Methane → 4'-[2-Ethoxy-4-ethyl-5-(hydroxyiminomethyl)imidazol-1-ylmethyl]biphenyl-2-carboxylic acid t-butyl ester

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Reaction Steps

Intermediate (17c) (3.5 g, 7.7 mmol) was dissolved in ethanol (100 mL, 2 mol). Pearlman's Catalyst, wet (0.1:0.4:0.5, palladium hydroxide:carbon black:water, 660 mg) was added. The mixture was degassed and stirred at room temperature under hydrogen for 3 hours. The palladium was filtered off and the solute was concentrated to yield intermediate (17d) (3.3 g). MS m/z: [M+H+] calcd for C26H3N3O4, 450.2; found 450.3.

Provenance & Evidence