Table 13: 13C NMR Data for 5a-e; chemical shifts in ppm relative to TMS(1%) at room temperature in CDCl3.
|
|
|
|
Piperazine |
|
|
|
No. |
X |
Aromatic |
Piperazine I |
II |
CH2 |
CH3 |
X |
5a |
p-CN |
153.9,137.6,135.8, |
52.2(br) |
(a) |
60.7 |
19.3 |
108.4(CN) |
133.1, 130.5 |
|
|
129.9,127.5,125.7, |
|
|
|
|
|
|
|
121.2, 119.5 |
|
|
|
|
|
|
|
154.2,137.6,135.9, |
|
|
|
|
|
5b |
p-CO2CH3 |
130.6, 130.4 |
52.4(br) |
(a) |
60.7 |
19.2 |
51.9(OMe) |
|
|
129.9,127.4,127.1, |
|
|
|
|
167.1(C=O) |
|
|
125.6, 120.4 |
|
|
|
|
5c |
p-Br |
149.2,137.3,135.6, |
52.0(br) |
(a) |
60.4 |
18.9 |
|
131.5, 130.1 |
|
|
|
129.5,126.9,125.2, |
|
|
|
|
|
|
|
121.9, 118.7 |
|
|
|
|
|
|
|
155.6,145.0,137.6, |
|
|
|
|
|
5d |
p-NO2 |
135.7, 130.5 |
52.2(br) |
43.0(br) |
60.6 |
19.2 |
|
|
|
129.9,127.4,125.6, |
|
|
|
|
|
|
|
124.8, 120.7 |
|
|
|
|
|
5e |
H |
150.6,137.7,136.1, |
52.2(br) |
(a) |
60.7 |
19.0 |
|
130.4, 129.8 |
|
|
|
128.9,127.3,126.1, |
|
|
|
|
|
|
|
125.6, 120.7 |
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