Table 15:
13C NMR Data for 7a; chemical shifts in ppm relative to TMS(1%) at room temperature in CDCl3.
Piperazine
Piperazine
No.
X
Aromatic
I
II
CH2(Ⅰ)
CH2(Ⅱ)
X
153.6,139.5,
7a
p-CO2CH3
130.1, 128.2
51.4
(a)
59.6
33.2
51.9(OMe)
127.9,126.7,
166.5(C=O)
125.7, 119.9
(a) not detected