Simple and ecofriendly synthesis of dihydropyrimidinones (thiones), dihydropyridines, and pyridines using 3-formylchromones as substrates assisted by a recyclable Preyssler heteropolyacid
作者:Laura M. Sanchez、Gustavo Pasquale、Ángel Sathicq、Diego Ruiz、Jorge Jios、Andrea L. Ferreira de Souza、Gustavo P. Romanelli
DOI:10.1002/hc.21340
日期:2016.9
Several dihydropyrimidinones/thiones, 1,4-dihydropyridines, and pyridine derivatives were prepared in very good yields and purity values. The corresponding reactions were carried out by employing a bulk Preysslerheteropolyacid H14[NaP5W29MoO110] as an efficient and recyclable catalyst. The preparation of pyridine derivatives was carried out not through a usual procedure, i.e., the opening of the γ-pyrone