反应详情

A solution of 4-(diethoxymethyl)benzaldehyde (6.8 g, 32.69 mmol) and dimethylamine in 33 wt. % solution in water (9.25 g, 98 mmol) in methanol (200 mL) was stirred at room temperature for overnight. Sodium borohydride (1.85 g, 49 mmol) was added by portions with ice cooling. After the addition, the mixture was stirred at room temperature for 4 hr. The mixture was quenched with water (100 mL) and extracted with ethyl acetate (100 ml×3). The extract was dried over anhydrous sodium sulfate and concentrated to give crude title compound (7.0 g, yield 90%), which was used in the next step without further purification. LC-MS (ESI) m/z: 238 (M+1)+.

1. additionAfter the addition
2. customThe mixture was quenched with water (100 mL)
3. extractionextracted with ethyl acetate (100 ml×3)
4. dry with materialThe extract was dried over anhydrous sodium sulfate
5. concentrationconcentrated