tert-butyl (E)-(1''S,3a''R,7a''S)-3-[2'-(1''-tert-butoxy-7a''-methyl-2'',3'',3a'',6'',7'',7a''-hexahydro-1''H-inden-5''-yl)-5'-oxocyclohex-1'-enyl]acrylate                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 14.0h,
                                                                                                                以51%的产率得到tert-butyl (7R,8R,13S,14R,17S)-17-tert-butoxy-13-methyl-3-oxo-2,3,6,7,8,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-7-carboxylate