反应详情

To a mixture of 2-butyl-1-benzofuran-3-carbaldehyde (25 g, 0.124 mol) and sodium acetate (12.2 g, 0.124 mol) in methanol (100 mL) was added hydroxylamine hydrochloride (10.3 g, 0.149 mol) in water (25 mL) at 0° C. The mixture was stirred at rt for 2 h. Water (300 mL) was added to the reaction mixture and the product was extracted with EtOAc. The organic layer was dried and concentrated under vacuum to give crude 2-butyl-1-benzofuran-3-carbaldehyde oxime (25 g, 93%) as a light brown liquid.

1. extractionthe product was extracted with EtOAc
2. customThe organic layer was dried
3. concentrationconcentrated under vacuum