Trifluoroacetic acid → 2-{4-[1-(3-Ethoxy-4-methoxy-benzyl)-piperidin-4-ylcarbamoyl]-phenyl}-2-methyl-propionic acid methyl ester

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Reaction Steps

In analogy to the procedure described in example 50k), 2-methyl-2-[4-(piperidin-4-ylcarbamoyl)-phenyl]-propionic acid methyl ester [prepared from 4-[4-(1-methoxycarbonyl-1-methyl-ethyl)-benzoylamino]-piperidine-1-carboxylic acid tert-butyl ester by treatment with TFA in dichloromethane in analogy to the preparation described in example 50i)] was reacted with 3-ethoxy-4-methoxybenzaldehyde, sodium cyanoborohydride, N-ethyl-diisopropylamine and acetic acid in ethanol at 50° C. to yield the title compound as colorless foam. MS: 469.3 (MH+).

Provenance & Evidence