Hydrochloric Acid → HCID 57786329, Verbindung

Temperatur

0 °C

To a solution of 9-bromo-1-(4-methoxy-2-methylphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (249 mg, 0.622 mmol) in tetrahydrofuran (3 mL) was added trimethyl(trifluoromethyl)silane (0.276 mL, 1.87 mmol) and tetrabutylammonium fluoride (1.0 M solution in tetrahydrofuran, 0.124 mL, 0.124 mmol) at 0° C. After the mixture was stirred at 0° C. for 15 min, to the reaction mixture was added trimethyl(trifluoromethyl)silane (0.276 mL, 1.87 mmol) and tetrabutylammonium fluoride (1.0 M solution in tetrahydrofuran, 0.124 mL, 0.124 mmol) at 0° C. After the mixture was stirred at 0° C. for 15 min, to the mixture was added 1N hydrochloric acid (3 mL) at 0° C., and the reaction mixture was stirred at 0° C. for 10 min. The mixture was quenched with aqueous saturated sodium hydrogen carbonate and extracted with ethyl acetate. The combined organic layer 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 20-80% ethyl acetate/n-hexane gradient mixture to give the title compound as a yellow solid (241 mg, 0.512 mmol, 82%).

1. stirringAfter the mixture was stirred at 0° C. for 15 min, to the mixture
2. stirringthe reaction mixture was stirred at 0° C. for 10 min
3. customThe mixture was quenched with aqueous saturated sodium hydrogen carbonate
4. extractionextracted with ethyl acetate
5. washThe combined organic layer was washed with brine
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe residue was purified by flash column chromatography on silica gel eluting with a 20-80% ethyl acetate/n-hexane gradient mixture

ORD-Eintrag

ord-a7b5483c91874e10bdf32244386bb1fc

Quelldatensatz

uspto-grants-2014_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08785460B2