An efficient and rapid dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) using CAN/HCl
摘要:
An efficient and operationally simple method for the dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) has been developed using CAN/HCl. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Characterization of Zn<sub>(1-x)</sub>Ni<sub>x</sub>Al<sub>2</sub>O<sub>4</sub>Spinels as a New Heterogeneous Catalyst of Biginelli's Reaction
$Zn_(1-x)}Ni_xAl_2O_4$ (x = 0.0-1.0) spinels were prepared at $800^\circ}C$ by co-precipitation method and characterized by infrared spectroscopy, X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. The specific surface area was determined by BET. SEM image showed nano sized spherical particles. XPS confirmed the valence states of the metals, showing moderate Lewis character for the surface of materials. The powders were successfully used as new heterogeneous catalysts of Biginelli's reaction, a one-pot three-component reaction, leading to some dihydropyrimidinones (DHPMs). These new catalysts that produced good yields of DHPMs, were easily recovered by simple filtration and subsequently reused with persistent activity, and they are non-toxic and environmentally friendly. The optimum amount of catalyst is 20% by weight of benzaldehyde derivatives, while the doping amount has been found optimal for x = 0.1.
An efficient and rapid dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) using CAN/HCl
作者:Hitendra N. Karade、Jyotiranjan Acharya、Mahabir Parshad Kaushik
DOI:10.1016/j.tetlet.2012.08.017
日期:2012.10
An efficient and operationally simple method for the dehydrogenation of 4-aryl-3,4-dihydropyrimidin-2(1H)-ones (DHPMs) has been developed using CAN/HCl. (C) 2012 Elsevier Ltd. All rights reserved.
Dihydropyrimidinones: efficient one-pot green synthesis using Montmorillonite-KSF and evaluation of their cytotoxic activity
作者:Saleem Farooq、Fahad A. Alharthi、Ali Alsalme、Aashiq Hussain、Bashir A. Dar、Abid Hamid、S. Koul
DOI:10.1039/d0ra09072g
日期:——
A simple, efficient, cost-effective, recyclable and green approach has been developed for the synthesis of new dihydropyrimidinone analogs via the Biginelli reaction. The methodology involves a multicomponent reaction catalyzed by “HPA-Montmorillonite-KSF” as a reusable and heterogeneous catalyst. This method gives an efficient and much improved modification of the original Biginelli reaction, in terms