Green Synthesis of 3,4-Dihydropyrimidinone/Thione Derivatives Using Alumina–Silica-Supported MnO 2 as a Recyclable Catalyst in Ethanol
facile, environmentally friendly one-pot multicomponent protocol for the synthesis of dihydropyrimidinone (DHPM) and dihydropyrimidin(thio)one (DHPMT) derivatives has been developed using alumina-silica-supported MnO2 as a catalyst in ethanol, demonstrating a green chemistry approach. The Biginelli-type reaction be...