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ChemInform Abstract: Reactivity of p-Phenyl Substituted β-Enamino Compounds Using K-10/Ultrasound. Part 1. Synthesis of Pyrazoles and Pyrazolinones.

✍ Scribed by C. J. VALDUGA; H. S. BRAIBANTE; M. E. F. BRAIBANTE

Publisher
John Wiley and Sons
Year
2010
Weight
37 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

Reactivity of p-Phenyl Substituted β-Enamino Compounds Using K-10/Ultrasound. Part 1. Synthesis of Pyrazoles and Pyrazolinones.

-In order to examine the reactivity of the electrophilic center in the β-enamino ketones (I) and esters (VI) these compounds are reacted with hydrazine and methylhydrazine in heterogeneous and homogeneous media. It is concluded that ketones (I) are more reactive than esters (VI). The regiochemistry of the cyclization shows dependence on the reaction conditions as well as the substituent at the aromatic ring. -(VALDUGA, C.

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Reactivity of p-Phenyl Substituted β-Enamino Compounds Using K-10/Ultrasound. Part 1. Synthesis of Pyrazoles and Pyrazolinones. -In the reaction with unsubstituted hydrazine it is not clarified which of the both forms (II) or (III) is obtained. -(VALDUGA, C.

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