Copper-Catalyzed Highly Enantioselective Cyclopentannulation of Indoles with Donor−Acceptor Cyclopropanes

Hu Xiong, Hao Xu, Saihu Liao, Zuowei Xie, and Yong Tang 

 J. Am. Chem. Soc., 2013, 135 (21), pp 7851–7854 

DOI: 10.1021/ja4042127