Method for purifying 4-amino-piperidines

Details Method for purifying 4-amino-piperidines Method for purifying 4-amino-piperidines

C - Chemistry, Metallurgy

07

D

C07D 211/58 (2006.01)

Patent

CA 2305282

The invention relates to a method for purifying 2,2,6,6-tetrasubstituted 4- amino-piperidines produced from the corresponding piperidin-4-ones, and subsequent distillation. According to the invention, the distilled 2,2,6,6- tetrasubstituted 4-amino-piperidine is reacted with hydrogen in the presence of a hydrating or dehydrating catalyst and the 4-amino piperidine is then separated from the reaction mixture.

L'invention concerne un procédé de purification de 4-amino-pipéridines 2,2,6,6-tétrasubstituées, obtenues à partir des pipéridine-4-ones correspondantes et par distillation subséquente, du fait que la 4-amino-pipéridine 2,2,6,6,-tétrasubstituée distillée est mise à réagir en présence d'un catalyseur d'hydrogénation ou de déshydrogénation, avec de l'hydrogène et que la 4-amino-pipéridine est séparée du mélange réactionnel.

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