反应详情

To a solution of tert-butyl 4-(2-hydroxyethyl)pyridin-2-ylcarbamate (11) (6.00 g, 25.2 mmol) in THF (70 mL) was added sodium hydride (2.52 g, 63.0 mmol, 60 wt %) at 0° C. The bright yellow suspension was stirred for 20 min at 0° C. before the addition of 1-fluoro-4-nitronaphthalene (4.81 g, 25.2 mmol) in a single portion. After stirring at RT for 2 hr, water (100 mL) was added followed by EtOAc (100 mL). The solid formed between the layers was collected by filtration and the organic phase was washed with saturated aq NaHCO3(100 mL), brine (100 mL) and dried. The volatiles were removed to give an orange solid. The solids were combined and triturated from MeOH (50 mL) to give tert-butyl 4-(2-(4-nitronaphthalen-1-yloxy)ethyl)pyridin-2-ylcarbamate (12) as a yellow solid (11.0 g, 98%): m/z 410 (M+H)+ (ES+).

1. customThe solid formed between the layers
2. filtrationwas collected by filtration
3. washthe organic phase was washed with saturated aq NaHCO3(100 mL), brine (100 mL)
4. customdried
5. customThe volatiles were removed
6. customto give an orange solid
7. customtriturated from MeOH (50 mL)