CONDENSATION OF ETHYL ALPHA-ETHOXYMETHYLENEACYLACETATES WITH P-BROMOBENZOYLHYDRAZINES AND BENZYLIDENEHYDRAZINES

Authors
ZAKHARYCHEV VV KOVALENKO LV
Citation
Vv. Zakharychev et Lv. Kovalenko, CONDENSATION OF ETHYL ALPHA-ETHOXYMETHYLENEACYLACETATES WITH P-BROMOBENZOYLHYDRAZINES AND BENZYLIDENEHYDRAZINES, Russian chemical bulletin, 45(9), 1996, pp. 2177-2180
Citations number
8
Categorie Soggetti
Chemistry
Journal title
Russian chemical bulletin → ACNP
ISSN journal
10665285
Volume
45
Issue
9
Year of publication
1996
Pages
2177 - 2180
Database
ISI
SICI code
1066-5285(1996)45:9<2177:COEAWP>2.0.ZU;2-B
Abstract
Ethyl alpha-ethoxymethyleneacetoacetate and alpha-ethoxymethylenebenzo ylacetate react with benzylidenehydrazine and p-bromobenzoylhydrazine to give hydrazones of the corresponding ethyl alpha-formylacylacetates . It was established by H-1 NMR and IR spectroscopy that hydrazones, w hich were obtained from benzylidenehydrazine, and p-bromobenzoylhydraz one of ethyl alpha-formylacetoacetate exist in the ketoenamine (ketoen hydrazine) form, whereas p-bromobenzoylhydrazone of ethyl alpha-formyl benzoylacetate exists in the enolimine (enolhydrazone) form.