SYNTHESIS OF FLAVONES (2-ARYL-4H-CHROMEN-4-ONE) BY CYCLOCONDENSATION OF O-HYDROXYPHENYL ARYL-1, 3-PROPANEDIONES USING SILICA SULPHURIC ACID, AN EFFICIENT REUSABLE HETEROGENEOUS ACIDIC MEDIA.

摘要

The present invention relates to the synthesis of flavones (2-aryl-4H-chromen-4-one) by cyclocondensation of o-hydroxyphenyl aryl-1, 3-propanediones using silica sulphuric acid. The main object of the present invention is to synthesize flavones via a green procedure, in good yields and at room temperature by using heterogeneous reusable acidic media, silica sulphuric acid.