(1H-吲哚-2-基)-二苯基-甲醇 、
methyl 3-(1,1,1-trifluoro-2-hydroxy-4-phenylbut-3-yn-2-yl)-1H-indole-5-carboxylate 在
(R)-3,3'-bis[3,5-di(trifluoromethyl)phenyl]-5,5',6,6',7,7',8,8'-octahydro-1,1'-binaphthyl-2,2'-diylphosphoric acid 作用下,
以
六氟苯 为溶剂,
以72 %的产率得到methyl-(R)-5b,11,11-triphenyl-12-(trifluoromethyl)-5,5b,10,11-tetrahydropentaleno[1,2-b:5,6-b'] diindole-2-carboxylate