苯乙烯 、
3-(1-(phenylsulfonyl)-1H-indol-3-yl)propanal 在
disodium hydrogenphosphate 、 (2R,5R)-2-tert-butyl-3,5-dimethylimidazolidin-4-one trifluoroacetic acid salt 、 iron trisphenanthroline trishexafluoroantimonate 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
生成
(1R,3R)-1-phenyl-9-(phenylsulfonyl)-2,3,4,9-tetrahydro-1H-carbazole-3-carbaldehyde 、 1-phenyl-9-(phenylsulfonyl)-2,3,4,9-tetrahydro-1H-carbazole-3-carbaldehyde