反应详情

NaH (7.0 g, 60% oil dispersion, 0.176 mol) was added portionwise over five minutes to a stirred slurry of 2-(hydroxymethyl)-α-(methoxyimino)-N-methyl-benzeneacetamide (35.8 g, 0.161 mol) in 700 mL THF. After the resulting mixture was stirred for 3.25 hours, 2,6-difluoropyridine (15.4 g, 0.134 mol) was added neat over a 20 minute period, and the mixture was stirred overnight at room temperature. Water (250 mL) was added, THF was removed in vacuo, and the aqueous residue was extracted three times with 250 mL CH2Cl2. The combined extracts were washed with brine (250 mL), filtered through Na2SO4, and concentrated in vacuo. The residue was purified by silica gel chromatography (5% CH3CN in CH2Cl2) to yield 2-[[[6-fluoro-2-pyridinyl]oxy]methyl]-α-(methoxyimino)-N-methyl-benzeneacetamide (33.2 g, 78%).

1. stirringthe mixture was stirred overnight at room temperature
2. customTHF was removed in vacuo
3. extractionthe aqueous residue was extracted three times with 250 mL CH2Cl2
4. washThe combined extracts were washed with brine (250 mL)
5. filtrationfiltered through Na2SO4
6. concentrationconcentrated in vacuo
7. customThe residue was purified by silica gel chromatography (5% CH3CN in CH2Cl2)