Steroid intermediate, method for production thereof and method of producing another steroid intermediate therefrom
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0008952A2
公开(公告)日:1980-03-19
A compound of the general formula:
wherein R' is a lower alkyl group; R2 is H or a lower alkyl group; Y is an oxo group, H or an unprotected or protected hydroxyl group; X is a methylene or ethylene group, for example, 7,7a-dihydro- 7aS-methyl-4- (3-butenyl)-1-tert. butoxy-5(6H)-indanone, which is an intermediate for steroids, is prepared by dehydrative cyclization of a compound of the general formula of
wherein R', R2, X and Y are the same as above, and can be oxidised in an oxygen-containing atmosphere in the presence of a small amount of water and a palladium catalyst with a reoxidising agent to form the corresponding -4-(3-oxobutyl) derivative when X is methylene or the corresponding -5-(3-oxobutyl) derivative when X is ethylene.
通式如下的化合物
其中 R'是低级烷基;R2 是 H 或低级烷基;Y 是氧代基团、H 或未保护或保护的羟基;X 是亚甲基或亚乙基,例如,7,7a-二氢-7aS-甲基-4-(3-丁烯基)-1-叔丁氧基-5(6H)-茚酮是类固醇的中间体,由通式如下的化合物脱水环化制得
其中 R'、R2、X 和 Y 与上述相同,并可在少量水和钯催化剂与还原剂存在下,在含 氧气氛中氧化,当 X 为亚甲基时生成相应的-4-(3-氧代丁基)衍生物,当 X 为乙烯 时生成相应的-5-(3-氧代丁基)衍生物。