| abstract |
The invention relates to a method for producing betamimetics of formula (I), in which n represents 1 or 2; R<SUP>1</SUP> represents hydrogen, halogen, C<SUB>1-4</SUB> alkyl or O-C<SUB>1-4</SUB> alkyl; R<SUP>2</SUP> represents hydrogen, halogen, C<SUB>1-4</SUB> alkyl or O-C<SUB>1-4</SUB> alkyl, and; R<SUP>3</SUP> represents hydrogen, C<SUB>1-4</SUB> alkyl, OH, halogen, O-C<SUB>1-4</SUB> alkyl, O-C<SUB>1-4</SUB> alkylene-COOH, O-C<SUB>1-4</SUB> alkylene-COO-C<SUB>1-4</SUB>-alkyl. |