Water → Methyl {1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propyl}carbamate

温度

0 °C

To a solution of 1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-amine (100 mg, 0.24 mmol) and triethylamine (0.10 mL, 0.72 mmol) in tetrahydrofuran (5.0 mL) was added methyl chloroformate (0.0377 mL, 0.488 mmol) at 0° C. The mixture was stirred at 0° C. for 1 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 brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 35-65% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (31.5 mg, 0.067 mmol, 28%) as colorless crystals.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue was purified by flash chromatography on silica gel eluting with a 35-65% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane

ORDレコード

ord-1061626c8b0a4f86898bdca000791df9

出典データセット

uspto-grants-2014_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08901141B2