DERIVES DE TYPE PHOSPHINE-PHOSPHITE, LEUR PROCEDE DE PREPARATION ET LEUR UTILISATION POUR LA PREPARATION DE CATALYSEURS UTILES DANS LES REACTIONS D'HYDROFORMYLATION DES OLEFINES

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.