Issue 5, 2020

The synthesis of fluorescent benzofuro[2,3-c]pyridines via palladium-catalyzed heteroaromatic C–H addition and sequential tandem cyclization

Abstract

A Pd-catalyzed tandem reaction of 2-(cyanomethoxy)chalcones with thiophenes through direct C–H addition and sequential intramolecular conjugate addition/cyclization/aromatization provides a diverse range of 3-aryl-1-(thiophen-2-yl)benzofuro[2,3-c]pyridines. A representative product was assessed as a ratiometric fluorescent probe for Hg2+. This chemistry could also be applied to the synthesis of other fused ring systems.

Graphical abstract: The synthesis of fluorescent benzofuro[2,3-c]pyridines via palladium-catalyzed heteroaromatic C–H addition and sequential tandem cyclization

Supplementary files

Article information

Article type
Research Article
Submitted
18 Dec 2019
Accepted
27 Jan 2020
First published
10 Feb 2020

Org. Chem. Front., 2020,7, 756-762

The synthesis of fluorescent benzofuro[2,3-c]pyridines via palladium-catalyzed heteroaromatic C–H addition and sequential tandem cyclization

W. Xiong, Z. Chen, Y. Shao, R. Li, K. Hu and J. Chen, Org. Chem. Front., 2020, 7, 756 DOI: 10.1039/C9QO01491H

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