反应详情

To a dimethyl sulfoxide (20.0 mL) solution of 2-(3-fluoro-4-((E)-2-nitro-vinyl)-phenoxymethyl)pyridine (1.20 g) described in Manufacturing Example 95-1-2 and acetic acid (1.00 mL) was added sodium borohydride (249 mg, 6.57 mmol) at room temperature while cooling appropriately under nitrogen atmosphere, which was stirred for 30 minutes at room temperature. Water was then added dropwise at room temperature while cooling appropriately. The reaction mixture was extracted with ethyl acetate, and the organic layer was washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure, followed by crystallization with an ethyl acetate-heptane system and filtration to obtain the title compound (614 mg, 50.7%).

1. temperaturewhile cooling appropriately under nitrogen atmosphere
2. temperaturewhile cooling appropriately
3. extractionThe reaction mixture was extracted with ethyl acetate
4. washthe organic layer was washed with water and saturated aqueous sodium chloride
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationThe filtrate was concentrated under a reduced pressure
8. customfollowed by crystallization with an ethyl acetate-heptane system and filtration