Synthesis of 1-(3,4-methylenedioxyphenyl)-2-nitropropene

Dissolve 60 g of piperonal in 320 mL of glacial acetic acid, add 60 mL of nitroethane and 60 g of cyclohexylamine. Leave the solution to react for 6h under the steam bath. Add 30 mL of water and cool the solution down to 0°C and collect the crystals, recrystallize with dichloromethane, evaporate and freeze to crystallize.

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