Stage 1. Synthesis of Piperonal.
Extraction of piperine from black pepper has been demonstrated previously.
Starting reagents and materials
5 g recrystallized piperine
100 + 50 ml THF
10 g Potassium permanganate + 200-300 ml water
800-1000 ml DCM
50-100 g anhydrous sodium sulfate
25 ml EtOH...
