反应详情

To a stirred solution of 4-(4-nitronaphthalen-1-yloxy)pyridin-2-amine (10) (40.0 g, 135 mmol) and DIPEA (48.1 mL, 270 mmol) in DCM (600 mL) at 0° C., under nitrogen, was added dropwise methoxyacetyl chloride (18.53 ml, 203 mmol). The mixture was warmed to RT and after 1 hr a solution of ammonia (100 mL, 7 M in MeOH) was added and stirring continued for 30 min, during which time a precipitate formed. The mixture was evaporated in vacuo and water (1 L) was added to the residue to provide a red suspension. Glacial acetic acid was added dropwise until a yellow colour persisted (˜5 mL). The solid was collected by filtration and washed with water (300 mL) to afford 2-methoxy-N-(4-(4-nitronaphthalen-1-yloxy)pyridin-2-yl)acetamide (11) (44.1 g, 90%) as a yellow solid: m/z 354 (M+H)+ (ES+).

1. additionwas added
2. customa precipitate formed
3. customThe mixture was evaporated in vacuo and water (1 L)
4. additionwas added to the residue
5. customto provide a red suspension
6. filtrationThe solid was collected by filtration
7. washwashed with water (300 mL)