反应详情

To a suspension of (Z)-4-(2-methoxypyridine-4-carboamido)-4-oxobut-2-enoic acid 8 (0.2 g, 0.75 mmol) in CH3CN was added POCl3 (0.37 g, 2.4 mmol). The mixture was stirred under reflex for 16 hours, cooled to ambient temperature and concentrated under reduced pressure. The residue was dissolved in CH3CN, treated with a solution of N-amino-2,4-dichloro-N′-(2-chlorophenyl)benzamidine 4 (0.38 g, 1.2 mmol) in CH3CN and K2CO3 (0.38 g, 1.2 mmol). The mixture was stirred at ambient temperature for 1 hour, refluxed for 2 hours and filtered. The filtrate was concentrated. The residue was subjected to flash column chromatography (FCC) (50-60% EtOAc/hexanes) to afford the title compound 4-(5-((E)-2-(5-(2,4-dichlorophenyl)-4-(2-chlorophenyl)-4H-1,2,4-triazol-3-yl)vinyl)-1,3,4-oxadiazol-2-yl)-2-methoxypyridine as a white solid. Yield: 0.11 g, 28%.

1. concentrationconcentrated under reduced pressure
2. dissolutionThe residue was dissolved in CH3CN
3. stirringThe mixture was stirred at ambient temperature for 1 hour
4. temperaturerefluxed for 2 hours
5. filtrationfiltered
6. concentrationThe filtrate was concentrated