Tetrahedron Letters

An efficient transformation of ethers to N, N′-disubstituted ureas in a Ritter type reaction

V Panduranga, VV Sureshbabu

Index: Panduranga, Veladi; Basavaprabhu; Sureshbabu, Vommina V. Tetrahedron Letters, 2013 , vol. 54, # 8 p. 975 - 979

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Citation Number: 9

Abstract

A simple, mild, and an alternative protocol for the preparation of N, N′-disubstituted ureas from readily available ethers and cyanamides as starting materials is described. The protocol explores the reactivity of ether in a Ritter type reaction with cyanamide in the presence of BF3· Et2O and resulting in the formation of N, N′-disubstituted urea. Divinyl ether as well as MTBE (methyl tert-butyl ether) can be employed as ether components to ...