Potassium Carbonate → (1R,3S,5R)-tert-butyl 3-(5-(2-(2-((1R,3S,5R)-2-(tert-butoxycarbonyl)-2-azabicyclo[3.1.0]hexan-3-yl)-1H-benzo[d]imidazol-6-yl)quinoxalin-6-yl)-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

Pd(OAc)2 (2.67 mg, 0.012 mmol) was added to a degassed solution of 2-(2-((1R,3S,5R)-2-(tert-butoxycarbonyl)-2-azabicyclo[3.1.0]hexan-3-yl)-1H-benzo[d]imidazol-6-yl)quinoxalin-6-ylboronic acid (56 mg, 0.119 mmol), (1R,3S,5R)-tert-butyl 3-(5-iodo-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate (66.9 mg, 0.178 mmol), dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine (9.76 mg, 0.024 mmol) and K2CO3 (49.3 mg, 0.356 mmol) in THF (1 mL) and water (0.25 mL) and the mixture was stirred at 120° C. for 2 h. The reaction was diluted with MeOH, filtered and purified by prep HPLC (H2O-MeOH with 10 mM NH4OAc buffer) to yield (1R,3S,5R)-tert-butyl 3-(5-(2-(2-((1R,3S,5R)-2-(tert-butoxycarbonyl)-2-azabicyclo[3.1.0]hexan-3-yl)-1H-benzo[d]imidazol-6-yl)quinoxalin-6-yl)-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate (32 mg, 0.047 mmol) as yellow solid. LC-MS retention time 1.89 min; m/z 675 [M+H]+. (Column PHENOMENEX® Luna 3.0×50 mm S10. Solvent A=95% water/5% methanol/10 mM ammonium acetate. Solvent B=5% water/95% methanol/10 mM ammonium acetate. Flow Rate=4 mL/min. Start % B=0. Final % B=100. Gradient Time=2 min. Wavelength=220). 1H NMR (400 MHz, MeOD) δ ppm 9.44 (s, 1H), 8.45 (br s, 1H), 8.39 (s, 1H), 8.23 (d, J=8.8 Hz, 1H), 8.18 (d, J=8.5 Hz, 1H), 8.13 (d, J=8.8 Hz, 1H), 7.69-7.76 (m, 1H), 7.64 (s, 1H), 4.69-4.78 (m, 1H), 4.49-4.57 (m, 1H), 3.56-3.70 (m, 2H), 2.50-2.73 (m, 2H), 2.31-2.47 (m, 2H), 1.67-1.86 (m, 2H), 1.31 (br s, 18H), 0.82-0.95 (m, 2H), 0.54-0.75 (m, 2H).

Provenance & Evidence