Continuous Flow Synthesis of α-Trifluoromethylthiolated Esters and Amides from Carboxylic Acids: a Telescoped Approach

J Org Chem. 2021 Oct 15;86(20):14207-14212. doi: 10.1021/acs.joc.1c01270. Epub 2021 Jul 27.

Abstract

A continuous flow approach to access α-trifluoromethylthiolated esters and amides using commercially available arylacetic acids and N-(trifluoromethylthio)phthalimide as the electrophilic reagent is described. The experimental protocol involves the in-flow conversion of the carboxylic acid into N-acylpyrazole followed by the α-trifluoromethylthiolation in a PTFE coil reactor and final reaction with primary or secondary amines, or alcohols, to afford in a telescoped process α-substituted SCF3 amides and esters, respectively, in good overall yield and short reaction times.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alcohols
  • Amides*
  • Carboxylic Acids*
  • Esters
  • Indicators and Reagents

Substances

  • Alcohols
  • Amides
  • Carboxylic Acids
  • Esters
  • Indicators and Reagents