申请人:ASKA Pharmaceutical Co., Ltd.
公开号:US10815268B2
公开(公告)日:2020-10-27
Provided is a process for producing a compound, which has an oxo group specifically introduced on the 15-position of a steroid skeleton and which is useful as an intermediate, with a high yield without complicated steps. A compound represented by the formula (2) is allowed to react with an oxidant (e.g., a hypervalent iodine compound) and a co-oxidant (e.g., a peroxide) to produce a 15-oxosteroid compound represented by the formula (1), which is useful as an intermediate:
wherein R1 to R3 are the same or different and each represent a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, or a haloalkoxy group, R4 represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an acyl group, or an alkoxycarbonyl group, R5 represents a hydrogen atom, an alkyl group, or an acyl group, R6 represents a hydrogen atom, an alkyl group, an acyl group, or a sulfonyl group, X represents an oxygen atom (O) or a methylene group (CH2).
本发明提供了一种化合物的生产工艺,该化合物在甾体骨架的 15 位上特别引入了一个氧代基团,可用作中间体,产量高,无需复杂步骤。让式 (2) 所代表的化合物与氧化剂(如高价碘化合物)和助氧化剂(如过氧化物)反应,生成式 (1) 所代表的 15-氧甾体化合物,该化合物可用作中间体:
其中 R1 至 R3 相同或不同,各自代表卤素原子、烷基、卤代烷基、烷氧基或卤代烷氧基,R4 代表氢原子、卤素原子、烷基、烷氧基、酰基、R5 代表氢原子、烷基或酰基,R6 代表氢原子、烷基、酰基或磺酰基,X 代表氧原子 (O) 或亚甲基 (CH2)。