GB701220A - Method of preparing aldehydes - Google Patents
Method of preparing aldehydesInfo
- Publication number
- GB701220A GB701220A GB4572/51A GB457251A GB701220A GB 701220 A GB701220 A GB 701220A GB 4572/51 A GB4572/51 A GB 4572/51A GB 457251 A GB457251 A GB 457251A GB 701220 A GB701220 A GB 701220A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tautomer
- methyl
- hydroxy
- dehydration
- pyran
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/20—Unsaturated compounds having —CHO groups bound to acyclic carbon atoms
- C07C47/26—Unsaturated compounds having —CHO groups bound to acyclic carbon atoms containing hydroxy groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Cosmetics (AREA)
Abstract
Hydroxyaldehydes are prepared by the action of lithium-aluminium hydride or b , g , d or e lactones in a solvent. The products may be converted to dehydration products of the furan and pyran series. In examples the production of a -methyl-d -hydroxycaproaldehyde or its tautomeric ring-form by the reduction of a -methyl-d -caprolactone, g -hydroxyvaleraldehyde and its tautomer from g -valerolactone, 1 - a - g - dihydroxy - b :b - dimethyl butyraldehyde and its tautomer from pantoyl lactone, 2 - hydroxmethylbenzaldehyde with 1-hydroxyphthalane, from phthalide (1 (3) isobenzofuranone), and g - methyl - g - phenyl - g - hydroxybutyraldehyde or its furane tautomer, from g - methyl - g - phenyl - buty - rolactone, are described; the dehydration of the ring tautomers of the aldehydes, which give hydrazone and other derivatives, but on dehydration behave as the ring compounds, gives the following products: 3:6-dimethyl-5:6 dihydro-(1:4H)-pyran from the 2-hydroxy-3:6-dimethyl (1:4 H) pyran, and 2-benzyl-2:3-dihydrofuran from g -hydroxy-g -benzylbutyraldehyde or its tautomer 2-benzyl-5-hydroxy-tetrahydrofuran; the latter dihydrofuran product may be reduced with Raney nickel to 2-benzyltetrahydrofuran.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US701220XA | 1950-04-28 | 1950-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB701220A true GB701220A (en) | 1953-12-23 |
Family
ID=22093250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4572/51A Expired GB701220A (en) | 1950-04-28 | 1951-02-26 | Method of preparing aldehydes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB701220A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1190450B (en) * | 1961-03-30 | 1965-04-08 | Ciba Geigy | Process for the production of hydroxyaldehydes or their cyclohemiacetals, their esters and ethers |
-
1951
- 1951-02-26 GB GB4572/51A patent/GB701220A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1190450B (en) * | 1961-03-30 | 1965-04-08 | Ciba Geigy | Process for the production of hydroxyaldehydes or their cyclohemiacetals, their esters and ethers |
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