Na no silica phosphoric acid as an efficien t eco-frie ndly catalyst for synthesis of ar yl ۱۴H-dib enzo[a,j] xanthene s in therm al and solvent-free con ditions

Nanoparticles such as silica have been widely used to reinforce polymer systems an d fabricate nanocomposite[۱,۲]. Silica phosph oric acid (SP A) is a solid acid whic h can be us ed for diffe rent organic functional group transformations either as rea gent or as catalyst under heterogeneous conditions [۳]. In continuatio n of our in vestigation about application of solid acids, h ere we wish to report a new appl ication of s ilica phosphoric acid (SPA) for t he synthesis of ۱۴H di benzo[a,j]xanthenes de rivatives in thermal and solvent-fr ee conditions. First sili ca phosphoric acid was prepared. B y using this catalyst, various aromatic aldehy de reaction with ȕ-na phthol and converted to their corresponding aryl ۱۴H -dibenxo[a,j] xanthenes in good to excellent y elds.

کلیدواژه ها:

Xanthenes ، Aldehy de ، Dibenzo [a ، j]xanthen es ، Nano silica phospho ricacid