Oxidative cyclization of acyclic ureas with bis(trifluoroacetoxy)iodobenzene to generate N-substituted 2-benzimidazolinones
作者:Arthur G. Romero、William H. Darlington、E.Jon Jacobsen、John W. Mickelson
DOI:10.1016/0040-4039(96)00291-2
日期:1996.4
2-benzimidazolinones from secondary aromaticamines is presented. Sequential treatment of a secondary aromaticamine with phosgene and methoxylamine afforded an acyclic 3-substituted 3-aryl-1-methoxy urea. Brief exposure of this urea to bis(trifluoroacetoxy)iodobenzene induced an oxidative cyclization to the ortho-position of the benzene ring, resulting in the formation of a 3-substituted 1-methoxy-2-benzimidazloinone