Catalytic chemical amide synthesis at room temperature: one more step toward peptide synthesis

J Org Chem. 2015 May 1;80(9):4532-44. doi: 10.1021/acs.joc.5b00378. Epub 2015 Apr 14.

Abstract

An efficient method has been developed for direct amide bond synthesis between carboxylic acids and amines via (2-(thiophen-2-ylmethyl)phenyl)boronic acid as a highly active bench-stable catalyst. This catalyst was found to be very effective at room temperature for a large range of substrates with slightly higher temperatures required for challenging ones. This methodology can be applied to aliphatic, α-hydroxyl, aromatic, and heteroaromatic acids as well as primary, secondary, heterocyclic, and even functionalized amines. Notably, N-Boc-protected amino acids were successfully coupled in good yields with very little racemization. An example of catalytic dipeptide synthesis is reported.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amides / chemical synthesis*
  • Amides / chemistry
  • Catalysis
  • Dipeptides / chemical synthesis*
  • Dipeptides / chemistry
  • Molecular Structure
  • Temperature*

Substances

  • Amides
  • Dipeptides