فهرست نشریات علمی دسترسی آزاد ایران

In this study, the benzopyrano[3,2-c]chromene-6,8-dione derivatives were synthesized by one-pot multi-component reaction of 1,3-cyclohexanedione, arylaldehydes, and 4-hydroxycoumarin under the solventless condition using Cu(II)-Schiff base/SBA-15 as a reusable heterogeneous catalyst in high yields. These kinds of catalysts are built from mesoporous silica SBA-15 which is covalently anchored with Cu(II)-Schiff base complex. The high yields, simple work-up procedure, reuseability of the catalyst, and environmentally friendly conditions are the main advantages of this method as compared to the other techniques. The products were identified by using1H NMR, mass and IR spectra, which were compared to those reported previously.