Method for the production of aryl-aryl coupled compounds
AssigneeMerck Patent GmbH
InventorsAurelie Falcou, Jochen Schwaiger, Andrea Ritter
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Abstract
The present invention relates to a process for preparing aryl-aryl-coupled compounds and materials. These materials play an important role in industry, for instance as liquid crystals, pharmaceuticals, agrochemicals and as organic semiconductors. The aryl-aryl couplings hitherto carried out by means of Yamamoto coupling require specific additives in order to give a product suitable for the subsequent use. Particularly in the electronics industry, the Yamamoto coupling needs to meet particular requirements.
Claims19
A process for coupling aromatic or heteroaromatic halogen compounds to form one or more C—C single bonds, characterized in that an Ni(0) complex comprising at least two different ligands, with at least one ligand being selected from each of the two groups consisting of heteroatom-containing ligands (group 1) and of π system ligands (group 2), is used in catalytic amounts,
- and a reducing agent which converts consumed nickel back into Ni(0) is used;
- the reaction takes place in an anhydrous, aprotic medium under a very largely inert atmosphere, with the proviso that no phosphorus-containing compound is added.
Dependencies are inferred from the claim text.