Triethylamine → HCID 57786027, compound

Participants

Reaction Steps

To a solution of 1-[9-chloro-1-(2,4-dichlorophenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl]propan-1-ol (200 mg; 0.487 mmol), 3-hydroxy-3-methylbutanoic acid (74.4 g, 0.63 mmol), triethylamine (0.11 mL, 0.79 mmol) and 4-dimethylaminopyridine (64.0 mg, 0.524 mmol) in tetrahydrofuran (10.0 mL) was added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (144.9 mg, 0.76 mmol) at room temperature. The mixture was stirred at room temperature for 2 days. Water was added to the reaction mixture 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 25-60% ethyl acetate/n-hexane gradient mixture to give the title compound (103.3 mg, 0.20 mmol, 41%) as a colorless amorphous.

Provenance & Evidence