反应详情

In analogy to Example 175, step 6, 3′-chloro-3-fluoro-4′-[3,3,3-trifluoro-2-hydroxy-2-(6-methoxy-pyridin-3-yl)-1-methyl-propyl]-biphenyl-4-carboxylic acid methyl ester (Example 176) was treated first with aqueous HCl in dioxane, followed by aqueous NaOH in tetrahydrofuran/methanol to give the title compound as a colorless solid. MS (m/e, ISP neg. ion)=468.1 [M−H+].