[4 + 2] Cyclization of para-Quinone Methide Derivatives with Alkynes

J Org Chem. 2018 Feb 2;83(3):1414-1421. doi: 10.1021/acs.joc.7b02942. Epub 2018 Jan 24.

Abstract

The first cyclization of para-quinone methide derivatives with alkynes was established by utilizing the [4 + 2] reaction of ortho-hydroxyphenyl-substituted para-quinone methides with ynones or benzyne, which efficiently constructed the scaffolds of chromene and xanthene in high yields (up to 88%). This protocol has not only fulfilled the task of developing cyclization reactions of para-quinone methide derivatives but also provided an efficient method for constructing chromene and xanthene scaffolds.

Publication types

  • Research Support, Non-U.S. Gov't