organic compounds
H-pyrazole
of 1-(2,4-dinitrophenyl)-3,5-diphenyl-1aChemistry and Environmental Division, Manchester Metropolitan University, Manchester M1 5GD, England, bChemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt, cDepartment of Chemistry, Tulane University, New Orleans, LA 70118, USA, dDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, eKirkuk University, College of Science, Department of Chemistry, Kirkuk, Iraq, and fNational Organization for Drug Control and Research, Giza, Egypt
*Correspondence e-mail: shaabankamel@yahoo.com
In the title molecule, C21H14N4O4, the phenyl rings make dihedral angles of 39.61 (8) and 9.4 (1)°, respectively, with the central pyrazole ring. The dihedral angle between the pyrazole and dinitrophenyl rings is 46.95 (5)°. In the crystal, molecules pack in helical stacks parallel to the a axis aided by weak C—H⋯O interactions.
Keywords: crystal structure; pyrazoles; bio-active motifs.
CCDC reference: 1436135
1. Related literature
For the synthesis and pharmaceutical activities of pyrazole-containing compounds, see: Szabó et al. (2008); Tanitame et al. (2005); Cottineau et al. (2002); Mokhtar & El-Khawass (1988); Rida et al. (2009); Abadi et al. (2003); Sharma et al. (2014); Mykhailiuk (2015).
2. Experimental
2.1. Crystal data
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Data collection: APEX2 (Bruker, 2015); cell SAINT (Bruker, 2015); data reduction: SAINT; program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).
Supporting information
CCDC reference: 1436135
https://doi.org/10.1107/S2056989015021350/qm2114sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015021350/qm2114Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989015021350/qm2114Isup3.cml
An equimolar mixture of 1,3-diphenylpropane-1,3-dione (1 mmol, 224 mg) and (3,5-dinitrophenyl)hydrazine (1 mmol, 198 mg) was refluxed in 20 ml e thanol for 6–7 h. The mixture was cooled and the excess solvent was removed. The precipitate was collected and recrystallized from ethanol (m.p 421–423 K).
H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 Å). All were included as riding contributions with isotropic displacement parameters 1.2 times those of the attached atoms. The
could not be determined.The heterocyclic pyrazole scaffold compounds demonstrate a remarkable wide range of pharmacological activities such as anti-inflammatory (Szabó et al., 2008), anti-bacterial, antifungal (Tanitame et al., 2005), hypoglycemic (Cottineau et al., 2002; Mokhtar & El-Khawass, 1988), inhibition of cyclooxigenase-2 (Rida et al., 2009) and anti-angiogenic (Abadi et al., 2003). Different pyrazole derivatives have also shown anti-proliferative and antitumor activities (Sharma et al., 2014). More recently, the pyrazole ring system represents an advantageous choice for the synthesis of pharmaceutical compounds with different activities and good safety profiles (Mykhailiuk, 2015). In this context and following our on-going study of the synthesis of bio-active heterocyclic molecules we report in this study the synthesis and
of the title compound.In the title compound (Fig. 1), the phenyl rings C4—C9 and C10—C15 make dihedral angles of 39.61 (8) and 9.4 (1)°, respectively, with the central pyrazole ring. The dihedral angle between the pyrazole and dinitrophenyl rings is 46.95 (5)°. The molecules form helical stacks running parallel to the a axis assisted by weak, intermolecular C21—H21···O1i (i: x + 1/2, -y + 1/2, -z + 1) interactions (Figs. 2 and 3 and Table 1).
For the synthesis and pharmaceutical activities of pyrazole-containing compounds, see: Szabó et al. (2008); Tanitame et al. (2005); Cottineau et al. (2002); Mokhtar & El-Khawass (1988); Rida et al. (2009); Abadi et al. (2003); Sharma et al. (2014); Mykhailiuk (2015).
Data collection: APEX2 (Bruker, 2015); cell
SAINT (Bruker, 2015); data reduction: SAINT (Bruker, 2015); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 2012); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C21H14N4O4 | Dx = 1.423 Mg m−3 |
Mr = 386.36 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, P212121 | Cell parameters from 4944 reflections |
a = 7.2170 (5) Å | θ = 2.6–24.1° |
b = 12.9467 (10) Å | µ = 0.10 mm−1 |
c = 19.3006 (14) Å | T = 150 K |
V = 1803.4 (2) Å3 | Block, yellow-orange |
Z = 4 | 0.18 × 0.18 × 0.17 mm |
F(000) = 800 |
Bruker SMART APEX CCD diffractometer | 4635 independent reflections |
Radiation source: fine-focus sealed tube | 3401 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.045 |
Detector resolution: 8.3333 pixels mm-1 | θmax = 29.1°, θmin = 1.9° |
φ and ω scans | h = −9→9 |
Absorption correction: multi-scan (SADABS; Bruker, 2015) | k = −17→16 |
Tmin = 0.78, Tmax = 0.98 | l = −26→26 |
17283 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.042 | H-atom parameters constrained |
wR(F2) = 0.096 | w = 1/[σ2(Fo2) + (0.0375P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.03 | (Δ/σ)max < 0.001 |
4635 reflections | Δρmax = 0.21 e Å−3 |
262 parameters | Δρmin = −0.17 e Å−3 |
0 restraints | Absolute structure: Flack x determined using 1193 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons et al., 2013) |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.3 (8) |
C21H14N4O4 | V = 1803.4 (2) Å3 |
Mr = 386.36 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 7.2170 (5) Å | µ = 0.10 mm−1 |
b = 12.9467 (10) Å | T = 150 K |
c = 19.3006 (14) Å | 0.18 × 0.18 × 0.17 mm |
Bruker SMART APEX CCD diffractometer | 4635 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2015) | 3401 reflections with I > 2σ(I) |
Tmin = 0.78, Tmax = 0.98 | Rint = 0.045 |
17283 measured reflections |
R[F2 > 2σ(F2)] = 0.042 | H-atom parameters constrained |
wR(F2) = 0.096 | Δρmax = 0.21 e Å−3 |
S = 1.03 | Δρmin = −0.17 e Å−3 |
4635 reflections | Absolute structure: Flack x determined using 1193 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons et al., 2013) |
262 parameters | Absolute structure parameter: −0.3 (8) |
0 restraints |
Experimental. The diffraction data were collected in three sets of 363 frames (0.5° width in ω) at φ = 0, 120 and 240°. A scan time of 40 sec/frame was used. |
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. H-atoms attached to carbon were placed in calculated positions (C—H = 0.95 Å). All were included as riding contributions with isotropic displacement parameters 1.2 times those of the attached atoms. |
x | y | z | Uiso*/Ueq | ||
O1 | 0.0335 (2) | 0.48865 (13) | 0.50537 (9) | 0.0369 (4) | |
O2 | 0.1081 (3) | 0.56459 (13) | 0.40944 (10) | 0.0466 (5) | |
O3 | 0.1707 (3) | 0.33782 (17) | 0.21292 (9) | 0.0617 (6) | |
O4 | 0.2274 (3) | 0.17545 (18) | 0.22859 (9) | 0.0625 (6) | |
N1 | 0.2445 (3) | 0.26495 (13) | 0.58248 (9) | 0.0280 (4) | |
N2 | 0.3024 (2) | 0.33719 (12) | 0.53522 (9) | 0.0261 (4) | |
N3 | 0.1040 (2) | 0.48950 (14) | 0.44764 (10) | 0.0319 (4) | |
N4 | 0.2043 (3) | 0.2633 (2) | 0.24971 (11) | 0.0464 (6) | |
C1 | 0.3782 (3) | 0.42265 (15) | 0.56610 (11) | 0.0268 (5) | |
C2 | 0.3640 (3) | 0.40575 (17) | 0.63603 (11) | 0.0284 (5) | |
H2 | 0.4021 | 0.4511 | 0.6720 | 0.034* | |
C3 | 0.2814 (3) | 0.30750 (17) | 0.64398 (11) | 0.0279 (5) | |
C4 | 0.4636 (3) | 0.50690 (16) | 0.52632 (11) | 0.0260 (5) | |
C5 | 0.5697 (3) | 0.48621 (18) | 0.46740 (12) | 0.0305 (5) | |
H5 | 0.5917 | 0.4167 | 0.4539 | 0.037* | |
C6 | 0.6430 (3) | 0.56641 (17) | 0.42857 (12) | 0.0334 (5) | |
H6 | 0.7123 | 0.5519 | 0.3879 | 0.040* | |
C7 | 0.6152 (3) | 0.66760 (18) | 0.44903 (13) | 0.0377 (6) | |
H7 | 0.6639 | 0.7226 | 0.4220 | 0.045* | |
C8 | 0.5167 (4) | 0.68884 (19) | 0.50876 (13) | 0.0379 (6) | |
H8 | 0.5010 | 0.7583 | 0.5235 | 0.045* | |
C9 | 0.4406 (3) | 0.60891 (17) | 0.54720 (12) | 0.0338 (5) | |
H9 | 0.3723 | 0.6239 | 0.5881 | 0.041* | |
C10 | 0.2384 (3) | 0.24957 (17) | 0.70755 (11) | 0.0297 (5) | |
C11 | 0.2507 (3) | 0.29519 (19) | 0.77262 (12) | 0.0377 (6) | |
H11 | 0.2866 | 0.3656 | 0.7764 | 0.045* | |
C12 | 0.2113 (4) | 0.2394 (2) | 0.83180 (13) | 0.0456 (7) | |
H12 | 0.2220 | 0.2715 | 0.8759 | 0.055* | |
C13 | 0.1569 (4) | 0.1382 (2) | 0.82749 (13) | 0.0459 (7) | |
H13 | 0.1295 | 0.1004 | 0.8684 | 0.055* | |
C14 | 0.1421 (4) | 0.0917 (2) | 0.76378 (14) | 0.0491 (7) | |
H14 | 0.1038 | 0.0217 | 0.7605 | 0.059* | |
C15 | 0.1830 (4) | 0.14687 (18) | 0.70429 (13) | 0.0413 (6) | |
H15 | 0.1731 | 0.1139 | 0.6605 | 0.050* | |
C16 | 0.2618 (3) | 0.31836 (16) | 0.46461 (10) | 0.0254 (4) | |
C17 | 0.1820 (3) | 0.39223 (16) | 0.42117 (11) | 0.0277 (5) | |
C18 | 0.1647 (3) | 0.37515 (18) | 0.35076 (12) | 0.0329 (5) | |
H18 | 0.1168 | 0.4271 | 0.3210 | 0.040* | |
C19 | 0.2188 (3) | 0.28098 (18) | 0.32499 (11) | 0.0328 (5) | |
C20 | 0.2869 (3) | 0.20328 (18) | 0.36702 (12) | 0.0332 (5) | |
H20 | 0.3171 | 0.1376 | 0.3482 | 0.040* | |
C21 | 0.3104 (3) | 0.22280 (16) | 0.43688 (11) | 0.0293 (5) | |
H21 | 0.3600 | 0.1707 | 0.4662 | 0.035* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0335 (9) | 0.0348 (10) | 0.0423 (10) | 0.0026 (7) | 0.0025 (8) | 0.0002 (8) |
O2 | 0.0523 (11) | 0.0286 (9) | 0.0588 (11) | 0.0032 (8) | −0.0003 (10) | 0.0159 (9) |
O3 | 0.0703 (13) | 0.0840 (15) | 0.0308 (10) | −0.0060 (12) | −0.0092 (9) | 0.0152 (10) |
O4 | 0.0708 (14) | 0.0772 (15) | 0.0394 (11) | 0.0100 (12) | −0.0055 (10) | −0.0219 (10) |
N1 | 0.0297 (10) | 0.0279 (10) | 0.0264 (9) | −0.0008 (8) | −0.0002 (8) | 0.0051 (8) |
N2 | 0.0293 (9) | 0.0228 (9) | 0.0261 (9) | −0.0012 (8) | −0.0007 (7) | 0.0017 (7) |
N3 | 0.0264 (9) | 0.0276 (10) | 0.0418 (12) | −0.0005 (8) | −0.0052 (9) | 0.0052 (9) |
N4 | 0.0402 (12) | 0.0702 (17) | 0.0289 (12) | −0.0053 (12) | −0.0022 (9) | −0.0018 (12) |
C1 | 0.0261 (11) | 0.0231 (11) | 0.0313 (12) | 0.0014 (9) | −0.0008 (9) | −0.0022 (9) |
C2 | 0.0300 (11) | 0.0255 (11) | 0.0297 (11) | −0.0004 (9) | −0.0019 (10) | −0.0021 (9) |
C3 | 0.0276 (11) | 0.0303 (12) | 0.0256 (11) | 0.0037 (9) | −0.0006 (9) | −0.0009 (9) |
C4 | 0.0235 (11) | 0.0260 (12) | 0.0286 (11) | −0.0011 (9) | −0.0032 (9) | −0.0004 (9) |
C5 | 0.0279 (12) | 0.0264 (12) | 0.0372 (13) | 0.0003 (9) | −0.0004 (10) | −0.0019 (10) |
C6 | 0.0280 (12) | 0.0363 (13) | 0.0360 (13) | −0.0027 (10) | 0.0023 (10) | 0.0017 (11) |
C7 | 0.0347 (12) | 0.0318 (13) | 0.0467 (14) | −0.0085 (10) | −0.0016 (12) | 0.0058 (11) |
C8 | 0.0421 (14) | 0.0253 (13) | 0.0462 (15) | −0.0045 (11) | −0.0027 (11) | −0.0031 (11) |
C9 | 0.0396 (13) | 0.0282 (12) | 0.0335 (12) | −0.0011 (10) | 0.0005 (11) | −0.0059 (11) |
C10 | 0.0274 (11) | 0.0340 (13) | 0.0278 (11) | 0.0006 (10) | −0.0014 (10) | 0.0005 (10) |
C11 | 0.0420 (14) | 0.0382 (14) | 0.0329 (13) | −0.0083 (11) | 0.0034 (11) | −0.0026 (10) |
C12 | 0.0544 (17) | 0.0531 (16) | 0.0293 (13) | −0.0042 (14) | 0.0032 (12) | −0.0003 (12) |
C13 | 0.0553 (17) | 0.0519 (17) | 0.0304 (14) | −0.0078 (14) | 0.0004 (12) | 0.0116 (12) |
C14 | 0.0721 (19) | 0.0360 (15) | 0.0394 (14) | −0.0103 (14) | −0.0031 (14) | 0.0091 (12) |
C15 | 0.0616 (16) | 0.0329 (13) | 0.0293 (12) | −0.0054 (12) | −0.0031 (12) | 0.0015 (10) |
C16 | 0.0234 (10) | 0.0264 (11) | 0.0265 (11) | −0.0034 (9) | −0.0013 (9) | 0.0024 (9) |
C17 | 0.0257 (11) | 0.0255 (11) | 0.0320 (12) | −0.0043 (9) | −0.0007 (9) | 0.0029 (10) |
C18 | 0.0300 (12) | 0.0364 (13) | 0.0324 (12) | −0.0055 (10) | −0.0040 (10) | 0.0092 (10) |
C19 | 0.0315 (12) | 0.0430 (14) | 0.0240 (11) | −0.0077 (11) | −0.0020 (10) | 0.0011 (10) |
C20 | 0.0321 (12) | 0.0335 (13) | 0.0340 (13) | −0.0033 (10) | 0.0014 (10) | −0.0056 (10) |
C21 | 0.0294 (12) | 0.0288 (12) | 0.0296 (12) | −0.0015 (9) | −0.0025 (9) | 0.0022 (9) |
O1—N3 | 1.225 (2) | C8—C9 | 1.387 (3) |
O2—N3 | 1.220 (2) | C8—H8 | 0.9500 |
O3—N4 | 1.222 (3) | C9—H9 | 0.9500 |
O4—N4 | 1.220 (3) | C10—C15 | 1.390 (3) |
N1—C3 | 1.335 (3) | C10—C11 | 1.391 (3) |
N1—N2 | 1.372 (2) | C11—C12 | 1.381 (3) |
N2—C1 | 1.371 (3) | C11—H11 | 0.9500 |
N2—C16 | 1.415 (3) | C12—C13 | 1.371 (4) |
N3—C17 | 1.471 (3) | C12—H12 | 0.9500 |
N4—C19 | 1.475 (3) | C13—C14 | 1.373 (4) |
C1—C2 | 1.371 (3) | C13—H13 | 0.9500 |
C1—C4 | 1.469 (3) | C14—C15 | 1.384 (3) |
C2—C3 | 1.413 (3) | C14—H14 | 0.9500 |
C2—H2 | 0.9500 | C15—H15 | 0.9500 |
C3—C10 | 1.471 (3) | C16—C21 | 1.393 (3) |
C4—C9 | 1.391 (3) | C16—C17 | 1.396 (3) |
C4—C5 | 1.397 (3) | C17—C18 | 1.382 (3) |
C5—C6 | 1.385 (3) | C18—C19 | 1.373 (3) |
C5—H5 | 0.9500 | C18—H18 | 0.9500 |
C6—C7 | 1.383 (3) | C19—C20 | 1.383 (3) |
C6—H6 | 0.9500 | C20—C21 | 1.382 (3) |
C7—C8 | 1.382 (3) | C20—H20 | 0.9500 |
C7—H7 | 0.9500 | C21—H21 | 0.9500 |
C3—N1—N2 | 104.42 (17) | C15—C10—C11 | 117.7 (2) |
C1—N2—N1 | 112.51 (17) | C15—C10—C3 | 120.71 (19) |
C1—N2—C16 | 129.82 (17) | C11—C10—C3 | 121.5 (2) |
N1—N2—C16 | 117.39 (16) | C12—C11—C10 | 120.8 (2) |
O2—N3—O1 | 124.5 (2) | C12—C11—H11 | 119.6 |
O2—N3—C17 | 117.58 (19) | C10—C11—H11 | 119.6 |
O1—N3—C17 | 117.85 (17) | C13—C12—C11 | 120.6 (2) |
O4—N4—O3 | 124.7 (2) | C13—C12—H12 | 119.7 |
O4—N4—C19 | 117.7 (2) | C11—C12—H12 | 119.7 |
O3—N4—C19 | 117.6 (2) | C12—C13—C14 | 119.7 (2) |
N2—C1—C2 | 105.63 (19) | C12—C13—H13 | 120.1 |
N2—C1—C4 | 122.64 (19) | C14—C13—H13 | 120.1 |
C2—C1—C4 | 131.6 (2) | C13—C14—C15 | 120.0 (2) |
C1—C2—C3 | 106.38 (19) | C13—C14—H14 | 120.0 |
C1—C2—H2 | 126.8 | C15—C14—H14 | 120.0 |
C3—C2—H2 | 126.8 | C14—C15—C10 | 121.2 (2) |
N1—C3—C2 | 111.04 (18) | C14—C15—H15 | 119.4 |
N1—C3—C10 | 119.27 (18) | C10—C15—H15 | 119.4 |
C2—C3—C10 | 129.68 (19) | C21—C16—C17 | 118.79 (19) |
C9—C4—C5 | 118.9 (2) | C21—C16—N2 | 118.11 (18) |
C9—C4—C1 | 120.2 (2) | C17—C16—N2 | 123.06 (18) |
C5—C4—C1 | 120.87 (19) | C18—C17—C16 | 121.2 (2) |
C6—C5—C4 | 120.4 (2) | C18—C17—N3 | 116.36 (19) |
C6—C5—H5 | 119.8 | C16—C17—N3 | 122.39 (18) |
C4—C5—H5 | 119.8 | C19—C18—C17 | 118.2 (2) |
C7—C6—C5 | 120.0 (2) | C19—C18—H18 | 120.9 |
C7—C6—H6 | 120.0 | C17—C18—H18 | 120.9 |
C5—C6—H6 | 120.0 | C18—C19—C20 | 122.3 (2) |
C8—C7—C6 | 120.1 (2) | C18—C19—N4 | 118.3 (2) |
C8—C7—H7 | 120.0 | C20—C19—N4 | 119.4 (2) |
C6—C7—H7 | 120.0 | C21—C20—C19 | 118.9 (2) |
C7—C8—C9 | 120.1 (2) | C21—C20—H20 | 120.6 |
C7—C8—H8 | 120.0 | C19—C20—H20 | 120.6 |
C9—C8—H8 | 120.0 | C20—C21—C16 | 120.4 (2) |
C8—C9—C4 | 120.4 (2) | C20—C21—H21 | 119.8 |
C8—C9—H9 | 119.8 | C16—C21—H21 | 119.8 |
C4—C9—H9 | 119.8 | ||
C3—N1—N2—C1 | 1.4 (2) | C11—C12—C13—C14 | 0.3 (4) |
C3—N1—N2—C16 | −173.15 (17) | C12—C13—C14—C15 | 0.3 (5) |
N1—N2—C1—C2 | −1.6 (2) | C13—C14—C15—C10 | −0.3 (4) |
C16—N2—C1—C2 | 172.1 (2) | C11—C10—C15—C14 | −0.2 (4) |
N1—N2—C1—C4 | 174.98 (19) | C3—C10—C15—C14 | −179.9 (3) |
C16—N2—C1—C4 | −11.4 (3) | C1—N2—C16—C21 | 135.4 (2) |
N2—C1—C2—C3 | 1.1 (2) | N1—N2—C16—C21 | −51.2 (3) |
C4—C1—C2—C3 | −175.0 (2) | C1—N2—C16—C17 | −42.3 (3) |
N2—N1—C3—C2 | −0.6 (2) | N1—N2—C16—C17 | 131.2 (2) |
N2—N1—C3—C10 | −179.24 (18) | C21—C16—C17—C18 | −5.3 (3) |
C1—C2—C3—N1 | −0.3 (2) | N2—C16—C17—C18 | 172.3 (2) |
C1—C2—C3—C10 | 178.1 (2) | C21—C16—C17—N3 | 171.68 (19) |
N2—C1—C4—C9 | 142.0 (2) | N2—C16—C17—N3 | −10.7 (3) |
C2—C1—C4—C9 | −42.4 (4) | O2—N3—C17—C18 | −32.5 (3) |
N2—C1—C4—C5 | −38.4 (3) | O1—N3—C17—C18 | 144.9 (2) |
C2—C1—C4—C5 | 137.2 (3) | O2—N3—C17—C16 | 150.3 (2) |
C9—C4—C5—C6 | −3.2 (3) | O1—N3—C17—C16 | −32.3 (3) |
C1—C4—C5—C6 | 177.2 (2) | C16—C17—C18—C19 | 3.6 (3) |
C4—C5—C6—C7 | 1.6 (3) | N3—C17—C18—C19 | −173.60 (19) |
C5—C6—C7—C8 | 1.0 (4) | C17—C18—C19—C20 | 0.8 (3) |
C6—C7—C8—C9 | −2.0 (4) | C17—C18—C19—N4 | −178.7 (2) |
C7—C8—C9—C4 | 0.4 (4) | O4—N4—C19—C18 | −169.8 (2) |
C5—C4—C9—C8 | 2.2 (3) | O3—N4—C19—C18 | 10.5 (3) |
C1—C4—C9—C8 | −178.2 (2) | O4—N4—C19—C20 | 10.6 (3) |
N1—C3—C10—C15 | 8.4 (3) | O3—N4—C19—C20 | −169.1 (2) |
C2—C3—C10—C15 | −169.9 (2) | C18—C19—C20—C21 | −3.4 (3) |
N1—C3—C10—C11 | −171.3 (2) | N4—C19—C20—C21 | 176.2 (2) |
C2—C3—C10—C11 | 10.4 (4) | C19—C20—C21—C16 | 1.6 (3) |
C15—C10—C11—C12 | 0.8 (4) | C17—C16—C21—C20 | 2.7 (3) |
C3—C10—C11—C12 | −179.5 (2) | N2—C16—C21—C20 | −175.03 (19) |
C10—C11—C12—C13 | −0.8 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
C21—H21···O1i | 0.95 | 2.48 | 3.366 (3) | 156 |
Symmetry code: (i) x+1/2, −y+1/2, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C21—H21···O1i | 0.95 | 2.48 | 3.366 (3) | 156 |
Symmetry code: (i) x+1/2, −y+1/2, −z+1. |
Acknowledgements
The support of NSF–MRI Grant No. 1228232 for the purchase of the diffractometer and Tulane University for support of the Tulane Crystallography Laboratory are gratefully acknowledged.
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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.
The heterocyclic pyrazole scaffold compounds demonstrate a remarkable wide range of pharmacological activities such as anti-inflammatory (Szabó et al., 2008), anti-bacterial, antifungal (Tanitame et al., 2005), hypoglycemic (Cottineau et al., 2002; Mokhtar & El-Khawass, 1988), inhibition of cyclooxigenase-2 (Rida et al., 2009) and anti-angiogenic (Abadi et al., 2003). Different pyrazole derivatives have also shown anti-proliferative and antitumor activities (Sharma et al., 2014). More recently, the pyrazole ring system represents an advantageous choice for the synthesis of pharmaceutical compounds with different activities and good safety profiles (Mykhailiuk, 2015). In this context and following our on-going study of the synthesis of bio-active heterocyclic molecules we report in this study the synthesis and crystal structure of the title compound.
In the title compound (Fig. 1), the phenyl rings C4—C9 and C10—C15 make dihedral angles of 39.61 (8) and 9.4 (1)°, respectively, with the central pyrazole ring. The dihedral angle between the pyrazole and dinitrophenyl rings is 46.95 (5)°. The molecules form helical stacks running parallel to the a axis assisted by weak, intermolecular C21—H21···O1i (i: x + 1/2, -y + 1/2, -z + 1) interactions (Figs. 2 and 3 and Table 1).