%0 Journal Article
%T A novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications
%A Anumula
%A Rajini
%A Nookaraju
%A Muralasetti
%A Selvaraj
%A Kaliaperumal
%A Reddy
%A Ingala Ajit Kumar
%A Narayanan
%A Venkatathri
%J Materials Research
%D 2013
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%R 10.1590/S1516-14392012005000161
%X a novel, lamellar type vanadium n-propylamino phosphate catalyst is synthesized and characterized by using various physicochemical techniques such as powder x-ray diffraction, scanning electron microscopy/energy dispersive x-ray analysis, thermogravimetry/differential thermal analysis, fourier transform infrared analysis, electron spin resonance spectroscopy, ultraviolet - visible diffuse reflectance spectroscopy, x-ray photoelectron spectroscopy, 31p magic angle spinning nuclear magnetic resonance spectroscopy and catalytic applications toward octahydroquinazolinone synthesis. it is found that the n-propylamine is present as sandwich between vanadyl phosphate layers. most of the vanadium is present as v4+ ions in tetrahedral co-ordination. vanadium n-propylamino phosphate catalyses octahydroquinazolinone synthesis more effeciently and the optimum conditions required for octahydroquinazolinone synthesis are, benzaldehyde (2 mmol), dimedone (2 mmol), urea (4 mmol), methanol + water (1:1, 5 ml) and catalyst (0.05 g). a plausible mechanism is also proposed.
%K vanadium
%K n-propylamino phosphate
%K octahydroquinazolinones
%K synthesis.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-14392013000100023&lng=en&nrm=iso&tlng=en