反应详情

To a suspension of 4-(allyloxy)-5-bromo-2-chlorobenzoic acid 21 (5.0 g, 17.2 mmol) in CH2Cl2 (50 mL) were added N,O-dimethylhydroxylamine HCl (2.1 g, 20.6 mmol), EDCI (4.9 g, 25.8 mmol), HOBT (4.7 g, 34.4 mmol) and NMM (9.5 mL, 86.0 mmol). The reaction mixture was stirred at rt for 15 hours and evaporated in vacuo to remove volatiles. The mixture was extracted with EtOAc/H2O (100 mL/100 mL). The organic layer was dried over MgSO4, filtered and concentrated in vacuo. The residue was triturated with hexane (100 mL) and stirred at r.t. for 30 min. The solid was precipitated, filtered, washed with hexane (50 mL) and dried under high vacuum to obtain the desired product (5.5 g, 95%).

1. customevaporated in vacuo
2. customto remove volatiles
3. extractionThe mixture was extracted with EtOAc/H2O (100 mL/100 mL)
4. dry with materialThe organic layer was dried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue was triturated with hexane (100 mL)
8. stirringstirred at r.t. for 30 min
9. customThe solid was precipitated
10. filtrationfiltered
11. washwashed with hexane (50 mL)
12. customdried under high vacuum