New process for preparing isoindoline

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 209/44 (2006.01)

Patent

CA 2338899

L'invention concerne un procédé de synthèse industrielle de l'isoindoline par hydrogénation catalytique du phtalonitrile. Selon l'invention, on soumet une solution de phtalonitrile dans le tétrahydrofurane, dans un mélange tétrahydrofurane/eau ou dans le diméthoxyéthane à une pression d'hydrogène comprise entre 100 et 180 bars, à une température comprise entre 30 et 100°C et en présence de Pt/C à 5 %. L'isoindoline ainsi obtenue est utile pour la synthèse de l'acide 2-(S)-benzyl-4-oxo-4-(cis- perhydroisoindol-2- yl)-butyrique, de ses sels pharmaceutiquement acceptables et de ses hydrates.

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