(2R,4S)-4-{(3,5-Bis-trifluoromethyl-benzyl)-[5-((E)-2-methoxycarbonyl-vinyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester → (2R,4S)-4-{(3,5-bis-trifluoromethyl-benzyl)-[5-(2-methoxycarbonyl-ethyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

(2R,4S)-4-{(3,5-Bis-trifluoromethyl-benzyl)-[5-((E)-2-methoxycarbonyl-vinyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (200 mg, 0.33 mmol) is dissolved in EtOH (5 mL) and hydrogenation reaction with 10% Pd/C. The residue is purified by column chromatography on silica gel (eluent: n-hexane/EtOAc) to give (2R,4S)-4-{(3,5-bis-trifluoromethyl-benzyl)-[5-(2-methoxycarbonyl-ethyl)-pyrimidin-2-yl]-amino}-2-ethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (198 mg, 99%).

Provenance & Evidence