[(Z)-2-溴乙烯基]苯 、
((10R,13S,17S)-17-Hydroxy-10,13-dimethyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-propynoic acid methyl ester 在
palladium diacetate 、
三(邻甲基苯基)磷 三正丁胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以80%的产率得到(10R,13S,17R)-10,13-dimethyl-3'-[(E)-2-phenylethenyl]spiro[2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17,5'-furan]-2',3-dione