organic compounds
N-(5-Nitro-1,3-thiazol-2-yl)-4-(trifluoromethyl)benzamide
aKey Laboratory of New Animal Drug Project, Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou Institute of Animal Science and Veterinary Pharmaceutics of CAAS, Lanzhou 730050, People's Republic of China
*Correspondence e-mail: lijy1971@163.com
There are two independent and conformationally dissimilar molecules (A and B) in the of the title compound, C11H6F3N3O3S; the dihedral angles between the benzene and thiazole rings are 33.8 (2)° in A and 59.7 (2)° in B. The similarity of the C—N bond lengths in the amide group [1.379 (5) and 1.358 (5) Å for A, and 1.365 (5) and 1.363 (5) Å for B] indicates the presence of conjugation between the two rings. In the crystal, molecules are linked by N—H⋯N hydrogen bonds, forming chains extending along [010]; weak N—H⋯Oamide interactions are also present in the structure.
Related literature
For the antiparasitic activity of nitazoxanide, see: Fox & Saravolatz (2005) and for the antibacterial activity of thiazolides, see: Gargala et al. (2010); Stachulski et al. (2011). For the synthesis and antibacterial activity of the title compound, see: Ballard et al. (2011).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536813011264/zs2257sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813011264/zs2257Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813011264/zs2257Isup3.cml
To a solution of 5-nitrothiazol-2-amine (1 mmol) in distilled pyridine was added a equimolar amount of 4-trifluorobenzoyl chloride with stirring. After the addition was complete, the reaction mixture was allowed to stand overnight. The reaction was judged complete by TLC analysis. The crude product that separated on dilution was filtered, washed with 10% sodium bicarbonate solution, then several times with water. The dry solid was purified by
to give the pure title compound and crystals suitable for single crystal X-ray analysis were obtained by recrystallization from methanol.The positions of all H atoms were determined geometrically and refined using a riding model with C—H = 0.93 Å and N—H = 0.86 Å and with Uiso(H) = 1.2Ueq(C, N).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C11H6F3N3O3S | F(000) = 1280 |
Mr = 317.26 | Dx = 1.668 Mg m−3 |
Monoclinic, P21/c | Melting point = 487–489 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 12.362 (4) Å | Cell parameters from 2723 reflections |
b = 8.946 (3) Å | θ = 2.4–24.6° |
c = 23.261 (8) Å | µ = 0.31 mm−1 |
β = 100.762 (4)° | T = 296 K |
V = 2527.2 (15) Å3 | Block, colourless |
Z = 8 | 0.34 × 0.32 × 0.25 mm |
Bruker APEXII CCD diffractometer | 4588 independent reflections |
Radiation source: fine-focus sealed tube | 3183 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.039 |
ϕ and ω scans | θmax = 25.5°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −14→14 |
Tmin = 0.903, Tmax = 0.927 | k = −9→10 |
11671 measured reflections | l = −28→26 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.069 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.175 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0692P)2 + 3.2322P] where P = (Fo2 + 2Fc2)/3 |
4588 reflections | (Δ/σ)max = 0.001 |
379 parameters | Δρmax = 0.50 e Å−3 |
0 restraints | Δρmin = −0.48 e Å−3 |
C11H6F3N3O3S | V = 2527.2 (15) Å3 |
Mr = 317.26 | Z = 8 |
Monoclinic, P21/c | Mo Kα radiation |
a = 12.362 (4) Å | µ = 0.31 mm−1 |
b = 8.946 (3) Å | T = 296 K |
c = 23.261 (8) Å | 0.34 × 0.32 × 0.25 mm |
β = 100.762 (4)° |
Bruker APEXII CCD diffractometer | 4588 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3183 reflections with I > 2σ(I) |
Tmin = 0.903, Tmax = 0.927 | Rint = 0.039 |
11671 measured reflections |
R[F2 > 2σ(F2)] = 0.069 | 0 restraints |
wR(F2) = 0.175 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.50 e Å−3 |
4588 reflections | Δρmin = −0.48 e Å−3 |
379 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.2871 (3) | 0.2306 (5) | 0.10652 (16) | 0.0387 (10) | |
C2 | 0.2390 (3) | 0.1247 (5) | 0.06679 (17) | 0.0448 (11) | |
H2 | 0.1799 | 0.0687 | 0.0743 | 0.054* | |
C3 | 0.2787 (4) | 0.1018 (5) | 0.01590 (18) | 0.0483 (11) | |
H3 | 0.2467 | 0.0296 | −0.0107 | 0.058* | |
C4 | 0.3654 (3) | 0.1855 (5) | 0.00447 (18) | 0.0471 (11) | |
C5 | 0.4138 (4) | 0.2911 (6) | 0.0439 (2) | 0.0549 (13) | |
H5 | 0.4721 | 0.3481 | 0.0360 | 0.066* | |
C6 | 0.3758 (3) | 0.3125 (5) | 0.09514 (19) | 0.0498 (12) | |
H6 | 0.4098 | 0.3821 | 0.1223 | 0.060* | |
C7 | 0.4053 (5) | 0.1639 (8) | −0.0515 (2) | 0.0687 (16) | |
C8 | 0.2493 (3) | 0.2599 (5) | 0.16232 (17) | 0.0391 (10) | |
C9 | 0.0895 (3) | 0.2764 (5) | 0.20673 (16) | 0.0357 (9) | |
C10 | −0.0463 (4) | 0.3137 (5) | 0.25281 (17) | 0.0459 (11) | |
H10 | −0.1190 | 0.3152 | 0.2583 | 0.055* | |
C11 | 0.0372 (3) | 0.3595 (5) | 0.29379 (16) | 0.0388 (10) | |
C12 | 0.3086 (3) | 0.8380 (5) | 0.34839 (17) | 0.0401 (10) | |
C13 | 0.3064 (4) | 0.7008 (5) | 0.32116 (18) | 0.0461 (11) | |
H13 | 0.2820 | 0.6166 | 0.3384 | 0.055* | |
C14 | 0.3405 (4) | 0.6892 (5) | 0.26822 (19) | 0.0490 (11) | |
H14 | 0.3404 | 0.5965 | 0.2502 | 0.059* | |
C15 | 0.3746 (3) | 0.8129 (5) | 0.24206 (18) | 0.0436 (10) | |
C16 | 0.3762 (4) | 0.9502 (6) | 0.2691 (2) | 0.0554 (12) | |
H16 | 0.3984 | 1.0348 | 0.2512 | 0.066* | |
C17 | 0.3448 (4) | 0.9620 (6) | 0.32261 (19) | 0.0545 (12) | |
H17 | 0.3481 | 1.0541 | 0.3414 | 0.065* | |
C18 | 0.4075 (4) | 0.8034 (7) | 0.1841 (2) | 0.0587 (13) | |
C19 | 0.2738 (3) | 0.8557 (5) | 0.40602 (17) | 0.0426 (10) | |
C20 | 0.1252 (3) | 0.8112 (5) | 0.45709 (16) | 0.0377 (9) | |
C21 | 0.0747 (4) | 0.8551 (5) | 0.54822 (17) | 0.0417 (10) | |
C22 | −0.0063 (4) | 0.7988 (5) | 0.50768 (17) | 0.0454 (11) | |
H22 | −0.0763 | 0.7793 | 0.5151 | 0.054* | |
F1 | 0.4126 (4) | 0.0182 (5) | −0.06394 (15) | 0.1155 (15) | |
F2 | 0.3376 (3) | 0.2148 (5) | −0.09695 (13) | 0.0960 (12) | |
F3 | 0.5002 (3) | 0.2196 (7) | −0.05158 (16) | 0.158 (2) | |
F4 | 0.4257 (4) | 0.6685 (5) | 0.16786 (16) | 0.1311 (18) | |
F5 | 0.3324 (4) | 0.8501 (5) | 0.14227 (14) | 0.1252 (17) | |
F6 | 0.4934 (4) | 0.8772 (8) | 0.18052 (17) | 0.184 (3) | |
N1 | 0.1382 (3) | 0.2403 (4) | 0.16086 (13) | 0.0382 (8) | |
H1 | 0.0982 | 0.2039 | 0.1298 | 0.046* | |
N2 | −0.0176 (3) | 0.2646 (4) | 0.20246 (14) | 0.0445 (9) | |
N3 | 0.0305 (3) | 0.4175 (4) | 0.34971 (15) | 0.0446 (9) | |
N4 | 0.1728 (3) | 0.7979 (4) | 0.40900 (13) | 0.0416 (9) | |
H4 | 0.1375 | 0.7507 | 0.3791 | 0.050* | |
N5 | 0.0219 (3) | 0.7725 (4) | 0.45493 (14) | 0.0437 (9) | |
N6 | 0.0665 (4) | 0.8983 (4) | 0.60621 (15) | 0.0503 (10) | |
O1 | 0.3090 (2) | 0.3016 (4) | 0.20642 (12) | 0.0560 (9) | |
O2 | 0.1160 (3) | 0.4596 (4) | 0.38111 (13) | 0.0638 (9) | |
O3 | −0.0597 (3) | 0.4226 (4) | 0.36369 (13) | 0.0587 (9) | |
O4 | 0.3288 (2) | 0.9184 (4) | 0.44772 (13) | 0.0632 (10) | |
O5 | 0.1513 (3) | 0.9334 (4) | 0.63961 (14) | 0.0713 (11) | |
O6 | −0.0250 (3) | 0.8991 (4) | 0.61955 (13) | 0.0647 (10) | |
S1 | 0.16224 (9) | 0.34362 (13) | 0.27209 (4) | 0.0429 (3) | |
S2 | 0.19504 (9) | 0.88052 (14) | 0.52279 (4) | 0.0469 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.037 (2) | 0.045 (3) | 0.035 (2) | 0.0080 (19) | 0.0076 (17) | 0.0032 (19) |
C2 | 0.046 (3) | 0.046 (3) | 0.045 (2) | −0.001 (2) | 0.014 (2) | −0.002 (2) |
C3 | 0.051 (3) | 0.051 (3) | 0.044 (2) | 0.002 (2) | 0.012 (2) | −0.006 (2) |
C4 | 0.041 (2) | 0.062 (3) | 0.039 (2) | 0.012 (2) | 0.0087 (19) | 0.004 (2) |
C5 | 0.041 (3) | 0.072 (4) | 0.056 (3) | −0.003 (2) | 0.020 (2) | 0.000 (3) |
C6 | 0.041 (2) | 0.061 (3) | 0.048 (3) | −0.008 (2) | 0.010 (2) | −0.011 (2) |
C7 | 0.063 (3) | 0.103 (5) | 0.046 (3) | 0.000 (3) | 0.024 (3) | −0.009 (3) |
C8 | 0.041 (2) | 0.041 (3) | 0.036 (2) | 0.0028 (19) | 0.0087 (18) | 0.0055 (19) |
C9 | 0.043 (2) | 0.034 (2) | 0.0299 (19) | −0.0021 (18) | 0.0073 (17) | 0.0037 (17) |
C10 | 0.044 (2) | 0.058 (3) | 0.037 (2) | 0.001 (2) | 0.0133 (19) | 0.001 (2) |
C11 | 0.048 (2) | 0.040 (3) | 0.030 (2) | 0.0028 (19) | 0.0099 (18) | 0.0008 (17) |
C12 | 0.030 (2) | 0.049 (3) | 0.041 (2) | −0.0009 (19) | 0.0060 (17) | −0.004 (2) |
C13 | 0.051 (3) | 0.044 (3) | 0.045 (2) | 0.000 (2) | 0.016 (2) | 0.002 (2) |
C14 | 0.051 (3) | 0.048 (3) | 0.050 (3) | 0.004 (2) | 0.016 (2) | −0.006 (2) |
C15 | 0.038 (2) | 0.053 (3) | 0.040 (2) | 0.004 (2) | 0.0078 (18) | 0.003 (2) |
C16 | 0.064 (3) | 0.049 (3) | 0.056 (3) | −0.007 (2) | 0.018 (2) | 0.005 (2) |
C17 | 0.068 (3) | 0.047 (3) | 0.053 (3) | −0.005 (2) | 0.023 (2) | −0.008 (2) |
C18 | 0.059 (3) | 0.074 (4) | 0.045 (3) | 0.003 (3) | 0.016 (2) | 0.005 (3) |
C19 | 0.039 (2) | 0.050 (3) | 0.037 (2) | 0.002 (2) | 0.0039 (18) | −0.003 (2) |
C20 | 0.039 (2) | 0.042 (3) | 0.031 (2) | 0.0013 (19) | 0.0056 (17) | −0.0026 (18) |
C21 | 0.056 (3) | 0.037 (3) | 0.033 (2) | 0.001 (2) | 0.0115 (19) | 0.0004 (18) |
C22 | 0.050 (3) | 0.051 (3) | 0.039 (2) | 0.000 (2) | 0.0152 (19) | 0.003 (2) |
F1 | 0.169 (4) | 0.117 (3) | 0.075 (2) | 0.048 (3) | 0.059 (2) | −0.008 (2) |
F2 | 0.112 (3) | 0.133 (3) | 0.0448 (17) | 0.011 (2) | 0.0194 (17) | 0.0211 (19) |
F3 | 0.090 (3) | 0.313 (7) | 0.089 (3) | −0.080 (4) | 0.064 (2) | −0.076 (3) |
F4 | 0.226 (5) | 0.101 (3) | 0.092 (3) | 0.061 (3) | 0.098 (3) | 0.013 (2) |
F5 | 0.147 (4) | 0.181 (4) | 0.0498 (19) | 0.073 (3) | 0.024 (2) | 0.027 (2) |
F6 | 0.158 (4) | 0.329 (8) | 0.090 (3) | −0.157 (5) | 0.085 (3) | −0.081 (4) |
N1 | 0.0384 (19) | 0.046 (2) | 0.0310 (17) | −0.0039 (16) | 0.0083 (14) | −0.0060 (15) |
N2 | 0.038 (2) | 0.062 (3) | 0.0349 (18) | −0.0076 (18) | 0.0106 (15) | −0.0049 (17) |
N3 | 0.065 (3) | 0.036 (2) | 0.0355 (19) | 0.0040 (18) | 0.0157 (19) | 0.0006 (16) |
N4 | 0.0377 (19) | 0.055 (2) | 0.0325 (17) | −0.0058 (16) | 0.0077 (14) | −0.0091 (16) |
N5 | 0.044 (2) | 0.053 (2) | 0.0353 (18) | −0.0043 (18) | 0.0119 (15) | −0.0030 (16) |
N6 | 0.081 (3) | 0.034 (2) | 0.037 (2) | 0.002 (2) | 0.014 (2) | −0.0004 (17) |
O1 | 0.0428 (17) | 0.088 (3) | 0.0343 (16) | 0.0002 (17) | 0.0013 (13) | −0.0087 (16) |
O2 | 0.078 (2) | 0.073 (3) | 0.0379 (17) | −0.006 (2) | 0.0045 (17) | −0.0150 (17) |
O3 | 0.073 (2) | 0.056 (2) | 0.0556 (19) | 0.0123 (17) | 0.0336 (17) | −0.0024 (16) |
O4 | 0.0457 (18) | 0.097 (3) | 0.0468 (18) | −0.0171 (18) | 0.0080 (15) | −0.0243 (18) |
O5 | 0.101 (3) | 0.070 (3) | 0.0410 (18) | −0.009 (2) | 0.0067 (19) | −0.0184 (17) |
O6 | 0.092 (3) | 0.058 (2) | 0.054 (2) | 0.0106 (19) | 0.0380 (19) | 0.0038 (16) |
S1 | 0.0430 (6) | 0.0545 (8) | 0.0309 (5) | −0.0044 (5) | 0.0063 (4) | −0.0053 (5) |
S2 | 0.0490 (7) | 0.0570 (8) | 0.0335 (5) | −0.0026 (6) | 0.0046 (5) | −0.0070 (5) |
C1—C2 | 1.379 (6) | C13—C14 | 1.378 (6) |
C1—C6 | 1.385 (6) | C13—H13 | 0.9300 |
C1—C8 | 1.483 (5) | C14—C15 | 1.367 (6) |
C2—C3 | 1.378 (6) | C14—H14 | 0.9300 |
C2—H2 | 0.9300 | C15—C16 | 1.379 (6) |
C3—C4 | 1.374 (6) | C15—C18 | 1.482 (6) |
C3—H3 | 0.9300 | C16—C17 | 1.374 (6) |
C4—C5 | 1.375 (6) | C16—H16 | 0.9300 |
C4—C7 | 1.488 (6) | C17—H17 | 0.9300 |
C5—C6 | 1.372 (6) | C18—F6 | 1.266 (6) |
C5—H5 | 0.9300 | C18—F5 | 1.283 (6) |
C6—H6 | 0.9300 | C18—F4 | 1.297 (6) |
C7—F3 | 1.275 (6) | C19—O4 | 1.213 (5) |
C7—F2 | 1.303 (6) | C19—N4 | 1.365 (5) |
C7—F1 | 1.342 (7) | C20—N5 | 1.314 (5) |
C8—O1 | 1.205 (5) | C20—N4 | 1.363 (5) |
C8—N1 | 1.379 (5) | C20—S2 | 1.724 (4) |
C9—N2 | 1.314 (5) | C21—C22 | 1.339 (6) |
C9—N1 | 1.358 (5) | C21—N6 | 1.425 (5) |
C9—S1 | 1.723 (4) | C21—S2 | 1.716 (4) |
C10—C11 | 1.333 (6) | C22—N5 | 1.358 (5) |
C10—N2 | 1.359 (5) | C22—H22 | 0.9300 |
C10—H10 | 0.9300 | N1—H1 | 0.8600 |
C11—N3 | 1.417 (5) | N3—O3 | 1.220 (4) |
C11—S1 | 1.719 (4) | N3—O2 | 1.227 (5) |
C12—C17 | 1.375 (6) | N4—H4 | 0.8600 |
C12—C13 | 1.379 (6) | N6—O5 | 1.224 (5) |
C12—C19 | 1.491 (5) | N6—O6 | 1.227 (5) |
C2—C1—C6 | 119.5 (4) | C13—C14—H14 | 119.7 |
C2—C1—C8 | 122.8 (4) | C14—C15—C16 | 119.8 (4) |
C6—C1—C8 | 117.7 (4) | C14—C15—C18 | 121.3 (4) |
C3—C2—C1 | 120.0 (4) | C16—C15—C18 | 118.9 (4) |
C3—C2—H2 | 120.0 | C17—C16—C15 | 120.0 (4) |
C1—C2—H2 | 120.0 | C17—C16—H16 | 120.0 |
C2—C3—C4 | 120.1 (4) | C15—C16—H16 | 120.0 |
C2—C3—H3 | 120.0 | C16—C17—C12 | 120.2 (4) |
C4—C3—H3 | 120.0 | C16—C17—H17 | 119.9 |
C5—C4—C3 | 120.2 (4) | C12—C17—H17 | 119.9 |
C5—C4—C7 | 120.0 (4) | F6—C18—F5 | 106.1 (5) |
C3—C4—C7 | 119.8 (4) | F6—C18—F4 | 105.9 (5) |
C6—C5—C4 | 119.9 (4) | F5—C18—F4 | 102.8 (5) |
C6—C5—H5 | 120.0 | F6—C18—C15 | 114.0 (4) |
C4—C5—H5 | 120.0 | F5—C18—C15 | 112.9 (4) |
C5—C6—C1 | 120.2 (4) | F4—C18—C15 | 114.2 (4) |
C5—C6—H6 | 119.9 | O4—C19—N4 | 121.1 (4) |
C1—C6—H6 | 119.9 | O4—C19—C12 | 123.8 (4) |
F3—C7—F2 | 108.3 (5) | N4—C19—C12 | 115.2 (3) |
F3—C7—F1 | 106.3 (5) | N5—C20—N4 | 120.7 (3) |
F2—C7—F1 | 102.9 (5) | N5—C20—S2 | 116.8 (3) |
F3—C7—C4 | 114.0 (5) | N4—C20—S2 | 122.5 (3) |
F2—C7—C4 | 113.4 (4) | C22—C21—N6 | 126.4 (4) |
F1—C7—C4 | 111.2 (5) | C22—C21—S2 | 112.9 (3) |
O1—C8—N1 | 120.6 (4) | N6—C21—S2 | 120.6 (3) |
O1—C8—C1 | 123.9 (4) | C21—C22—N5 | 114.7 (4) |
N1—C8—C1 | 115.6 (3) | C21—C22—H22 | 122.7 |
N2—C9—N1 | 120.6 (3) | N5—C22—H22 | 122.7 |
N2—C9—S1 | 116.6 (3) | C9—N1—C8 | 122.4 (3) |
N1—C9—S1 | 122.8 (3) | C9—N1—H1 | 118.8 |
C11—C10—N2 | 115.0 (4) | C8—N1—H1 | 118.8 |
C11—C10—H10 | 122.5 | C9—N2—C10 | 109.3 (3) |
N2—C10—H10 | 122.5 | O3—N3—O2 | 124.0 (4) |
C10—C11—N3 | 126.8 (4) | O3—N3—C11 | 118.1 (4) |
C10—C11—S1 | 112.6 (3) | O2—N3—C11 | 117.9 (4) |
N3—C11—S1 | 120.6 (3) | C19—N4—C20 | 123.2 (3) |
C17—C12—C13 | 119.9 (4) | C19—N4—H4 | 118.4 |
C17—C12—C19 | 118.6 (4) | C20—N4—H4 | 118.4 |
C13—C12—C19 | 121.6 (4) | C20—N5—C22 | 109.4 (3) |
C14—C13—C12 | 119.6 (4) | O5—N6—O6 | 124.0 (4) |
C14—C13—H13 | 120.2 | O5—N6—C21 | 117.8 (4) |
C12—C13—H13 | 120.2 | O6—N6—C21 | 118.2 (4) |
C15—C14—C13 | 120.6 (4) | C11—S1—C9 | 86.47 (19) |
C15—C14—H14 | 119.7 | C21—S2—C20 | 86.26 (19) |
C6—C1—C2—C3 | −0.6 (6) | C16—C15—C18—F4 | 166.3 (5) |
C8—C1—C2—C3 | −179.4 (4) | C17—C12—C19—O4 | −50.0 (6) |
C1—C2—C3—C4 | −0.6 (7) | C13—C12—C19—O4 | 129.2 (5) |
C2—C3—C4—C5 | 0.7 (7) | C17—C12—C19—N4 | 129.0 (4) |
C2—C3—C4—C7 | −177.9 (4) | C13—C12—C19—N4 | −51.8 (6) |
C3—C4—C5—C6 | 0.4 (7) | N6—C21—C22—N5 | 177.4 (4) |
C7—C4—C5—C6 | 179.1 (5) | S2—C21—C22—N5 | 0.2 (5) |
C4—C5—C6—C1 | −1.7 (7) | N2—C9—N1—C8 | 175.9 (4) |
C2—C1—C6—C5 | 1.8 (7) | S1—C9—N1—C8 | −2.5 (6) |
C8—C1—C6—C5 | −179.4 (4) | O1—C8—N1—C9 | 4.8 (6) |
C5—C4—C7—F3 | 17.1 (8) | C1—C8—N1—C9 | −173.6 (4) |
C3—C4—C7—F3 | −164.2 (5) | N1—C9—N2—C10 | −177.1 (4) |
C5—C4—C7—F2 | −107.4 (6) | S1—C9—N2—C10 | 1.3 (5) |
C3—C4—C7—F2 | 71.3 (7) | C11—C10—N2—C9 | −0.6 (6) |
C5—C4—C7—F1 | 137.3 (5) | C10—C11—N3—O3 | 2.6 (7) |
C3—C4—C7—F1 | −44.1 (7) | S1—C11—N3—O3 | −178.0 (3) |
C2—C1—C8—O1 | 149.3 (4) | C10—C11—N3—O2 | −177.3 (4) |
C6—C1—C8—O1 | −29.5 (6) | S1—C11—N3—O2 | 2.1 (5) |
C2—C1—C8—N1 | −32.4 (6) | O4—C19—N4—C20 | 2.8 (7) |
C6—C1—C8—N1 | 148.8 (4) | C12—C19—N4—C20 | −176.2 (4) |
N2—C10—C11—N3 | 179.1 (4) | N5—C20—N4—C19 | 170.2 (4) |
N2—C10—C11—S1 | −0.3 (5) | S2—C20—N4—C19 | −9.0 (6) |
C17—C12—C13—C14 | 0.0 (7) | N4—C20—N5—C22 | −178.9 (4) |
C19—C12—C13—C14 | −179.2 (4) | S2—C20—N5—C22 | 0.4 (5) |
C12—C13—C14—C15 | −1.2 (7) | C21—C22—N5—C20 | −0.3 (6) |
C13—C14—C15—C16 | 0.8 (7) | C22—C21—N6—O5 | 172.6 (4) |
C13—C14—C15—C18 | −177.6 (4) | S2—C21—N6—O5 | −10.3 (6) |
C14—C15—C16—C17 | 0.8 (7) | C22—C21—N6—O6 | −7.9 (7) |
C18—C15—C16—C17 | 179.2 (4) | S2—C21—N6—O6 | 169.2 (3) |
C15—C16—C17—C12 | −2.0 (7) | C10—C11—S1—C9 | 0.8 (4) |
C13—C12—C17—C16 | 1.6 (7) | N3—C11—S1—C9 | −178.7 (4) |
C19—C12—C17—C16 | −179.2 (4) | N2—C9—S1—C11 | −1.2 (3) |
C14—C15—C18—F6 | −137.1 (6) | N1—C9—S1—C11 | 177.2 (4) |
C16—C15—C18—F6 | 44.5 (7) | C22—C21—S2—C20 | 0.0 (4) |
C14—C15—C18—F5 | 101.7 (6) | N6—C21—S2—C20 | −177.4 (4) |
C16—C15—C18—F5 | −76.7 (6) | N5—C20—S2—C21 | −0.3 (4) |
C14—C15—C18—F4 | −15.3 (7) | N4—C20—S2—C21 | 179.0 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N5i | 0.86 | 2.32 | 3.044 (5) | 142 |
N1—H1···O3i | 0.86 | 2.57 | 3.023 (5) | 115 |
N4—H4···N2ii | 0.86 | 2.18 | 2.939 (5) | 147 |
N4—H4···O2 | 0.86 | 2.62 | 3.146 (5) | 121 |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) −x, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C11H6F3N3O3S |
Mr | 317.26 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 296 |
a, b, c (Å) | 12.362 (4), 8.946 (3), 23.261 (8) |
β (°) | 100.762 (4) |
V (Å3) | 2527.2 (15) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.31 |
Crystal size (mm) | 0.34 × 0.32 × 0.25 |
Data collection | |
Diffractometer | Bruker APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.903, 0.927 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 11671, 4588, 3183 |
Rint | 0.039 |
(sin θ/λ)max (Å−1) | 0.606 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.069, 0.175, 1.06 |
No. of reflections | 4588 |
No. of parameters | 379 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.50, −0.48 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···N5i | 0.86 | 2.32 | 3.044 (5) | 142 |
N1—H1···O3i | 0.86 | 2.57 | 3.023 (5) | 115 |
N4—H4···N2ii | 0.86 | 2.18 | 2.939 (5) | 147 |
N4—H4···O2 | 0.86 | 2.62 | 3.146 (5) | 121 |
Symmetry codes: (i) −x, y−1/2, −z+1/2; (ii) −x, y+1/2, −z+1/2. |
Acknowledgements
This study was supported by the earmarked fund for China Agriculture Research System (cars-38) and the program funded by the Basic Scientific Research Funds in Central Agricultural Scientific Research Institutions (1610322013005).
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Parasitic and bacterial infections represnt a significant cause of morbidity and mortality worldwide (Fox & Saravolatz, 2005). Nitazoxanide is a novel antiparasitic compound developed for both human and animal use and is the parent compound of a class of drugs named thiazolides. Recently, a number of thiazolides were synthesized and their biological activities were also evaluated (Gargala et al., 2010); Stachulski et al., 2011). The title compound C11H6F3N3O3S is a new thiazolide which displays higher antibacterial activity than nitazoxanide (Ballard et al., 2011) and the crystal structure is reported herein.
In this structure, there are two independent and conformationally dissimilar molecules in the asymmetric unit (Fig. 1) [dihedral angles between the benzene and thiazole rings: 33.8 (2) and 59.7 (2)°]. In the crystal, the molecules are linked by intermolecular N—H···N hydrogen bonds (Table 2), giving one-dimensional chains extending along [010]. Also present in the structure are intra- and intermolecular N—H···Oamide interactions within the chains.
The similarity of the C—N bond lengths [N1—C8, 1.379 (5) Å and N1—C9, 1.358 (5) Å] in the amide group indicates the presence of conjugation between the two rings, which confirms the hypothetical mechanism with thiazolides that the amin anion may interact with the target PFOR enzyme.