Process for preparing...

Details Process for preparing... Process for preparing...

C - Chemistry, Metallurgy

07

F

C07F 9/50 (2006.01) B01J 19/08 (2006.01) C07C 17/14 (2006.01) C07F 9/53 (2006.01)

Patent

CA 2145255

Process for preparing2,2'-bis(diphenylphosphinylmethyl)- 1,1'-binaphthyls and new compounds from this class of substances. The present invention relates to a process for preparing 2,2'-bis(diphenylphosphinylmethyl)-1,1'-binaphthyls, by reacting a reaction mixture prepared in a solvent by reaction of 2,2'-dimethyl-1,1'-binaphthyl with a bromina- ting agent and containing 2,2'-bis(bromomethyl)-1,1'- binaphthyl and further brominated binaphthyls, if desired after removal of unreacted brominating agent, reacted brominating agent and/or solvent, with an alkyl diphenyl- phosphinite of the formula RO-P(Ph-(R')n)2, where R is an alkyl radical having from 1 to 5 carbon atoms, Ph is phenyl, R' is an alkyl radical having from 1 to 4 carbon atoms, CF3, fluorine, chlorine or bromine and n is 0, 1 or 2, at from 70 to 180°C in the presence or absence of a further solvent. The invention further relates to compounds of the formula Image where R' is an alkyl radical having from 1 to 4 carbon atoms, CF3, fluorine, chlorine or bromine and n is 1 or 2.

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