Stereoselective synthesis of bio-hybrid amphiphiles of coumarin derivatives by Ugi–Mannich triazole randomization using copper catalyzed alkyne azide click chemistry
摘要:
An efficient synthesis of ester-triazole-amide amphiphiles of coumarin derivatives by triazole randomization based on click approach is described. Twenty-five small peptide azides were synthesized using Ugi or alternate Mannich-type multi-component reactions. The new azides were then used for the triazole randomization of alkyne functionalized coumarin ester under CuAAC conditions. Sixty-five new peptide bio-hybrids are obtained in near quantitative yield with high regio and stereoselectivity. (C) 2012 Elsevier Ltd. All rights reserved.
A novel green synthesis of α/β-amino acid functionalized pyrimidinone peptidomimetics using triazole ligation through click-multi-component reactions
作者:Biny Balan、D. Bahulayan
DOI:10.1016/j.tetlet.2013.11.002
日期:2014.1
The protocol involves two synthetic steps with an initial solvent-free and catalyst-free synthesis of propargylated dihydropyrimidinone precursors using Biginelli condensations. The subsequent cycloaddition reactions of pyrimidinone alkynes with small peptide like azides prepared from Ugi or alternate Mannich type multi-component reactions afforded the triazole decorated pyrimidinone peptide conjugates