反应详情

A] In analogy to the procedures described in example 26B] and 26C], methyl-[2-methyl-6-(4-trifluoromethyl-phenyl)-pyridin-3-ylmethyl]-amine (example 123D]) was reacted with 3-(1-ethoxycarbonyl-1-methyl-ethoxy)-5-methoxy-benzoic acid (prepared from 3-hydroxy-5-methoxy-benzaldehyde [Journal of Organic Chemistry (1985), 50(13), 2236–40], by reaction with ethyl-bromoisobutyrate followed by oxidation with sodium chlorite in analogy to the procedures described in examples 52A] and 59A]) to give 2-(3-methoxy-5-{methyl-[2-methyl-6-(4-trifluoromethyl-phenyl)-pyridin-3-ylmethyl]-carbamoyl}-phenoxy)-2-methyl-propionic acid ethyl ester, which was subsequently saponified to yield the title compound as colorless solid.