The triazine-based functionalized HY zeolite nanoparticles have been employed for synthesis of the pharmaceutically valuable 1, 4-dihydropyrano [2, 3-c] pyrazole and tetrahydrobenzo[b]pyran derivatives as a novel, versatile and efectual heterogeneous catalyst and characterized by FT-IR, XRD, BET, FE-SEM, TGA, EDX and MAP. The reactions were carried out under mild and green condition and short reaction times with high yield and easy workup process. The heterogeneous nanocatalyst can be simply recovered and reused for at least ive times without considerable loss of activity
