Processes for preparation of 3-keto-7alpha-alkoxycarbonyl-delta-4,5- steroids and intermediates useful therein
申请人:G.D. SEARLE & CO.
公开号:EP1223174A3
公开(公告)日:2005-03-16
Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I wherein:-A-A- represents the group -CHR4-CHR5- or -CR4=CR5- R3, R4 and R5 are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, varyloxy;R1 represents an alpha-oriented lower alkoxycarbonyl or hydroxyalkyl radical;-B-B- represents the group -CHR6-CHR7- or an alpha- or beta- oriented group: where R6 and R7 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano and aryloxy; andR8 and R9 are independently selected from the group consisting of hydrogen, hydroxy, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano and aryloxy, or R8 and R9 together comprise a carbocyclic or heterocyclic ring structure, or R8 or R9 together with R6 or R7 comprise a carbocyclic or heterocyclic ring structure fused to the pentacyclic D ring.
提供了多种新颖的反应方案、新颖的工艺步骤和新颖的中间体,用于合成环氧甲基雷诺酮和其他式I化合物,其中:-A-A-代表基团-CHR4-CHR5-或-CR4=CR5-,R3、R4和R5分别选自氢、卤素、羟基、低碳基、低烷氧基、羟基烷基、烷氧基烷基、羟基羰基、氰基、酚氧基;R1代表α-定向的低烷氧羰基或羟基烷基基团;-B-B-代表基团-CHR6-CHR7-或α-或β-定向的基团:其中R6和R7分别选自氢、卤素、低烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羰基、烷基、烷氧基羰基、酰氧基烷基、氰基和芳基;R8和R9分别选自氢、羟基、卤素、低烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羰基、烷基、烷氧基羰基、酰氧基烷基、氰基和芳基,或R8和R9共同构成一个碳环或杂环结构,或R8或R9与R6或R7共同构成一个与五环D融合的碳环或杂环结构。