反应详情

To a mixture solution of N-methyl benzylamine (11 g) in dichloromethane and an aqueous solution containing sodium bicarbonate (16 g) was added dropwise 4-fluorophenyl acetyl chloride (12 g) at room temperature with vigorously stirring. After stirring for 1 hour, the organic layer was separated and washed with 2N hydrochloric acid water, water, an aqueous solution of 2N sodium hydroxide and water, in this order. The organic layer was dried with anhydrous magnesium sulfate, and the colorless oily matter (18 g) was obtained. To a suspension of 4 lithium aluminum hydride (4.5 g) in tetrahydrofuran (250 mL) was added dropwise the oily substance (18 g) obtained above in tetrahydrofuran (250 mL) After stirring for 1 hour, water (4.5 mL), an aqueous solution of 15% sodium hydroxide (4.5 mL), and water (13.5 mL) were added in this order, and the resulting precipitate was removed by filtration. The residue that was obtained by evaporated the filtrate in vacuo was purified with NH silica gel (hexane/ethyl acetate), and the colorless oily matter (13.6 g) was obtained. This oily substance was dissolved in methanol (200 mL), a catalytic reduction by 5% palladium-carbon (1 g) was carried out at 50° C. under hydrogen atmosphere, and the title compound (8.55 g) was obtained as a light brown oily substance.

1. stirringAfter stirring for 1 hour
2. customthe organic layer was separated
3. washwashed with 2N hydrochloric acid water, water
4. dry with materialThe organic layer was dried with anhydrous magnesium sulfate
5. customthe colorless oily matter (18 g) was obtained
6. additionwas added dropwise the oily substance (18 g)
7. stirringAfter stirring for 1 hour
8. customthe resulting precipitate was removed by filtration
9. customThe residue that was obtained
10. customby evaporated the filtrate in vacuo
11. customwas purified with NH silica gel (hexane/ethyl acetate)
12. customthe colorless oily matter (13.6 g) was obtained
13. customwas carried out at 50° C. under hydrogen atmosphere