反应详情

温度

100 °C

To a solution of 3-chloroisonicotinoyl chloride (about 2.6 mmol) (prepared by General procedure F) in pyridine (5 mL) was added 3-chloro-4-isopropoxy-N-hydroxy-benzamidine (300 mg, 1.31 mmol) (prepared by General procedure B). The mixture was heated at 100° C. overnight. The solvent was removed under reduced pressure and the crude product was purified via normal phase silica gel chromatography (0-50% ethyl acetate/heptane gradient over 30 min) to give 3-(3-chloro-4-isopropoxyphenyl)-5-(3-chloropyridin-4-yl)-[1,2,4]-oxadiazole (323 mg, 70.3%).

1. customThe solvent was removed under reduced pressure
2. customthe crude product was purified via normal phase silica gel chromatography (0-50% ethyl acetate/heptane gradient over 30 min)