Decatungstodivanadogermanic heteropoly acid (H6GeW10V2O40.22H2O): A green and reusable heterogeneous catalyst for the synthesis of Biginelli-type 3,4-dihydropyrimidin-2-(1H)-ones/thiones
محورهای موضوعی : Iranian Journal of Catalysis
Srinivasa Rao Jetti
1
(Laboratory of Heterocycles, School of Studies in Chemistry & Biochemistry, Vikram University, Ujjain, Madhya Pradesh 456010, India.)
Divya Verma
2
(Laboratory of Heterocycles, School of Studies in Chemistry & Biochemistry, Vikram University, Ujjain, Madhya Pradesh 456010, India.)
Shubha Jain
3
(Laboratory of Heterocycles, School of Studies in Chemistry & Biochemistry, Vikram University, Ujjain, Madhya Pradesh 456010, India.)
کلید واژه: 3, Biginelli reaction, Heterogeneous catalysis, Heteropolyacid, Decatungstodivanadogermanic acid, 4-dihydropyrimidin-2-(1H)-ones/thiones,
چکیده مقاله :
Decatungstodivanadogermanic acid (H6GeW10V2O40.22H2O) was used as a green heterogeneous catalyst for the synthesis of 3,4-dihydropyrimidin-2-(1H)-ones from one-pot three-component cyclocondensation reaction of a β-ketoester, an aldehyde and urea/thiourea under solvent-free conditions is reported. This method provides an efficient and much improved modification of the original Biginelli reaction reported in 1893, in terms of high yields, and short reaction times. It has the ability to allow a wide variety of substitutions in all three components.
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