反应详情

温度

40 °C

In a manner similar to that described in Paragraph J above, to a solution of N,N-diethylhydroxylamine (0.45 g, 5.0 mmol), N-(5-chloropyridin-2-yl)-2-[((4-(chloromethyl)-3-chlorothiophen-2-yl)carbonyl)amino]-3-methoxy-5-chlorobenzamide (0.51 g, 1.0 mmol), and DMSO (10 mL) was added K2CO3 (0.68 g, 4.9 mmol). The mixture was stirred at 40° C. for 2 days, then it was poured into water. The resulting mixture was extracted with CH2Cl2 (2×50 mL). The organic layer was washed with 1% K2CO3, brine, treated with charcoal and concentrated. Purification by silica gel chromatography using 10:1 CH2Cl2:CH3OH with 1% NH4OH followed by precipitation from CH2Cl2 and hexane afforded N-(5-chloropyridin-2-yl)-2-[((4-(((diethylamino)oxy)methyl)-3-chlorothiophen-2-yl)carbonyl)amino]-3-methoxy-5-chlorobenzamide, as a white solid; NMR (DMSO-d6) 8.35 (s, 1H), 8.20 (s, 1H), 8.10 (d, 1H), 7.90 (dd, 1H), 7.35 (s, 1H), 7.30 (s, 1H), 4.20 (s, 2H), 3.85 (s, 3H), 3.20-2.80 (m, 4H), 1.20 (t, 6H) ppm.

1. extractionThe resulting mixture was extracted with CH2Cl2 (2×50 mL)
2. washThe organic layer was washed with 1% K2CO3, brine
3. additiontreated with charcoal
4. concentrationconcentrated
5. customPurification by silica gel chromatography
6. customCH3OH with 1% NH4OH followed by precipitation from CH2Cl2 and hexane