A comparative study of solution phase as well as solvent free microwave assisted syntheses of 3-benzothiazole/isoxazole substituted 2-styryl-4(3H)-quinazolinones

Abstract

An optimization of the reaction conditions in solvent free and solution phase microwave assisted synthesis of 2-styryl-4(3H)-quinazolinone derivatives having substituted benzothiazole/5-tertbutylisoxazole at the 3 rd position is discussed. In solvent free reactions acidic alumina was used as a solid support, while a mixture of DMF and pyridine was used in solution phase synthesis. A comparative study of yield and reaction time for both the optimized method revealed that the solution phase microwave irradiation gave better results than solvent free method.