Umpolung reactivity in amide and peptide synthesis
作者:Bo Shen、Dawn M. Makley、Jeffrey N. Johnston
DOI:10.1038/nature09125
日期:2010.6
which the polarities of the two reactants are reversed (German, umpolung) during carbon–nitrogen bond formation relative to traditional approaches. The use of nitroalkanes as acyl anion equivalents provides a conceptually innovative approach to amide and peptide synthesis, and one that might ultimately provide for efficient peptide synthesis that is fully reliant on enantioselective methods.
[EN] ENANTIOSELECTIVE SYNTHESIS OF BRIVARACETAM AND INTERMEDIATES THEREOF<br/>[FR] SYNTHÈSE ÉNANTIOSÉLECTIVE DE BRIVARACÉTAM ET DE SES INTERMÉDIAIRES
申请人:CLININVENT RES PVT LTD
公开号:WO2020148787A1
公开(公告)日:2020-07-23
The present invention relates to an improved and economical process for enantioselective synthesis and purification of a novel key intermediate of Brivaracetam. Further, the present invention also relates to a process for the preparation of a chirally pure Brivaracetam of formula I utilizing the said intermediate.
Ammonium Nitrate: A Biodegradable and Efficient Catalyst for the Direct Amidation of Esters under Solvent-free Conditions
作者:Perla Ramesh、Nitin W. Fadnavis
DOI:10.1246/cl.140846
日期:2015.2.5
A simple, metal-free, and environment-friendly procedure is developed for the direct conversion of esters to amides using ammonium nitrate as a catalystundersolvent-freeconditions. Aryls, hetero...