The present invention relates to an improved process for the preparation of substituted 2-(4-carbonylmethoxy-optionally 2,5-disubstituted-phenyl)-acetaldehydes, in particular 2-(4-alkoxycarbonylmethoxy-optionally 2,5-disubstituted-phenyl)-acetaldehydes and their use in the synthesis of optionally substituted 2-[4-[2-[[-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl]-amino]ethyl]-optionally 2,5-disubstituted-phenoxy]acetic acid derivatives or the salts thereof, which may be used as pharmaceutically active substances.
本发明涉及一种改进的方法,用于制备取代的2-(4-羰基甲氧基-可选地2,5-二取代苯基)-
乙醛,特别是2-(4-烷氧羰基甲氧基-可选地2,5-二取代苯基)-
乙醛及其在合成可选地取代的2-[4-[2-[[-2-羟基-2-(
4-羟基苯基)-1-甲基乙基]-
氨基]乙基]-可选地2,5-二取代苯氧基]
乙酸衍
生物或其盐中的用途,这些衍
生物可用作药用活性物质。