Diphosphine

C - Chemistry – Metallurgy – 07 – F

Patent

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Details

C07F 9/6568 (2006.01) B01J 31/24 (2006.01) C07C 67/38 (2006.01) C07F 9/6571 (2006.01)

Patent

CA 2461920

The invention relates to diphosphine of formula Rl>P-(CH)n-PR2R3 wherein Rl is a bivalent radical which together with the phosphorous atom to which it is linked represents an unsubstituted or substituted 2-phospha- tricyclo[3.3.1.1{3,7}]decyl-group or a derivative thereof, wherein one or several carbon atoms are replaced by heteroatoms, R2, R3 independently represent a monovalent radical having 1 -20 atoms or a joint bivalent radical having 2 - 20 atoms, n is 4 or 5, and the mixtures thereof as a suitable carboxylation system containing palladium or a palladium compound and said type of diphosphin. The invention also relates to a method for the carbonylation of a conjugated diene in the presence of said system.

La présente invention concerne de la diphosphine de formule R?1¿>P-(CH)¿n?-PR?2¿R?3¿ dans laquelle: R?1¿ est un radical bivalent qui représente avec l'atome de phosphore avec lequel il est lié, un groupe 2-phospha-tricyclo[3.3.1.1{3,7}]décyle substitué ou non, ou un dérivé de celui-ci, l'un ou plusieurs des atomes de carbone étant remplacés par des hétéroatomes; R?2¿, R?3¿ sont indépendamment un radical monovalent comprenant de 1 à 20 atomes ou un radical bivalent commun comprenant de 2 à 20 atomes; n vaut 4 ou 5. Ladite diphosphine et ses mélanges sont utilisés en tant que système approprié de catalyseur de carbonylation comprenant du palladium ou un composé de palladium, et une diphosphine de ce type. L'invention a également pour objet un procédé de carbonylation d'un diène conjugué en la présence d'un système de ce type.

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