HCID 57786105, compound → HCID 57786226, compound

Participants

Reaction Steps

n-Propylmagnesium bromide (2.0 M solution in tetrahydrofuran, 0.25 mL, 0.50 mmol) was added to a stirred solution of 9-chloro-1-(2,4-dichloro-6-methylphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-6-carbaldehyde (179 mg, 0.453 mmol) in tetrahydrofuran (2.0 mL) at 0° C., and the mixture was stirred at room temperature for 12 hr. The reaction was quenched by aqueous saturated ammonium chloride, and the mixture was extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 2-50% ethyl acetate/n-hexane gradient mixture. The filtrate was concentrated in vacuo to give the title compound as a colorless amorphous (rotamer 1; 72.3 mg, 0.165 mmol, 36%, rotamer 2; 68.7 mg, 0.157 mmol, 35%).

Provenance & Evidence