Lithium Hydroxide → (2S)-3-(4-{[2-(4-chlorophenyl)-1,3-thiazol-4-yl]methoxy}-2-methylphenyl)-2-ethoxypropanoic acid

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In analogy to the procedure described in example 10 d], (2S)-3-{4-[2-(4-chloro-phenyl)-thiazol-4-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid methyl ester was treated with LiOH to obtain (2S)-3-{4-[2-(4-chloro-phenyl)-thiazol-4-ylmethoxy]-2-methyl-phenyl}-2-ethoxy-propionic acid as colorless solid, which was crystalized from hexane/AcOEt to afford colorless crystals. According to chiral HPLC of the corresponding methyl ester (Chiralcel-OJ), the enantiomeric excess amounts to 98.9%.

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