A facile and efficient synthesis of tetrahydrobenzo[b]pyran using FeCl3 supported by mesoporous silicate as efficient and recyclable catalyst

A simple, efficient, and environmentally benign protocol for the synthesis of 4H-chromene derivatives was developed using recoverable mesoporous silica nanoparticles as a catalyst. The 4H-chromene derivatives were obtained in excellent yields by three component reaction of an aldehyde, malononitrile, and dimedone in ethanol at 60 °C.

کلیدواژه ها:

Malononitrile ، Multicomponent reactions ، 4H-chromene derivatives ، Mesoporous silica