DOI: 10.1039/A605456K
(Paper)
Reference Section for: J. Chem. Res. (S), 1997, 30-31
Novel Preparation of 1-Aryl-3-(2-hydroxyphenyl)- 2-pyrazolin-5-ones and their Conversion into 2-Aryl- 4-methyl[1]benzopyrano[4,3-c]pyrazol-3(2H)-ones †
(Note: The full text of this document is currently only available in the PDF Version )
Jayne A. Froggett, Michael H. Hockley and Roger B. Titman
Abstract
1-Aryl-3-(2-hydroxyphenyl)-2-pyrazolin-5-ones are prepared from 4-hydroxycoumarin and arylhydrazines and then cyclised with triethyl orthoacetate to give 2-aryl-4-methyl[1]benzopyrano[4,3-c]pyrazol-3(2H)-ones.
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