ol100215c_si_002.cif (43.38 kB)

Dual Selectivity Expressed in [2 + 2 + 1] Dynamic Clipping of Unsymmetrical [2]Catenanes

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posted on 02.04.2010, 00:00 by Gayane Koshkakaryan, Dennis Cao, Liana M. Klivansky, Simon J. Teat, Jasper L. Tran, Yi Liu
A π-templated dynamic [2 + 2 + 1] clipping protocol is established for the synthesis of [2]catenanes from two parts dialdehyde, two parts diamine, and one part tetracationic cyclophane. It is further diversified for the selective formation of an unsymmetrical [2]catenane showing great translational selectivity by employing two different dialdehydes in a one-pot reaction. The dual selectivity and the dynamic nature are verified by 1H NMR spectroscopy, X-ray single-crystal structural studies, and exchange experiments.