PROCESSES FOR PREPARATION OF 9,11 EPOXY STEROIDS AND INTERMEDIATES USEFUL THEREIN
申请人:Ng S. John
公开号:US20070060746A1
公开(公告)日:2007-03-15
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 —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:
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
8
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.
提供了多种新颖的反应方案、新颖的过程步骤和新颖的中间体,用于合成环氧甲基瑞酮和其他式I化合物,其中:-A-A-代表基团—CHR4—CHR5—或—CR4═CR5—,——R3、R4和R5分别选择自氢、卤素、羟基、低级烷基、低级烷氧基、羟基烷基、烷氧基烷基、羟基羧基、氰基、芳氧基等组成的群;R1代表α-定向的低级烷氧基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分别选择自氢、卤素、低级烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羧基、烷基、烷氧基羰基、酰氧基烷基、氰基、芳氧基等组成的群;R8和R9分别选择自氢、卤素、低级烷氧基、酰基、羟基烷基、烷氧基烷基、羟基羧基、烷基、烷氧基羰基、酰氧基烷基、氰基、芳氧基,或R8和R9一起构成一个碳环或杂环结构,或R8或R9与R6或R7一起构成一个与五环D环融合的碳环或杂环结构。