pyridine; potassium hydroxide Behandeln des Reaktionsprodukts mit konz. Schwefelsaeure;

1: 75 percent / acetonitrile; dioxane; tetrahydrofuran / 2 h / Heating 2: KOH / dioxane / 0.5 h / Heating View Scheme

1: 85percent KOH / pyridine / Heating 2: sulfuric acid, glacial acetic acid 3: 100 percent / dimethyldioxirane / acetone; CH2Cl2 / 46 h / -10 °C 4: 100 percent / CDCl3 / 24 h / Ambient temperature View Scheme