Reduction of C=C and/or C=O bonds in 5-methyl-19-nor-5β-pregn-9-ene-3,20-dione (1) leads to saturated and unsaturated ketones and hydroxy ketones. The C=C reduction affords mainly 9β,10β and 9α,10β dihydro products. Reaction conditions of partial esterification, hydrolysis and oxidation were elaborated. Several analogues were prepared for the testing of gestagenic and neurosteroidal activities.
5-甲基-19-去氢-5β-孕-9-烯-3,20-二酮(
1)中C=C和/或C=O键的还原会产生饱和和不饱和的酮和羟基酮。C=C的还原主要得到9β,10β和9α,10β二氢产物。详细阐述了部分酯化、
水解和氧化的反应条件。制备了几种类似物用于测试孕激素和神经类
固醇活性。