Patent ID: 7737276
Filing Date: 2010-06-15
Classification: C07F

Abstract:
1. A process for preparing compounds of the formula (1), (2), (3) and (5a) according to scheme 1 in which: M is iridium or platinum, L, L*, L** are different ortho-metalated ligands, X is the same or different at each instance and is an anionic, monodentate or multidentate, bridging or chelating ligand, m is 1, 2 or 3, n is 0, 1 or 2, o is 0 or 1, where m+n+o=2 or 3 in each case, p is 1 or 2, and where the partial structure ML m is described by the formula (7), the partial structure ML* n by the formula (8) and the partial structure ML** o by the formula (9) according to scheme 2 in which: CyD1, CyD2, CyD3 are each heteroaromatic cyclic groups which may in turn bear one or more substituents R, containing, endocyclically, a donor atom D1, D2 and D3 via which the cyclic groups are bonded to the metal; the CyD1 and CyC1 groups, the CyD2 and CyC2 groups, and the CyD3 and CyC3 groups are joined together via one or more covalent bonds, D1, D2 and D3 are nitrogen, CyC1, CyC2, CyC3 are each aromatic cyclic groups which may in turn bear one or more substituents R and each include a carbon atom via which the cyclic groups are bonded to the metal, R are the same or different at each instance and are F, Cl, Br, I, NO R by reacting a metal compound M comp. with compounds of the formula (10a), (10b), (10c) according to scheme 3 in a melt suspension, dispersion, solution or n a supercritical medium in which the CyD1, CyD2, CyD3, CyC1, CyC2 and CyC3 radicals are each as defined under formula (7) to (9), wherein the reaction mixture is heated at a temperature in the range from 100 to 210° C. and microwave radiation of frequency from 300 to 300 000 MHz acts on the mixture comprising the metal compound M comp. and the compounds of the formula (10a), (10b), (10c) D1, D2 and D3 are nitrogen, and wherein the molar ratio of the metal compound to the compounds of the formula (10a), (10b), (10c) is from 1:1 to 1:20.