Résumé Only 10 mol% of l-Proline in ethanol proved to be a very efficient catalyst for the one-pot synthesis of a wide variety of highly substituted tetrahydrobenzo[c]acridin-8(7H)-ones at room temperature. The key advantages of this process are high yields, cost effectiveness of the catalyst, easy work-up and the products can be directly recrystallized from hot ethanol.
事实证明,
乙醇中只有 10 摩尔的 l-脯
氨酸是一种非常有效的催化剂,可在室温下一次合成多种高取代的四氢苯并[c]
吖啶-8(7H)-酮。该工艺的主要优点是产率高、催化剂成本低、易于操作,而且产品可直接从热
乙醇中重结晶。