Acetic acid (3R,3aR,5R,8S,11bR)-5-methoxy-3a,6-dimethyl-3-((E)-(1R,4R)-1,4,5-trimethyl-hex-2-enyl)-2,3,3a,4,5,7,8,9,10,11b-decahydro-1H-cyclopenta[a]anthracen-8-yl ester 在
碘代三甲硅烷 作用下,
以
乙腈 为溶剂,
反应 24.0h,
以89%的产率得到1(10-> 6)abeo-ergosta-5,7,9,22-tetraen-3α-acetate