1426
M. BAKHERAD ET AL.
5,6-Diphenyl-3-(4-nitrobenzyl)imidazo[2,1-b]thiazole 4a
1H NMR (500 MHz, DMSO-d6 δ ppm): 4.25 (s, 2H, CH2), 6.90 (s, 1H, CH of thiazol),
7.15–7.55 (m, 9H, ArH), 7.70–8.10 (m, 5H, ArH); 13C NMR δ (125 MHz, DMSO-d6): 31.5,
111.0, 123.0, 124.9, 125.1, 127.9, 128.8, 129.3, 130.7, 131.4, 132.2, 132.8, 133.1, 133.5,
134.2, 146.9, 149.7; IR, υ (KBr disc): 1520, 1345 cm−1. Anal. Calcd. for C24H17N3O2S:
C, 70.06; H, 4.16; N, 10.21; S, 7.79%. Found: C, 70.24; H, 4.30; N, 10.38; S, 7.57%.
5,6-Diphenyl-3-(3-nitrobenzyl)imidazo[2,1-b]thiazole 4b
1H NMR (500 MHz, DMSO-d6 δ ppm): 4.23 (s, 2H, CH2), 6.69 (s, 1H, CH of thiazol),
7.10–7.45 (m, 10H, ArH), 7.60–7.90 (m, 4H, ArH); 13C NMR δ (125 MHz, DMSO-d6):
31.6, 110.7, 122.4, 125.4, 125.7, 128.0, 128.3, 128.9, 129.6, 130.3, 130.8, 131.2, 131.7,
132.5, 133.0, 133.4, 133.9, 148.0, 150.1; IR, υ (KBr disc): 1525, 1340 cm−1; Anal. Calcd.
for C24H17N3O2S: C, 70.06; H, 4.16; N, 10.21; S, 7.79%. Found: C, 70.29; H, 4.28; N,
10.05; S, 7.90%.
5,6-Diphenyl-3-(4-acetobenzyl)imidazo[2,1-b]thiazole 4c
1H NMR (500 MHz, DMSO-d6 δ ppm): 2.52 (s, 3H, CH3), 3.80 (s, 2H, CH2), 6.76
(s, 1H, CH of thiazol), 6.80–7.15 (m, 5H, ArH), 7.30–7.76 (m, 9H, ArH); 13C NMR δ
(125 MHz, DMSO-d6): 27.1, 33.8, 110.8, 124.1, 126.9, 127.1, 128.5, 128.7, 128.9, 129.5,
130.0, 132.1, 132.2, 134.8, 135.6, 142.0, 142.8, 149.1, 197.9; IR, υ (KBr disc): 1690 cm−1
;
Anal. Calcd. for C26H20N2OS: C, 76.44; H, 4.93; N, 6.86; S, 7.85%. Found: C, 76.65; H,
5.07; N, 6.65; S, 7.70%.
5,6-Diphenyl-3-(2-methyl-4-nitrobenzyl)imidazo[2,1-b]thiazole 4d
1H NMR (500 MHz, DMSO-d6 δ ppm): 2.35 (s, 3H, CH3), 4.20 (s, 2H, CH2), 6.82
(s, 1H, CH of thiazol), 6.95–7.50 (m, 8H, ArH), 7.65–7.87 (m, 5H, ArH); 13C NMR δ
(125 MHz, DMSO-d6): 19.0, 31.6, 111.3, 121.5, 124.6, 126.7, 127.1, 127.5, 128.5, 128.6,
129.1, 129.2, 129.5, 129.8, 130.4, 131.9, 131.9, 132.0, 132.5, 134.7, 138.5, 143.5, 146.6;
IR, υ (KBr disc): 1525, 1340 cm−1; Anal. Calcd. for C25H19N3O2S: C, 70.57; H, 4.50; N,
9.88; S, 7.54%. Found: C, 70.80; H, 4.64; N, 9.62; S, 7.71%.
5,6-Diphenyl-3-(4-chloro-3-nitrobenzyl)imidazo[2,1-b]thiazole 4e
1H NMR (500 MHz, DMSO-d6 δ ppm): 3.86 (s, 2H, CH2), 6.97 (s, 1H, CH of thiazol),
7.05–7.26 (m, 5H, ArH), 7.32–7.54 (m, 8H, ArH);13C NMR δ (125 MHz, DMSO-d6): 31.8,
110.6, 125.6, 126.9, 128.1, 128.2, 128.8, 128.9, 129.4, 130.5, 130.8, 131.5, 131.8, 132.8,
133.4, 133.8, 134.0, 147.9, 149.4; IR, υ (KBr disc): 1520, 1335 cm−1; Anal. Calcd. for
C24H16ClN3O2S: C, 64.64; H, 3.62; N, 9.42; S, 7.19%. Found: C, 64.42; H, 3.76; N, 9.62;
S, 7.36%.
5,6-Diphenyl-3-(4-chloro-2-nitrobenzyl)imidazo[2,1-b]thiazole 4f
1H NMR (500 MHz, DMSO-d6 δ ppm): 4.10 (s, 2H, CH2), 6.50 (s, 1H, CH of
thiazol), 6.80–7.25 (m, 8H, ArH), 7.30–7.45 (m, 4H, ArH), 7.92 (s, 1H, ArH); 13C NMR δ