Friedel-Crafts Reaction of Indoles with Nitroalkenes Catalyzed by Yb(OTf) 3
CHEN Yong-Cheng, CHEN Yuan-Yuan, JIE Zheng-Feng, WANG Wen-Ping
Chin. J. Org. Chem. . 2011, (10): 1672 -1677 .