Yanpeng Xing, Binyu Cheng, Jing Wang
Aug 28, 2014
Citations
0
Influential Citations
37
Citations
Journal
Organic letters
Abstract
3-Aminopyrazoles and 4-iminopyrimidines were efficiently prepared via copper-catalyzed three-component reactions of butadiynes, sulfonylazides, and hydrazides or imidamides. The reactions were regioselectively approached via the formation of a β-alkynyl-N-sulfonyl ketenimine intermediate which represented a new and effective 1,3-dielectrophilic equivalent in organic synthesis.