反应详情

A solution of 2,2-dimethyl-6-nitro-2H-1,4-benzoxazin-3(4H)-one (300 mg, 1.35 mmol, 1 equiv) in 5 mL of THF was added dropwise to mixture of NaH (81 mg, 2.03 mmol, 1.5 equiv., 60%) in 3 mL of THF at 0° C. The mixture was stirred at this temperature for 10 min. Then MeI (0.25 mL, 4.05 mmol, 3 equiv.) was added and the reaction was left at room temperature overnight. The reaction mixture was partitioned between EtOAc and water. The organic layer was separated and concentrated. The residue was purified by column chromatography using a mixture of EtOAC/hexane (1:4) as eluent to give 290 mg (Yield=91%) of product as a pale yellow solid.

1. waitthe reaction was left at room temperature overnight
2. customThe reaction mixture was partitioned between EtOAc and water
3. customThe organic layer was separated
4. concentrationconcentrated
5. customThe residue was purified by column chromatography
6. additiona mixture of EtOAC/hexane (1:4) as eluent