作者:M. Eugenia González-Rosende、Encarna Castillo、Belén Asíns、Rachid Mamouni、José Sepúlveda-Arques
DOI:10.1016/j.tet.2007.06.052
日期:2007.9
The reactivity of a series of sulfonylguanidinoacetamides 2A-E towards amines is reported. Guanidinoacetamides 2A-C, containing the arylsulfonylimino moiety, undergo a facile transamidation to give substituted carboxamides 4A-C, through the imidazolidinone intermediate 3. Acetamide 2D, having a methanesulfonylimino substituent, affords the imidazolidinone 3D and no transamidated carboxamides 4 are detected. In the case of guanidinoacetamide 2E, with a p-nitrobenzenesulfonylimino substituent, a Smiles rearrangement was observed. (c) 2007 Elsevier Ltd. All rights reserved.