4'-[2-Ethoxy-5-(hydroxyiminomethyl)-4-vinylimidazol-1-ylmethyl]-3'-fluorobiphenyl-2-carboxylic acid t-butyl ester → 4'-[2-Ethoxy-4-ethyl-5-(hydroxyiminomethyl)imidazol-1-ylmethyl]-3'-fluorobiphenyl-2-carboxylic acid t-butyl ester

Participants

Reaction Steps

Compound B (1.0 g, 2.2 mmol) was dissolved in EtOH (54 mL, 940 mmol), and added to a flask containing palladium (200 mg, 2 mmol) in 10 mL of EtOH. The mixture was degassed and stirred under hydrogen for 1 hour. The palladium was filtered and the solvent was concentrated to yield compound C (1.0 g), which was immediately carried on to the next reaction.

Provenance & Evidence