| 摘要 |
The present invention relates to a hydroxybiarylphosphines of the formula <IMAGE> (I) in which Ar-Ar is biphenyl, 1-phenyinaphthyl or 1,1'-binaphthyl, R1 and R2 are identical or different and are F or alkoxy having in each case 1 to 8 carbon atoms or are substituted or unsubstituted aryl, a and b are identical or different and are an integer from 0 to 4, in which R3 and R4 are identical or different and are alkyl having 1 to 8 carbon atoms, cycloalkyl having 4 to 10 carbon atoms, alkaryl having 7 to 9 carbon atoms, Ar3-(R5)n, in which A3 is an aryl radical having 6 to 10 carbon atoms, R5 is CF3, dialkylamino having a total of 2 to 8 carbon atoms or -CH2N(alkyl)2 having 1 to 3 carbon atoms per alkyl and n is an integer from 0 to 5, or -R3-R4- forms a chain of 3 to 5 members to which one or two aromatic rings or ring systems having 6 to 10 carbon atoms are optionally fused together with the P atom, forms a ring having 4 to 6 members, with the proviso that Ar3-(R5)n is not phenyl or a phenyl substituted by halogen, alkyl or alkoxy each having 1 to 8 carbon atoms, if Ar-Ar is bipohenyl or 1,1'-binaphthyl and a=b=0 and R3 and R4 are identical in each case.
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