NHC-Catalyzed [2 + 4] Annulation of Alkynyl Ester with Chalcone
作者:Fangfang Lu、Yangxu Chen、Xue Song、Chenxia Yu、Tuanjie Li、Kai Zhang、Changsheng Yao
DOI:10.1021/acs.joc.2c00022
日期:2022.5.20
NHC-catalyzed [2 + 4] cyclization of alkynyl ester with α,β-unsaturated ketone to form a pyran scaffold was developed successfully. The cheap and easily available starting materials, mild reaction conditions, moderate to excellent yields, and high atom economy make this strategy attractive for the syntheses of highly substituted 4H-pyran derivatives.