The dual role of Cu(I) as a protective group and a template in the synthesis of a tetra-rhodium(III)porphyrin [2]catenane

Maryline Beyler; Valérie Heitz; Jean-Pierre Sauvage

doi:10.1039/C0NJ00414F

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New Journal of Chemistry

Issue 9, 2010

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The dual role of Cu(I) as a protective group and a template in the synthesis of a tetra-rhodium(III)porphyrin [2]catenane

Maryline Beyler,^a Valérie Heitz*^a and Jean-Pierre Sauvage*^a

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Laboratoire de Chimie Organo-Minérale, LC3 UMR 7177 du CNRS, Université de Strasbourg, Institut de Chimie, 4 rue Blaise Pascal, France
E-mail: v.heitz@unistra.fr ;
Fax: +33 3 6885 1368 ;
Tel: +33 3 6885 1361

New J. Chem., 2010,34, 1825-1829

DOI: 10.1039/C0NJ00414F
Received 01 Jun 2010, Accepted 11 Jun 2010
First published online 29 Jun 2010

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Abstract
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A new [2]catenane containing four Rh(III) porphyrins has been prepared following a three-step strategy: (i) Cu(I)-driven entwining of two free base porphyrin-bearing bidentate chelates, followed by (ii) insertion of rhodium in the porphyrin nuclei, and finally (iii) cyclisation via the formation of N–Rh coordination bonds. Direct metalation of porphyrinic compounds with [Rh(CO)₂Cl]₂ was not met with success when the bidentate chelate used as a connector was metal free, thus making the Cu(I) protecting approach very attractive.

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