3β-Cyclohexylcholestane was prepared from cholest-5-ene-3β-carboxylic acid and the fact is that the carbanion formed in the Grignard reagent of 3β-chlorocholest-5-ene was β-oriented in reaction with cholestan-3-one, i.e. the conformation at 3-position is retained. Discussions were also made on the structure of 3β-cyclohexylcholestan-3α-ol and 3-cyclohexylcholest-2-ene.
3β-环己基胆甾烷由胆甾-5-烯-3β-
羧酸制得,事实证明,3β-
氯代胆甾-5-烯的
格氏试剂所形成的碳负离子与胆甾烷-3-酮反应时,是β-取向的,即3位的构型保持不变。同时也对3β-环己基胆甾烷-3α-醇及3-环己基胆甾-2-烯的结构进行了讨论。