Hydrotalcite: recyclable, novel heterogeneous catalyst for facile, environmentally benign and high yielding multi-component synthesis and mechanistic study under solvent free conditions†
Abstract
The synthesis of the 4H-pyrimido[2,1-b][1,3]benzothiazole (1a–1h), 1,2,4-triazoloquinazolines (2a,2b), octahydroquinazolinones (3a,3b) and fused thiazolo[2,3-b]quinazolinone (4a,4b) by multicomponent reactions using