CN1023804C - 新型炔属、氰基芒霉素/腺苷衍生物的制备方法 - Google Patents
新型炔属、氰基芒霉素/腺苷衍生物的制备方法 Download PDFInfo
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- CN1023804C CN1023804C CN89101682A CN89101682A CN1023804C CN 1023804 C CN1023804 C CN 1023804C CN 89101682 A CN89101682 A CN 89101682A CN 89101682 A CN89101682 A CN 89101682A CN 1023804 C CN1023804 C CN 1023804C
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- aristeromycin
- purine
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Abstract
本发明涉及某种炔属、氰基和丙二烯系芒霉素/腺苷衍生物类,这些衍生物能有效地抑制与Adomet有关的甲基转移作用并能用于治疗患有肿瘤或病毒性疾病。
Description
在涉及病毒生长和繁殖、细胞的病毒转化、恶性细胞的生长等许多生物过程以及象趋药性和分泌这样的过程中,都牵连了与S-腺苷基-L-甲硫氨酸(Adomet)有关的甲基转移反应[见P.M.Ueland医药综述,34,223(1982)]。通常,这些甲基转移反应是用各种甲基转移酶催化的,在许多甲基受体基质的甲基化作用中所述甲基转移酶用Adomet作为甲基供体基质,所述甲基受体基质的例子有儿萘酚;降肾上腺素;组织胺;5-羟色胺;色胺;膜磷脂;赖氨酰,精氨酰,组氨酰,门冬氨酰,谷氨酰,以及某些蛋白的羧基;tRNA和mRNA;以及DNA。由于甲基由Adomet转移到适合的甲基受体基质中,所以这些不同的甲基转移酶生成了S-腺苷-L-高半脱氨酸(AdoHcy)副产品。
已表明AdoHcy是一种与Adomet有关的甲基转移反应的有效的反馈抑制剂。这种甲基转移酶的反馈抑制作用是AdoHcy的生物降解作用控制的,通过S-腺苷基-L-高半脱氨酸水解酶提供对于AdoHcy组织含量的体内平衡调节。熟悉本技术领域的人员通常认为S-腺苷基-L-高半脱氨酸水解酶的活性在AdoHcy的细胞组织含量的调节中起重要作用,并由此控制了与AdoHcy有关的甲基转移反应的活性。
本发明的化合物是S-腺苷基-L-高半脱氨酸水解酶的抑制
剂。因此,这些化合物抑制了自然产生的AdoHcy的生物降解作用,并导致了AdoHcy组织含量的提高。AdoHcy含量的提高反过来又提供了一种对与各种Adomet有关的甲基转移反应的内生反馈抑制作用,所述反应与涉及病毒生长和繁殖、细胞的病毒转移、毒性细胞的成长,以及例如趋药性和分泌这些过程的甲基转移反应有关。因此,本发明的化合物作为这些生物过程的抑制剂是有效的,而且目的用途,例如作为治疗身患各种病症的患者的治疗剂(所述病症包括病毒感染和肿瘤)也是有效的。
本发明涉及新的炔属、氰基和丙烯系芒霉素/腺苷衍生物,它们可用作S-腺苷基-L-高半脱氨酸水解酶的抑制剂,作为抗病毒剂和抗肿瘤剂也是有效的。
本发明提供了式(1)所示的新型化合物及其药用盐:
其中
V为氧基、亚甲基或硫基,
R1为乙炔基或氰基,
A1和A2分别为氢、卤素或羟基,条件是A1为羟基时,A2为氢,而A2为羟基时,A1为氢,
Y1为氮,CH基,CC1基,CBr基或CNH2基,
Y2和Y3分别为氮或CH基,
O为NH2、NHOH、NHCH3或氢,以及
Z是氢,卤素,或NH2。
另外,本发明还提供了式(1a)所示的新型化合物及其药用盐:
其中 V为氧基,亚甲基或硫基,
R2为氢或C1-C4烷基,
A1和A2分别为氢、卤素或羟基,条件是当A1为羟基时,A2为氢,而A2为羟基时,A1为氢,
Y1为氮,CH基,CCl基,CBr基或CNH2基,
Y2和Y3分别为氮或CH基,
O是NH2、NHOH、NHCH3,或氢,以及
Z是氢,卤素,或NH2。
本发明还提供了一种对需要的患者抑制与Adomet有关的甲基转移活性的方法,所述方法包括服用一种有效抑制量的式(1)或式(1a)所示化合物。
本发明的另一个实施方案是一种治疗患有肿瘤(或新生物)病症的患者或控制患肿瘤病症的患者肿瘤生长的方法,该方法包括服用一种有效抗肿瘤剂量的式(1)或(1a)化合物。
本发明的又一个实施方案是治疗患病毒性感染的患者或控制患此病的患者的方法,该方法包括服用一种有效抗病毒量的式(1)或(1a)化合物。
这里所使用的术语“卤素”指氟、氯、溴或碘原子,而术语“氮”指连接两个基团的三价氮原子。术语“乙炔基”指-C≡CH基,而术语“氰基”指-C≡N基。术语“C1-C4烷基”指1~4个碳原子的饱和直链或支链烃基。
式(1)或式(1a)所示的芒霉素/腺苷衍生物可采用本技术领域专业人员所熟悉和常用的工艺和技术制备。
制备式(1)所示化合物(其中R1为乙炔基)的普通合成方法示于方案A中。在以下各方案中,所有取代基均按上述定义,除非另有说明。
如式(2)所示,在步骤a中,活性羟基、氨基、羟铵基(适合原料的5′-羟基除外)均用本技术领域所熟悉的标准保护剂加以保护。对于
O和Z(其中O或Z为NH2),这些保护基团可以是常用的氨基保护剂,而对于3′-羟基,A1或A2(其中A1或A2为OH)和Q(其中Q为羟氨基)可以是常用的羟基保护基。方案A中的OB、AB 1、AB 2、QB和ZB表示这里所定义的、用适合的保护基所保护的3′-羟基、A、A、Q和Z基。
具体保护基的选择和使用为本技术领域的普通技术人员所熟知。通常,应选择那些能在后续合成步骤中充分保护所述的氨基和羟基并在不引起所需的产物降解的条件容易被除掉的保护基。
适合的羟基保护基的例子有C1-C6烷基、四氢吡喃基、甲氧基甲基、甲氧基乙氧基甲基、叔丁基、苄基和三苯基甲基。术语“C1-C6烷基”指具有直链、支链或环构型的1-6个碳原子的饱和羟基。优选的3′-羟基和A2(其中A2为羟基)的保护基包括2′,3′-O-亚异丙基(由未受保护的化合物与丙酮反应生成)和烷氧基亚甲基(由未受保护的化合物与三烷基原甲酸酯反应生成)。
适合的氨基保护基的例子有苯甲酰基、甲酰基、乙酰基、三氟乙酰基、邻苯二甲酰基、甲苯磺酰基、苯磺酰基、苄氧基羰基、取代的苄氧基羰基(例如对氯-、对溴-、对硝基-、对甲氧基-、邻氯-、2,4-二氯-和2,6-二氯衍生物),叔丁氧基羰基(BOC)、叔戊氧基羰基、异丙氧基羰基、2-(对联苯)-异丙氧基羰基、烯丙氧基羰基、环戊氧基羰基、环己氧基羰基、硬石氧基羰基、苯硫基羰基和三苯基甲基。优选的氨基保护基为通过未受保护的化合物与苯甲酰氯反应生成的二苯甲酰衍生物。
在步骤b中,适当保护的5′-羟基衍生物(3)氧化成相应的醛
(4)。优选的氧化剂为二环己基碳化二亚胺,甲基膦酸或二氯乙酸和二甲基亚砜。
醛(4)可以选择衍生以提高化合物的工艺性能或利用本技术领域所熟知和常用的工艺和技术便利地对它们进行纯化。例如,5′,5′-(N,N′-二苯基亚乙基二氨基)衍生物可采用Ranganathan等人的方法制备(J.Org.Chem.,39,290(1974))。
在步骤c中,氯乙烯衍生物(5)是通过使相应的醛(4)与氯化氯甲基三苯磷鎓或类似的烷基化剂反应而生成的。氯化氯甲基三苯磷鎓是受推荐的。
在步骤d中,氯乙烯衍生物(5)被脱卤化氢,生成乙炔基衍生物(6)。优选的脱卤化氢反应的试剂为二异丙基酰胺锂。
在步骤e中,用本技术领域所熟知和常用的工艺和技术除掉氨基保护基。例如,可通过用氨水解的方法除掉苯甲酰氨基保护基。
在步骤f中,根据本技术领域所熟知和常用的传统工艺和技术除掉羟基保护基。例如,2′,3′-O-亚异丙基保护基可通过使(7)与含水三氟乙酸反应除掉。
对于本技术的普通技术人员来说,方案A提出的普通合成工艺中所使用的原料容易得到。例如,式(1)或式(1a)所示的多种化合物的某些原料示于表1中。
表1
用于方案A原料的例子
式(1)或(1a)化合物,其中
V A1A2Y1Y2Y3Z Q 原料来源
O H OH CH N CH H NH2J.Med.Chem.25,
626(1982)
O OH H CH N N H NH2Het.Chem.14,
195(1977)
CH2H OH CH N N H NH2JACS88,3885
(1966)
O H H CH N N H NH22′-Deoxyadeno-
sine(commer-
cially available)
CH2H OH CH N CH H NH2J.Med.Chem.25,
626(1982)
O OH H CH N N F NH2JACS86,1242
(1964)
O H OH CH CH N H NH2Nucleosides &
Nucleotides,
1985,p.625
CH2H OH CH N N H NH2J.Pharm.Sci.62,
1252(1973)
CH2H CH2CH N N NH2NH2J.Med.Chem.27,
670(1984)
CH2H H CH N N H NH2J.Med.Chem.27,
1416(1984)
CH2OH H CH N N H NH2J.Med.Chem.20,
612(1977)
CH2H OH N N N H NH2J.Het.Chem.10.
601(1973)
CH2H H N N N NH2NH2J.Med.Chem.27,
1416(1984)
CH2H H N N N H NH2J.Het.Chem.10,
601(1973)
CH2H H N N N NH2NH2J.Med.Chem.27,
1416(1984)
表1(续)
V A1A2Y1Y2Y3Z Q Source of
Starting Material
CH2H OH N N N NH2NH2J.Med.Chem.27,
670(1984)
CH2OH H N N N NH2NH2J.Pharm.Sci.69,
1019(1980)
CH2H OH CH CH N H NH2Nucleosides
Nucleotides3,
345(1984)
CH2H OH CH CH N H NHCH3JACS85,193
(1963)
CH2H OH CBr CH N H NH2JACS86,1242
(1964)
S H OH CH N N H NH2Biochemistry9,
2367(1970)
辅加原料可采用类似表1所描述的方法以及本技术领域中所熟知和常用的传统方法制备。
以下实施例是方案A所描述的一种典型的合成方法。不用说,本实施例只是为了描述而并不打算以任何方式限制该发明的范围。
实施例1
9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-
核-己糖呋喃糖基)-9-H-嘌呤-6-胺。
步骤a:N6-苯甲酰基-2′,3′-O-亚异丙基-腺苷
按照Smrt等人的工艺[Coll.Czech.Comm.29,224(1964)],将腺苷转化成其2′,3′-丙酮化合物,接着再将苯甲酰转化成N6-苯甲酰基衍生物。
步骤b:N6,N6-双苯甲酰基-5′-脱氧-2′,3′-O-亚异丙基
-5′,5′-(N,N′-二苯基亚乙基二氨基)腺苷
按照Ranganathan等人的工艺[J.Org.Chem.39,290(1974)],将N6-苯甲酰基-2′,3′-O-亚异丙基腺苷转化成N6-苯甲酰基-5′-脱氧-2′,3′-O-亚异丙基-5′,5′-(N,N′-二苯基亚乙基二氨基)腺苷。将1.15ml(9.6mmol)苯甲酰氯加入在冰浴中冷却的含有2.96g这种产物的10ml吡啶中。在室温下搅拌该混合
物过夜,然后倒入冰水中。用100ml氯仿萃取该产物,然后用硫酸镁干燥。在旋转蒸发器中蒸发该溶液,然后加入甲苯。在真空中重复该蒸发过程,收集到4.07g黄色泡沫状物。通过40mm×10cm闪蒸硅胶柱,用4%醋酸乙酯/96%的二氯甲烷洗脱渗滤产物。合并适量的馏分,经蒸发,得到一种黄色油。使该油溶于乙醇中,再蒸发三次,得到一种固体。用50ml乙醇将该固体研成粉末,然后过滤。在真空中干燥该固体,得到2.67g标题化合物[熔点135~138摄氏度(℃)。
NMR(CDCl3,90MHz):δ1.30(3H,s),1.50(3H,s),3.3-3.7(4H,m),4.55(1H,m),5.1(2H,d,J=2),5.65(1H,d,J=2),6.1(1H,s),6.3-7.8(1H,m),8.40(1H,s)。
步骤b续:N6,N6-二苯甲酰基-2′,3′-O-亚异丙基腺苷-
5′-醛
在0℃下,将1.56g(8.2mmol)对甲苯磺酸一水化物与180ml丙酮的溶液,加入到2.64g(3.73mmol)N6,N6-二苯甲酰基-5′-脱氧-2′,3′-O-亚异丙基-5′,5′-(N,N′-二苯基亚乙基二氨基)腺苷与370ml二氯甲烷的溶液中。搅拌该混合物1.5小时,然后过滤。在旋转蒸发器上蒸发该滤液,然后在200ml二氯甲烷和水中分离残余物。用硫酸镁干燥二氯甲烷溶液并蒸发成泡沫状物。将2.10g该泡沫状物溶解到200ml苯中,然后在迪安-斯达克装置中回流一小时。蒸发该溶剂,得到2.06g标题化合物(核磁共振谱测
定出80%以上的该产物为醛)。
NMR(CDCl3,90MHz):δ1.40(3H,s),1.70(3H,s),4.65(1H,s),5.3(1H,d,J=7),5.45(1H,宽d,J=7),6.2(1H,s),7.2-7.8(10H,m),8.10(1H,s),8.45(主峰),和8.55(1H,s),9.3(1H,s,CHO)
步骤c:N6,N6-二苯甲酰基-2′,3′-O-亚异丙基-9-(6′-
氯-5′,6′-二脱氧-β-D-核-己糖-5′-呋喃糖
基)-9H-嘌呤-6-胺
将氯化氯甲基三苯磷鎓(6.8g,20mmol)加到冷却至-30℃的二异丙酰胺锂(20mmol)和500ml四氢呋喃(THF)溶液中。使该混合物升温至0℃,并在该温度下保持1小时。将该溶液急冷至-70℃,然后以滴加的方法加入到THF(100ml)和N6,N6-二苯甲酰基-2′,3′-O-亚异丙基腺苷-5′-醛(6.5g,17mmol)的溶液。在-70℃下搅拌该反应混合物2小时,然后将该混合物倒入水/二氯甲烷中。分离有机层,用无水硫酸镁干燥,然后蒸干。以己烷/醋酸乙酯(1.5/1)作洗脱液,用色谱法分离(硅胶闪蒸柱上)残余物,得到白色泡沫状的标题化合物(4.1g)。
MS:(Cl)MH+=546
分析值:计算C25H24ClN5O51/3CH3C(O)OC2H5
C61.14,H4.68,N12.17
实测值:C61.35,H4.62,N12.25
步骤d:N6,N6-二苯甲酰基-9-(5′,5′,6′,6′-四脱氢-5′,6′
-二脱氧-2′,3′-O-亚异丙基-β-D-核-己酮
呋喃糖基)-9H-嘌呤-6-胺
将N6,N6-二苯甲酰基-2′,3′-O-亚异丙基-9-(6-氯-5,6-二脱氧-β-D-核-己糖-5′-呋喃糖基)-9H-嘌呤-6-胺的THF(15ml)溶液以滴加的方式加入已急却至-70℃的二异丙酰胺锂(8mmol)的THF(120ml)溶液中。在-70℃下搅拌该反应混合物,历时2小时。将该混合物倒入水中,并用二氯甲烷萃取该水溶液。合并有机萃取液,在无水MgSO4上干燥,然后蒸发该有机溶液至干燥。以己烷/醋酸乙酯(2/1)作洗脱液,在硅胶闪蒸柱上用色谱法分离残余物,得到泡沫状标题化合物(0.8g)。
MS:(Cl)MH+=510。
步骤e:9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O
-亚异丙基-β-D-核-己糖呋喃糖基)-9H-嘌
呤-6-胺
在室温下搅拌N6,N6-二苯甲酰基-9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-亚异丙基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺(800mg,1.6mmol)的甲醇(10ml)溶液与浓氨水溶液(10ml)的混合物过夜。蒸发该混合物,以醋酸乙酯作洗脱液,在硅胶闪蒸柱上用色谱法分析残余物。用己烷/醋酸乙酯中重结晶纯化的标题化合物,得到熔点210-211℃的白色固体(170mg)。
分析值:计算C14H15N5O5:C55.81,H5.02,N23.24
实测值:C55.65,H5.03,N22.98
MS:(Cl)MH+=302
步骤f:9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-
核-己糖呋喃糖基)-9H-嘌呤-6-胺
在氮气氛下的50℃油浴中,加热9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-亚异丙基-β-D-核-己糖呋喃糖基)-
-9H-嘌呤-6-胺(270mg)的水/甲酸(各为30ml)溶液,历时2小时。蒸发该混合物,并用甲醇溶液重结晶该残留物,得到熔点213-214℃的白色固体状标题化合物(122mg)。
分析值:计算C11H11N3O3·3/4H2O:C48.08,H4.58,N25.49
实测值:C48.43,H4.52,N25.12
MS:(Cl)MH+=262
采用类似于以上实施例1中所述的工艺可以制备如下具体化合物:
3-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-核呋喃糖基)-3H-1,2,3-三唑并[4,5-d]嘧啶基-7-胺
1-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-核呋喃糖基)-1H-咪唑并[4,5-c]吡啶基-4-胺
9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-4-硫-β-D-核-己糖呋喃糖基)-9H-嘌呤-6-胺
9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-阿(拉伯)己糖呋喃糖基)-9H-嘌呤-6-胺
1R(1α.,2α.,3β.,5β.)-3-(9H-嘌呤-6-胺-9-基)-5-乙炔基-1,2-环戊烷二醇。
式(1)所示的芒霉素/腺苷衍生物(其中R1是氰基)可以按照本技术领域专业人员所熟知和常用的传统工艺和技术制备。
在步骤a中,醛衍生物(4)(其中适合的氨基和羟基以类似方案A中所述的方式被保护起来)被转化成相应的肟衍生物(9)。
该反应的优选试剂是O-苄基羟基胺,它导致了O-苄基肟的生成。通过与羟基胺氢氯化物反应,也可将醛衍生物(4)转化成游离肟。
在步骤b中,通过与一种适合的碱(例如二异丙酰胺锂)反应,将该肟衍生物(9)转化成氰基衍生物(10)。在使用游离肟的情况下,优选的试剂是适宜碱中的甲苯磺酰氯。
在步骤c和d中,氨基保护基和羟基保护基可以类似方案A步骤e和f所描述的方法除掉。
另外,通过采用本技术领域熟知的方法,使合适的5′-酸或相应的酯(其中活性羟基、氨基或羟氨基按方案A中步骤a描述的方法被保护起来)转化成5′-羧酰胺,可制备式(1)的芒霉素/腺苷衍生物(其中R1是氰基)
以下实施例为方案B所描述的典型合成方法。这一实施例的目的仅在于说明,而不打算以任何方式对本发明的范围作限制。
实施例2
9-(β-D-核糖呋喃腈)-9H-嘌呤-6-胺。
步骤a:N6,N6-二苯甲酰基-5′-脱氧-2′,3′-O-亚异丙基
腺苷-5-羧醛-O-苄基肟
按照实施例1所述制备N6,N6-二苯甲酰基-2′,3′-O-亚异丙基腺苷-5′-醛。使腺苷醛衍生物(2.6g,3.7mmol)和O-苄基羟基胺(0.85g,4mmol)在50ml乙醇中混合,然后在60℃油浴中加热,直至反应完成。蒸发该反应混合物,以醋酸乙酯/己烷洗脱液,在闪蒸硅胶柱上色谱分离残余物,得到泡沫状标题化合物。
步骤b:N6,N6-二苯甲酰基-9-(2′,3′-O-亚异丙基-β
-D-呋喃核糖腈)-9H-嘌呤-6-胺
将N6,N6-二苯甲酰基-5′-脱氧-2′,3′-O-亚异丙基腺苷-5-羧醛-O-苄基肟(618mg,1mmol)加入二异丙基酰胺锂(2mmol)的THF(25ml)溶液(急冷到-70℃)中。在-70℃下搅拌该反应混合物,直至薄层色谱分析表明该反应完成为止。将该混合物倒入水/二氯甲烷中,分层。在无水硫酸镁上使有机层干燥,再蒸干。以醋酸乙酯/己烷作洗脱液,在闪蒸硅胶柱上色谱分离残留物,得到泡沫状标题化合物。
步骤c和d:9-(β-D-核糖呋喃腈)-9H-嘌呤-6-胺
然后,按实施例1中步骤e和f所述,使N6,N6-二苯甲酰基-9-(2′,3′-O-亚异丙基-β-D-核糖呋喃腈)-9-H-嘌呤-6-胺脱封,得到标题化合物。用甲醇,重结晶该产物。
如下具体化合物可由类似实施例2中所描述的工艺制备:
9-(β-D-阿(拉伯)呋喃糖腈)-9H-嘌呤-6-胺
9-(4-硫-β-D-核糖呋喃腈)-9H-嘌呤-6-胺
1R(1α.,2α.,3β.,5β.)-3-(9H-嘌呤-6-胺-9-基)-5-氰基-1,2-环戊二醇
1-(β-D-核糖呋喃腈)-1H-咪唑并[4,5-c]吡啶-4-胺
式(1a)的丙二烯系芒霉素/腺苷衍生物可根据本技术领域所熟知的传统的工艺和技术制备。制备式(1a)化合物的通用合成工艺列示在方案c中。
在步骤a中,按照方案A提出的工序制备的且在任何活性羟基部分上带有保护基团的部分脱封的炔属衍生物(7)用碱异构化,得到所需的丙二烯系衍生物(13)。在需要式(1a)的化合物中R2是氢时,可将炔属衍生物与乙醇钠反应。在需要式(1a)的化合物中R2是烷基时,可将炔属衍生物(7)与碱(如二异丙基酰胺锂)反应,按照本技术领域中熟知和常用的工艺与合适的C1-C4烷基;卤反应。这样便形成了合成的烷基化炔属衍生物,然后,这种衍生物可按上述步骤(a)和(b)进一步反应。
然后,在步骤b中,可按方案A(步骤f)描述的类似方法除去氨基保护基。
下面的实施例示出了按方案c描述的典型合成方法。可以理解,该实施例仅用来说明,并不意味着以任何方式限制本发明的范围。
实施例3
9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-β-D-核-己糖
呋喃糖基)-9-H-嘌呤-6-胺
步骤a:9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O
-亚异丙基-β-D-核-己糖呋喃糖基)-9-H-嘌
呤-6-胺
按照实施例1所述的方法制备9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-亚异丙基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺。将部分保护的炔属衍生物(600mg)加入到乙醇钠和乙醇构成的溶液中(该溶液是通过将100mg金属钠溶于20ml乙醇制备的)在氮气气氛下,回流反应混合物1小时。将混合物冷却,注入水/二氯甲烷,并使有机相分离。在无水硫酸镁上干燥有机层并蒸干。用己烷/二氯甲烷/甲醇的混合物重结晶,得到白色粉末状标题化合物(230mg),其熔点为209℃(收缩度182℃)。
MS:(Cl)MH+=302
分析值:计算C14H15N5O3:C55.81,H5.02,N23.24
实测值:C55.36,H5.03,N23.46
NMR(13C):在196.25ppm显示出中心丙二烯
以类似方法,可从9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-乙氧基亚甲基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺制备9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-乙氧基亚甲基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺,前者的制备是按照方案A提出的工序,在三氯乙酸中使用合适的原料与
甲酸三乙酯反应而进行的。
步骤b:9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-β-D-
核-己糖呋喃糖基)-9-H-嘌呤-6-胺
将9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-异亚丙基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺(50mg)和PdCl2(CH3CN)2(5mg)加入到乙腈水溶液(5ml)中并搅拌直至反应完全。蒸发反应混合物并用甲醇重结晶产物,得到白色固体状标题化合物。
在使用2′,3′-O-乙氧基亚甲基衍生物的情况下,于40℃搅拌9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-2′,3′-O-乙氧基亚甲基-β-D-核-己糖呋喃糖基)-9-H-嘌呤-6-胺(50mg)和对甲苯磺酸吡啶鎓(50mg)在乙醇(12ml)和H2O(6ml)中构成的溶液,直至乙氧基亚甲基保护基裂开为开。蒸发反应混合物并用甲醇再结晶产物。
通过上述实施例3中类似工序可制备出以下具体化合物:
1R(1α.,2α.,3β.)-3-(9H-嘌呤-6-胺-9-基)-5-丙二烯-1,2-环戊二醇
3-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-β-D-核己糖呋喃糖基)-3H-咪唑并[4,5-b]吡啶-7-胺
3-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-4′-硫-β-D-核己糖呋喃糖基)-3H-咪唑并[4,5-b]吡啶-7-胺
9-(4′,5′,5′,6′-四脱氢-5′,6′-二脱氧-4′-硫-β-D-核己糖呋喃糖基)-9-H-嘌呤-6-胺
在方案D中给出了制备式(1)或(1a)的炔属、氰基和丙二烯系腺苷衍生物的另一种方法。这种方法包括分别制备腺苷基碱和核糖基部分,然后使它们进行缩合。
按照本技术领域专业人员熟知和常用的标准技术和方法制备炔属核糖基衍生物(15)。例如,可通过方案A中描述的类似方法以合适的核糖基衍生物制备这些化合物。合适的原料是容易得到的。
在步骤a中,用一种酸(如乙酸)水解这些衍生物(15)。经水解的衍生物(16)在步骤b中通过于吡啶中与乙酸酐反应随后转化成相应的乙酸酯(17)。
制备腺嘌呤衍生物(18)的方法也涉及本技术领域专业人员熟知和常用的标准技术和方法。
在存在双-三甲基甲硅烷基乙酰胺和路易士酸(如三甲基甲硅烷基三氟甲烷磺酸盐)的条件下,乙酸酯(17)可通过熔融反应或缩合反应与合适的腺嘌呤衍生物(18)缩合。
然后,经缩合的产物(6)可按照方案A(步骤e和f)描述的方法通过水解脱封,或按照方案C描述的方法进一步反应以得到式(1a)化合物。
也可以按照类似方案D中描述的方法制备其中R1是氰基的式(1)的化合物。
方案C提出的普通合成工序中所用的原料对于本技术领域专业人员来说简单易得。例如,式(1)或(1a)各种化合物所用的原料列于表2。
表2
用于方案D的原料的例子
式(1)或(1a)化合物,其中
V A1A2Y1Y2Y3Z O 原料来源
O H OH CH N N Cl NH22-氯腺嘌呤
Tet.Lett
1977,3433
O H OH CH N N H NH2腺嘌呤
CH2H OH CH N CH H NH23-deaza 腺嘌呤
通过采用表2中描述的类似方法以及本技术领域熟知和常用方法可制备其它一些原料。
在另一个实施方案中,本发明提供一种抑制需要治疗的患者体中的与AdoMet有关的甲基转移活性的方法,该方法包括服用一种有效抑制量的式(1)或(1a)化合物。术语“有效抑制量”指的是在服用一剂量或多剂量后是以抑制与AdoMet有关的甲基转移活
性。
这里所用的术语“患者”指的是热血动物,例如患有特殊病症的哺乳动物。不用说,象狗、猫、鼠、马、牛类牲畜,羊和人都是在该术语意义范围之内的动物的例子。
据伩,式(1)或(1a)化合物通过抑制AdoHcy水解酶对与AdoMet有关的甲基转移产生了抑制作用,从而提高了AdoHcy细胞组织含量,反过来又抑制了与AdoMet有关的甲基转移作用。但是,可以理解,本发明决不被任何具体理论或在目的应用中为了说明其作用而提出的机理所限制。
本技术领域专业人员都清楚,各种病症,例如某种肿瘤病和病毒性传染都是以过量的与AdoMet有关的甲基转移活性为特征的。这里所用的术语“过量”指的是使病情加剧的活性程度。
更具体地说,本发明提供了一种治疗患有以过量的与AdoMet有关的甲基转移活性为特征的的肿瘤病患者的方法,它包括服用一种有效抗肿瘤量的式(1)或(1a化合物。这里所用的术语“肿瘤病症”指的是一种变态病症或病情,其特征是细胞的生长激增或肿瘤。对于以过量的与AdoMet有关的甲基转移活性为特征的肿瘤病症,特别是用式(1)或(1a)化合物治疗这种病有效。该病包括白血病,例如但不限于急性淋巴胚细胞,慢性淋巴细胞、急性肌胚细胞、慢性肌细胞等白血病;癌,例如但不限于颈、管口、胃、小肠、结肠和肺等癌;肉瘤,例如但不限于骨瘤、脂肪瘤、脂肉瘤、血管瘤和血管肉瘤;黑色瘤,包括无色素瘤和黑色素瘤在内;以及混合型的肿瘤,例如但不限于癌肉瘤、淋巴状细胞组织型、叶状网型、细胞肉瘤和Hodgkins病。
式(1)或(1a)化合物的有效抗肿瘤量指的是患者服用一剂或多
剂量时能有效地控制肿瘤生长,或用这种药物治疗时可使患者存活时间延长,超过未作治疗所预计的时间。这里所用的术语肿瘤的“控制生长”指的是减慢、干扰、抑制或中止其生长和变态,而并不一定指全部消除肿瘤。
另外,本发明提供了一种治疗患有以过量的与AdoMet有关的甲基转移活性为特征的病毒性传染患者的方法,该方法包括服用一种有效抗病毒量的式(1)或(1a)化合物。这里所用的术语“病毒性感染”指的是以细胞的病毒性变性、病毒繁殖和增生为特征的变态。对于以过量的与AdoMet有关的甲基转移活性为特征的病毒性感染,特别有效的治疗方法是使用一种式(1)或(1a)化合物。这类病毒性感染有:并发病毒,例如但不限于HTCV-Ⅰ、HTLV-Ⅱ人体免疫力缺乏病毒,HTLV-Ⅲ(AIDS病毒)等;RNA病毒,例如但不限于流行性感冒A、B和C型,腮腺炎、麻疹、鼻毒病、登革热、风疹、狂犬病、肝炎病毒A、脑炎病毒等;DNV病毒,例如但不限于泡疹、牛痘、乳头状瘤病毒(Wart),肝炎病毒B等。
式(1)或(1a)化合物的有效抗病毒量指的是有效地控制病毒的用量。这种病毒控制指的是减慢、干扰、抑制或中止病毒细胞传播或病毒繁殖和增生,且并不一定指全部清除病毒。
本技术领域诊断家通过使用常规技术和观察类似条件下得到的结果,很容易确定有效剂量。确定有效剂量,诊断家要考虑多种因素,它们包括但不限于:哺乳动物种类;其大小、年龄、和一般健康状况;涉及的具体疾病;疾病的复杂程度或严重程度;患者的反应;服用的具体化合物;服用制剂的生物有效性;所选用的剂量方式;件随药物的使用;以及其它条件。
式(1)或(1a)化合物的有效抗肿瘤和抗病毒的用量预计可以每天每公斤体重约0.1mg变化到约100mg/kg/天。优选用量为约0.5~约10mg/kg/天。
在另一个实施方案中,本发明涉及一种治疗患有肿瘤病症或病毒性感染的病人的方法,它包括服用一种有效抗肿瘤或抗病毒量的式(1)或(1a)化合物(式中Q为NH2),同时,与有效抑制量的Adenosine Deaminase(ADA)抑制剂一起共同治疗。术语“共同治疗”指的是基本上同时与ADA抑制剂一起共同服用式(1)或(1a)化合物,或在用式(1)或(1a)化合物治疗前或治疗后用ADA抑制剂对患者治疗。ADA抑制剂的有效剂量是有效地显著抑制患者的ADA的用量。
ADA使式(1)或(1a)化合物(其中Q为NH)脱氧,从而使活性化合物降解为相对惰性的代谢物。当式(1)或(1a)化合物(其中Q是NH2)和ADA抑制剂共同服用时,药剂量或服药次数要比只服用式(1)或(1a)化合物时所需的量小。
各种药用无毒ADA抑制剂都可以使用,包括但不限于脱氧助间型霉素。ADA抑制剂的有效抑制量可从约0.05mg/kg/天变化到约0.5mg/kg/天,最好约0.1mg/kg/天~约0.3mg/kg/天。脱氧助间型霉素是用于与式(1)或(1a)化合物(式中Q是NH2)共同治疗的优选的ADA抑制剂。
在对患有上述病症的患者治疗时,可以任何方式或形式服用式(1)或(1a)化合物,包括口服或静脉注射,只要该化合物的有效量在生理上能接受即可。举例来说,式(1)或(1a)化合物可通过口、皮下、肌肉、静脉内、皮内、鼻内、直肠等给药。一般来说,最好采用口服。根据所选化合物的具体特性、待治疗的病症、病期和其
它有关条件,制备配方领域内的专业人员可以很容易地选择合适的给药形式和方式。
可单独服用化合物,或以药用载体或赋形剂配合的药用组合物的形式服用化合物,其中载体或赋形剂的比例和性质可通过所选化合物的溶解度和化学特性、所选的给药途径和标准药理实践来确定。除此之外,如前所述,可进一步与ADA抑制剂一起服用式(1)或(1a)化合物(其中Q是NH2)。虽然本发明的化合物本身便有效,但从稳定性、结晶方便、提高溶解度等方面考虑,它们可以其药用酸加成盐的形式配制和服用。
在另一个实施方案中,本发明提供了一种药用组合物,它含有式(1)或(1a)化合物并以掺合物的形式与一种或多种药用载体或赋形剂一起配制而成。另外,本发明提供了一种含有效量的式(1)或(1a)化合物(其中Q是NH2)和有效的ADA抑制量的ADA抑制剂、并以掺合物的形式与一种或多种药用载体或赋形剂配制而成的药用组合物。对于式(1)或(1a)化合物所用的术语“有效量”指的是要能够有效地抑制、抗肿瘤或抗病毒的量。
药用组合物可按制药技术领域公知的方法加以制备。载体或赋形剂可以是起到活性成分的载体或媒介物作用的固体、半固体或液体材料。合适的载体或赋形剂是本领域公知的。药用组合物可采用口服或肠外给药,并可以片剂、胶囊、塞药、溶液、悬浮液等的形式给患者用药。
本发明的化合物可与例如惰性稀释剂或可食用的载体一起口服。它们可封装在明胶胶囊内或压制入片剂内。从口服治疗考虑,该化合物可与赋形剂混合并采用片剂、锭剂、胶囊、酰、悬浮液、糖浆、干胶片、口香糖等形式。这些制剂应含有至少4%的本发明化合物、
活性成分,但也可依具体形式而变化,以含4%~70%(重量)单位为宜。组合物中化合物的量应以可达到合适剂量为好。按照本发明优选的组合物和制剂应以口服剂量单位形式含5.0~300mg本发明的化合物加以制备。
片剂、药丸、胶囊、锭剂等也可含有一种或多种以下辅料:粘合剂,例如微晶纤维素,黄蓍胶或明胶;赋形剂,例如淀粉或乳糖;崩解剂,例如藻酸,Primogel,玉米淀粉等;润滑剂,例如硬脂酸镁或Sterotex;滑动剂,例如胶体二氧化硅;也可以加入甜味剂,例如蔗糖或糖精,或香味剂,例如薄荷,水杨酸甲酯或橙味调味剂。当采用的剂量单位形式是胶囊时,除了上述物质之外,它还可含液体载体,例如聚乙二醇或脂肪油。其它剂量单位形式可含有改进剂量单位物理形式的不同物质,例如涂料。所以,片剂或药丸可用糖、紫胶或其它引入的涂料剂。除了本发明的化合物之外,甜浆还可含有蔗糖甜味剂和某种防护剂、染料和着色剂和香味剂。制备这些不同组合物所用的物质应是药理纯和无毒的。
为了采用肠以外给药治疗法,例如肌肉、静脉内和皮下给药,本发明的化合物可混入溶液或悬浮液中。这些制剂应含有至少0.1%本发明的化合物。但其量也可从0.1%变化到约50%(重量)。这类化合物中所含的本发明化合物的量以应达到合适剂量为好。按照本发明优选组合物和制剂应以肠以外单位剂量含5.0~100mg本发明的化合物加以制备。
溶液或悬浮液也可包括一种或多种以下辅助剂:无毒稀释剂,例如注射用水、食盐水、固定油类、聚乙二醇类、甘油、丙二醇或其它合成溶剂;抗菌剂,例如苄醇或甲基Paraben,抗氧化剂类,例如抗坏血酸或亚硫酸钠;螯合剂,例如乙二胺四乙胺,缓冲剂,
例如乙酸乙酯,柠檬酸钠或磷酸酯和用于调节健康状况的药剂,例如氯化钠或葡萄糖。肠以外制剂可封装在安瓿、一次性注射器或由玻璃或塑料制成的多剂量小药瓶内。
含式(1)或(1a)化合物(式中Q是NH)的上述任何药用组合物也可含有有效抑制量的ADA抑制剂,并以掺合物的形式与上述成分一起配制。
正如任何具有特殊效用、结构相关的化合物的基团一样,某种基团和构型对于式(1)或(1a)化合物来说,在目的用途中是受推荐的。
就取代基R1来说,其中R1是乙炔基或氰基的化合物通常是受推荐的。就取代基R2来说,其中R2是氢的化合物通常是受推荐的。
就取代基A1和A2来说,其中A1和A2中之一是羟基,而另一个是氢的化合物通常是受推荐的。A1是氢而A2是羟基的化合物尤其受推荐。
以下是进一步推荐的实施例:式(1)化合物,其中V是氧基,式(1a)化合物,其中V是亚甲基或硫基,式(1)或(1a)化合物,其中Y1是CH基,式(1)或(1a)化合物,其中Y2是氮,式(1)或(1a)化合物,其中Y3是氮,以及式(1)或(1a)化合物,其中Z是氢。最后,就Q来说,那些其中Q1是NH2或NHCH3的式(1)或(1a)化合物通常是受推荐的,其中尤以Q是NH的式(1)或(1a)化合物最受推荐。
下表给出了式(1)或(1a)化合物,它们是本发明最受推荐的实施例:
9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-核-己糖
呋喃糖基)-9H-嘌呤-6-胺
9-(4′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-核-己糖
呋喃糖基)-9H-嘌呤-6-胺
9-(β-D-核糖呋喃腈)-9H-嘌呤-6-胺
9-(β-D-呋喃阿(拉伯)糖腈)-9H-嘌呤-6-胺
9-(4′,5′,5′,6′-四脱氢-5′,5′-二脱氧-4′-硫-β-D-核-己糖呋喃糖基)-9H-嘌呤-6-胺
上表仅是用来说明本发明特别受推荐的具体实施例,不用说该表并不以任何方式限制本发明的范围。
Claims (18)
2、权利要求1的方法,其中R1是乙炔基。
3、权利要求1的方法,其中V是氧。
4、权利要求1的方法,其中A2是羟基。
5、权利要求1的方法,其中A1是羟基。
6、权利要求1的方法,其中Y2是氮。
7、权利要求1的方法,其中Y3是氮。
8、权利要求1的方法,其中芒霉素/腺苷衍生物是9-(β-D呋喃核糖腈)-9H-嘌呤-6-胺。
9、权利要求1的方法,其中所得到的化合是9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-核己糖呋喃糖基)-9H-嘌呤-6-胺。
10、权利要求1的方法,其中芒霉素/腺苷衍生物是9-(β-D-呋喃阿糖腈)-9H-嘌呤-6-胺。
11、权利要求1的方法,其中芒霉素/腺苷衍生物是3-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-呋喃核糖基)-3H-1,2,3-三唑并[4,5-d]嘧啶-7-胺。
12、权利要求1的方法,其中芒霉素/腺苷衍生物是1-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-呋喃核糖基)-1H-咪唑并[4,5-c]嘧啶-4-胺。
13、权利要求1的方法,其中芒霉素/腺苷衍生物是9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-4-硫基-β-D-核-己糖呋喃糖基)-9H-嘌呤-6-胺。
14、权利要求1的方法,其中芒霉素/腺苷衍生物是9-(5′,5′,6′,6′-四脱氢-5′,6′-二脱氧-β-D-阿(拉伯)-己糖呋喃糖基)-9H-嘌呤-6-胺。
15、权利要求1的方法,其中芒霉素/腺苷衍生物是1R-(1α.,2α.,3β.,5β.)-3-(9H-嘌呤-6-胺-9-基)-5-乙炔基-1,2-环戊二醇。
16、权利要求1的方法,其中芒霉素/腺苷衍生物是9-(4-硫基-β-D-呋喃核糖腈)-9H-嘌呤-6-胺。
17、权利要求1的方法,其中芒霉素/腺苷衍生物是1R-(1α.,2α.,3β.,5β.)-3-(9H-嘌呤-6-胺-9-基)-5-氰基-1,2-环戊二醇。
18、权利要求1的方法,其中芒霉素/腺苷衍生物是1-(β-D-呋喃核糖腈)-1H-嘧唑并-[4,5-c]吡啶-4-胺。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US173,782 | 1988-03-25 | ||
| US07/173,782 US4996308A (en) | 1988-03-25 | 1988-03-25 | Derivatives with unsaturated substitutions for the 5'-hydroxymethyl group |
| US173.782 | 1988-03-25 |
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| Publication Number | Publication Date |
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| CN1036579A CN1036579A (zh) | 1989-10-25 |
| CN1023804C true CN1023804C (zh) | 1994-02-16 |
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| Country | Link |
|---|---|
| US (1) | US4996308A (zh) |
| EP (1) | EP0334361B1 (zh) |
| JP (1) | JP2829737B2 (zh) |
| KR (1) | KR0135529B1 (zh) |
| CN (1) | CN1023804C (zh) |
| AR (1) | AR247403A1 (zh) |
| AT (1) | ATE121415T1 (zh) |
| AU (1) | AU606792B2 (zh) |
| CA (1) | CA1322195C (zh) |
| DE (1) | DE68922235T2 (zh) |
| DK (1) | DK171645B1 (zh) |
| ES (1) | ES2074060T3 (zh) |
| FI (1) | FI90877C (zh) |
| HU (1) | HU203561B (zh) |
| IE (1) | IE67543B1 (zh) |
| IL (1) | IL89689A0 (zh) |
| NO (1) | NO171856C (zh) |
| NZ (1) | NZ228422A (zh) |
| PH (1) | PH26776A (zh) |
| PT (1) | PT90080B (zh) |
| ZA (1) | ZA892105B (zh) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102746304A (zh) * | 2012-06-21 | 2012-10-24 | 成都苑东药业有限公司 | 一种嘌呤胺类化合物及其制备方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3924424A1 (de) * | 1989-07-24 | 1991-01-31 | Boehringer Mannheim Gmbh | Nucleosid-derivate, verfahren zu deren herstellung, deren verwendung als arzneimittel sowie deren verwendung bei der nucleinsaeure-sequenzierung |
| AU629988B2 (en) * | 1989-10-11 | 1992-10-15 | Merrell Dow Pharmaceuticals Inc. | Inosine/guanosine derivatives as antineoplastic agents |
| ZA907994B (en) * | 1989-10-11 | 1991-07-31 | Merrell Dow Pharma | Novel inosine/guanosine derivatives |
| GB8926417D0 (en) * | 1989-11-22 | 1990-01-10 | Wellcome Found | Heterocyclic compounds |
| JPH0421682A (ja) * | 1990-05-11 | 1992-01-24 | Asahi Chem Ind Co Ltd | 2―フルオロネプラノシンaおよびその製造法 |
| GB9205071D0 (en) * | 1992-03-09 | 1992-04-22 | Wellcome Found | Therapeutic nucleosides |
| US5399580A (en) * | 1993-03-08 | 1995-03-21 | Burroughs Wellcome Co. | Therapeutic nucleosides-uses |
| EP0690068A4 (en) * | 1993-03-18 | 1996-07-31 | Akira Matsuda | 2'-METHYLIDES NUCLEOTIDE COMPOUNDS, METHOD FOR THEIR PRODUCTION AND THEIR PHARMACEUTICAL USE |
| EP0784624A1 (en) * | 1994-10-05 | 1997-07-23 | Chiroscience Limited | Purine and guanine compounds as inhibitors of pnp |
| GB9600142D0 (en) * | 1996-01-05 | 1996-03-06 | Wellcome Found | Chemical compounds |
| CZ9901996A3 (cs) * | 1999-06-04 | 2001-01-17 | Ústav organické chemie a biochemie AV ČR | Nové 6-fenylpurinové 9-ß-D-ribonukleosidy s antineoplastickým účinkem, jejich použití k přípravě farmaceutických preparátů a farmaceutické přípravky, které je obsahují |
| WO2000074686A1 (en) * | 1999-06-09 | 2000-12-14 | Anticancer, Inc. | Modulators of methylation for control of bacterial virulence |
| US6579857B1 (en) | 1999-06-11 | 2003-06-17 | Evanston Northwestern Healthcare Research Institute | Combination cancer therapy comprising adenosine and deaminase enzyme inhibitors |
| MXPA02011691A (es) * | 2000-05-26 | 2004-05-17 | Idenix Cayman Ltd | Metodos y composiciones para el tratamiento de flavivirus y pestivirus. |
| US20040162422A1 (en) * | 2001-03-20 | 2004-08-19 | Adrian Hall | Chemical compounds |
| KR20040036417A (ko) * | 2002-10-25 | 2004-04-30 | 정낙신 | 항암 활성을 갖는 티오뉴클레오시드 유도체 및 이를함유하는 약학적 조성물 |
| JP5002851B2 (ja) * | 2005-01-20 | 2012-08-15 | 独立行政法人理化学研究所 | イミダゾピリジン誘導体 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1113851A (en) * | 1965-05-29 | 1968-05-15 | Upjohn Co | Decoyinine derivatives |
| US3472837A (en) * | 1966-10-10 | 1969-10-14 | Syntex Corp | Unsaturated nucleosides and process for their preparation |
| US3575959A (en) * | 1969-05-13 | 1971-04-20 | Merck & Co Inc | 5'-substituted ribofuranosyl nucleosides |
| US3585189A (en) * | 1969-06-27 | 1971-06-15 | Syntex Corp | Unsaturated nucleosides and processes for their preparation |
| US3910885A (en) * | 1974-03-12 | 1975-10-07 | Syntex Inc | 4-Alkoxy nucleosides and intermediates therefore |
| DE3587500T2 (de) * | 1984-12-04 | 1993-12-16 | Lilly Co Eli | Tumorbehandlung bei Säugetieren. |
| GB8708050D0 (en) * | 1987-04-03 | 1987-05-07 | Wellcome Found | Therapeutic nucleosides |
| NZ225906A (en) * | 1987-08-26 | 1990-10-26 | Merrell Dow Pharma | Aristeromycin/adenosine derivatives and pharmaceutical compositions |
-
1988
- 1988-03-25 US US07/173,782 patent/US4996308A/en not_active Expired - Lifetime
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- 1989-03-20 ZA ZA892105A patent/ZA892105B/xx unknown
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102746304A (zh) * | 2012-06-21 | 2012-10-24 | 成都苑东药业有限公司 | 一种嘌呤胺类化合物及其制备方法 |
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