Methylamine → 3-Benzyloxy-1-(2,2-dimethoxyethyl)-5-methylcarbamoylmethyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid 3-chlorobenzylamide

Participants

Reaction Steps

To a solution of [5-benzyloxy-6-(3-chlorobenzylcarbamoyl)-1-(2,2-dimethoxyethyl)-4-oxo-1,4-dihydropyridin-3-yl]acetic acid (25 mg) obtained in Example 191, Step 1 in dimethylformamide (0.2 ml), were successively added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (19 mg), 1-hydroxybenzotriazole hydrate (15 mg) and methylamine (2M tetrahydrofuran solution) (0.073 ml), and the mixture was stirred at room temperature for 2 hr. The obtained reaction mixture was applied as it was to silica gel thin layer chromatography (chloroform:methanol=10:1) and crystallized from ethyl acetate-diisopropyl ether to give 3-benzyloxy-1-(2,2-dimethoxyethyl)-5-methylcarbamoylmethyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid 3-chlorobenzylamide (22 mg).

Provenance & Evidence