A One-pot Multi-component Synthesis of Dihydropyrimidinone/Thione and Dihydropyridine Derivatives via Biginelli and Hantzsch Condensations using t-BuOK as a Catalyst Under Solvent-free Conditions

The synthesis of various substituted Biginelli 3,4-dihydropyrimidinone/thione and Hantzsch 1,4dihydropyridine derivatives has been achieved using a modified procedure in the presence of potassium ter-butoxide (t-BuOK) as a catalyst under solvent-free conditions, in good to excellent yields.