precipitate was filtered off from the resulting mixture, washed well with water, and dried under reduced pressure. The obtained solid was recrystallized from DMF to obtain 6-bromo-2- (4, monohydroxyphenol) imidazo [1,2-a] pyrimidine (289 mg, equivalent to l. 00 mmol) (Fig. 10, Step 2).
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- Cuprous bromide 28.17g (equivalent to 126mmol) was suspended in 50mL of ethyl acetate.
- a mixture of 4.18 g (corresponding to 60. Ommol) of 4,1-hydroxyacetophenone in 50 mL of ethyl acetate 50 mL chloroform was prepared and heated to reflux. After 5 hours, the reaction solution was cooled to room temperature and filtered, and the filtrate was concentrated under reduced pressure. The residue was dissolved in ethyl acetate, decolorized by adding activated carbon, and then the solution was filtered and concentrated.
- NMR apparatus used JNM— ECP— 500 (manufactured by JEOL Ltd.)
- the column was washed with 1 mL of water, and then passed through lm L of jetyl ether to elute [2- (4, -hydroxyphenol) -6 pseudoimidazo [1,2-a] pyrimidine.
- the amount of radioactivity obtained was 67 MBq immediately after synthesis.
- TLC analysis was conducted under the following conditions, the radiochemical purity was 92.5%. It was.
- TLC plate TLC plate: Silica Gel 60 F (Product name, Merck)
- a solution obtained by adding 10 mL of water to the relevant fraction was mixed with a reversed-phase column (trade name: Sep-Pak (registered trademark, Waters' Investment Ltd.) Light C18 Cartridges, Waters, packed with packing material.
- the amount of the solution was passed through a column (130 mg), and [2- (4, -hydroxyphenol) 8-hydromidazo [1,2-a] pyridine was adsorbed and collected on the column.
- the column was washed with 1 mL of water, and then 1 mL of jetyl ether was passed through to elute [2- (4, -hydroxyphenol) -8-hydroimidazo [1,2-a] pyridine.
- the amount of radioactivity obtained was 185 MBq immediately after synthesis. Further, TLC analysis was carried out under the same conditions as in Example II-5, and as a result, the radiochemical purity was 91.7%.
- a solution obtained by adding 10 mL of water to the relevant fraction was reversed-phase column (trade name: Sep-Pak (registered trademark, Waters' Investment Limited) Light C18 Cartridges, Waters, packed with packing material. (IMPY was collected on the column by adsorption). The column was washed with 1 mL of water, and then 1 mL of ethanol was passed through to elute [ 12 3 ⁇ 4-IMPY. The amount of radioactivity obtained was 2.6 MBq immediately after synthesis. Further, TLC analysis was carried out under the same conditions as in Example 2, and as a result, the radiochemical purity was 98.0%.
- amyloid affinity of the compound of the present invention was evaluated by the following in vitro binding test.
- 6-Me-BTA-2 6-Methyl 2- [4,1- (N, N-dimethylamino) phenol] benzothiazole
- a solution containing L was prepared, and the amount of radioactivity was measured by the same operation as in the above (6) and (7).
- the obtained radioactivity was used as the background radioactivity and used for calculating the inhibition rate (hereinafter referred to as BG).
- the inhibition rate was determined from the above.
- a graph was prepared by plotting the value obtained by probit conversion of the obtained inhibition rate against the logarithm of the concentration of the evaluation compound, and an approximate straight line was prepared by the method of least squares. Using this straight line, the concentration of each evaluation compound was determined so that the amount of radioactivity was half of the value in the sample to which no evaluation compound was added, and the 50% inhibitory concentration (hereinafter referred to as IC value) of each compound was determined.
- IC value 50% inhibitory concentration
- Table 3 shows the IC value of each evaluation compound.
- Compounds 1-4 are all less than 100 IC
- the partition coefficient (hereinafter referred to as logP t) was measured using the octanol extraction method, which is generally known as an indicator of the permeability of the compound to the blood-brain barrier (hereinafter referred to as ⁇ ).
- Jetyl ether solution of Compound 5 prepared in Example 1-2 (Example 1-15), Compound 9 solution prepared in Example V-5 (Example V) -8), a jetyl ether solution of compound 10 prepared in Example ⁇ -6 (Example ⁇ -9), and a jetyl ether solution of compound 11 prepared in Example ⁇ -7 (Example 11- 10) and [ 12 3 ⁇ 4 YPY in ether solution (Comparative Example 1-6) prepared in Reference Example 1 were diluted with lOmgZmL ascorbic acid-containing physiological saline, respectively, to give a radioactivity concentration of 20-30 MBqZmL. Adjusted as follows.
- Table 4 shows the results.
- the logP value for Compound 5 is 1.6, and IMPY
- gP values are known to be between 1 and 3 (Douglas D. Dischino et al octanol
- Radioactivity concentration 20-30 MBq / mL 0.05 mL and the solution prepared in [Reference Example 2]
- 12- IMPY Comparative Example 1-7) dissolved in lOmgZmL ascorbic acid-containing physiological saline (Radioactivity concentration 20 ( ⁇ 30MBqZmL) 0.05 mL was administered to individual Wistar rats (7 weeks old) via tail vein under thiopental anesthesia. Blood was collected from the abdominal aorta at 2 minutes, 5 minutes, 30 minutes, and 60 minutes after administration, and the brain was collected, and the radioactivity of the brain was measured using the Autol 'gamma system (form: ARC-301B, manufactured by Aloka).
- the brain mass was further measured. Further, the radioactivity of 0.05 mL of a solution obtained by diluting the administration solution 1000 times was measured in the same manner (hereinafter referred to as “B” in this example). Using these measurement results, From the following formula (5), the amount of radioactivity accumulated per unit weight (% 1 DZg) in the brain at each dissection time point was calculated.
- amyloid suspension in this example.
- the brain was removed 60 minutes after administration, and a 10 m thick brain section was prepared using a microtome (form: CM3050S, manufactured by LEICA).
- the brain sections were exposed on an imaging plate for 20 hours, and image analysis was performed using a neuroimaging analyzer (form: BAS-2500, manufactured by Fuji Photo Film Co., Ltd.).
- Fig. 9 shows an image of autoradiogram and thioflavin T staining in a brain section of a rat injected with amyloid brain. As shown in this figure, clear accumulation of radioactivity was observed in the amygdala on the side where the amyloid suspension was injected. The results of thioflavin T staining at the site where radioactivity was accumulated confirmed that amyloid was present at the site. On the other hand, in the amygdaloid nucleus on the side injected with physiological saline, significant radioactivity accumulation compared to other sites was not confirmed.
- Compound 6 has the ability to accumulate in brain amyloid and has the ability to visualize brain amyloid.
- test substance and test strain (TA98 or TA100) or test substance After mixing S9mix and the test strain, they were layered on the medium on the test plate using soft agar and cultured at 37 ° C for 48 hours. Judgment is made by counting the number of back mutation colonies in the plate after culture. The number of back mutation colonies is more than twice that of the negative control. did.
- the experiment was performed using three animals at each time point.
- amyloid suspension The mixture was shaken to obtain lmgZmL aggregate ⁇
- Brains were removed 60 minutes after administration, and 10 m thick brain sections were prepared using a microtome (form: CM3050S, manufactured by LEICA). The brain sections were exposed on an imaging plate for 20 hours, and image analysis was performed using a neuroimaging analyzer (form: BAS-2500, manufactured by Fuji Photo Film Co., Ltd.).
- Fig. 14 shows an image of autoradiogram and thioflavin T staining in a brain section of a rat injected with amyloid in the brain.
- clear accumulation of radioactivity was observed in the amygdala on the side where the amyloid suspension was injected.
- significant radioactivity accumulation was not confirmed in the amygdaloid nucleus on the side where physiological saline was injected, compared with other sites.
- thioflavin T staining it was confirmed that amyloid was present at the radioactivity accumulation site! / (FIG. 14b). From these results, it was suggested that Compound 10 has the ability to accumulate in brain amyloid and has the ability to visualize brain amyloid.
- Example 11-13 The same operation as in Example 11-13 was performed, except that a solution obtained by dissolving Compound 11 in lOmgZmL ascorbic acid solution (radioactivity concentration of 30 MBqZmL in the sample solution) was used as the sample solution.
- Fig. 15 shows an image of autoradiogram and thioflavin T staining in a brain section of a rat injected with amyloid in the brain.
- a brain section of a rat injected with amyloid in the brain As shown in this figure, clear accumulation of radioactivity was observed in the amygdala on the side where the amyloid suspension was injected. Results of thioflavin T staining More amyloid is present at the radioactive accumulation site! / It was confirmed that ( Figure 15b). On the other hand, significant accumulation of radioactivity was not confirmed in the amygdaloid nucleus on the side injected with physiological saline, compared with other sites. From the above results, it was suggested that Compound 11 has the ability to accumulate in brain amyloid and has the ability to visualize brain amyloid.
- the amount of compound 8 added to the test plate was 7 (common ratio 3) with a maximum dose of 5000 / z gZ plate.
- Compound 8 and the test strain (TA98 or TA100), or compound 8 and S9mix and the test strain were mixed, then overlaid on the medium on the test plate using soft agar, and cultured at 37 ° C for 48 hours. Judgment is made by counting the number of back mutation colonies on the plate after culture. The number of back mutation colonies is more than twice that of the negative control. did.
- the compounds and diagnostic agents according to the present invention can be used in the field of diagnostic agents.
- FIG. 1 Synthesis scheme of 6-tributylstar 2- (4, monohydroxyphenol) imidazo [1,2-a] pyridin.
- FIG. 9 (a) Autoradiogram in brain section after administration of Compound 6 and (b) Fluorescent microscopic image of thioflavin T-stained sample (enlarged display of amyloid suspension administration site.).
- FIG. 14 (a) Autoradiogram in brain section after administration of Compound 10 and (b) Fluorescent micrograph of thioflavine T-stained sample (enlarged display of amyloid suspension administration site.)
- FIG. 15 (a) Autoradiogram in brain section after administration of Compound 11 and (b) Fluorescent microscopic image of thioflavine T-stained sample (enlarged display of amyloid suspension administration site.)
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Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07742483A EP2022792B1 (en) | 2006-04-28 | 2007-04-26 | Novel compound having affinity to amyloid |
| JP2008513252A JP5048655B2 (ja) | 2006-04-28 | 2007-04-26 | 新規アミロイド親和性化合物 |
| AT07742483T ATE493410T1 (de) | 2006-04-28 | 2007-04-26 | Neue verbindung mit affinität zu amyloid |
| DE602007011601T DE602007011601D1 (de) | 2006-04-28 | 2007-04-26 | Neue verbindung mit affinität zu amyloid |
| NZ572741A NZ572741A (en) | 2006-04-28 | 2007-04-26 | Novel compound having affinity to amyloid for diagnosing Alzheimer's |
| US12/226,561 US8022207B2 (en) | 2006-04-28 | 2007-04-26 | Compound having affinity to amyloid |
| CA002657312A CA2657312A1 (en) | 2006-04-28 | 2007-04-26 | Novel compound having affinity to amyloid |
| AU2007244313A AU2007244313B2 (en) | 2006-04-28 | 2007-04-26 | Novel compound having affinity to amyloid |
| IL194889A IL194889A0 (en) | 2006-04-28 | 2008-10-23 | Compound having affinity to amyloid |
| NO20084897A NO20084897L (no) | 2006-04-28 | 2008-11-20 | Ny forbindelse med affinitet til amuloid |
| US13/096,159 US20110201808A1 (en) | 2006-04-28 | 2011-04-28 | Novel compound having affinity to amyloid |
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| JP2006124811 | 2006-04-28 | ||
| JP2006-124811 | 2006-04-28 |
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| US13/096,159 Division US20110201808A1 (en) | 2006-04-28 | 2011-04-28 | Novel compound having affinity to amyloid |
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| US (2) | US8022207B2 (ja) |
| EP (1) | EP2022792B1 (ja) |
| JP (1) | JP5048655B2 (ja) |
| KR (1) | KR20080112343A (ja) |
| CN (1) | CN101472923A (ja) |
| AT (1) | ATE493410T1 (ja) |
| AU (1) | AU2007244313B2 (ja) |
| CA (1) | CA2657312A1 (ja) |
| DE (1) | DE602007011601D1 (ja) |
| ES (1) | ES2355079T3 (ja) |
| IL (1) | IL194889A0 (ja) |
| NO (1) | NO20084897L (ja) |
| NZ (1) | NZ572741A (ja) |
| RU (1) | RU2008147002A (ja) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009057575A1 (ja) * | 2007-10-30 | 2009-05-07 | Nihon Medi-Physics Co., Ltd. | 新規アミロイド親和性化合物の使用及び製造方法 |
| EP2218464A1 (en) * | 2009-02-11 | 2010-08-18 | Technische Universität München | Compounds for non-invasive measurement of aggregates of amyloid peptides |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200808795A (en) | 2006-05-19 | 2008-02-16 | Nihon Mediphysics Co Ltd | Novel compound having affinity for amyloid |
| WO2008059714A1 (en) * | 2006-11-17 | 2008-05-22 | Nihon Medi-Physics Co., Ltd. | Novel compounds with affinity for amyloid |
| US8207189B2 (en) | 2006-11-30 | 2012-06-26 | Nihon Medi-Physics Co., Ltd. | Compound having affinity for amyloid |
| EP2213672A4 (en) * | 2007-10-24 | 2012-05-02 | Nihon Mediphysics Co Ltd | NEW CONNECTION WITH AFFINITY TO AMYLOID |
| EP2213671A4 (en) * | 2007-10-26 | 2012-02-22 | Nihon Mediphysics Co Ltd | NEW CONNECTION WITH AFFINITY TO AMYLOID |
| US9926316B2 (en) * | 2016-03-03 | 2018-03-27 | The Cleveland Clinic Foundation | Antitumor derivatives for differentiation therapy |
| CN108822105A (zh) * | 2018-08-14 | 2018-11-16 | 河南师范大学 | 一种由乙苯类化合物合成2-芳基咪唑并[1,2-a]吡啶类化合物的方法 |
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- 2007-04-24 TW TW096114488A patent/TW200803903A/zh unknown
- 2007-04-26 EP EP07742483A patent/EP2022792B1/en not_active Not-in-force
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- 2007-04-26 US US12/226,561 patent/US8022207B2/en not_active Expired - Fee Related
- 2007-04-26 RU RU2008147002/04A patent/RU2008147002A/ru not_active Application Discontinuation
- 2007-04-26 JP JP2008513252A patent/JP5048655B2/ja not_active Expired - Fee Related
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- 2007-04-26 KR KR1020087026312A patent/KR20080112343A/ko not_active Withdrawn
- 2007-04-26 DE DE602007011601T patent/DE602007011601D1/de active Active
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009057575A1 (ja) * | 2007-10-30 | 2009-05-07 | Nihon Medi-Physics Co., Ltd. | 新規アミロイド親和性化合物の使用及び製造方法 |
| EP2218464A1 (en) * | 2009-02-11 | 2010-08-18 | Technische Universität München | Compounds for non-invasive measurement of aggregates of amyloid peptides |
Also Published As
| Publication number | Publication date |
|---|---|
| NZ572741A (en) | 2010-07-30 |
| CN101472923A (zh) | 2009-07-01 |
| US20110201808A1 (en) | 2011-08-18 |
| NO20084897L (no) | 2009-01-15 |
| KR20080112343A (ko) | 2008-12-24 |
| EP2022792A8 (en) | 2009-04-29 |
| IL194889A0 (en) | 2011-08-01 |
| US20100249407A1 (en) | 2010-09-30 |
| JP5048655B2 (ja) | 2012-10-17 |
| DE602007011601D1 (de) | 2011-02-10 |
| EP2022792A4 (en) | 2009-11-11 |
| TW200803903A (en) | 2008-01-16 |
| ATE493410T1 (de) | 2011-01-15 |
| US8022207B2 (en) | 2011-09-20 |
| JPWO2007125988A1 (ja) | 2009-09-10 |
| AU2007244313B2 (en) | 2011-09-08 |
| CA2657312A1 (en) | 2007-11-08 |
| RU2008147002A (ru) | 2010-06-10 |
| ES2355079T3 (es) | 2011-03-22 |
| EP2022792B1 (en) | 2010-12-29 |
| AU2007244313A1 (en) | 2007-11-08 |
| EP2022792A1 (en) | 2009-02-11 |
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