Betamimetics having a long-lasting activity, processes for preparing them, and their use as medicaments

摘要

A compound of formula 1chemistry chemdraw filechemistry mol file;wherein R³ is a benzyl group optionally substituted by a methoxy group; R⁴ is a hydrogen atom, or R³ and R⁴ together are a COCH₂O bridge, the carbonyl group of the bridge being bound to the nitrogen; and ;R² is a group selected from chemistry chemdraw filechemistry mol file;wherein ;R⁵ is a dimethylamino, methoxy, or butoxy group, ;X is a nitrogen or a carbon atom, and ;R⁶ is a methoxyphenyl group, if X is nitrogen, or is an anellated phenyl ring also linked to X, if X is carbon, ;or the individual optical isomers, mixtures of the individual enantiomers, racemates, or acid addition salt thereof.