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N
3
N
3
O
O
O
N
3
P
O
N
3
P
O
NH
O
O
NH
O
N
O
N
N
3
P
H
N
O
O
P
N
3
O
N
N
3
P
N
O
O
P
N
3
N
O
N
N
3
P
H
N
O
O
P
N
3
O
HN
O
HN
O
P
N
3
O
P
N
3
O
O
O
N
3
P
N
3
P
P
N
3
i-Bu
i-Bu
P
i-Bu
N
N
N
P
=
N
Figure 6.3
Azaphosphatrane incorporated dendrimer as a strong base catalyst
10 mol%
PS-PAPT
+
NO
3
-
X
+
XH
Z
Z
MeCN, rt, 24 h
(1.26 equiv)
X = RNH, RR'N, RS
O
O
O
O
O
O
Me
Me
OMe
Me
OMe
PhHN
N
N
PhS
PhS
PhS
O
O
80%
99%
99%
99%
99%
99%
Scheme 6.10
Aza- or thia-Michael addition reactions of amines or thiols
