Method for the productin of Arene bisphosphinoxides

摘要

Arene bisphosphine oxides of the general formula in which the radicals R<1> to R<4> independently of one another stand for a hydrogen atom or a C1-C6-alkyl or alkoxy group, or a C5-C10-aryl group, a C5-C12-aryloxy group or a C7-C14-arylalkoxy group, R<5> and R<6> independently of one another stand for a C1-C6-alkyl group, a C5-C10-cycloalkyl group or a C5-C12 aryl group, which can also contain one or two nitrogen or sulphur atoms in the ring system or can carry one or two halogen atoms, C1-C6-alkyl groups or C1-C6-alkoxy groups as substituents on the ring system or can stand for a C1-C6-alkoxy group, a C3-C8-alkoxyalkoxy group, a C5-C12-aryloxy group or C7-C14-arylalkoxy group or R<5> and R<6> together form a bridge of 2 to 10 carbon atoms, it also being possible for some of the carbon atoms to be a constituent of an aromatic ring.