Potassium Carbonate → Ethyl 3-{[5-(biphenyl-4-yl)-1-(biphenyl-4-ylmethyl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclopentanecarboxylate

Participants

Reaction Conditions

Reaction Steps

A solution of ethyl 3-{[1-(biphenyl-4-ylmethyl)-4,6-difluoro-5-iodo-1H-benzimidazol-2-yl]oxy}cyclopentanecarboxylate (0.290 g, 0.481 mmol), biphenylboronic acid (0.105 g, 0.530 mmol), and Pd(PPh3)4 (22 mg, 0.019 mmol) in 4.8 mL of DMF was treated with a 1 M solution of K2CO3 (0.960 mL). The resulting yellow solution was heated at 120° C. for 45 min, and then diluted with EtOAc and H2O. The layers were separated and the aqueous layer was extracted with EtOAc. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated. Purification of the resulting residue by flash chromatography (0-25% EtOac/hexanes) afforded the desired compound as a white solid. LCMS: calculated for C40H34F2N2O3 628.71, observed m/e 629.1 (M+H)+ (Rt 2.82/4 min).

Provenance & Evidence