Process for preparing bis-(diaryl-alkyl)-phosphines and novel derivatives of this class of substances.

摘要

The present invention relates to a process for the preparation of bis(diarylalkyl)phosphines of the general formula in which Ar<1> represents a phenyl or naphthyl radical, Ar<2> represents a phenyl or naphthyl radical, R and R' independently of one another are in each case identical or different and represent H, an alkyl, alkoxy or aryloxy radical having 1 to 8 carbon atoms, a dialkylamino radical having 2 to 8 carbon atoms, F, Cl or Br, m represents an integer from 1 to 4, n represents an integer from 1 to 5 and X represents an alkylene group having 1 to 3 carbon atoms, by reacting a bis(diarylalkyl)phosphine oxide of the general formula in which Ar<1>, Ar<2>, R, R', m, n and X have the abovementioned meaning with an organyldichlorosilane of the general formula in which R'' represents an alkyl or alkylene radical having 1 to 6 carbon atoms or an aromatic radical having 6 to 10 carbon atoms and k represents an integer from 1 to 3, at 80 to 220 DEG C in the presence of a tertiary amine having a total of 6 to 24 carbon atoms, if appropriate in the presence of a solvent. The invention furthermore relates to novel 2,2'-bis[bisaryl]phosphinomethyl-1,1'-binaphthyls of the formula in which Ar<2> represents a phenyl radical, R' represents an alkyl radical having 1 to 4 carbon atoms, CF3, fluorine, chlorine or bromine, and n represents 1 or 2.