NON-ACIDIC PALLADIUM-BASED CATALYST SYSTEM AND ITS USE IN CARBONYLATION

摘要

The invention provides a process for the carbonylation of ethylenicallyunsaturated compounds by reaction with carbon monoxideand a co-reactant in the presence of a substantially non-acidic catalystsystem based on a palladium compound and a bidentate ligand of theformula (I): R1R2M1RM2R3R4 wherein M1 and M2 independently represent aphosphorus, arsenic or antimony atom, R represents a bivalentorganic bridging group, R1, R2, R3 and R4 independently represent substitutedor non-substituted aliphatic groups, with the proviso that R1together with R2, and/or R3 together with R4 represent a bivalent cyclic groupwith at least 5 ring atoms whereby the two free valenciesare linked to M1 or M2, respectively. In addition, the invention providescatalytic compositions comprising: a) a palladium compound; b)a bidentate ligand of the formula (II): R1R2PRPR3R4 wherein R is a bivalentorganic bridging group containing from 1 to 10 atoms in thebridge and R1, R2, R3 and R4 independently represented substituted or non-substituted aliphatic groups, with the proviso that R1 togetherwith R2 and/or R3 together with R4 represent a bivalent cyclic group with atleast 6 ring atoms whereby the two free valencies are linkedto the phosphorus atoms(s) and c) a basic compound.