Differentiation between similarly reactive sites in molecules represents an ongoing challenge of organic synthesis. Herein we described one kind of versatile reagents, N-thiohydroxy succinimide esters (NTSEs), serving as both acyl and acylthio surrogates for the diverse synthesis of ketones, thioesters, amides, and acyl disulfides by selective cleavage of similarly reactive C–S and N–S bonds.
Klimko, Yu. E.; Isaev, S. D.; Yurchenko, A. G., Russian Journal of Organic Chemistry, 1994, vol. 30, # 11, p. 1776 - 1783
作者:Klimko, Yu. E.、Isaev, S. D.、Yurchenko, A. G.
DOI:——
日期:——
In Situ Carboxyl Activation Using a Silatropic Switch: A New Approach to Amide and Peptide Constructions
作者:Wenting Wu、Zhihui Zhang、Lanny S. Liebeskind
DOI:10.1021/ja2065158
日期:2011.9.14
The novel reactivity of O-silylthionoesters with amine nucleophiles to generate oxoamides (rather than thioamides) is described. A straightforward first-generation trimethylsilylation protocol using bistrimethylsilylacetamide (BSA) combined with the unique reactivity of the O-silylthionoesters toward 1 degrees and 2 degrees amines to generate oxoamides provides the simplest means of activating a thiol acid for peptide bond formation at neutral pH. Excellent stereoretention is observed.