METHOD FOR PRODUCING BETAMIMETICS

摘要

The present invention relates to a process for preparing betamimetics of formula 1, wherein n denotes 1 or 2; R¹ denotes hydrogen, halogen, C_1-4-alkyl or O-C_1-4-alkyl; R² denotes hydrogen, halogen, C_1-4-alkyl or O-C_1-4-alkyl; R³ denotes hydrogen, C_1-4-alkyl, OH, halogen, O-C_1-4-alkyl, O-C_1-4-alkylene-COOH, O-C_1-4-alkylene-COO-C_1-4-alkyl.