Chemistry Reference
In-Depth Information
(a)
TosOH
140°C
CH
2
OH
CH
2
OH
HOCH
2
C
CH
2
OH
+
Hyperbranched Polyester
CH
C
CO
2
H
3
(-H2O)
CH
2
OH
CH
2
OH
(c)
HO
2
C
(b)
CH
2
OH
O
(CH
2
)
10
O
OH
Me
C
CO
O (CH
2
)
5
CO
OH
x
CH
2
OH
HO
2
C
(d)
(e)
CO
2
H
HO
2
C
CH
2
CH
2
OH
HOCH
2
CH
2
H
N
N
N
N
N
CH
2
CH
2
OH
CO
2
H
Me
O
CO
X
O
Si
(f)
(g)
Me
Me
Me
Si
Me
O
C
ClCO
O
C
Me
Me
X = Cl, Imiduzole
O
CO X
Si
O
Me
Formula 11.4
Finally, syntheses of hb polycarbonates from monomers such as (f) and (g),
Formula
11.4
, catalyzed by AgF should be noted [
40
,
41
]. After hydrolysis of the
end groups OH-terminated polymers having DBs around 0.53 and Tgs around
200 C were obtained.
11.3 Polyamides and Polyamines
The present section deals with syntheses of polyamides via formation of amide
bonds. Other synthetic strategies are discussed in the preceding and in the fol-
lowing sections. The first approach described by Kim in 1992 [
42
], was based on
SOCl
2
as activation/condensing agent. 3,5-Diaminobenzoic acid and 5-amino
