Author/Authors :
Chen، نويسنده , , Liang-Yeu and Li، نويسنده , , Sie-Rong and Chen، نويسنده , , Po-Yuan and Tsai، نويسنده , , Ian-Lih and Hsu، نويسنده , , Chia-Ling and Lin، نويسنده , , Hsin-Ping and Wang، نويسنده , , Tzu-Pin and Wang، نويسنده , , Eng-Chi، نويسنده ,
Abstract :
Utilization of a novel carbanion-olefin intramolecular 6-endo-trig cyclization reaction to provide 2-aroyl-3,4-dihydro-2H-benzopyrans is described. Through a sequence of a Wittig reaction, O-alkylation, and carbanion-olefin intramolecular cyclization, salicylaldehydes were converted into a series of new 2-aroyl-3,4-dihydro-2H-benzopyrans in two steps or in one-pot reaction.
