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Sociedade Brasileira de Química, SBQ, Journal of the Brazilian Chemical Society, 2(21), p. 240-247, 2010

DOI: 10.1590/s0103-50532010000200008

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Highly regioselective synthesis of novel 1,4'-bipyrazoles

Journal article published in 2010 by Zanatta,Nilo, Marcos A. P. Martins ORCID, Martins,Marcos A. P., Fiss,Gabriela F., Gabriela F. Fiss, Clarissa P. Frizzo ORCID, Frizzo,Clarissa P., Rosa,Fernanda A., Fernanda A. Rosa, Helio G. Bonacorso, Bonacorso,Helio G., Nilo Zanatta
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Novel 1,4'-bipyrazoles were synthesized via highly regioselective cyclocondensation reactions of β-dimethylaminoenones with hydrazine monohydrate, tert-butylhydrazine hydrochloride, phenylhydrazine hydrochloride or carboxymethylhydrazine. X-ray diffraction technique was used in the elucidation of the regiochemistry of the β-dimethylaminoenaminones and of the 1,4'-bipyrazoles. 1,4'-Bipyrazolylisoxazoles were also reported.