Tetrahedron Letters p. 5834 - 5837 (2010)
Update date:2022-08-03
Topics:
Fu, Shaomin
Lian, Xiaoyan
Ma, Tongmei
Chen, Wenhua
Zheng, Meifang
Zeng, Wei
Several Lewis acids were investigated as promoters in the intermolecular or intramolecular direct N-acylation reaction of sulfonamides using carboxylic ester as an acylating agent. TiCl4 was found to possess the highest activity and enhanced efficiently sulfonamide to form N-acylsulfonamides under optimized conditions. This method provides a novel approach to make N-acylsulfonamides from ester via an easy work-up procedure.
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