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A mixture of 2,4-diethoxybenzaldehyde (5.0 g, 25.7 mmol), sodium acetate (4.23 g, 51.6 mmol), nitroethane (3.86 g, 51.4 mmol) in acetic acid (7 mL) was heated at reflux for 6 h. The mixture was then cooled and poured onto ice-water. The solids were filtered off, washed with water and dried. Chromatography of the residue over silica gel using 2-5% ethyl acetate in hexanes followed recrystallization in ethyl acetate gave 2,4-diethoxybenzonitrile (1.86 g, 38%).

1. temperaturewas heated
2. temperatureat reflux for 6 h
3. temperatureThe mixture was then cooled
4. additionpoured onto ice-water
5. filtrationThe solids were filtered off
6. washwashed with water
7. customdried
8. customrecrystallization in ethyl acetate