organic compounds
2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo[4,3-c][1,2]benzothiazin-2-yl)-N′-(3-methoxybenzylidene)acetohydrazide dimethylformamide hemisolvate
aInstitute of Chemistry, University of the Punjab, Lahore 54590, Pakistan, bApplied Chemistry Research Centre, PCSIR Laboratories Complex, Lahore 54600, Pakistan, cDepartment of Chemistry, University of Baluchistan, Quetta 6700, Pakistan, dDepartment of Chemistry, Gomal University, Dera Ismail Khan, Pakistan, and eDepartment of Chemistry, The University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
*Correspondence e-mail: drhamidlatif@yahoo.com
In the title compound, C21H21N5O4S·0.5C3H7NO, the heterocyclic thiazine ring adopts a half-chair conformation, with the S and N atoms displaced by −0.451 (5) and 0.233 (5) Å, respectively, from the plane formed by the remaining ring atoms. The contains a disordered half-molecule of solvent lying close to inversion centers. The is stabilized by weak intermolecular N—H⋯O and C—H⋯O interactions.
Related literature
For related structures, see: Ahmad et al. (2008; 2009, 2011); Siddiqui et al. (2008). For puckering parameters, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: COLLECT (Hooft, 1998); cell DENZO (Otwinowski & Minor, 1997); data reduction: SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810052177/jh2242sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810052177/jh2242Isup2.hkl
A mixture of 2-(3,4-dimethyl-5,5-dioxidopyrazolo[4,3-c][1,2]benzothiazin -2(4H)-yl)acetohydrazide (1.0 g, 3.12 mmol) and 3-methoxybenzaldehyde (0.42 g, 3.12 mmol) were dissolved in ethanol (50 ml) followed by the addition of 2 drops of glacial acetic acid. The mixture was subjected to reflux for 4 - 5 h. The completion of reaction was monitored with the help of thin layer
(TLC). The precipitates formed were collected and washed with methanol (yield = 80%). The crystals of (I) suitable for crystallographic analysis were grown from its solution in dimethylformamide at room temperature by slow evaporation.All the H atoms were discernible in the difference
However, they were positioned at the idealized positions and refined by the riding-model approximation using constraints: N—H = 0.88 Å, C—H = 0.98, 0.99 and 0.95 Å for methyl, methylene and aryl H-atoms, respectively, and Uiso(H) = 1.5Ueq(methyl C-atoms) and 1.2Ueq(non-methyl C and N-atoms). The methyl groups were allowed to rotate about their axes during the refinement.In continuation to our research exploring potential biologically active derivatives of benzothiazines (Ahmad et al., 2008; 2009), we have devised the fusion of the pyrazole moiety with 1,2-benzothiazine nucleus in an attempt to synthesize novel bioactive molecules. In this paper, we report the synthesis and
of the title compound, (I).In the title molecule (Fig. 1), the heterocyclic thiazine ring adopts a half-chair conformation, with atoms S1 and N1 displaced from the plane formed by atoms C1/C6/C7/C8 by -0.451 (5) and 0.233 (5) Å, respectively. The pertinent puckering parameters (Cremer & Pople, 1975) are: Q = 0.445 (2) Å, θ = 61.8 (4)° and φ = 20.6 (4)°. Similar conformations of the corresponding rings have been reported in some closely related molecules (Siddiqui et al., 2008; (Ahmad et al., 2011). The mean-plane formed by the atoms C1–C8/C10/N2/N3 (atoms of the three fused rings excluding S1 and N1) is quite planar (maximum deviation being 0.171 (2) Å for N2) and forms an angle of 80.19 (8)° with the side chain comprised of atoms C12–C14/O3/N4/N5 which links the phenyl ring C14–C16 with the pyrazolobenzothiazin moiety; the angle between the chain atoms and the phenyl ring is 20.3 (2)°.
The intermolecular hydrogen bonds N4—H4N···O3 and C21—H21C···O1 stabilize the
Moreover, O5 of the solvate exhibits hydrogen bonding interactions with phenyl H14 and H16 atoms (Tab. 1 and Fig. 2).For related structures, see: Ahmad et al. (2008; 2009, 2011); Siddiqui et al. (2008). For puckering parameters, see: Cremer & Pople (1975).
Data collection: COLLECT (Hooft, 1998); cell
DENZO (Otwinowski & Minor, 1997); data reduction: SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C21H21N5O4S·0.5C3H7NO | F(000) = 2000 |
Mr = 476.04 | Dx = 1.391 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 5739 reflections |
a = 18.3806 (5) Å | θ = 1.0–27.5° |
b = 8.1155 (2) Å | µ = 0.19 mm−1 |
c = 30.4715 (5) Å | T = 173 K |
V = 4545.37 (18) Å3 | Plate, colorless |
Z = 8 | 0.16 × 0.14 × 0.06 mm |
Nonius KappaCCD diffractometer | 3997 independent reflections |
Radiation source: fine-focus sealed tube | 2747 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.052 |
ω and φ scans | θmax = 25.0°, θmin = 1.7° |
Absorption correction: multi-scan (SORTAV; Blessing, 1997) | h = −21→21 |
Tmin = 0.971, Tmax = 0.989 | k = −9→9 |
7438 measured reflections | l = −36→36 |
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)] = 0.056 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.09 | w = 1/[σ2(Fo2) + (0.0337P)2 + 4.9015P] where P = (Fo2 + 2Fc2)/3 |
3997 reflections | (Δ/σ)max < 0.001 |
328 parameters | Δρmax = 0.21 e Å−3 |
35 restraints | Δρmin = −0.34 e Å−3 |
C21H21N5O4S·0.5C3H7NO | V = 4545.37 (18) Å3 |
Mr = 476.04 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 18.3806 (5) Å | µ = 0.19 mm−1 |
b = 8.1155 (2) Å | T = 173 K |
c = 30.4715 (5) Å | 0.16 × 0.14 × 0.06 mm |
Nonius KappaCCD diffractometer | 3997 independent reflections |
Absorption correction: multi-scan (SORTAV; Blessing, 1997) | 2747 reflections with I > 2σ(I) |
Tmin = 0.971, Tmax = 0.989 | Rint = 0.052 |
7438 measured reflections |
R[F2 > 2σ(F2)] = 0.056 | 35 restraints |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.09 | Δρmax = 0.21 e Å−3 |
3997 reflections | Δρmin = −0.34 e Å−3 |
328 parameters |
Experimental. N'-[(3-Methoxyphenyl)methylidene]-2-(3,4-dimethyl-5,5- dioxidopyrazolo[4,3-c][1,2]benzothiazin-1(4H)-yl)acetohydrazide: White powder; mp 495–496 K. IR (KBr) cm-1: 3449; 3364; 3033; 1692; 1616; 1310; 1164. 1H-NMR (DMSO-d6) (500 MHz) δ: 2.32 (3H, s, CCH3), 2.78 (3H, s, OCH3), 2.98 (3H, s, NCH3), 5.52 (2H, s, NCH2), 6.99–7.02 (1H, dd, J = 8.2, 2.0 Hz, ArH), 7.26–7.38 (3H, m, ArH), 7.63 (1H, t, J = 7.8 Hz, ArH), 7.76 (1H, t, J = 7.6 Hz, ArH), 7.87 (1H, d, J = 7.8 Hz, ArH), 7.93 (1H, d, J = 7.7 Hz, ArH), 8.03 (1H, s, N═CH), 11.79 (1H, br s, NH). 13C NMR: 8.5, 38.9, 47.3, 51.6, 110.5, 113.6, 117.8, 123.1, 124.1, 124.5, 126.2, 126.7, 127.5, 128.3, 130.1, 131.8, 133.4, 134.2, 136.9, 139.3, 157.6, 165.7. MS m/z: 439.0(M+). |
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 | Occ. (<1) | |
S1 | −0.11871 (4) | 0.35139 (10) | 0.21689 (2) | 0.0292 (2) | |
O1 | −0.17406 (11) | 0.3405 (3) | 0.24982 (7) | 0.0414 (6) | |
O2 | −0.10532 (11) | 0.2115 (3) | 0.18941 (7) | 0.0354 (5) | |
O3 | 0.18352 (11) | 0.3040 (3) | 0.13232 (7) | 0.0337 (5) | |
O4 | 0.49365 (13) | 0.4478 (3) | −0.07548 (7) | 0.0526 (7) | |
N1 | −0.04176 (13) | 0.3984 (3) | 0.24142 (7) | 0.0284 (6) | |
N2 | 0.05545 (13) | 0.6057 (3) | 0.15386 (8) | 0.0296 (6) | |
N3 | 0.10980 (13) | 0.5444 (3) | 0.17947 (8) | 0.0294 (6) | |
N4 | 0.25112 (15) | 0.5050 (3) | 0.10038 (8) | 0.0360 (6) | |
H4N | 0.2668 | 0.6072 | 0.1021 | 0.043* | |
N5 | 0.27351 (14) | 0.4044 (3) | 0.06600 (8) | 0.0355 (7) | |
C1 | −0.13703 (16) | 0.5190 (4) | 0.18165 (9) | 0.0260 (7) | |
C2 | −0.20868 (17) | 0.5616 (4) | 0.17262 (10) | 0.0318 (7) | |
H2 | −0.2475 | 0.5085 | 0.1875 | 0.038* | |
C3 | −0.22292 (18) | 0.6821 (4) | 0.14170 (10) | 0.0372 (8) | |
H3 | −0.2718 | 0.7100 | 0.1348 | 0.045* | |
C4 | −0.16594 (18) | 0.7623 (4) | 0.12073 (10) | 0.0382 (8) | |
H4 | −0.1761 | 0.8442 | 0.0993 | 0.046* | |
C5 | −0.09438 (17) | 0.7241 (4) | 0.13074 (9) | 0.0329 (8) | |
H5 | −0.0558 | 0.7820 | 0.1169 | 0.040* | |
C6 | −0.07912 (16) | 0.6004 (4) | 0.16124 (9) | 0.0261 (7) | |
C7 | −0.00550 (16) | 0.5566 (4) | 0.17436 (9) | 0.0255 (7) | |
C8 | 0.01144 (16) | 0.4621 (4) | 0.21164 (9) | 0.0257 (7) | |
C9 | −0.04416 (17) | 0.4735 (4) | 0.28542 (9) | 0.0341 (8) | |
H9A | 0.0044 | 0.4690 | 0.2987 | 0.051* | |
H9B | −0.0787 | 0.4128 | 0.3039 | 0.051* | |
H9C | −0.0598 | 0.5885 | 0.2830 | 0.051* | |
C10 | 0.08623 (16) | 0.4549 (4) | 0.21424 (9) | 0.0283 (7) | |
C11 | 0.13593 (17) | 0.3754 (4) | 0.24619 (11) | 0.0394 (8) | |
H11A | 0.1697 | 0.3027 | 0.2306 | 0.059* | |
H11B | 0.1074 | 0.3107 | 0.2672 | 0.059* | |
H11C | 0.1635 | 0.4603 | 0.2619 | 0.059* | |
C12 | 0.18383 (16) | 0.5714 (4) | 0.16510 (10) | 0.0350 (8) | |
H12A | 0.2170 | 0.5634 | 0.1906 | 0.042* | |
H12B | 0.1883 | 0.6836 | 0.1526 | 0.042* | |
C13 | 0.20561 (16) | 0.4462 (4) | 0.13096 (9) | 0.0282 (7) | |
C14 | 0.31843 (18) | 0.4724 (4) | 0.03961 (10) | 0.0369 (8) | |
H14 | 0.3353 | 0.5807 | 0.0457 | 0.044* | |
C15 | 0.34450 (19) | 0.3878 (4) | 0.00032 (10) | 0.0374 (8) | |
C16 | 0.40459 (19) | 0.4517 (4) | −0.02106 (10) | 0.0404 (9) | |
H16 | 0.4265 | 0.5499 | −0.0104 | 0.048* | |
C17 | 0.43339 (18) | 0.3744 (4) | −0.05791 (10) | 0.0386 (8) | |
C18 | 0.4008 (2) | 0.2342 (5) | −0.07389 (10) | 0.0452 (9) | |
H18 | 0.4200 | 0.1807 | −0.0991 | 0.054* | |
C19 | 0.3398 (2) | 0.1714 (5) | −0.05311 (11) | 0.0507 (10) | |
H19 | 0.3171 | 0.0751 | −0.0645 | 0.061* | |
C20 | 0.3111 (2) | 0.2460 (5) | −0.01617 (11) | 0.0467 (9) | |
H20 | 0.2693 | 0.2016 | −0.0022 | 0.056* | |
C21 | 0.5293 (2) | 0.3652 (6) | −0.11094 (11) | 0.0629 (12) | |
H21A | 0.5449 | 0.2555 | −0.1013 | 0.094* | |
H21B | 0.5719 | 0.4291 | −0.1201 | 0.094* | |
H21C | 0.4956 | 0.3543 | −0.1357 | 0.094* | |
O5 | 0.1045 (7) | 0.3207 (11) | 0.0100 (4) | 0.161 (5) | 0.50 |
N6 | 0.0164 (11) | 0.498 (3) | 0.0059 (7) | 0.089 (5) | 0.50 |
C22 | 0.0794 (11) | 0.4396 (18) | 0.0258 (4) | 0.130 (5) | 0.50 |
H22 | 0.1006 | 0.4925 | 0.0505 | 0.156* | 0.50 |
C23 | −0.0119 (7) | 0.401 (2) | −0.0349 (5) | 0.078 (3) | 0.50 |
H23A | −0.0556 | 0.4548 | −0.0465 | 0.117* | 0.50 |
H23B | −0.0238 | 0.2876 | −0.0263 | 0.117* | 0.50 |
H23C | 0.0259 | 0.3988 | −0.0576 | 0.117* | 0.50 |
C24 | −0.0275 (10) | 0.6312 (17) | 0.0173 (7) | 0.159 (8) | 0.50 |
H24A | −0.0674 | 0.6410 | −0.0039 | 0.239* | 0.50 |
H24B | 0.0016 | 0.7324 | 0.0170 | 0.239* | 0.50 |
H24C | −0.0474 | 0.6138 | 0.0467 | 0.239* | 0.50 |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0220 (4) | 0.0321 (4) | 0.0333 (4) | −0.0047 (4) | 0.0012 (3) | 0.0040 (3) |
O1 | 0.0275 (12) | 0.0564 (15) | 0.0402 (12) | −0.0078 (12) | 0.0080 (10) | 0.0124 (11) |
O2 | 0.0345 (13) | 0.0265 (12) | 0.0451 (13) | −0.0030 (10) | −0.0045 (10) | −0.0017 (10) |
O3 | 0.0305 (12) | 0.0252 (13) | 0.0455 (13) | −0.0014 (10) | 0.0076 (10) | −0.0047 (10) |
O4 | 0.0473 (16) | 0.0686 (19) | 0.0421 (13) | 0.0044 (14) | 0.0185 (12) | 0.0017 (13) |
N1 | 0.0229 (14) | 0.0368 (15) | 0.0256 (13) | −0.0031 (12) | 0.0010 (10) | 0.0006 (11) |
N2 | 0.0238 (15) | 0.0303 (15) | 0.0346 (14) | −0.0017 (12) | 0.0051 (11) | −0.0032 (12) |
N3 | 0.0205 (14) | 0.0300 (15) | 0.0377 (14) | −0.0013 (12) | 0.0052 (11) | −0.0047 (12) |
N4 | 0.0389 (16) | 0.0227 (14) | 0.0463 (15) | −0.0037 (13) | 0.0149 (13) | −0.0102 (12) |
N5 | 0.0354 (17) | 0.0310 (16) | 0.0400 (15) | 0.0041 (13) | 0.0079 (12) | −0.0083 (12) |
C1 | 0.0223 (17) | 0.0307 (18) | 0.0249 (15) | 0.0032 (14) | 0.0007 (12) | −0.0020 (13) |
C2 | 0.0256 (18) | 0.0358 (19) | 0.0338 (17) | 0.0008 (15) | 0.0040 (13) | −0.0047 (15) |
C3 | 0.0298 (18) | 0.041 (2) | 0.0408 (19) | 0.0104 (16) | −0.0015 (14) | −0.0012 (16) |
C4 | 0.042 (2) | 0.039 (2) | 0.0342 (18) | 0.0098 (17) | 0.0012 (15) | 0.0057 (15) |
C5 | 0.0327 (19) | 0.0325 (19) | 0.0336 (17) | 0.0010 (16) | 0.0063 (14) | 0.0010 (14) |
C6 | 0.0244 (17) | 0.0272 (17) | 0.0267 (16) | 0.0011 (14) | 0.0029 (12) | −0.0050 (13) |
C7 | 0.0222 (17) | 0.0253 (17) | 0.0289 (16) | −0.0019 (14) | 0.0048 (12) | −0.0049 (13) |
C8 | 0.0225 (17) | 0.0266 (17) | 0.0279 (16) | −0.0011 (14) | 0.0009 (12) | −0.0007 (13) |
C9 | 0.037 (2) | 0.0392 (19) | 0.0262 (16) | 0.0007 (16) | 0.0005 (14) | 0.0034 (14) |
C10 | 0.0238 (17) | 0.0263 (17) | 0.0348 (17) | −0.0010 (14) | 0.0018 (13) | −0.0068 (14) |
C11 | 0.0276 (18) | 0.042 (2) | 0.0482 (19) | 0.0034 (17) | −0.0077 (14) | −0.0043 (17) |
C12 | 0.0200 (18) | 0.0377 (19) | 0.0474 (19) | −0.0050 (15) | 0.0113 (14) | −0.0116 (15) |
C13 | 0.0201 (17) | 0.0284 (18) | 0.0362 (17) | −0.0007 (14) | 0.0000 (13) | −0.0033 (14) |
C14 | 0.039 (2) | 0.0326 (19) | 0.0396 (19) | 0.0006 (17) | 0.0089 (15) | −0.0040 (15) |
C15 | 0.038 (2) | 0.037 (2) | 0.0371 (18) | 0.0060 (17) | 0.0049 (15) | 0.0006 (15) |
C16 | 0.041 (2) | 0.040 (2) | 0.0399 (19) | 0.0023 (17) | 0.0062 (16) | 0.0011 (16) |
C17 | 0.039 (2) | 0.045 (2) | 0.0317 (18) | 0.0109 (18) | 0.0045 (15) | 0.0038 (16) |
C18 | 0.050 (2) | 0.055 (2) | 0.0301 (18) | 0.012 (2) | −0.0006 (16) | −0.0068 (17) |
C19 | 0.056 (3) | 0.056 (3) | 0.040 (2) | −0.004 (2) | −0.0008 (18) | −0.0129 (18) |
C20 | 0.046 (2) | 0.054 (2) | 0.040 (2) | −0.006 (2) | 0.0046 (16) | −0.0066 (18) |
C21 | 0.056 (3) | 0.094 (3) | 0.038 (2) | 0.013 (3) | 0.0173 (18) | −0.002 (2) |
O5 | 0.238 (13) | 0.067 (6) | 0.178 (10) | −0.008 (7) | −0.069 (9) | 0.021 (6) |
N6 | 0.149 (15) | 0.046 (4) | 0.071 (10) | −0.037 (9) | 0.058 (8) | −0.009 (6) |
C22 | 0.226 (16) | 0.069 (8) | 0.094 (9) | −0.058 (9) | −0.033 (8) | 0.025 (7) |
C23 | 0.077 (9) | 0.067 (7) | 0.090 (8) | 0.001 (6) | 0.021 (6) | 0.011 (5) |
C24 | 0.207 (19) | 0.052 (9) | 0.22 (2) | −0.043 (9) | 0.168 (16) | −0.024 (11) |
S1—O1 | 1.432 (2) | C10—C11 | 1.483 (4) |
S1—O2 | 1.432 (2) | C11—H11A | 0.9800 |
S1—N1 | 1.645 (2) | C11—H11B | 0.9800 |
S1—C1 | 1.765 (3) | C11—H11C | 0.9800 |
O3—C13 | 1.224 (4) | C12—C13 | 1.508 (4) |
O4—C17 | 1.367 (4) | C12—H12A | 0.9900 |
O4—C21 | 1.431 (4) | C12—H12B | 0.9900 |
N1—C8 | 1.431 (4) | C14—C15 | 1.461 (4) |
N1—C9 | 1.473 (4) | C14—H14 | 0.9500 |
N2—C7 | 1.343 (4) | C15—C16 | 1.383 (5) |
N2—N3 | 1.362 (3) | C15—C20 | 1.398 (5) |
N3—C10 | 1.356 (4) | C16—C17 | 1.391 (4) |
N3—C12 | 1.446 (4) | C16—H16 | 0.9500 |
N4—C13 | 1.340 (4) | C17—C18 | 1.375 (5) |
N4—N5 | 1.390 (3) | C18—C19 | 1.386 (5) |
N4—H4N | 0.8800 | C18—H18 | 0.9500 |
N5—C14 | 1.278 (4) | C19—C20 | 1.382 (5) |
C1—C2 | 1.389 (4) | C19—H19 | 0.9500 |
C1—C6 | 1.399 (4) | C20—H20 | 0.9500 |
C2—C3 | 1.383 (4) | C21—H21A | 0.9800 |
C2—H2 | 0.9500 | C21—H21B | 0.9800 |
C3—C4 | 1.389 (5) | C21—H21C | 0.9800 |
C3—H3 | 0.9500 | O5—C22 | 1.173 (18) |
C4—C5 | 1.385 (4) | N6—C22 | 1.39 (2) |
C4—H4 | 0.9500 | N6—C24 | 1.39 (3) |
C5—C6 | 1.397 (4) | N6—C23 | 1.56 (3) |
C5—H5 | 0.9500 | C22—H22 | 0.9500 |
C6—C7 | 1.455 (4) | C23—H23A | 0.9800 |
C7—C8 | 1.405 (4) | C23—H23B | 0.9800 |
C8—C10 | 1.378 (4) | C23—H23C | 0.9800 |
C9—H9A | 0.9800 | C24—H24A | 0.9800 |
C9—H9B | 0.9800 | C24—H24B | 0.9800 |
C9—H9C | 0.9800 | C24—H24C | 0.9800 |
O1—S1—O2 | 118.88 (14) | H11B—C11—H11C | 109.5 |
O1—S1—N1 | 107.87 (13) | N3—C12—C13 | 110.9 (3) |
O2—S1—N1 | 107.57 (13) | N3—C12—H12A | 109.5 |
O1—S1—C1 | 109.78 (14) | C13—C12—H12A | 109.5 |
O2—S1—C1 | 106.74 (13) | N3—C12—H12B | 109.5 |
N1—S1—C1 | 105.18 (13) | C13—C12—H12B | 109.5 |
C17—O4—C21 | 117.6 (3) | H12A—C12—H12B | 108.0 |
C8—N1—C9 | 116.6 (2) | O3—C13—N4 | 124.5 (3) |
C8—N1—S1 | 112.53 (18) | O3—C13—C12 | 121.6 (3) |
C9—N1—S1 | 118.9 (2) | N4—C13—C12 | 113.9 (3) |
C7—N2—N3 | 103.7 (2) | N5—C14—C15 | 121.6 (3) |
C10—N3—N2 | 114.1 (2) | N5—C14—H14 | 119.2 |
C10—N3—C12 | 128.2 (3) | C15—C14—H14 | 119.2 |
N2—N3—C12 | 117.5 (2) | C16—C15—C20 | 119.3 (3) |
C13—N4—N5 | 120.0 (3) | C16—C15—C14 | 118.2 (3) |
C13—N4—H4N | 120.0 | C20—C15—C14 | 122.5 (3) |
N5—N4—H4N | 120.0 | C15—C16—C17 | 121.0 (3) |
C14—N5—N4 | 114.3 (3) | C15—C16—H16 | 119.5 |
C2—C1—C6 | 121.1 (3) | C17—C16—H16 | 119.5 |
C2—C1—S1 | 119.5 (2) | O4—C17—C18 | 125.1 (3) |
C6—C1—S1 | 119.3 (2) | O4—C17—C16 | 115.3 (3) |
C3—C2—C1 | 119.4 (3) | C18—C17—C16 | 119.6 (3) |
C3—C2—H2 | 120.3 | C17—C18—C19 | 119.7 (3) |
C1—C2—H2 | 120.3 | C17—C18—H18 | 120.1 |
C2—C3—C4 | 120.1 (3) | C19—C18—H18 | 120.1 |
C2—C3—H3 | 119.9 | C20—C19—C18 | 121.3 (4) |
C4—C3—H3 | 119.9 | C20—C19—H19 | 119.4 |
C5—C4—C3 | 120.6 (3) | C18—C19—H19 | 119.4 |
C5—C4—H4 | 119.7 | C19—C20—C15 | 119.1 (3) |
C3—C4—H4 | 119.7 | C19—C20—H20 | 120.4 |
C4—C5—C6 | 119.9 (3) | C15—C20—H20 | 120.4 |
C4—C5—H5 | 120.1 | O4—C21—H21A | 109.5 |
C6—C5—H5 | 120.1 | O4—C21—H21B | 109.5 |
C5—C6—C1 | 118.9 (3) | H21A—C21—H21B | 109.5 |
C5—C6—C7 | 123.0 (3) | O4—C21—H21C | 109.5 |
C1—C6—C7 | 118.0 (3) | H21A—C21—H21C | 109.5 |
N2—C7—C8 | 110.7 (3) | H21B—C21—H21C | 109.5 |
N2—C7—C6 | 125.1 (3) | C22—N6—C24 | 130 (2) |
C8—C7—C6 | 124.1 (3) | C22—N6—C23 | 116.9 (19) |
C10—C8—C7 | 106.9 (3) | C24—N6—C23 | 113.4 (15) |
C10—C8—N1 | 129.0 (3) | O5—C22—N6 | 115.5 (16) |
C7—C8—N1 | 124.0 (3) | O5—C22—H22 | 122.3 |
N1—C9—H9A | 109.5 | N6—C22—H22 | 122.3 |
N1—C9—H9B | 109.5 | N6—C23—H23A | 109.5 |
H9A—C9—H9B | 109.5 | N6—C23—H23B | 109.5 |
N1—C9—H9C | 109.5 | H23A—C23—H23B | 109.5 |
H9A—C9—H9C | 109.5 | N6—C23—H23C | 109.5 |
H9B—C9—H9C | 109.5 | H23A—C23—H23C | 109.5 |
N3—C10—C8 | 104.5 (3) | H23B—C23—H23C | 109.5 |
N3—C10—C11 | 123.3 (3) | N6—C24—H24A | 109.5 |
C8—C10—C11 | 132.1 (3) | N6—C24—H24B | 109.5 |
C10—C11—H11A | 109.5 | H24A—C24—H24B | 109.5 |
C10—C11—H11B | 109.5 | N6—C24—H24C | 109.5 |
H11A—C11—H11B | 109.5 | H24A—C24—H24C | 109.5 |
C10—C11—H11C | 109.5 | H24B—C24—H24C | 109.5 |
H11A—C11—H11C | 109.5 | ||
O1—S1—N1—C8 | −161.7 (2) | C9—N1—C8—C10 | 65.6 (4) |
O2—S1—N1—C8 | 68.9 (2) | S1—N1—C8—C10 | −151.9 (3) |
C1—S1—N1—C8 | −44.6 (2) | C9—N1—C8—C7 | −110.0 (3) |
O1—S1—N1—C9 | −20.2 (3) | S1—N1—C8—C7 | 32.6 (4) |
O2—S1—N1—C9 | −149.5 (2) | N2—N3—C10—C8 | −1.6 (3) |
C1—S1—N1—C9 | 97.0 (2) | C12—N3—C10—C8 | −176.8 (3) |
C7—N2—N3—C10 | 2.0 (3) | N2—N3—C10—C11 | 179.4 (3) |
C7—N2—N3—C12 | 177.7 (3) | C12—N3—C10—C11 | 4.3 (5) |
C13—N4—N5—C14 | −178.1 (3) | C7—C8—C10—N3 | 0.5 (3) |
O1—S1—C1—C2 | −33.0 (3) | N1—C8—C10—N3 | −175.6 (3) |
O2—S1—C1—C2 | 97.1 (2) | C7—C8—C10—C11 | 179.4 (3) |
N1—S1—C1—C2 | −148.9 (2) | N1—C8—C10—C11 | 3.2 (6) |
O1—S1—C1—C6 | 150.8 (2) | C10—N3—C12—C13 | 93.3 (4) |
O2—S1—C1—C6 | −79.1 (3) | N2—N3—C12—C13 | −81.7 (3) |
N1—S1—C1—C6 | 34.9 (3) | N5—N4—C13—O3 | 3.3 (5) |
C6—C1—C2—C3 | 2.5 (5) | N5—N4—C13—C12 | −177.7 (3) |
S1—C1—C2—C3 | −173.6 (2) | N3—C12—C13—O3 | −35.0 (4) |
C1—C2—C3—C4 | −1.6 (5) | N3—C12—C13—N4 | 145.9 (3) |
C2—C3—C4—C5 | −0.6 (5) | N4—N5—C14—C15 | −176.6 (3) |
C3—C4—C5—C6 | 1.9 (5) | N5—C14—C15—C16 | −165.5 (3) |
C4—C5—C6—C1 | −1.0 (4) | N5—C14—C15—C20 | 14.5 (5) |
C4—C5—C6—C7 | −178.2 (3) | C20—C15—C16—C17 | −1.8 (5) |
C2—C1—C6—C5 | −1.2 (4) | C14—C15—C16—C17 | 178.1 (3) |
S1—C1—C6—C5 | 174.9 (2) | C21—O4—C17—C18 | −5.6 (5) |
C2—C1—C6—C7 | 176.1 (3) | C21—O4—C17—C16 | 174.5 (3) |
S1—C1—C6—C7 | −7.7 (4) | C15—C16—C17—O4 | −178.7 (3) |
N3—N2—C7—C8 | −1.6 (3) | C15—C16—C17—C18 | 1.4 (5) |
N3—N2—C7—C6 | 175.9 (3) | O4—C17—C18—C19 | 179.9 (3) |
C5—C6—C7—N2 | −12.6 (5) | C16—C17—C18—C19 | −0.1 (5) |
C1—C6—C7—N2 | 170.1 (3) | C17—C18—C19—C20 | −0.6 (5) |
C5—C6—C7—C8 | 164.5 (3) | C18—C19—C20—C15 | 0.2 (6) |
C1—C6—C7—C8 | −12.7 (4) | C16—C15—C20—C19 | 1.1 (5) |
N2—C7—C8—C10 | 0.7 (3) | C14—C15—C20—C19 | −178.9 (3) |
C6—C7—C8—C10 | −176.8 (3) | C24—N6—C22—O5 | 178 (2) |
N2—C7—C8—N1 | 177.1 (3) | C23—N6—C22—O5 | −1 (2) |
C6—C7—C8—N1 | −0.4 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4N···O3i | 0.88 | 2.06 | 2.878 (3) | 155 |
C14—H14···O5i | 0.95 | 2.49 | 3.287 (10) | 142 |
C16—H16···O5i | 0.95 | 2.35 | 3.145 (11) | 140 |
C21—H21C···O2ii | 0.98 | 2.53 | 3.497 (5) | 169 |
C9—H9B···O1 | 0.98 | 2.48 | 2.836 (4) | 101 |
Symmetry codes: (i) −x+1/2, y+1/2, z; (ii) x+1/2, −y+1/2, −z. |
Experimental details
Crystal data | |
Chemical formula | C21H21N5O4S·0.5C3H7NO |
Mr | 476.04 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 173 |
a, b, c (Å) | 18.3806 (5), 8.1155 (2), 30.4715 (5) |
V (Å3) | 4545.37 (18) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.19 |
Crystal size (mm) | 0.16 × 0.14 × 0.06 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | Multi-scan (SORTAV; Blessing, 1997) |
Tmin, Tmax | 0.971, 0.989 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7438, 3997, 2747 |
Rint | 0.052 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.056, 0.125, 1.09 |
No. of reflections | 3997 |
No. of parameters | 328 |
No. of restraints | 35 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.21, −0.34 |
Computer programs: COLLECT (Hooft, 1998), DENZO (Otwinowski & Minor, 1997), SCALEPACK (Otwinowski & Minor, 1997), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997).
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4N···O3i | 0.88 | 2.06 | 2.878 (3) | 155 |
C14—H14···O5i | 0.95 | 2.49 | 3.287 (10) | 142 |
C16—H16···O5i | 0.95 | 2.35 | 3.145 (11) | 140 |
C21—H21C···O2ii | 0.98 | 2.53 | 3.497 (5) | 169 |
C9—H9B···O1 | 0.98 | 2.48 | 2.836 (4) | 101 |
Symmetry codes: (i) −x+1/2, y+1/2, z; (ii) x+1/2, −y+1/2, −z. |
Acknowledgements
The authors are grateful to the Higher Education Commission, Pakistan, and the Institute of Chemistry, University of the Punjab, Lahore, Pakistan for financial assistance.
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.
In continuation to our research exploring potential biologically active derivatives of benzothiazines (Ahmad et al., 2008; 2009), we have devised the fusion of the pyrazole moiety with 1,2-benzothiazine nucleus in an attempt to synthesize novel bioactive molecules. In this paper, we report the synthesis and crystal structure of the title compound, (I).
In the title molecule (Fig. 1), the heterocyclic thiazine ring adopts a half-chair conformation, with atoms S1 and N1 displaced from the plane formed by atoms C1/C6/C7/C8 by -0.451 (5) and 0.233 (5) Å, respectively. The pertinent puckering parameters (Cremer & Pople, 1975) are: Q = 0.445 (2) Å, θ = 61.8 (4)° and φ = 20.6 (4)°. Similar conformations of the corresponding rings have been reported in some closely related molecules (Siddiqui et al., 2008; (Ahmad et al., 2011). The mean-plane formed by the atoms C1–C8/C10/N2/N3 (atoms of the three fused rings excluding S1 and N1) is quite planar (maximum deviation being 0.171 (2) Å for N2) and forms an angle of 80.19 (8)° with the side chain comprised of atoms C12–C14/O3/N4/N5 which links the phenyl ring C14–C16 with the pyrazolobenzothiazin moiety; the angle between the chain atoms and the phenyl ring is 20.3 (2)°.
The intermolecular hydrogen bonds N4—H4N···O3 and C21—H21C···O1 stabilize the crystal structure. Moreover, O5 of the solvate exhibits hydrogen bonding interactions with phenyl H14 and H16 atoms (Tab. 1 and Fig. 2).