1-[1-[3-(tert-butyldimethylsilyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl]-ethyl]-but-3-enyl-2-hydroxymethylacrylate 在
improved-type Hoveyda-Grubbs catalyst (o-tolyl-type) 作用下,
以
甲苯 为溶剂,
反应 1.5h,
以57%的产率得到6-[1-[3-(tert-butyldimethylsilyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl]-ethyl]-3-hydroxymethyl-5,6-dihydropyran-2-one