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Molecules 2011, 16(11), 9041-9048; doi:10.3390/molecules16119041
Article

One-Pot and Efficient Synthesis of Triazolo[1,2-a]indazole-triones via Reaction of Arylaldehydes with Urazole and Dimedone Catalyzed by Silica Nanoparticles Prepared from Rice Husk

1,* , 2
, 3
 and 1
1 Department of Chemistry, Payame Noor University (PNU), P.O. Box 19395-369776175-559, TehranKerman, Iran 2 Mining and Engineering Department of Zarand, Shahid Bahonar University, Kerman, 76169-14111, Iran 3 Department Institute of Materials Environmental Science, International Center for Science and High Technology and Environmental Science, P.O. Box 76315-117, Kerman, Iran
* Author to whom correspondence should be addressed.
Received: 19 September 2011 / Revised: 13 October 2011 / Accepted: 20 October 2011 / Published: 26 October 2011
(This article belongs to the Special Issue Microwave Assisted Synthesis)
Download PDF [184 KB, 18 June 2014; original version 18 June 2014]

Abstract

A novel synthesis of triazolo[1,2-a]indazole-1,3,8-trione derivatives by reaction of urazole, dimedone and aromatic aldehydes under conventional heating and microwave irradiation and solvent-free conditions using silica nanoparticles prepared from rice husk ash as catalyst is described. The new method features high yields, multicomponent reactions and environmental friendliness.
Keywords: multicomponent reaction; nanosilica sulfuric acid; microwave irradiation; rice husk multicomponent reaction; nanosilica sulfuric acid; microwave irradiation; rice husk
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hamidian, H.; Fozooni, S.; Hassankhani, A.; Mohammadi, S.Z. One-Pot and Efficient Synthesis of Triazolo[1,2-a]indazole-triones via Reaction of Arylaldehydes with Urazole and Dimedone Catalyzed by Silica Nanoparticles Prepared from Rice Husk. Molecules 2011, 16, 9041-9048.

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