Hydrochloric Acid → HCID 178502308, compound

Participants

Reaction Conditions

Reaction Steps

(S)-tert-butyl 2-(7-bromo-1H-naphtho[1,2-d]imidazol-2-yl)pyrrolidine-1-carboxylate (1.50 g, 3.60 mmol) was dissolved in DCM (25 mL) and HCl (4 M solution in dioxane, 5 mL, 20 mmol) was added at once. After stirring for 3 h, the solution was concentrated under reduced pressure. The crude residue was treated with (S)-2-(methoxycarbonylamino)-3-methylbutanoic acid (631 mg, 3.60 mmol), HATU (1.37 g, 3.60 mmol) and DMF (18 mL). The stirred solution was cooled to 0° C. and DIPEA (1.9 mL, 10 mmol) was added dropwise. After stirring for 20 min, the reaction mixture was warmed to RT. After an additional 10 min, it was diluted with EtOAc (150 mL) and washed successively with saturated aqueous NaHCO3 and brine. The organics were dried over MgSO4, filtered and concentrated under reduced pressure. The crude residue was purified by silica column chromatography (0% to 33% MeOH/EtOAc) to afford the title compound (1.70 g, 100%).

Provenance & Evidence