The development of an ecofriendly procedure for alkaline metal (II) sulfate promoted synthesis of<i>N</i>,<i>N</i>â²-dimethyl substituted (unsubstituted)-4-aryl-3,4-dihydropyrimidones (thiones) and corresponding bis-analogues in aqueous medium: Evaluation by green chemistry metrics
作者:Chhanda Mukhopadhyay、Arup Datta
DOI:10.1002/jhet.283
日期:——
Different alkalinemetal (II) sulfates were used as catalysts for the N,N′-dimethylsubstituted as well as unsubstituted 4-aryl-3,4-dihydropyrimidones (thiones) and their correspondingbis-analogues in aqueousmedium. Among the various salts, MgSO4·7H2O (Epsom salt) proved to be the best catalyst giving the desired products in good to excellent yields. This catalyst enables the construction of a series