Nanorod-Shaped Basic Al_𝟐O_𝟑 Catalyzed N,N-Diformylation of Bisuracil Derivatives: A Greener “NOSE” Approach

Table 3

Recycling study of nano-Al₂O₃.

Entry	No. of cycles	Time (min)	Yield (%)^b	TONs
1	Fresh	45	70	88
2	1st run	45	70	88
3	2nd run	45	70	88
4	3rd run	45	70	88
5	4th run	45	70	88
6	5th run	60	58	76
7	6th run	180	40	70

^aReaction conditions: 2 mmol of 2b, 12 mmol formic acid, and 7 mol% basic nano-Al₂O₃, 40°C. ^bYields refer to the isolated pure products.