The Preparation of Substituted 5H-Pyrazolo[1,5-c] [1,3]-Benzoxazin-5-ones from the Trianions of Certain Hydroxyphenylcarboethoxyhydrazones
- 1 January 1990
- journal article
- research article
- Published by Taylor & Francis in Synthetic Communications
- Vol. 20 (2) , 253-259
- https://doi.org/10.1080/00397919008052291
Abstract
The trianions of the carboethoxyhydrazones of o-and p-hydroxyacetophenones and related materials were prepared in an excess of lithium diisopropylamide (LDA), condensed with methyl salicylate or methyl 4-methoxysalicylate, and acid-cyclized to substituted pyrazolobenzoxazinones.Keywords
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