Interrupting Base-Mediated Benzofuran Ring Transformation with Michael Acceptors

J Org Chem. 2017 Sep 15;82(18):9816-9823. doi: 10.1021/acs.joc.7b01267. Epub 2017 Aug 29.

Abstract

A simple two-stage approach for the synthesis of 3-(2-arylbenzofuran-3-yl)propanoates and propanamides has been developed employing simple acrylates and acrylamides and readily available 3-aroylbenzofurans. The key step of this process involves a base-mediated ring opening of the 3-aroylbenzofurans and subsequent Michael addition of the resulting 1,3-dicarbonyl intermediate with acrylate/acrylamide, followed by the deformylation in one-pot. The resulting products undergo an acid-mediated dehydrative cyclization to arrive at these targets.

Publication types

  • Research Support, Non-U.S. Gov't