Method for producing optically active alcohols or carboxylic...

C - Chemistry – Metallurgy – 07 – C

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Details

C07C 29/149 (2006.01) C07C 31/22 (2006.01) C07C 213/00 (2006.01) C07C 215/08 (2006.01) C07D 307/33 (2006.01)

Patent

CA 2553249

The invention concerns a method for producing optically active hydroxy-, alkoxy-, amino-, alkyl-, aryl- or chlorine-substituted alcohols or hydroxycarboxylic acids having 3 to 25 carbon atoms or their acid derivatives or cyclization products by hydrogenating the correspondingly substituted optically active monocarboxylic acids or dicarboxylic acids or their acid derivatives in the presence of a catalyst whose active constituent consists of rhenium or contains rhenium and at least one additional element of atomic numbers 22 to 83, with the provisions that: a) the at least one additional element of atomic numbers 22 to 83 is not rhenium, and; b) when producing optically active 2-amino-, 2-chloro-, 2-hydroxy- and 2-alkoxy-1-alkanols by the catalytic hydrogenation of correspondingly optically active 2-amino-, 2- chloro-, 2-hydroxy- and 2-alkoxy carboxylic acids or their acid derivatives, the at least one additional element of atomic numbers 22 to 83 is not palladium nor platinum.

L'invention concerne un procédé permettant de produire des alcools substitués par hydroxy, alcoxy, amino, alkyle, aryle ou chlore ou des acides hydroxycarboxyliques comprenant entre 3 et 25 atomes de carbone, optiquement actifs ou leurs dérivés acides ou leurs produits de cyclisation, par hydrogénation des acides mono- ou dicarboxyliques optiquement actifs substitués de manière appropriée ou leurs dérivés acides, en présence d'un catalyseur, dont le constituant actif se compose de rhénium et au moins un autre élément des nombres atomiques compris entre 22 et 83, sous réserve que a) l'autre élément (au moins au nombre de un) des nombres atomiques compris entre 22 et 83 ne soit pas le ruthénium, b) en cas de production de 2-amino-, 2-chloro-, 2-hydroxy- et 2-alcoxy-1-alcanols optiquement actifs, par hydrogénation catalytique d'acides 2-amino-, 2-chloro-, 2-hydroxy- et 2-alcoxycarboxyliques optiquement actifs ou de leurs dérivés acides, l'autre élément (au moins au nombre de un) des nombres atomiques compris entre 22 et 83 ne soit pas le palladium ou le platine.

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