对称和非对称的3,3-二(芳基)吲哚啉-2-酮已经通过纳米SiO2作为绿色、非均相和可重复使用的催化剂,在室温下无溶剂条件下,通过磁搅拌和研磨方法合成。还提出了一种可能的缩合机理。
A high yielding green protocol is described for the synthesis of 3,2 and 3,3-diheteroaromatic oxindole involving the condensation of isatin with indole or pyrrole in an aqueous medium under neutral conditions by supramoleculer catalysis by β-cyclodextrin. The β-cyclodextrin can be easily recovered and reused without any loss of activity.
This study focuses on the use of nano-NiO particles as green and inexpensive nanocatalysts for the synthesis of diindolyl oxindoles, an important class of potentially bioactive compounds.