反应详情

Microwave heating. To a solution of 2-(dimethylamino)ethanol (339 mg, 3.80 mmol) in DMF (5 mL) was added sodium bis(trimethylsilyl)amide (4.75 mL, 1M solution in THF, 4.75 mmol). The mixture was stirred at room temperature for 15 min. 2-Chloro-5-nitropyridine (500 mg, 3.16 mmol) was then added. The vial was capped and subjected to microwave irradiation (150° C. for 10 minutes). The mixture was diluted with water (250 mL) and EtOAc (250 mL). The two layers were separated, and the aqueous layer extracted two more times with EtOAc. The organic extracts were combined, washed with water and brine, dried over sodium sulfate and evaporated to give the crude material as brown oil. Purification by column chromatography on silica gel using 5% methanol/methylene chloride yielded 2-(5-nitropyridin-2-yloxy)-N,N-dimethylethanamine as a light yellow solid (295 mg, 44%).

1. temperatureMicrowave heating
2. customThe vial was capped
3. customsubjected to microwave irradiation (150° C. for 10 minutes)
4. customThe two layers were separated
5. extractionthe aqueous layer extracted two more times with EtOAc
6. washwashed with water and brine
7. dry with materialdried over sodium sulfate
8. customevaporated
9. customto give the crude material as brown oil
10. customPurification by column chromatography on silica gel using 5% methanol/methylene chloride