Method for the carbonylation of pentenoic acid and...

C - Chemistry – Metallurgy – 07 – C

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C07C 255/19 (2006.01) C07C 51/02 (2006.01) C07C 51/14 (2006.01) C07C 53/00 (2006.01) C07C 67/36 (2006.01) C07C 67/38 (2006.01) C07C 253/30 (2006.01)

Patent

CA 2436874

The invention relates to a method for the carbonylation of n-pentenoic acid or derivatives thereof of formula (I), wherein R1 represents CN or COOR2 and R2 represents hydrogen, alkyl or aryl. According to said method, a compound of formula (I) is reacted with carbon monoxide and a compound (II) containing a hydroxyl group in the presence of a catalyst system. The method is characterised in that the catalyst system is obtained by reacting a) a source of a metallic ion of a metal (III) of the 8th subgroup of the periodic table with b) a bidentate phosphine ligand of formula (IV), wherein R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 and R14 independently of one another represent an inorganic group, which contains a respective carbon atom, by means of which the respective group is linked to the relevant tertiary carbon atom given in formula (IV), L1, L2represent independently of one another a lower alkylene group and X represents an arylene group.

L'invention concerne un procédé de carbonylation d'acide n-penténoïque ou de ses dérivés de formule (I), dans laquelle R?1¿: CN ou COOR?2¿ avec R?2 ¿: hydrogène, alkyle ou aryle. Selon le procédé, on met à réagir un composé de formule (I) avec du monoxyde de carbone et un composé (II) contenant un groupe hydroxyle, en présence d'un système catalyseur. L'invention est caractérisée en ce que l'on obtient ce système catalyseur en mettant à réagir a) une source d'un ion métallique d'un métal (III) du 8?eme¿ sous-groupe de la classification périodique des éléments avec b) un ligand bidente de phosphine de formule (IV), dans laquelle R?3¿, R?4¿, R?5¿, R?6¿, R?7¿, R?8¿, R?9¿, R?10¿, R?11¿, R?12¿, R?13¿, R?14¿ sont indépendamment l'un de l'autre un reste organique qui comporte un atome de carbone, par l'intermédiaire duquel ledit reste est lié avec l'atome de carbone tertiaire correspondant cité dans la formule (IV), L?1¿, L?2¿ représentant indépendamment l'un de l'autre un groupe alkylène inférieur, et X un groupe arylène.

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