A Clean, Simple, and Efficient Synthesis of 2-Substituted Aryl (Indolyl) Kojic Acid Derivatives by Kaolin/Ag Nanocomposite as a Reusable Catalyst: A Green Protocol

Table 6

Recycling studies of reaction between benzaldehyde, kojic acid, and indole in the presence of Kaolin/Ag nanocomposite to give product 4a.

Entry	Cycle	Time (min)	Yield %a
1	Fresh	60	98
2	1	60	92
3	2	60	89
4	3	60	85

aYields refer to isolated products.