乙烯基乙醚 、
1,2,3,4aα,4b,5,6,7,8,8aα,9,10,10a-tetradecahydro-7β-methoxy-4bβ,8α-dimethyl-10aβ-<(benzyloxy)methyl>-2-oxo-10α-phenanthrenol 在
溴 、
N,N-二甲基苯胺 作用下,
生成 (4aR,4bS,7S,8S,8aS,10R,10aS)-10a-Benzyloxymethyl-10-((R)-2-bromo-1-ethoxy-ethoxy)-7-methoxy-4b,8-dimethyl-dodecahydro-phenanthren-2-one 、 (4aR,4bS,7S,8S,8aS,10R,10aS)-10a-Benzyloxymethyl-10-((S)-2-bromo-1-ethoxy-ethoxy)-7-methoxy-4b,8-dimethyl-dodecahydro-phenanthren-2-one