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.
Key words
selanylation - 2-substituted 3-selanyl-chromenones - alkynyl aryl ketones - sulfonoselenoates - metal-free