Carbamoylimidazolium salts as diversification reagents: an application to the synthesis of tertiary amides from carboxylic acids
作者:Justyna A. Grzyb、Robert A. Batey
DOI:10.1016/j.tetlet.2003.08.026
日期:2003.9
preparation of tertiaryamides from carbamoylimidazolium salts and carboxylic acids is described. The transformation occurs at room temperature and under relatively mild conditions. The carbamoylimidazolium salts are obtained from the reaction of secondary amines with N,N′-carbonyldiimidazole, followed by methylation with methyl iodide. The utility of this reaction was demonstrated in the formation of Weinreb
A new protocol for the formation of carbamates and thiocarbamates using carbamoyl imidazolium salts
作者:Robert A. Batey、Chiaki Yoshina-Ishii、Scott D. Taylor、V. Santhakumar
DOI:10.1016/s0040-4039(99)00302-0
日期:1999.4
Carbamoyl imidazolium salts are demonstrated to act as useful carbamoylation reagents, in reactions with alcohols, phenols, thiols and thiophenols to form carbamates and thiocarbamates under relatively mild conditions. The salts are stable and easily prepared from the corresponding amines using CDI. (C) 1999 Elsevier Science Ltd. All rights reserved.