| abstract |
Phosphenium compounds with the general formula I: n nin whichn R 1 , R 2 , R 3 and R 4 are identical or different and represent a linear or branched C 1 -C 6 -alkyl radical, which can optionally be substituted, or R 1 and R 2 and/or R 3 and R 4 are bonded to one another with the formation of a ring, R 5 and R 6 stand for a saturated or unsaturated and linear or branched alkyl group, alkenyl group or aryl group, which can have suitable substituents, even heteroatoms as substituents, or a heteroatom-comprising hydrocarbon group, which can have suitable substituents, and the R 5 and R 6 radicals can form a ring which can be 4- to 20-membered, saturated or unsaturated and alicyclic or heteroalicyclic and can exhibit suitable substituents, X − represents an anion, a process for the preparation thereof, and also the use of these compounds in metal complexes which can be used as catalysts in organic synthesis, are claimed. |