Chemistry Reference
In-Depth Information
NH
2
N
3
+
+
3
+
3N
2
+
H
2
O
H
NO
2
NH
2
Polyaminostyrene can undergo typical reactions of aromatic amines, such as diazotization [
226
].
The diazonium salt decomposes with ferrous ions to yield polymeric free-radicals:
HNO
2
Fe
H
NH
2
N
2
Cl
9.4.3.7 Metalation Reactions
Functional polystyrene derivatives are starting materials for further reactions in many multistep
syntheses. An example is a metalation of polystyrenes for use as intermediates [
227
]:
R
O
C
4
H
9
Li
R
I
Li
R
OH
R
Some other reactions of lithiated polystyrene are [
227
]:
PCl
RCN
2
Li
P
O
R
3
When polystyrenelithium is aminated by a reagent prepared frommethoxyamine and methyllithium,
two reaction mechanisms are possible. One may proceed via nitrene intermediates and the other one via
electrophilic nitrenium ions [
228
]. Many other reactions of polystyrenelithium can be found in the
literature [
229
-
232
]. Sodium metalated polystyrene reacts in a similar manner [
228
]:
