Ammonium Chloride → HCID 66777794, compound

Participants

Reaction Steps

To a solution (100 mL) of 6-methoxy-1-methyl-1H-benzoimidazole (4.07 g) synthesized in the above-mentioned (2) in tetrahydrofuran was added a 1.6M solution (30.1 mL) of n-butyllithium in hexane at −78° C., and the mixture was stirred under nitrogen atmosphere for 30 min. A solution (50 mL) of N-methoxy-N-methylcyclohexanecarboxamide (5.15 g) synthesized in the above-mentioned (3) in tetrahydrofuran was added, and the mixture was stirred at −78° C. for 1 hr and at room temperature for 2 hr. Saturated aqueous ammonium chloride solution was added to quench the reaction, and the reaction mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/petroleum ether=1:5, volume ratio) to give the title object compound (5.80 g, 85%) as white crystals.

Provenance & Evidence