Mild and Expeditious Synthesis of Sulfenyl Enaminones of l -α-Amino Esters and Aryl/Alkyl Amines through NCS-Mediated Sulfenylation

Journal Article (Journal Article)

Sulfenylation or selenylation of enaminones of l-α-amino esters requires mild reaction conditions due to the presence of a racemization-prone chiral center and reactive side chains. An N-chlorosuccinimide (NCS)-mediated methodology has been developed for rapid sulfenylation of enaminones of l-α-amino esters and aryl/alkyl amines at room temperature in open air under metal-free conditions. Enaminones of l-α-amino esters bearing aliphatic, aromatic, and heterocyclic side chains react efficiently with diverse aryl/alkyl/heteroaryl thiols (R1SH) in the presence of NCS to afford a library of biologically important sulfenyl enaminones in good-to-excellent yields (71-90%). Under similar reaction conditions, the enaminones also react with benzeneselenol to produce selenyl enaminones in good yield (73-83%). The NCS-mediated pathway generates sulfenyl chloride (R1SCl) as an intermediate which leads to rapid sulfenylation of enaminones through cross-dehydrogenative coupling (CDC) under mild reaction conditions.

Full Text

Duke Authors

Cited Authors

  • Mukherjee, S; Pramanik, A

Published Date

  • December 14, 2021

Published In

Volume / Issue

  • 6 / 49

Start / End Page

  • 33805 - 33821

Electronic International Standard Serial Number (EISSN)

  • 2470-1343

Digital Object Identifier (DOI)

  • 10.1021/acsomega.1c05058

Citation Source

  • Scopus