中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 3-hydroxy-3-indolyl-2-oxindole | 33333-60-7 | C16H12N2O2 | 264.283 |
Symmetrical and unsymmetrical 3,3-di(aryl)indolin-2-ones have been synthesized by nano-SiO2 as green, heterogeneous, and reusable catalyst under solvent-free conditions at room temperature
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。
Under the catalysis of 1 mol% of Br2 or HBr at room temperature, indoles undergo a rapid reaction with 3-hydroxy-3-(indol-3-yl)indolin-2-ones to give asymmetric 3,3-di(indol-3-yl)indolin-2-ones with high efficiency and wide substrate scope. This is a rare example of Br2 acting as a Lewis acid catalyst. Theoretical calculations suggest that both the catalytic activity of the catalysts and the stability of reaction intermediates are responsible for the high efficiency of this reaction.