Chemistry Reference
In-Depth Information
Iodine isocyanate additions result in approximately 40% yields. The products can undergo typical
reactions of the isocyanate group [
74
], as for instance:
I
[HX]
NaOH
N
I
HX NH
2
O
NH
as well as:
I
NH
3
N
H
2
N
N
I
H
O
O
N
O
NH
2
where HX is a halogen acid. The products exhibit enhanced heat stability [
74
].
Dipolar cycloadditions take place when nitrones or nitrile oxides add to butadiene rubber. Some of
the products contain isoxazolidine rings [
75
]:
R
OH
H
2
O
O
N
+
H
R
N
O
polybutadie
ne
O
R
N
N
(C
2
H
5
)
3
N
-HCl
OH
CN
O
Cl
polybutadiene
O
N
