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Tetrabutylammonium iodide-catalyzed oxidative coupling of enamides with sulfonylhydrazides: synthesis of β-keto-sulfones†
Yucai Tang,Ye Zhang,Kaifeng Wang,Xiaoqing Li,Xiangsheng Xu,Xiaohua Du
Organic & Biomolecular Chemistry Pub Date : 05/19/2015 00:00:00 , DOI:10.1039/C5OB00742A
Abstract

A facile synthetic route towards pharmaceutically interesting β-keto-sulfone derivatives by tetrabutylammonium iodide (TBAI)/tert-butyl hydroperoxide (TBHP) mediated oxidative coupling of readily prepared enamides with economical sulfonylhydrazides is described. The corresponding β-keto-sulfone compounds were obtained in moderate to good yields. The present method is metal-free and base-free and shows tolerance to a variety of functional groups.

Graphical abstract: Tetrabutylammonium iodide-catalyzed oxidative coupling of enamides with sulfonylhydrazides: synthesis of β-keto-sulfones
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