Vitamin a related compounds and process for producing the same
US6348622B1 · kind B1 · utility
1Cited by
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33Claims
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Key dates
| Filing date | Feb 9, 2000 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Feb 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a compound of the formula[I]: wherein R represents a hydrogen atom or a protective group for a hydroxyl group; andA represents a hydrogen atom, a halogen atom or a group of the formula A1: Q represents Q3: when A represents a halogen atom or a protective group for a hydroyl group, A represents Q4:  wherein R1 and R2 represent a hydrogen atom or a protective group for a hydroxyl group; and when A represents a hydrogen atom, Q is Q2:
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