Acetyl chloride → N-{1-[9-Chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]-2,2,2-trifluoroethyl}acetamide

To a mixture of 1-[9-chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]-2,2,2-trifluoroethanamine (80.0 mg, 0.165 mmol) and triethylamine (0.0460 mL, 0.330 mmol) in tetrahydrofuran (2 mL) was added acetyl chloride (0.0141 mL, 0.198 mmol) at 0° C. The resultant mixture was stirred at room temperature for 30 min and diluted with aqueous sodium bicarbonate. The resultant mixture was extracted with ethyl acetate. The extract was washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture to give the title compound as a colorless solid (82.2 mg, 0.156 mmol, 95%).

1. extractionThe resultant mixture was extracted with ethyl acetate
2. washThe extract was washed with brine
3. dry with materialdried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture

ORD record

ord-2d03cf4ea71a4f939fdeb57ae8eeb1b3

Source dataset

uspto-grants-2014_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08901141B2