Chemistry Reference
In-Depth Information
t
Bu
H
H
N
+
N
H
O
H
Ph
Ph
N
+
N
H
H
O
H
OH
OH
H
Ph
Ph
2 TFPB
-
+
H
+
O
H
O
MeO
MeO
DCM, -70 ˚C
1 : 22
15% ee
47% ee
80%
Scheme 3.47
Diels-Alder reaction in the presence of a C
2
-bis(amidinium) salt
