Microwave-promoted oxidation of 1,3,5-trisubstituted 4,5-dihydro-1H-pyrazoles by in-situ generation of NO+ and NO respectively from sodium nitrite and sodium nitrate in acetic acid

✍ Scribed by Davood Azarifar; Behrooz Maleki; Mahta Sahraei

• Publisher: Journal of Heterocyclic Chemistry
• Year: 2008
• Tongue: English
• Weight: 236 KB
• Volume: 45
• Category: Article
• ISSN: 0022-152X
• DOI: 10.1002/jhet.5570450241

✦ Synopsis

Abstract

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Microwave‐assisted aromatization of 1,3,5‐trisubstituted 4,5‐dihydro‐1__H__‐pyrazoles by in‐situ generation of NO^+^ and NO~2~^+^ respectively from sodium nitrite and sodium nitrate in acetic acid has been carried out efficiently under mild reaction conditions in good to excellent yields.