Various 3-indolyl-3-hydroxy oxindoles were prepared for thefirst time by supramolecular catalysis involving the reactionof
![](/images/gif<font color=)
chars/beta2.gif" BORDER=0 ALIGN="middle">-CD:isatin complexes with indoles under neutral conditions in water.
![](/images/gif<font color=)
chars/beta2.gif" BORDER=0 ALIGN="middle">-Cyclodextrin can be recovered and reuseda number of times without loss of activity.