Process for producing vitamin A or its carboxylic acid esters, and intermediate compounds useful for the process
US4825006A · kind A · utility
16Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1985 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Dec 3, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing vitamin A represented by the formula ##STR1## which comprises treating a compound represented by the formula ##STR2## wherein R.sup.1 represents an aryl group which may be substituted, R.sup.21 and R.sup.22 each represents a hydrogen atom or a lower alkanoyl group, R.sup.3 represents an acetal-type protective group for a hydroxyl group, and X represents a halogen atom, with a base; and novel intermediate compounds useful for the above process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.