3,3-Ethylenedioxy-17α-hydroxy-androst-5-ene-17β-carbonitrile 在
吡啶 、
氯化亚砜 作用下,
反应 2.0h,
以39%的产率得到(8R,9S,10R,13S,14S,17R)-17-cyano-10,13-dimethyl-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-yl hydrogen sulfite