A mild and efficient method for halogenation of 3,5-dimethyl pyrazoles by ultrasound irradiation using N-halosuccinimides

A mild and efficient method for halogenation of 3,5-dimethyl pyrazoles by ultrasound irradiation using N-halosuccinimides

Autor Stefani, H. A. Google Scholar
Pereira, CMP Google Scholar
Almeida, R. B. Google Scholar
Braga, R. C. Google Scholar
Guzen, K. P. Google Scholar
Cella, R. Google Scholar
Instituição Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo The 4-halo-3,5-dimethyl pyrazoles have been synthetisized in good yields in short reaction times in the absence of a catalyst by reaction of 3,5-dimethyl pyrazoles with N-halosuccinimides (NBS, NCS and NIS) under ultrasound irradiation. Finally, the halogenation of pyrazoles with Br-2, ICI and I-2 was showed in similar conditions. (c) 2005 Elsevier B.V. All rights reserved.
Assunto heterocycles
pyrazoles
halogenation
ultrasound irradiation
N-halosuccinimides
Idioma Inglês
Data 2005-10-03
Publicado em Tetrahedron Letters. Oxford: Pergamon-Elsevier B.V., v. 46, n. 40, p. 6833-6837, 2005.
ISSN 0040-4039 (Sherpa/Romeo, fator de impacto)
Editor Elsevier B.V.
Extensão 6833-6837
Fonte http://dx.doi.org/10.1016/j.tetlet.2005.08.027
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000231932000011
URI http://repositorio.unifesp.br/handle/11600/28508

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