N-hydroxypyridine-2(1H)-thione derivatives of carboxylic acids as activated esters. Part II. Applications in peptide synthesis
作者:Derek H.R. Barton、J. Albert Ferreira
DOI:10.1016/0040-4020(96)00488-7
日期:1996.7
The N-hydroxypyridine-2(1H)-thione derivatives of two urethane-protected α-amino acids readily reacted with free α-amino acid esters or the corresponding benzenesulfenamides to give simple dipeptides in reasonable yields. The benzenesulfenamides are the reagents of choice since they allowed for neutral reaction conditions and exhibited superior reactivity in sterically demanding instances. The atom-economical