发明名称 |
Process for the preparation of vitamin A and new intermediates |
摘要 |
A process for the preparation of vitamin A which comprises condensing ethynyl- beta -ionol with the acetal of a C5 allylic halide in the presence of a catalytic amount of a copper-based catalyst and a base; hydrogenating the condensed compound; eliminating the hydroxyl functional group to obtain retinal; and correcting the retinal obtained.
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申请公布号 |
US5637779(A) |
申请公布日期 |
1997.06.10 |
申请号 |
US19950383209 |
申请日期 |
1995.02.03 |
申请人 |
RHONE-POULENC NUTRITION ANIMALE |
发明人 |
ANCEL, JEAN-ERICK;BIENAYME, HUGUES |
分类号 |
B01J27/122;B01J31/30;C07B61/00;C07C35/18;C07C43/178;C07C43/303;C07C403/08;C07C403/10;C07C403/14;C07D317/20;C07D319/06;(IPC1-7):C07C35/18 |
主分类号 |
B01J27/122 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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