An efficient and modified biginelli one‐pot synthesis of new isoxazole substitted 3,4‐dihydropyrimidin‐2(1H)‐ones and thiones catalyzed by VCl3

An efficient and modified Biginelli one-pot synthesis of new-isoxazole substituted 3,4-dihydropyrimidin-2(1H)-ones and thiones from aromatic aldehydes, ketoamide and urea/thiourea in acetonitrile using VCl3 as the catalyst is described.