Potassium Carbonate → 2-{5-[4-(5-Trifluoromethanesulfonyloxy-naphthalen-1-yl)-phenyl]-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

2-{5-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (1.30 g, 2.96 mmol), Trifluoro-methanesulfonic acid 5-trifluoromethanesulfonyloxy-naphthalen-1-yl ester (982 mg, 2.31 mmol), Pd(PPh3)4 (134 mg, 0.116 mmol) and potassium carbonate (639 mg, 4.62 mmol) were suspended in toluene. After degassing with nitrogen for 28 min, the stirred suspension was heated to 100° C. for 18 hours. The reaction mixture was then cooled to RT, diluted with ethyl acetate (250 mL), washed with water, brine, dried over magnesium sulfate and concentrated. The resulting residue was purified by silica column chromatography (0% to 60% EtOAc/hexanes) to provide 2-{5-[4-(5-Trifluoromethanesulfonyloxy-naphthalen-1-yl)-phenyl]-1H-imidazol-2-yl}-pyrrolidine-1-carboxylic acid tert-butyl ester (1.09 g, 80%).

Provenance & Evidence