In this paper, synthesize tungsten-substituted molybdophosphoric acid (H3PMo7W5O40·24H2O) and impregnated with kaolin clay by wetness impregnation method. The catalytic activity explored for synthesis of 3,4-dihydropyrimidin-2(1H)-ones (DHPM) via Biginelli reaction.

Synthesis of an efficient and novel vanadium substituted molybdotungstophosphoric acid, H 5 PW 6 Mo 4 V 2 O 40 .14H 2 O (VMWP) supported on naturally occurring montmorillonite (nMont) clay by an incipient wetness impregnation technique. The support and resulting catalyst were characterized by Inductively coupled plasma atomic emission spectroscopy (ICP-AES), Fourier transform infrared (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), Transmission electron microscopy (TEM) and thermogravimetric-Differential thermal analysis (TG-DTA). The study demonstrated that newly synthesized VMWP well incorporated on nMont with their good performance and activity. The catalytic application is evaluated in one-pot multicomponent synthesis of tetrahydrobenzo[b]pyrans (4H-Pyran) and polyhydroquinolines in excellent yield. High conversion, shorter reaction time, environmentally benign solvent simple experimental and work procedure and reusability of the catalyst are the prominent features of our synthetic route.

No abstract

No abstract