Cs₂CO₃/[bmim]Br as an Efficient, Green, and Reusable Catalytic System for the Synthesis of N-Alkyl Derivatives of Phthalimide under Mild Conditions

Table 3

Aza-conjugate addition of phthalimide to ethyl acrylate in the presence of recycled Cs₂CO₃/[bmim]Br.

Entry	Cycle	Time (min)	Yield (%)^a
1	1st use	90	98
2	2nd use	90	96
3	3rd use	100	95

^aIsolated yield.