The present invention relates to intermediates of the general formula:
(wherein Y and Z, which may be the same or different, each represents a trans-vinylene group or an ethylene group, R2 represents a hydrogen atom or a methyl or ethyl group, R3 represents a single bond or an alkylene group of 1 to 5 carbon atoms, R' represents an alkyl group of 1 to 8 carbon atoms, a cycloalkyl group of 4 to 7 carbon atoms unsubstituted or substituted by at least one alkyl group of 1 to 8 carbon atoms or a phenyl or phenoxy group unsubstituted or substituted by at least one halogen atom, trifluoromethyl group of alkyl group of 1 to 4 carbon atoms, R5 represents a hydroxy- protecting group which can be removed in acidic conditions and W1 represents a group of the formula : -COOR1, -CON(R6)2, -CH2OR5 or -CH(OR7)CH2OR5 (in which R' represents a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, the groups R6, which may be the same or different, each represents an alkyl group of 1 to 4 carbon atoms, a phenyl group or an aralkyl group of 7 to 12 carbon atoms or R7 represents an acyl group of 2 to 12 carbon atoms and R5 is as hereinbefore defined) with the proviso that, when R3 represents a single bond, R4 does not represent a substituted or unsubstituted phenoxy group, which are useful in the preparation of 6-keto-prostaglandin derivatives.
本发明涉及通式如下的中间体:
(其中 Y 和 Z 可以相同或不同,各自代表反式
乙烯基或
乙烯基,R2 代表氢原子或甲基或乙基,R3 代表单键或 1 至 5 个碳原子的亚烷基,R'代表 1 至 8 个碳原子的烷基、R5 代表可在酸性条件下去除的羟基保护基团,W1 代表式中的一个基团:-COOR1、-CON(R6)2、-CH2OR5 或 -CH(OR7)CH2OR5(其中 R'代表氢原子或 1 至 12 个碳原子的烷基,基团 R6 可以相同或不同,各代表 1 至 4 个碳原子的烷基、或 R7 代表 2 至 12 个碳原子的酰基,R5 如前定义),但当 R3 代表单键时,R4 不代表取代或未取代的苯氧基,这些苯氧基可用于制备 6-酮-
前列腺素衍
生物。