Hydrochloric Acid → HCID 57785957, compound

Participants

Reaction Steps

To a solution of 1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propyl{[tert-butyl(dimethyl)silyl]oxy}acetate (137.1 mg, 0.235 mmol) in tetrahydrofuran (5.0 mL) was added 1N hydrogen chloride (1.0 mL, 1.0 mmol) at room temperature. The mixture was stirred at room temperature for 1 hr. Aqueous sodium hydrogen carbonate (4.0 mL) was added to the reaction mixture at room temperature and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 50-100% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (88.0 mg, 0.188 mmol, 80%) as colorless crystals.

Provenance & Evidence