Convenient method for the functionalization of the 4- and 6-positions of the androgen skeleton
作者:Daniel Morton、Allison R. Dick、Debashis Ghosh、Huw M. L. Davies
DOI:10.1039/c2cc31973j
日期:——
The preparation and reactivity of steroidal vinyldiazo compounds is reported, providing a convenient, substituent tolerant, chemo- and stereoselective entry into 4- and 6-substituted androgen analogues from a common precursor. Under dirhodium catalysis, O–H insertion occurs at the carbenoid site, leading to 4-substituted steroids, but under silver catalysis, O–H insertion occurs at the vinylogous position, leading to 6-substituted steroids.
本文报道了甾体乙烯基重氮化合物的制备和反应活性,提供了一种便捷、对取代基容忍、化学选择性和立体选择性的方法,从共同前体合成4-和6-取代的雄激素类似物。在双铑催化下,O–H插入发生在卡宾位点,生成4-取代的甾体,而在银催化下,O–H插入发生在乙烯位点,生成6-取代的甾体。