Water → HCID 57785876, compound

Temperature

0 °C

To a solution of 1-[9-chloro-1-(2-chloro-4-methoxyphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]-2,2,2-trifluoroethanol (100 mg, 0.224 mmol) in N,N-dimethylformamide (2.0 mL) was added sodium hydride (60% dispersion in mineral oil, 14 mg, 0.35 mmol) at 0° C. After the mixture was stirred at 0° C. for 0.5 hr, iodomethane (0.0697 mL, 1.12 mmol) was added to the reaction mixture at 0° C. The mixture was stirred at room temperature for 8 hr. Water was added to the reaction mixture at room temperature and the mixture was extracted with ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (79.1 mg, 0.172 mmol, 77%) as colorless crystals.

1. stirringThe mixture was stirred at room temperature for 8 hr
2. extractionthe mixture was extracted with ethyl acetate
3. washThe organic layer was washed with water and brine
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated in vacuo
6. customThe residue was purified by flash chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane

ORD record

ord-c78ec954b8944c9ba6e6dd0206a3b6f1

Source dataset

uspto-grants-2014_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08901141B2