反应详情

To 40% solution of methylamine in methanol (100 ml) with being stirred under ice cooling was added dropwise 3-bromo-4-fluorobenzylbromide (13.04 g; 48.7 mmol) in methanol (10 ml). The mixture was brought to room temperature, and stirred for 91 hours. The reaction mixture was concentrated under reduced pressure, and the residue was taken up in water. The mixture was alkalinized with sodium hydroxide, followed by extraction with ether (160 ml). The organic layer was dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform:methanol=1:0→10:1), to thereby yield 6.25 g of the target compound (yield: 58.9%).

1. customwas brought to room temperature
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. extractionfollowed by extraction with ether (160 ml)
4. dry with materialThe organic layer was dried over magnesium sulfate
5. customthe solvent was evaporated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (chloroform:methanol=1:0→10:1)