Novel process for production of...

C - Chemistry – Metallurgy – 07 – D

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C07D 417/12 (2006.01)

Patent

CA 2649374

The present invention provides a novel, industrially easily realisable and economically preferable process for production of pure 5-{2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]-ethyl}-6-chloro-1,3-dihydro-2H-indol-2-one i.e., ziprasidone hydrochloride shown in the reaction scheme (II), (III), (IV), (V) and (VI). According to the invention the intermediate compound 5-(2-bromoethyl)-6-chloro-1,3-dihydro-2H-indol-2-one of Formula (III) is produced from 5-(2-bromoacethyl)-6-chloro-1,3-dihydro-2H-indole-2-one of Formula (IV). The highly pure ziprasidone base of Formula (II) is obtained in the reaction of 3-piperazinyl-1,2-benzisothiazol of Formula (VI) with 5-(2-bromoethyl)-6-chloro-1,3-dihydro-2H-indol-2-one of Formula (III) in an organic solvent or organic solvent mixture.

La présente invention concerne un nouveau procédé aisément transposable à l'échelle industrielle et économiquement avantageux pour la production de la 5-{2-[4-(1,2-benzisothiazol-3-yl)-1-pipérazinyl]-éthyl}-6-chloro-1,3-dihydro-2H-indol-2-one pure, c'est-à-dire du chlorhydrate de ziprasidone, ledit procédé étant présenté dans les schémas réactionnels suivant (II), (III), (IV), (V) et (VI). Selon l'invention, le composé intermédiaire, la 5-(2-bromoéthyl)-6-chloro-1,3-dihydro-2H-indol-2-one de formule III est obtenu à partir de la 5-(2-bromoacétyl)-6-chloro-1,3-dihydro-2H-indole-2-one de formule IV. La base de ziprasidone de pureté élevée de formule II est obtenue par la réaction du 3-pipérazinyl-1,2-benzisothiazol de formule VI avec la 5-(2-bromoéthyl)-6-chloro-1,3-dihydro-2H-indol-2-one de formule III dans un solvant organique ou un mélange de solvants organiques.

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