Processes for making zilpaterol and salts thereof, zilpaterol or salt thereof prepared by said processes and pharmaceutical composition comprising such zilpaterol

摘要

This invention generally relates to processes for making zilpaterol and salts thereof, as well as processes for making intermediates that, inter alia, may be used to make zilpaterol and salts thereof. The zilpaterol and salts prepared in accordance with this invention can be used to increase the rate of weight gain, improve feed efficiency, and/or increase carcass leanness in livestock, poultry, and fish.