Reaction of Aryl and Heterocyclylhydrazines with 2-Methylchromone: Structural Investigation of the Products
- 1 September 1996
- journal article
- research article
- Published by Informa UK Limited in Synthetic Communications
- Vol. 26 (17), 3193-3200
- https://doi.org/10.1080/00397919608004628
Abstract
Reaction of 2-methylchromone (2) with phenylhydrazine provides 3-methyl-5-(o-hydroxyphenyl)-1-phenylpyrazole (6) as a major product. In contrast under similar conditions, heterocyclylhydrazines (8a-c) yield exclusively 5-ethyl-3-(o-hydroxyphenyl)-1-heterocyclylpyrazoles (9a-c). The structural assignments are based on an unambiguous synthesis and an analysis of NMR (1H & 13C) spectral data.Keywords
This publication has 7 references indexed in Scilit:
- Reaction of Hydrazinobenzoquinolines with 1,3-Diketones: A Structural ReinvestigationBulletin of the Chemical Society of Japan, 1993
- New ultraviolet stabilizers: 3- and 5-(2'-hydroxyphenyl)pyrazolesJournal of the American Chemical Society, 1992
- A1H and13c Nmr study of the structure and tautomerism of 4-pyrazolylpyrazolinonesJournal of Heterocyclic Chemistry, 1990
- Evolution of hydrogen sulfide in a fluidized bed coal gasification reactorIndustrial & Engineering Chemistry Research, 1989
- Reinvestigation of the condensation of 2-hydrazinobenzothiazole with ethyl acetoacetateJournal of Heterocyclic Chemistry, 1988
- 1,2,4-Triazoles. XXXII. Syntheses and Correlation of Proton Magnetic Resonance Spectral Characteristics with Molecular Orbital Parameters of Derivatives of the s-Triazolo[4,3-a]quinoline and s-Triazolo[3,4-a]isoquinoline Ring Systems.The Journal of Organic Chemistry, 1972
- 235. Some properties of 4-thionflavone and its methiodide, and of 4-thionchromonesJournal of the Chemical Society, 1952