Reactivity of p??phenyl substituted β??enamino compounds using k??10/ultrasound. I. synthesis of pyrazoles and pyrazolinones

…, HS Braibante, MEF Braibante

Index: Valduga, Claudete J.; Braibante, Hugo S.; Braibante, Mara E.F. Journal of Heterocyclic Chemistry, 1998 , vol. 35, # 1 p. 189 - 192

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Citation Number: 31

Abstract

Abstract The reactivity of the β-enamino ketones, 3-amino-1-(p-phenyl-substituted)-2-buten- 1-ones 1a-d and β-enamino esters. Ethyl-3-amino-3-(p-phenyl-substituted)-2-propenoates 5a-d were evaluated by systematic studies of the reactions with hydrazine and methylhydrazine by reactions with solid support K-10/ultrasound and homogeneous media (reflux in ethanol or dichloromethane) yielding pyrazole rings 2a-d, N-methylpyrazoles 3a- ...