(E)-3-(4-Oxo-butoxy)-acrylic acid (2R,3S,5S,8R,9S,10S,13R,14S,17R)-17-((R)-1,5-dimethyl-hexyl)-10,13-dimethyl-3-phenyl-hexadecahydro-cyclopenta[a]phenanthren-2-yl ester 在
偶氮二异丁腈 、
三正丁基氢锡 作用下,
以
苯 为溶剂,
反应 8.0h,
生成 ((2R,3R)-3-Hydroxy-tetrahydro-pyran-2-yl)-acetic acid (2S,3R,5R,8S,9R,10R,13S,14R,17S)-17-((S)-1,5-dimethyl-hexyl)-10,13-dimethyl-3-phenyl-hexadecahydro-cyclopenta[a]phenanthren-2-yl ester 、 (3aS,7aS)-Hexahydro-furo[3,2-b]pyran-2-one 、 (3aR,7aR)-hexahydrofuro[3,2-b]pyran-2-one