Processes for preparation of 9, 11-epoxy steroids and intermediates useful therein
申请人:G. D. Searle & Company
公开号:US20040067917A1
公开(公告)日:2004-04-08
Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of Formula I
1
wherein:
-A-A- represents the group —CHR
4
—CHR
5
— or —CR
4
═CR
5
—
R
3
, R
4
and R
5
are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, aryloxy,
R
1
represents an alpha-oriented lower alkoxycarbonyl or hydroxyalkyl radical,
-B-B- represents the group —CHR
6
—CHR
7
or an alpha- or beta-oriented group:
2
where R
6
and R
7
are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, and
R
1
and R
9
are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, or R
8
and R
9
together comprise a carbocyclic or heterocyclic ring structure, or R
8
or R
9
together with R
6
or R
7
comprise a carbocyclic or heterocyclic ring structure fused to the pentacyclic D ring.
提供多种新颖的反应方案、新颖的工艺步骤和新颖的中间体,用于合成环氧美斯雷酮和其他I类化合物,其中:-A-A-表示基团—CHR4—CHR5—或—CR4═CR5—R3,R4和R5独立地选自氢、卤、羟基、低级烷基、低级烷氧基、羟基烷基、烷氧基烷基、羟基羰基、
氰、芳氧基,R1表示α取向的低级烷氧羰基或羟基烷基基团,-B-B-表示基团—CHR6—CHR7或α-或β-取向的基团:2其中,R6和R7独立地选自氢、卤、低级烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羰基、烷基、烷氧羰基、酰氧基烷基、
氰、芳氧基,R1和R9独立地选自氢、卤、低级烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羰基、烷基、烷氧羰基、酰氧基烷基、
氰、芳氧基,或R8和R9共同构成一个碳环或杂环结构,或R8或R9和R6或R7共同构成一个与五环D环融合的碳环或杂环结构。