Abstract
Tungstic acid was used as a low-cost and readily available heterogeneous catalyst for the synthesis of 3,3-bis(1H-indol-3-yl)indolin-2-one derivatives from indoles. The reaction parameters, including catalyst quantity, solvents, temperature, and time were optimized. The present method has several advantages, such as mild conditions, simple work-up, elimination of anhydrous condition, easy recovery of catalyst and its recyclability as compared with existing methods.
摘要
钨酸被用作一种低成本且易得的杂相催化剂,用于合成3,3-双(1H-吲哚-3-基)吲哚-2-酮衍生物。优化了反应参数,包括催化剂用量、溶剂、温度和时间。与现有方法相比,该方法具有多种优点,如条件温和、简单操作、无需无水条件、易于回收催化剂以及可循环利用。