发明名称 |
PROCESS FOR PRODUCING VITAMIN A OR ITS CARBOXYLIC ACID ESTERS, AND INTERMEDIATE COMPOUNDS USEFUL FOR THE PROCESS |
摘要 |
<p>A process for producing vitamin A represented by the formula <IMAGE> (I) which comprises treating a compound represented by the formula <IMAGE> (IIa-2) <IMAGE> (IIb) <IMAGE> (IIc) wherein R1 represents an aryl group which may be substituted, R21 and R22 each represents a hydrogen atom or a lower alkanoyl group, R3 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.</p> |
申请公布号 |
EP0187259(B1) |
申请公布日期 |
1990.06.13 |
申请号 |
EP19850115268 |
申请日期 |
1985.12.02 |
申请人 |
KURARAY CO., LTD. |
发明人 |
OTERA, JUNZO;MANDAI, TADAKATSU C/O PROF. B. GANEM;KAWADA, MIKIO |
分类号 |
C07C317/14;C07C403/00;C07C403/08;C07C403/22;C07D309/12 |
主分类号 |
C07C317/14 |
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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