1,4-Cyclohexadiene → HCID 53372380, compound

Participants

Reaction Steps

To a solution of ethyl 4-{[1-(biphenyl-4-ylmethyl)-4,6-difluoro-5-{4′-[(4-hydroxypiperidin-1-yl)carbonyl]biphenyl-4-yl}-1H-benzimidazol-2-yl]oxy}cyclohexanecarboxylate (isomer B, 0.057 g, 0.074 mmol) and Pd(OH)2 (0.014 g, 0.019 mmol) in 0.8 mL of EtOAc and 0.4 mL of EtOH was added 1,4-cyclohexadiene (0.180 mL, 1.91 mmol). The resulting black suspension was microwaved at 130° C. for 2 h, then filtered through a Celite™ pad, and washed with EtOAc. The resulting filtrate was concentrated in vacuo to give a crude residue. The crude residue was dissolved in 2 mL of THF and treated with KOTMS (0.028 g, 0.222 mmol). The reaction mixture was stirred for 18 h at ambient temperature, and then concentrated. The resulting crude residue was purified by reverse phase Gilson™ HPLC (35-100% MeCN/H2O) to provide the title compound as a white solid. LCMS: calculated for C32H31F2N3O5 575.60, observed m/e 576.1 (M+H)+ (Rt 1.99/4 min). 1H NMR (500 MHz, CD3OD): 7.80 (d, 2H), 7.76 (d, 2H), 7.55 (d, 2H), 7.52 (d, 2H), 7.05 (d, 1H), 4.98-4.90 (m, 1H), 4.27-4.16 (m, 1H), 3.95-3.86 (m, 1H), 3.79-3.67 (m, 1H), 3.42-3.33 (m, 1H), 2.43-2.34 (m, 1H), 2.34-2.26 (m, 2H), 2.16-2.06 (m, 2H), 2.03-1.90 (m, 2H), 1.90-1.78 (m, 2H), 1.75-1.42 (m, 5H).

Provenance & Evidence