Logo image
DMTSF-mediated electrophilic cyclization for the synthesis of 3-thiomethyl-substituted benzo[b]furan derivatives
Journal article   Peer reviewed

DMTSF-mediated electrophilic cyclization for the synthesis of 3-thiomethyl-substituted benzo[b]furan derivatives

Declan T. McGurk, Langley E. Knighten, Maria Jose Pena Bu, Faith I. Christofferson, Sierra D. Rich, Prerna Jasmine Masih and Tanay Kesharwani
Organic & biomolecular chemistry, Vol.23(8), pp.1735-1736
02/28/2025

Metrics

17 Record Views

Abstract

Benzofuran is an important backbone for molecules that make up several pharmaceuticals, herbicides/pesticides, and organo-electronics. An environmentally benign dimethyl(methylthio)sulfonium tetrafluoroborate salt was used as an electrophile to induce cyclization of o-alkynyl anisoles to form 2,3-disubstituted benzofurans. The cyclization is performed at ambient reaction conditions, only takes 12 hours to get excellent yields, and shows a high tolerance for various substituted alkynes. Also, a trimethyl group obtained after the cyclization reactions allows for a cascade cyclization, and an alkyne is used in the reaction to create a thieno[3,2-b]benzofuran core structure.

Details

Logo image