This invention relates to a novel process for making dihydrotetrabenazines, and in particular (+)-α-dihydrotetrabenazine, novel synthetic intermediates for use in the process and processes for making the intermediates.

This invention relates to a novel process for making dihydrotetrabenazines, and in particular (+)-α-dihydrotetrabenazine, novel synthetic intermediates for use in the process and processes for making the intermediates.

This invention relates to a novel process for making dihydrotetrabenazines, and in particular (+)--dihydrotetrabenazine, novel synthetic intermediates for use in the process and processes for making the intermediates.

This invention relates to a novel process for making dihydrotetrabenazines, and in particular (+)--dihydrotetrabenazine, novel synthetic intermediates for use in the process and processes for making the intermediates.