Synlett 2009(7): 1118-1122  
DOI: 10.1055/s-0029-1216630
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis of Selenium-Substituted Pyrroles and Pyrazol-3-ones

Orazio A. Attanasi*a, Lucia De Crescentini*a, Fabio Mantellinia, Francesca Marinib, Simona Nicolinia, Silvia Sternativob, Marcello Tiecco*b
a Istituto di Chimica Organica, Università degli Studi di Urbino ‘Carlo Bo’, Via I Maggetti, 24, 61029 Urbino (PU), Italy
Fax: +39(0722)303441; e-Mail: orazio.attanasi@uniurb.it; e-Mail: lucia.decrescentini@uniurb.it;
b Dipartimento di Chimica e Tecnologia del Farmaco, Sezione di Chimica Organica, Università di Perugia, 06123 Perugia, Italy
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Publication History

Received 20 November 2008
Publication Date:
02 April 2009 (online)

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Abstract

An approach to the synthesis of 4-(phenylseleno)pyrroles, 4-(phenylseleno)pyrazol-3-ones, and 4-(1,3-benzoselenazol-2-ylthio)pyrazol-3-ones is described. Their formation passes through hydrazonic intermediates obtained by the reaction between 1,2-diaza-1,3-butadienes and 1-(phenylseleno)ketones, phenylselenol, or 2-mercaptobenzoselenazole, respectively.