PROCESS FOR PREPARING INTERMEDIATES FOR THE SYNTHESIS OF OPTICALLY ACTIVE BETA-AMINO ALCOHOLS BY ENZYMATIC REDUCTION AND NOVEL SYNTHESIS INTERMEDIATES

摘要

Subject-matter of the present invention is a process for preparing intermediates for the synthesis of optically active beta-amino alcohols by enzymatic reduction of the corresponding beta-amino ketones. Subject-matter of the invention are also said novel synthesis intermediates and the use thereof in the preparation of active pharmaceutical ingredients, among which vilanterol and the salts thereof.