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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 34, 2004 - Issue 10
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Original Articles

One‐Pot Synthesis of Pyrazole‐5(3)‐carboxyamides

Marcos A. P. Martins Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, BrazilCorrespondence[email protected]
,
Daniel Emmerich Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Paulo Beck Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Wilson Cunico Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Claudio M. P. Pereira Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Adilson P. Sinhorin Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Sergio Brondani Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Rodrigo Peres Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Marcos V. M. Teixeira Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
,
Helio G. Bonacorso Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
&
Nilo Zanatta Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Universidade Federal de Santa Maria, 97.105‐900, Santa Maria, RS, Brazil
 show all
Pages 1915-1923 | Received 03 Jan 2004, Published online: 20 Aug 2006
 
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Abstract

A convenient one‐pot synthesis of eight pyrazole‐5(3)‐carboxyamides from the reaction of the 5(3)‐trichloromethylpyrazoles with amines, in good yield, is reported. These reactions show that the trichloromethyl group is a convenient precursor to carboxyamide groups.

Acknowledgments

The authors thank the Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq, Contracts No. 46.0804/00–6 and 480067/01–5), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS) and CAPES for financial support and fellowships.

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