Dimethylformamide → 2-(3{(2-Methoxy-6-methylpyridin-4-yl)-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamino]methyl}-5-oxo-4,5-dihydro-[1,2,4]triazol-1-yl}benzoic acid

Participants

Reaction Conditions

Reaction Steps

After adding 39 mg of 2-hydrazinobenzoic acid hydrochloride and 57 μl of triethylamine to a solution of 90 mg of 2-(2-methoxy-6-methylpyridin-4-yl)-2-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylimino]thioacetamide (Example (19b)) in 3 ml of DMF, the mixture was stirred at 85° C. for 16 hours under a nitrogen atmosphere. The reaction mixture was concentrated, and the residue was dissolved in 2 ml of a methanol:THF=1:1 mixed solvent. After adding 41 μl of acetic acid and 64 mg of sodium cyanotrihydroborate to the reaction mixture, the mixture was stirred at room temperature for 4 hours. After filtering the reaction mixture, it was purified by reverse-phase high performance liquid chromatography (acetonitrile-water, 0.1% acetic acid) to give 2-(3{(2-methoxy-6-methylpyridin-4-yl)-[4-(5-methyl-[1,2,4]oxadiazol-3-yl)phenylamino]methyl}-5-oxo-4,5-dihydro-[1,2,4]triazol-1-yl}benzoic acid (35 mg).

Provenance & Evidence