反应详情

EDC (1.61 g, 8.4 mmol) was added portionwise to a stirred solution of 5′-chloro-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4-carboxylic acid hydrochloride (1.16 g, 4.19 mmol), DMAP (5 mg), HOBt (5 mg) and N,O-dimethylhydroxylamine hydrochloride (818 mg, 8.4 mmol) in dichloromethane (20 mL). Triethylamine (1.69 g, 2.33 mL, 16.8 mmol) was added dropwise, and the reaction mixture was stirred at room temperature overnight. The resulting solution was poured into water and extracted with ethyl acetate (3×). The combined organic phase was washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo to give 5′-chloro-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4-carboxylic acid, methoxy-methyl-amide as a white solid (1.05 g. 86%); 1H NMR (CDCl3, 300 MHz) δ 8.05 (d, J=2.5 Hz, 1H), 7.36 (dd, J1=9.0 Hz, J2=2.5 Hz, 1H), 6.57 (d, J=9.0 Hz, 1H), 4.25 (dt, J1=13.0 Hz, J2=3.0 Hz, 1H), 3.69 (s, 3H), 3.16 (s, 3H), 2.88 (m, 3H), and 1.78 (m, 4H); MS (+CI): m/z for C13H18ClN3O2: expected 283.1. found 284.2 (M+H)+.

1. extractionextracted with ethyl acetate (3×)
2. washThe combined organic phase was washed with saturated aqueous sodium chloride
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo