Dimethylamine, hydrochloride → 4-[2,6-dichloro-3-[N-methyl-N-[4-(methyl-carbamoyl)cinnamoylglycyl]amino]-benzyloxy]-2-ethyl-1-dimethylcarbamoylmethyl-1H-benzimidazole

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Reaction Steps

A solution of 1-carboxymethyl-4-[2,6-dichloro-3-[N-methyl-N-[4-(methylcarbamoyl)cinnamoylglycyl]amino]-benzyloxy]-2-ethyl-1H-benzimidazole (60 mg), dimethylamine hydrochloride (11.2 mg), 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (17.1 mg) and 1-hydroxybenzotriazole (18.6 mg) in dimethylformamide (1 ml) was stirred for 1 day at ambient temperature. To the reaction mixture was added water, and the mixture was extracted with chloroform. The organic layer was washed with saturated sodium bicarbonate solution, dried over magnesium sulfate, and concentrated in vacuo. The residue was purified by preparative thin layer chromatography (10% methanol-chloroform) to give 4-[2,6-dichloro-3-[N-methyl-N-[4-(methyl-carbamoyl)cinnamoylglycyl]amino]-benzyloxy]-2-ethyl-1-dimethylcarbamoylmethyl-1H-benzimidazole (46 mg) as amorphous.

Provenance & Evidence