1-(prop-2-ynyl)cyclopentanecarbaldehyde 、
7-溴-1-甲基-1H-吲哚 在
silver trifluoromethanesulfonate 作用下,
以
氯仿 为溶剂,
生成 8-bromo-4,9-dimethyl-1,4-bis(7-bromo-1-methyl-1H-indol-3-yl)-1,3,4,9-tetrahydrospiro[carbazole-2,1'-cyclopentane] 、 8-bromo-4,9-dimethyl-1,4-bis(7-bromo-1-methyl-1H-indol-3-yl)-1,3,4,9-tetrahydrospiro[carbazole-2,1'-cyclopentane]