(1R,4aR,7S,8S,10aR)-8-Hydroxy-1,4a,7-trimethyl-7-vinyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydro-phenanthrene-1-carboxylic acid methyl ester 在
三氟化硼乙醚 作用下,
以
甲苯 为溶剂,
生成
<1R-(1α,4aβ,4bα,7β,9α,10aα)>-7-Ethenyl-1,2,3,4,4a,4b,5,6,7,9,10,10a-dodecahydro-9-hydroxy-1,4a,7-trimethyl-1-phenanthrencarbonsaeure-methylester 、
、