Ethyl Acetate → HCID 11705579, compound

Participants

Reaction Steps

Dissolve {6-[2-(2-chloro-6-fluoro-phenyl)-5-phenyl-3H-imidazol-4-yl]-3-nitro-pyridin-2-yl}-(2,2-dimethylpropyl)-amine (240 mg, 0.50 mmol) in 100% ethanol (10 mL) and add tin(II) dichloride dihydrate (564 mg, 2.50 mmol, 5.0 equiv). Heat the reaction mixture until starting material is consumed. Cool the reaction solution to room temperature, quench slowly with saturated aqueous NaHCO3. Add Celite® to the quenched reaction and filter the suspension on a Celite® pad with water and ethyl acetate washes. Separate the layers and wash the organic layer with saturated aqueous NaCl. Dry the organic layer with Na2SO4, filter, and concentrate under reduced pressure. Add 10% aqueous ethanol and cyanogen bromide (106 mg, 1.00 mmol, 2.0 equiv) to the resulting solid and stir overnight. Quench the reaction with saturated aqueous NaHCO3 (20 mL). Add ethyl acetate and water to dissolve all solids. Wash the organic layer three times with saturated aqueous NaCl, dry with Na2SO4, filter, and concentrate under reduced pressure. Subject the residue to medium pressure silica gel chromatography eluting with a gradient of 1.5-3% (2M ammonia in MeOH)/CH2Cl2 to provide 5-[2-(2-Chloro-6-fluoro-phenyl)-5-phenyl-3H-imidazol-4-yl]-3-(2,2-dimethylpropyl)-3H-imidazo[4,5-b]pyridin-2-ylamine as a yellow-green solid (196 mg, 60% yield).

Provenance & Evidence