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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 36, 2006 - Issue 18
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Original Articles

KHSO4 · H2O/SiO2‐Catalyzed, One‐Pot, Solvent‐Free Synthesis of Pyrazolines, Tetrahydrocarbozoles and Indoles using Microwave Irradiation

Kamal K. Kapoor Department of Chemistry, University of Jammu, Jammu, IndiaCorrespondence[email protected]
,
Bilal A. Ganai Department of Chemistry, University of Jammu, Jammu, India
,
Satish Kumar Department of Chemistry, University of Jammu, Jammu, India
&
Charanjeet S. Andotra Department of Chemistry, University of Jammu, Jammu, India
Pages 2727-2735 | Received 15 Feb 2006, Published online: 16 Feb 2007
 
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Abstract

A new high‐yielding, operationally simple, solvent‐free, and mild method for preparation of pyrazolines, tetrahydrocarbazoles, and indoles has been developed using KHSO4 · H2O impregnated on SiO2. The reactions have been probed under microwave irradiation (MWI), and ultrasonic and thermal conditions, employing different solid supports. The data revealed that KHSO4 · H2O impregnated on SiO2 under MWI provides the best yields in a shorter time under solvent‐free reaction conditions.

Acknowledgments

One of the authors (S.K.) is thankful to C.S.I.R (New Delhi) for a junior research fellowship.

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