Regioselective grafting of two -CH2P(X)Ph2 units (X = O, lone pair) onto a resorcin[4]arene-derived cavitand

Abstract

The first diphosphanes based on a resorcinarene-derived ca-vitand were obtained in six steps starting from 5,11,17,23-tetrabromo-4(24),6(10),12(16), 18(22)-tetramethylenedioxy-2,8,14,20-tetrapentylresorcin[4]arene, The synthesis of these bulky ligands was based on the selective C-2 functionali-sation either of two proximal resorcinolic units or of two distal. ones, The ligands, both, of which were characterised by X-ray diffraction, readily react with [RuCl 2(p-cymene)]2 to form the corresponding bimetallic complexes [RuCl2(p-cymene)]2' L in which, the cavitand shape remains unchanged with re-spect to that of the free phosphanes. 2010 Wiley-VCH Verlag GmbH & Co. KGaA,.