Synthesis of tetrahydrobnzopyran in the nanoporous acid catalyst SBA-15

In this work, SBA-15 is used as a nano catalyst in the one-pot Biginelli-like reaction between dimedone, malononitrile and aromatic aldehydes in order to produce the corresponding Benzopyran derivatives in ethanol media, and avoid the usage of hazardous organic solvent. The catalyst exhibits remarkable reactivity and is reusable. The experimental conditions have been thoroughly optimized and established, allowing significant rate enhancements and excellent yields and enviromentally benign in green chemistry.

Keywords:

Biginelli-like reaction , ethanol media , Lewis acid , SBA-15 , Tetrahydrobenzopyran