Metal-Free Synthesis of Selanyl-Substituted Chromenones via Selanylation­/Cyclization of Alkynyl Aryl Ketones

Abstract

A variety of 2-substituted 3-selanyl-chromenones are readily prepared through a cascade selanylation/cyclization of alkynyl aryl ketones with sulfonoselenoates. This transformation is performed under metal-free conditions and does not require an additional oxidant. It also has the advantage of broad functional group tolerance and scalability.