V. Patil et al. / European Journal of Medicinal Chemistry 45 (2010) 4539e4544
4543
(75 MHz, DMSO-d6,
d
): 167.4 (C]O), 166.9 (C]O), 165.1, 164.4
chromatography: Chloroform: Ethanol (10:0.3). Yield 51%, yellow
powder, mp 280e281 ꢂC. IR [KBr v cmꢀ1]: 3419(NeH), 1731 (C]O),
(C]O), 160.3, 159.3, 137.4, 137.2, 134.1, 132.7, 132.1, 131.8, 131.6,
128.2, 127.6, 127.1, 126.9, 126.0, 123.7, 120.7, 116.5, 116.1, 115.3, 65.7.
Calc. for C24H16N2O4S2, %: C, 62.59; H, 3.50; N, 6.08. Found, %: C,
62.28; H, 3.56; N, 5.71.
1674 (C]O), 1172,1089 (CeO). 1H NMR (300 MHz,
d, ppm, DMSO-
d6): 12.8 (s 1H, eCOeNHeCOe), 10.4 (s 1H, eNHe), 7.94
(d, J ¼ 7.8 Hz, 1H, aromatic proton), 7.9 (s 1H, benzylidene proton),
7.77 (d, J ¼ 7.5 Hz, 1H, aromatic proton), 7.56 (d, J ¼ 8.4 Hz, 2H,
aromatic protons), 7.42e7.48 (m 1H, aromatic proton), 7.30e7.35
(m 1H, aromatic proton), 6.95 (d 2H, aromatic protons), 4.68 (s 2H,
4.1.3.2. N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-
yl)-2-[4-[(2,4-dioxo thiazolidin-5-ylidene) methyl] phenoxy] acet-
amide (3b). Eluent used for column chromatography: Hexane: Ethyl
acetate (3:2). Yield 44.5%, pale yellow powder, mp 224e225 ꢂC. IR
[KBr v cmꢀ1]: 3261 (NeH), 1735 (C]O), 1679 (C]O), 1149, 1095
eCH2e). 13C NMR (75 MHz, DMSO-d6,
d): 172.1, 167.3 (C]O), 165.7
(C]O), 165.4 (C]O), 160.4, 157.5, 148.5, 132.8, 131.5, 126.3, 126.1,
123.8, 123.6, 121.8, 121.7, 120.6, 116.5, 116.2, 61.2. Calc. for
C19H13N3O4S2, %: C, 55.46; H, 3.18; N, 10.21. Found, %: C, 55.81; H,
3.42; N, 9.90.
(CeO). 1H NMR (300 MHz,
d, ppm, DMSO-d6): 10.4 (s 1H,
eCOeNHeCOe), 9.6 (s 1H, NH), 7.9 (s 1H, benzylidene proton), 7.5
(m 4H, aromatic protons), 7.35 (m 3H, aromatic protons), 6.95
(d, J ¼ 8.7 Hz, 2H, aromatic protons), 4.45 (s 2H, eCH2e), 3.04 (s 3H,
4.1.3.7. 2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy]-N-
(5-nitrothiazol-2-yl) acetamide (3g). Solvent used for recrystalliza-
tion: Ethanol: Yield 50%, yellow shiny powder, mp 254e256 ꢂC. IR
[KBr v cmꢀ1]: 1716 (C]O), 1664 (C]O), 1348 (CeN), 1286, 1176
CH3eN <), 2.1 (s 3H, eCH3). 13C NMR (75 MHz, DMSO-d6,
d): 167.3
(C]O), 165.5 (C]O), 164.8 (C]O), 161.5 (C]O), 160.3, 152.1, 134.9,
133.9, 132.7, 129.1, 126.4, 123.8, 123.7, 116.5, 106.6, 66.8, 35.9, 11.2.
Calc. for C23H20N4O5S, %: C, 59.47; H, 4.34; N, 12.06. Found, %: C,
59.37; H, 4.52; N, 12.64.
(CeO). 1H NMR (300 MHz,
d, ppm, DMSO-d6): 13.59 (bs 1H,
eCOeNHeCOe), 10.44 (s 1H, eNHe), 8.78 (s 1H, tiazolyl proton),
7.9 (s 1H, benzylidene proton), 7.53 (d, J ¼ 8.4 Hz, 2H, aromatic
protons), 6.95 (d, J ¼ 8.7 Hz, 2H, aromatic protons), 4.7 (s 2H,
4.1.3.3. 2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy]-N-
(5-methylthiazol-2-yl) acetamide (3c). Eluent used for column chro-
matography: Benzene: Methanol (10:0.25). Yield 48.0%, pale yellow
powder, mp 233e235 ꢂC. IR [KBr v cmꢀ1]: 3321 (NeH), 1790 (C]O),
eCH2e). 13C NMR (75 MHz, DMSO-d6,
d): 172.8 (C]O),167.4 (C]O),
165.7 (C]O), 160.2, 145.8, 136.7, 133.7, 132.7, 127.4, 123.9, 116.8,
116.5, 64.2.Calc. for C15H10N4O6S2, %: C, 44.33; H, 2.48; N, 13.79.
Found, %: C, 43.95; H, 2.42; N, 13.48.
1635 (C]O), 1589 (C]N), 1153,1045 (CeO). 1H NMR (300 MHz,
d,
ppm, DMSO-d6): 12.4 (bs 1H, eNH), 10.40 (s 1H, eCOeNHeCOe),
7.9 (s 1H, benzylidene proton), 7.52 (d, J ¼ 9.0 Hz, 2H, aromatic
protons), 7.16 (s 1H, thiazolyl proton), 6.94 (d, J ¼ 8.4 Hz, 2H,
aromatic protons), 4.88 (s 2H, eCH2e), 2.4 (s 3H, eCH3). 13C NMR
4.1.3.8. 2-[2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy]
acetyl]-1,2-benzothiazol-3(2H)-one-1,1-dioxide (3h). Eluent used for
column chromatography: Hexane: Ethyl acetate (2:1).Yield 40%, pale
yellow powder, mp 246e248 ꢂC. IR [KBr v cmꢀ1]: 1695, 1743 (C]O),
(75 MHz, DMSO-d6, d): 169.2 (C]O), 167.4 (C]O), 166.8 (C]O),
165.7, 160.3, 157.7, 140.1, 134.2, 132.8, 123.8, 120.0, 116.5, 65.7, 11.1.
Calc. for C16H13N3O4S2, %: C, 51.19; H, 3.49; N, 11.19. Found, %: C,
50.85; H, 3.75; N, 11.15.
1319 (O]S]O), 1226, 1172 (CeO). 1H NMR (300 MHz,
d, ppm,
DMSO-d6): 10.45 (s 1H, eCOeNHeCOe), 7.93 (s 1H, benzylidene
proton), 7.68 (d, J ¼ 9.0 Hz, 2H, aromatic protons), 7.53 (d, J ¼ 8.4 Hz,
2H, aromatic protons), 7.34 (d, J ¼ 8.7 Hz, 2H, aromatic protons),
4.1.3.4. 5-[4-[2-(2-Butyl-4-oxo-1,3-diazaspiro[4,4]non-1-en-3-yl)-2-
oxoethoxy] benzylidene] thiazolidine-2,4-dione (3d). Eluent used for
column chromatography: Hexane: Ethyl acetate (2:1). Yield 97.0%,
pale yellow powder, mp 236e237 ꢂC. IR [KBr v cmꢀ1]: 3406 (NeH),
6.94 (d, J ¼ 8.4 Hz, 2H, aromatic protons), 4.70 (s 2H, eCH2e). 13
C
NMR (75 MHz, DMSO-d6, d): 168.1 (C]O), 167.3 (C]O), 167.0 (C]
O), 165.1, 160.5, 151.0, 134.9, 132.9, 132.4, 131.5, 131.3, 130.7, 124.0,
123.6, 122.5, 116.5, 115.6, 62.8. Calc. for C19H12N2O7S2, %: C, 51.35; H,
2.72; N, 6.30. Found, %: C, 51.10; H, 2.57; N, 6.64.
1724 (C]O), 1677 (C]O), 1155 (CeO). 1H NMR (300 MHz,
d, ppm,
DMSO-d6): 10.83 (s 1H, eCOeNHeCOe), 7.88 (s 1H, benzylidene
proton), 7.5 (d, J ¼ 8.4 Hz, 2H, aromatic protons), 6.95 (d, J ¼ 8.4 Hz,
2H, aromatic protons), 4.73 (s 2H, eCH2e), 1.2e1.82 (m 17H,
4.1.3.9. 2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy] -N-
(pyridine-2-yl) acetamide (3i). Eluent used for column chromatog-
raphy: Hexane: Ethyl acetate (2:1).Yield 32.1%, yellow powder, mp
177e178 ꢂC. IR [KBr v cmꢀ1]: 3465 (NeH), 1735 (C]O), 1677 (C]O),
aliphatic and alicyclic protons). 13C NMR (75 MHz, DMSO-d6,
d):
174.5 (C]O), 172.7 (C]O), 168.0 (C]O), 167.1 (C]O), 165.3, 160.3,
134.1, 132.8, 123.8, 116.5, 116.2, 66.5, 45.7, 35.8, 34.6, 27.1, 23.8, 21.8,
13.8. Calc. for C23H25N3O5S, %: C, 60.64; H, 5.53; N, 9.22. Found, %: C,
60.47; H, 5.56; N, 9.60.
1141,1085 (CeO). 1H NMR (300 MHz,
d, ppm, DMSO-d6): 10.97 (s 1H,
eCOeNHeCOe), 10.41(s 1H, eNHe), 8.34 (d, J ¼ 4.2 Hz, 1H,
aromatic protons), 7.69e7.98 (m 1H, aromatic protons), 7.88 (s
1H, benzylidene proton), 7.76e7.87 (m 1H, aromatic proton), 7.52
(d, J ¼ 8.7 Hz, 2H, aromatic protons), 7.11e7.15 (m 1H, aromatic
proton), 6.94 (d, J ¼ 8.4 Hz, 2H, aromatic protons), 4.57 (s 2H,
4.1.3.5. 2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy]-N-
[3-(trifluromethyl) phenyl] acetamide (3e). Eluent used for column
chromatography: Hexane: Ethyl acetate (3:2). Yield 97%, pale yellow
power, mp 235e236 ꢂC. IR [KBr v cmꢀ1]: 3317 (NeH), 1731 (C]O),
eCH2e). 13C NMR (75 MHz, DMSO-d6,
d): 167.3 (C]O),165.5 (C]O),
164.8 (C]O), 160.3, 151.4, 148.1, 138.4, 134.1, 132.7, 123.8, 119.8,
116.5,116.3,113.5, 66.9. Calc. for C17H13N3O4S, %: C, 57.46; H, 3.69; N,
11.82. Found, %: C, 57.84; H, 4.00; N, 11.60.
1674 (C]O), 1146, 1176 (CeO). 1H NMR (300 MHz,
d, ppm, DMSO-
d6): 10.75 (s 1H, eCOeNHeCOe), 10.4 (s 1H, eNHe), 8.05 (s 1H,
aromatic proton), 7.9 (s 1H, benzylidene proton), 7.42e7.75 (m 5H,
aromatic protons), 6.9 (d, J ¼ 9.0 Hz, 2H, aromatic protons), 4.5
4.1.3.10. 2-[4-[(2,4-Dioxothiazolidin-5-ylidene) methyl] phenoxy]-N-
(5-methylisoxazol-3-yl) acetamide (3j). Eluent used for column
chromatography: Hexane: Ethyl acetate (3:2).Yield 76%, pale yellow
powder, mp 245e246 ꢂC. IR [KBr v cmꢀ1]: 3483 (NeH), 1739 (C]O),
(s 2H, eCH2e). 13C NMR (75 MHz, DMSO-d6,
d): 167.3 (C]O), 165.5
(C]O), 164.7 (C]O), 160.3, 139.1, 134.1, 132.8, 130.2, 129.8, 129.4,
125.8, 123.8, 122.8, 122.2, 120.0, 116.5, 116.3, 115.2, 66.2. Calc. for
C19H13F3N2O4S, %: C, 54.03; H, 3.10; N, 6.63. Found, %: C, 53.83; H,
2.96; N, 6.32.
1689 (C]O), 1587 (C]N), 1143,1087 (CeO). 1H NMR (300 MHz,
d,
ppm, DMSO-d6): 11.4 (s 1H, eCOeNHeCOe), 10.4 (s 1H, eNHe),
7.88 (s 1H, benzylidene proton), 7.52 (d, J ¼ 8.7 Hz, 2H, aromatic
protons), 6.93 (d, J ¼ 8.4 Hz, 2H, aromatic protons), 6.56 (s 1H,
isoxazolyl proton), 4.51 (s 2H, eCH2e), 2.37 (s 3H, eCH3). 13C NMR
4.1.3.6. N-(Benzo[d]thiazol-2-yl)-2-[4-[(2,4-dioxothiazolidin-5-yli-
dene) methyl] phenoxy] acetamide (3f). Eluent used for column