Hydrochloric Acid → N-(4-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)bicyclo[2.2.2]octan-1-yl)cyclopropanesulfonamide

Participants

Reaction Steps

To a flask containing tert-butyl 4-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)bicyclo[2.2.2]octan-1-ylcarbamate (0.175 g, 0.327 mmol) was added a solution of HCl (4 N in 1,4-dioxane, 5 mL). After about 2 h at ambient temperature, the reaction mixture was concentrated under reduced pressure. The crude amine hydrochloride was dissolved in DCM (10 mL) and TEA (0.36 mL, 2.6 mmol) was added to the reaction mixture followed by cyclopropanesulfonyl chloride (0.18 g, 1.3 mmol). After about 2 h at ambient temperature, DMF (3 mL) was added and the reaction mixture was concentrated under reduced pressure to remove DCM. After a further about 4 h at ambient temperature, EtOAc (20 mL) and saturated aqueous NaHCO3 (20 mL) was added to the reaction mixture. The organic layer was separated, dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The crude reaction mixture was purified by chromatography on silica gel using 20-80% EtOAc in DCM to provide N-(4-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)bicyclo[2.2.2]octan-1-yl)cyclopropanesulfonamide as a tan solid (0.025 g, 14%). LC/MS (Table 2, Method a) Rt=2.34 min; MS m/z: 540 (M+H)+.

Provenance & Evidence