GB768794A - Preparation of vitamin a aldehyde - Google Patents
Preparation of vitamin a aldehydeInfo
- Publication number
- GB768794A GB768794A GB11493/55A GB1149355A GB768794A GB 768794 A GB768794 A GB 768794A GB 11493/55 A GB11493/55 A GB 11493/55A GB 1149355 A GB1149355 A GB 1149355A GB 768794 A GB768794 A GB 768794A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vitamin
- acetal
- hydroxy
- hydrogen halide
- aldehyde
- 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
- C07C401/00—Irradiation products of cholesterol or its derivatives; Vitamin D derivatives, 9,10-seco cyclopenta[a]phenanthrene or analogues obtained by chemical preparation without irradiation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Vitamin A aldehyde is obtained in a single reaction step by contacting a hydroxy Vitamin A acetal with a hydrogen halide in an organic solvent containing at least a trace of water for a time sufficient to effect said conversion. The hydrogen halide and organic solvent may be initially present in the form of a water hydrolysable halogenated hydrocarbon solvent, e.g. chloroform, carbon tetrachloride and trichloroethane. Alternatively, aqueous acid or the acid gas such as HCl, HBr or HI, together with the solvent, e.g. methyl ethyl ketone, diethyl ketone, isopropyl alcohol and diethyl ether may be utilized. The hydrogen halide should be present in an amount of at least 0.02 per cent by weight, based on the acetal. As hydroxy Vitamin A acetals there may be used Vitamin A 3 : 5-, 3 : 6- or 3 : 7-diol acetals, Vitamin A-3-hydroxy acetal and its desmotropic isomer and Vitamin A-7-hydroxy acetal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US768794XA | 1954-04-22 | 1954-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB768794A true GB768794A (en) | 1957-02-20 |
Family
ID=22134728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11493/55A Expired GB768794A (en) | 1954-04-22 | 1955-04-21 | Preparation of vitamin a aldehyde |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB768794A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1151251B (en) * | 1959-07-06 | 1963-07-11 | Aec Chim Organ Biolog | Process for the preparation of carotene series aldehydes |
| DE1167325B (en) * | 1959-12-21 | 1964-04-09 | Bayer Ag | Process for the production of vitamin A aldehyde |
| DE1215126B (en) * | 1963-01-02 | 1966-04-28 | Aec Chim Organ Biolog | Process for the production of polyunsaturated C and C aldehydes |
-
1955
- 1955-04-21 GB GB11493/55A patent/GB768794A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1151251B (en) * | 1959-07-06 | 1963-07-11 | Aec Chim Organ Biolog | Process for the preparation of carotene series aldehydes |
| DE1167325B (en) * | 1959-12-21 | 1964-04-09 | Bayer Ag | Process for the production of vitamin A aldehyde |
| DE1215126B (en) * | 1963-01-02 | 1966-04-28 | Aec Chim Organ Biolog | Process for the production of polyunsaturated C and C aldehydes |
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