Hao-zhen Bu, Hang Li, Wen‐Feng Luo
Dec 30, 2019
Citations
0
Influential Citations
28
Citations
Journal
Organic letters
Abstract
A novel Brønsted acid-catalyzed reaction of alkynyl thioethers with o-hydroxybenzyl alcohols via an unexpected formal [4 + 2] annulation has been developed. This metal-free protocol leads to the facile and practical synthesis of valuable polysubstituted 2H-chromenes in mostly good to excellent yields under mild reaction conditions and features a wide substrate scope and excellent functional group tolerance.