Process for preparing single enantiomer narwedine

Details Process for preparing single enantiomer narwedine Process for preparing single enantiomer narwedine

C - Chemistry, Metallurgy

07

D

C07D 491/10 (2006.01) C07D 491/06 (2006.01)

Patent

CA 2284976

A process for the preparation of substantially single enantiomer (-)-narwedine comprises seeding a solution of racemic narwedine dissolved in a solvent with substantially single enantiomer (-)-narwedine, provided that if an added amine base is present the ratio solvent: added amine base is greater than 15:1.

Ce procédé de préparation de (-)-narwédine possédant sensiblement un seul énantiomère consiste à ensemencer une solution de narwédine racémique dissoute dans un solvant, à l'aide de (-)-narwédine possédant sensiblement un seul énantiomère, à condition que si on utilise une base amine, le rapport solvant/base amine ajoutée soit supérieur à 15/1.

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