22- Method for producing 22-difluoroethylamine derivatives by imine hydrogenation

摘要

There is provided a process for the preparation of 2,2-difluoroethylamine derivatives, wherein a compound of formula (IV) is hydrogenated with a corresponding 2,2-difluoroethylamine derivative of formula (III) In the above formula,A, R^One And R²The radicals are each as defined in the detailed description.