Achieving functional group diversity in parallel synthesis: solution-phase synthesis of a library of ureas, carbamates, thiocarbamates, and amides using carbamoylimidazolium salts
作者:Justyna A. Grzyb、Robert A. Batey
DOI:10.1016/j.tetlet.2008.06.096
日期:2008.9
A convenient protocol for the parallelsolution-phasesynthesis of a library of thiocarbamates, ureas, carbamates, and amides from carbamoylimidazolium salts has been developed. The crystalline carbamoylimidazolium salts are readily synthesized from secondary amines, CDI and iodomethane, and act as stable carbamoylation reagents. A common set of reaction conditions and a straightforward non-chromatographic
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.