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Synlett 2000; 2000(4): 459-462
DOI: 10.1055/s-2000-6560
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Regioselective Nucleophilic Aromatic Substitution: Unexpected Results in the Thiophene Series

Evelyne Migianu* , Damien Prim, Gilbert Kirsch
  • *Groupe de Synthèse Organique et Hétérocyclique, Laboratoire de Chimie Organique, Université de Metz, Ile du Saulcy, F-57045 Metz Cedex, France; E-mail: prim@sciences.univ-metz.fr
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Publikationsdatum:
31. Dezember 2000 (online)

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The present study points out the unconventional behaviour of thiophene ring bearing two leaving groups and a weak electron withdrawing moiety towards nucleophilic attack. The S N Ar using secondary amines shows an unexpected regioselectivity: the para-like adduct is produced as the major isomer for the first time. The influence of several reaction conditions on the selectivity observed is investigated.

aminothiophene - nucleophilic aromatic substitution - regioselectivity