STEROIDS: II. THE STEREOCHEMISTRY OF THE ADDITION OF GRIGNARD REAGENTS TO 12-KETOSTEROIDS
作者:R. Nagarajan、George Just
DOI:10.1139/v61-161
日期:1961.6.1
The action of methylmagnesiumiodide on 3α,20α-diacetoxypregnan-12-one (IIa) led to the formation of the epimeric 12-methyl-12-hydroxypregnanes III and V, in which the 12α-hydroxy-12β-methyl isomer III predominated.Infrared measurements on the corresponding 12-hydroxy-12-methylpregnane-3,20-diones VI and IV permitted unambiguous assignment of configuration at C12.The pregnanedione IV was transformed
甲基碘化镁对 3α,20α-diacetoxypregnan-12-one (IIa) 的作用导致差向异构 12-methyl-12-hydroxypregnanes III 和 V 的形成,其中 12α-羟基-12β-甲基异构体 III 占主导地位. 对相应的 12-羟基-12-甲基孕烷-3,20-二酮 VI 和 IV 的红外测量允许明确指定 C12 的构型。孕二酮 IV 转化为 12β-羟基-12α-甲基孕酮。