abstract |
The invention relates to sulfonated phosphine ligands of the structure and to catalyst systems comprising these ligands and to their use in cross-coupling reactions, where R<SUB>1-6</SUB>, X<SUB>1-10</SUB>, Y<SUB>1</SUB>, Y<SUB>2</SUB>, P and Q<SUB>1-4</SUB> are each defined as specified. |