反应详情

To a round bottom flask containing N-methyl-N-methoxy amine hydrochloride (878 mg, 9 mmol) in CH2Cl2 (6 mL), a solution of ClAlMe2 (9 mL, 1M, 9 mmol) was added at 0° C. dropwise. The solution was stirred at rt for 30 min. A solution of ethyl 4-bromophenylacetate (1.09 g, 4.05 mmol) was added dropwise at 0° C. The solution was stirred at rt for 1 h, quenched with sat. NH4Cl, and extracted with EtOAc (3×20 mL). The organic layer washed with brine, dried (Na2SO4) and concentrated. Purification via flash chromatography (0-50% EtOAc/hexanes) afforded 70A (1.03 g, 80%). MS (ESI) m/z 258.1 (M+H)+.

1. stirringThe solution was stirred at rt for 1 h
2. customquenched with sat. NH4Cl
3. extractionextracted with EtOAc (3×20 mL)
4. washThe organic layer washed with brine
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated
7. customPurification via flash chromatography (0-50% EtOAc/hexanes)