Derivatives of phosphine type - phosphite, their process of preparation and their use for the preparation of catalysts which are useful in the reactions for hydroformylation of olefins

摘要

The invention concerns a compound of formula (I) wherein: A, Ar1- Ar2-, E, n, R1, R2, R3, R4, R5 and R6 are as defined in Claim 1. Said compounds are used for preparing catalysts useful for hydroformylation reactions of olefins.