1,1-diphenylprop-2-en-1-ol 、
(1R,4aS,10aR)-1,4a-Dimethyl-7-triphenylsilanyloxy-1,2,3,4,4a,5,6,9,10,10a-decahydro-phenanthrene-1-carboxylic acid methyl ester 在
zinc dibromide 作用下,
以
硝基甲烷 、
二氯甲烷 为溶剂,
以15%的产率得到methyl (1R,4aS,4bR,10aR)-4b-(3,3-diphenylprop-2-enyl)-1,4a-dimethyl-7-oxo-2,3,4,5,6,9,10,10a-octahydrophenanthrene-1-carboxylate