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
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
Novel Tetrahydro-1H-Pyrido[4,3-b] Indole Derivatives as CB1 Receptor Ligands
申请人:Cheng Yun-Xing
公开号:US20100113502A1
公开(公告)日:2010-05-06
Compounds of formulae I, or pharmaceutically acceptable salts thereof: wherein R
1
, R
2
and R
3
are as defined in the specification as well as salts and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.