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IJC-B Vol.48B(08) [August 2009] >

Title: VOSO4-catalyzed Biginelli condensation: An efficient synthesis of dihydro-1H-pyrimidine-2-thione/one and octahydro-2,5-quinazolinedione
Authors: Reddy, Ch Sanjeeva
Raghu, M
Nagaraj, A
Keywords: VOSO4 catalyst
microwave irradiation
Issue Date: Aug-2009
Publisher: CSIR
Abstract:  The three component condensation of an aldehyde 1, urea/thiourea 2 and Ī²-ketoester 3 / dimidone 7 in the presence of a catalytic amount of VOSO4 is disclosed for the synthesis of 3,4-dihydro-1H-pyrimidine-2-thione/one (DHPMs) 4 and octahydro-2,5-quinazolinedione 8 under solvent-free microwave irradiation conditions. High yields are achieved even on 1 g scale, while reaction times are considerably shortened compared to convenĀ­tional heating conditions.
Page(s): 1178-1182
ISSN: 0975-0983 (Online); 0376-4699 (Print)
Source:IJC-B Vol.48B(08) [August 2009]

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