Visible-Light-Induced Intermolecular Trifluoromethyl Heteroarylation of Vinyl Ethers for the Syntheses of β-Trifluoromethyl Alkyl Thiochromones

J Org Chem. 2023 Jul 7;88(13):9283-9292. doi: 10.1021/acs.joc.3c00842. Epub 2023 Jun 22.

Abstract

Herein, we reported a transition-metal-free three-component trifluoromethyl heteroarylation of vinyl ethers under visible light irradiation. This protocol proceeded through a radical addition/cyclization sequence which hinged on the intrinsic nucleo/electrophilic reactivity of both the radicals, alkene, and alkynones, allowing β-trifluoromethyl alkyl thiochromones furnished with high efficiency and excellent functional group tolerance. By virtue of this procedure, three distinct chemical bonds including C(sp2)-C(sp3), C(sp3)-C(sp3), and C(sp2)-S have been successively forged in a single pot.

MeSH terms

  • Cyclization
  • Ethers
  • Light
  • Metals*
  • Vinyl Compounds*

Substances

  • vinyl ether
  • Vinyl Compounds
  • Metals
  • Ethers