Template Synthesis of Chiral Vicinal Diphosphinites as Their Pt^II and Pd^II Complexes

Abstract

Abstract The metal‐templated synthesis of a few examples of vicinal diphenylphosphinites is accomplished when the corresponding vicinal diols react with the diphenylchlorophosphane complexes cis ‐[MCl 2 (PPh 2 Cl) 2 ] (M = Pt, Pd) in anhydrous THF. This process is proposed as a new synthetic route for Pt II and Pd II complexes of the new ligands 1,2‐bis(diphenylphosphinito)butane, 2,3‐bis(diphenylphosphinito)butane, and 2,3‐bis(diphenylphosphinito)diisopropyl‐ L ‐tartrate, containing seven‐membered chelate rings including stereogenic carbons. The new chiral phosphane‐phosphinite ( R )‐3‐(diphenylphosphanyl)‐2‐(diphenylphosphinito)propanol has also been obtained as a Pt II six‐membered chelate. The X‐ray crystal structure of some of the described complexes and NMR evidence of the possibility of removing the ligands from the metal are reported. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)