Method for the preparation of optically active...

C - Chemistry – Metallurgy – 07 – D

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C07D 487/04 (2006.01)

Patent

CA 2363094

A process is provided, by which pyrroloazepine derivatives expected to be useful as drugs can be obtained easily at a low cost on an industrial scale in the form of optically active substances requisite to drugs. Specifically, a process for production of optically active pyrroloazepine derivatives of the general formula (I) [wherein Z is optionally substituted phenyl], which comprises the step of conducting asymmetric reduction of a precursor ketone with a combination of a metal hydride and an alcohol in the presence of an optically active cobalt complex catalyst and the step of purifying the obtained product.

L'invention concerne un procédé relatif à la production de dérivés de pyrroloazépine utiles comme médicaments. La production, facile et peu onéreuse, est réalisable à l'échelle industrielle. Les dérivés considérés sont des substances optiquement actives requises dans certains médicaments. L'invention concerne spécifiquement un procédé relatif à la production de dérivés de pyrroloazépine optiquement actifs représentés par la formule générale (I). Dans ladite formule, Z est phényle éventuellement substitué. Le procédé consiste à effectuer une réduction asymétrique de cétone précurseur avec une combinaison d'hydrure métallique et d'alcool en présence de catalyseur complexe au cobalt optiquement actif, puis à purifier le produit résultant.

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