Triethylamine → N-{1-[9-Chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propyl}-2,2-difluoroacetamide

A mixture of crude 1-[9-chloro-1-(2,4,6-trichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine (100 mg), difluoroacetic acid (0.0186 mL, 0.296 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (75.5 mg, 0.394 mmol), 1-hydroxybenzotriazole (53.2 mg, 0.394 mmol) and triethylamine (0.0824 mL, 0.591 mmol) in N,N-dimethylformamide (2 mL) was stirred at room temperature for 3 h, and diluted with ethyl acetate. The resultant mixture was washed with water and 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 0-30% ethyl acetate/n-hexane gradient mixture and NH silica gel eluting with a 30% ethyl acetate/n-hexane mixture to give the title compound as a colorless solid (42.4 mg, 0.0812 mmol).

1. washThe resultant mixture was washed with water and brine
2. dry with materialdried over anhydrous sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue was purified by flash column chromatography on silica gel eluting with a 0-30% ethyl acetate/n-hexane gradient mixture and NH silica gel eluting with a 30% ethyl acetate/n-hexane mixture

ORD-Eintrag

ord-6eb112651a754c9897ff4b7ef5095acf

Quelldatensatz

uspto-grants-2014_12

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08901141B2