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O
Cu(I),
ligand
N
N=N-N-
+
O
N
N
N
O
Cu(I)
O
2
+
+
N
O
O
S
O
SH
+
O
N
S
O
S
SH
+
Z
S
S
Z
S
O
+
O
S
SH +
Z
S
S
S
O
P
O
N
Z=
O
NEt
3
SH
+
OC N
S
H
O
SCHEME 1.3
Click reactions in polymer chemistry according to Becer, Schubert, et al. [7].
a)
b)
+
+
SCHEME 1.4
The use of the same click process on both sides of the sacrificial unit: (a)
different functionalities attached to the sacrificial unit; (b) same functionalities on both sides
of the sacrificial unit.
+
+
SCHEME 1.5
Use of two different click reactions.
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