Table 3:
Aza-conjugate addition of phthalimide to ethyl acrylate in the presence of recycled C
s
2
C
O
3
/[bmim]Br.
Entry
Cycle
Time (min)
Yield
(
%
)
a
1
1st use
90
98
2
2nd use
90
96
3
3rd use
100
95
a
I
s
o
l
a
t
e
d
yield.