N-{1-[(3S,8R,9S,10R,13S,14S)-3-Methoxymethoxy-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-cyclopenta[a]phenanthren-(17E)-ylidene]-ethyl}-formamide 在
吡啶 、
lead(IV) acetate 、
甲酸 、
乙酸酐 作用下,
以
乙酸乙酯 、
苯 为溶剂,
生成 Acetic acid (3S,8R,9S,10R,13S,14S,17R)-17-(1-isocyanato-vinyl)-3-methoxymethoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester