Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Microwave-promoted aluminium sulphate in PEG as a green homogeneous catalytic system to synthesis of 3,4-dihydropyrimidin-2(1H)-ones
Author(s): Pravinsing S. Girase, Bhikan J. Khairnar, Deepak V. Nagarale and Bhata R. ChaudhariA simple, environmentally benign and highly efficient synthesis of 3, 4-dihydropyrimidin-2(1H)- (thio)one by using microwave promoted aluminium sulphate as a catalyst from aromatic aldehydes, 1, 3-dicarbonyl compounds & (thio)urea in PEG as a reaction solvent is described. Compared with the classical Biginelli reaction conditions, this new method has the advantage of excellent yield and short reaction time. The procedure is simple, rapid and high yielding. The catalyst exhibited a remarkable reactivity and is reusable up to 4 times without significant loss in yields and selectivity in PEG-400 as a solvent.
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