Process for preparing optically active compounds

C - Chemistry – Metallurgy – 07 – F

Patent

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C07F 15/00 (2006.01) B01J 31/02 (2006.01) B01J 31/18 (2006.01) C07C 29/143 (2006.01) C07C 29/88 (2006.01) C07C 33/20 (2006.01) C07C 35/18 (2006.01) C07C 35/23 (2006.01) C07C 35/37 (2006.01) C07C 41/26 (2006.01) C07C 41/58 (2006.01) C07C 43/196 (2006.01) C07C 45/64 (2006.01) C07C 49/743 (2006.01) C07C 67/31 (2006.01) C07C 209/52 (2006.01) C07C 211/26 (2006.01) C07C 213/00 (2006.01) C07C 213/02 (2006.01) C07C 215/68 (2006.01) C07C 215/76 (2006.01) C07C 253/30 (2006.01) C07D 209/08 (2006.01) C07D 215/18 (2006.

Patent

CA 2239970

A novel and practically excellent process for preparing optically active compounds, such as optically active alcohols or amines, useful for various applications of, for example, synthetic intermediates of pharmaceuticals liquid crystalline materials, and reagents for optical resolution, wherein a hydrogen transfer type asymmetric reduction is carried out in the presence of both a transition metal complex and an optically active nitrogen compound or a transition metal complex having an optically active nitrogen compound as an asymmetric ligand, and a hydrogen-donating organic or inorganic compound. Further, optically active secondary alcohols are prepared from racemic secondary alcohols or meso-diols by a hydrogen transfer oxidation.

La présente invention concerne un procédé nouveau et excellent, dans la pratique, de préparation de composés optiquement actifs tels que des alcools ou des amines optiquement actifs, utiles dans différentes applications, par exemple d'intermédiaires synthétiques de produits pharmaceutiques, de cristaux liquides et de réactifs pour résolution optique dans lesquels on effectue une réduction dissymétrique du type à transfert d'hydrogène, en présence d'un complexe de métaux de transition et d'un composé d'azote optiquement actif, ou d'un complexe de métaux de transition ayant un composé d'azote optiquement actif comme coordinat dissymétrique, et un composé organique ou inorganique donneur d'hydrogène. En outre, l'invention concerne la préparation d'alcools secondaires optiquement actifs à partir d'alcools ou de mésodiols secondaires racémiques grâce à une oxydation par transfert d'hydrogène.

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