4.8 g of 1-(3,4-dimethoxyphenyl)-2-nitropropene is dissolved in 70 mL of ethanol in a beaker immersed in an ice bath. With vigorous stirring, a slow addition of 1.8 grams of sodium borohydride over the course of 45 minutes is started. The temperature must be below 15°C. The suspension is stirred for 3o minutes in the ice bath and another 1h at room temperature. The reaction is completed by boiling it for a few seconds. The mixture is cooled down and acidified to a pH of 6 with hydrochloric acid. The mixture is filtered, washed with cold isopropyl alcohol and dried in open air.
Addition of the reducing agent
Boiling the mixture
The mixture after acidification
The pure product