Potassium Carbonate → 3-[6-(4-{6-[2-(1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-phenyl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-(5-{6-[4-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-naphthalen-2-yl}-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (248 mg, 0.438 mmol, 1.1 eq.), 3-(6-Bromo-1H-benzoimidazol-2-yl)-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (1 eq., 156 mg, 0.399 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (3%, 10 mg), tetrakis(triphenylphosphine)palladium (3%, 14 mg) and potassium carbonate (3.3 eq., 182 mg) in 4 mL DME and 2 mL water was heated to 90° C. under Argon for 1 hour. The reaction mixture was cooled and diluted in ethyl acetate and washed with saturated sodium bicarbonate solution. The organic layer dried (MgSO4), concentrated and purified by flash column chromatography (silica gel, 20 to 100% ethyl acetate/hexane) to give 3-[6-(4-{6-[2-(1-tert-Butoxycarbonyl-pyrrolidin-2-yl)-3H-imidazol-4-yl]-naphthalen-2-yl}-phenyl)-1H-benzoimidazol-2-yl]-2-aza-bicyclo[2.2.1]heptane-2-carboxylic acid tert-butyl ester (178 mg, yield 59%). LCMS-ESI−: calc'd for C46H50N6O4: 750.93. Found: 751.3 (M+H+).

Provenance & Evidence