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Hypervalent iodine(iii) promoted tandem reaction of o-fluoroanilines with formamides to construct 2-aminobenzoxazoles†
Lipeng Long,Jieyan Wang,Xin Li,ShunFeng Peng,Liang Qiao,Guotian Luo,Zhengwang Chen
Organic Chemistry Frontiers Pub Date : 03/17/2022 00:00:00 , DOI:10.1039/D2QO00049K
Abstract

A simple and practical synthesis of 2-aminobenzoxazoles has been developed from commercially available o-fluoroanilines, and formamides. This process can be performed in the absence of metal catalysts with high levels of functional group tolerance. Hypervalent iodine(III) was both an oxidant and a Lewis acid for this reaction. A variety of substituents can be introduced into each position of the benzoxazole backbone (C-4 to C-7), providing handles for further elaboration.

Graphical abstract: Hypervalent iodine(iii) promoted tandem reaction of o-fluoroanilines with formamides to construct 2-aminobenzoxazoles
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