Process for preparing .beta.,.gamma.-unsaturated carboxylic...

C - Chemistry – Metallurgy – 07 – C

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260/485.3, 260/4

C07C 69/533 (2006.01)

Patent

CA 1177492

PRECIS DE LA DIVULGATION: Procédé de préparation d'esters d'acides carboxyliques .beta.,?-insaturés par carbonylation d'un diène conjugué par de l'oxyde de carbone, en présence de l'alcool correspondant à l'ester recherché, d'un hydracide halogéné, d'un catalyseur au palladium et d'un sel d'ammonium quaternaire, de phosphonium quaternaire ou d'arsonium quaternaire, présentant un anion choisi parmi les bases " dures" ou " intermédiaires" . L'invention s'applique particulièrement à la préparation de monoesters pentène-3 oïques par carbonylation du butadiène.

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