Synthesis 2021; 53(07): 1271-1284
DOI: 10.1055/s-0040-1706542
paper

Iodothiophenes and Related Compounds as Coupling Partners in Copper-Mediated N-Arylation of Anilines

Salima Bouarfa
a   Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
b   Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université d’Oran 1 Ahmed Ben Bella, BP 1524 El M’Naouer, 31000 Oran, Algeria   Email: bentabedg@gmail.com
,
Ghenia Bentabed-Ababsa
b   Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences Exactes et Appliquées, Université d’Oran 1 Ahmed Ben Bella, BP 1524 El M’Naouer, 31000 Oran, Algeria   Email: bentabedg@gmail.com
,
a   Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
,
Laurent Picot
c   La Rochelle Université, Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France   Email: laurent.picot@univ-lr.fr
,
Valérie Thiéry
c   La Rochelle Université, Laboratoire Littoral Environnement et Sociétés, UMRi CNRS 7266, Université de La Rochelle, 17042 La Rochelle, France   Email: laurent.picot@univ-lr.fr
,
Thierry Roisnel
a   Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
,
Vincent Dorcet
a   Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
,
a   Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
› Author Affiliations
We thank the Université de Rennes 1 and the Centre National de la Recherche Scientifique (F.M.). We acknowledge the European Regional Development Fund (Fonds Européen de Développement Régional, FEDER; D8 VENTURE Bruker AXS diffractometer). L.P. and V.T. thank La Ligue contre le Cancer (French Cancer League; Comité 17 and Comité 86) for financial support and the Cancéropôle Grand Ouest (axis: Marine Molecules, Metabolism and Cancer 3MC) for scientific support. This research has been partly performed as part of the CNRS PICS project ‘Bimetallic synergy for the functionalization of heteroaromatics’.


Abstract

N-Arylation of various 2-acylated anilines with different electron-rich heteroaryl iodides (2- and 3-iodothiophenes, 2- and 3-iodobenzothiophenes­, 2-iodobenzofuran) was achieved by using activated copper and potassium carbonate in dibutyl ether at reflux. The reactivity of the different heteroaryl iodides and anilines employed was discussed and rationalized on the basis of their electronic features. Subsequent cyclization by aromatic electrophilic substitution easily took place in the case of C2-free (benzo)thienyl or C3-free (benzo)furyl derivatives­, affording original tri- and tetracycles. The antiproliferative activity of most of them was evaluated in A2058 melanoma cells and revealed four chlorinated tetracycles as effective growth inhibitors.

Supporting Information



Publication History

Received: 12 August 2020

Accepted after revision: 18 September 2020

Article published online:
26 October 2020

© 2020. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany