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Mass fragmentation of Ethyl 4-[5-(4-chlorophenyl)-4, 5-dihydro-1H-pyrazol-
3-yl]-3, 5-dimethyl-1H-pyrrole-2-carboxylate (VGM-8):
30
N
H
N
Cl
H 3 C
O
N
H
N
C H 3
CH 3
H 3 C
O
O
N
H
CH 3
H 3
N N H
O
N
H
H 2
CN
H 3 C
O
N
H
N
2
1
1
9
H
N
N
O
N
H
N
H
N
CH 3
3
H 3 C
H
N
Cl
N
H 3 C
O
N CH 3
O H
7
8
N
H
H
N
N
H 3 C
O
O
N
H
4
5
6
O
N
H
N
H
N
N
N H
H 3 C
O
O
N
H
N
H
N
HO
O
N
H
HO
O
N
H
SPECTRAL DATA
Ethyl 4-[5-(4-Fluorophenyl)-4, 5-dihydro-1H-pyrazol-3-yl]-3, 5-dimethyl-1Hpyrrole-2-carboxylate
(VGM-1)
IR (KBr) cm -1 : 3206, 3145 (-NH, str.), 1556 (-NH, def.), 1392 (-C-N, str.), 1681
(-C=O, str.), 1510 (-C=C, str. of pyrrole), 1492 (-CH 2 def.), 1437 (-CH 3 , C-H def.),
2924 (-CH, asym. str. ), 2856 (-CH, sym. str.), 1238 (-CH 2 , ipd.), 796 (-CH 2 ,
oopd.), 1014-1089 (-C-O-C, sym, str.)
1 H NMR (δ ppm): 2.39 (3H,s), 2.46 (3H, s), 2.55 (2H, qt), 2.96 (1H, m), 3.86 (1H,
m), 4.48 (1H, t), 7.0-7.05 (2H, m), 7.34-7.38 (2H, t-t, J= 2.08, 2.08 Hz)
C, H, N (in %): Found: 65.67(C), 6.10(H), 12.72 (N), Cacld: 65.64(C), 6.12(H),
12.76 (N)