organic compounds
4-Hydroxy-2-[(4-iodobenzoyl)methyl]-3-(3-methoxybenzoyl)-2H-1,2-benzothiazine 1,1-dioxide
aInstitute of Chemistry, University of the Punjab, Lahore 54590, Pakistan, bApplied Chemistry Research Centre, PCSIR Laboratories Complex, Lahore 54600, Pakistan, and cDepartment of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4
*Correspondence e-mail: drhamidlatif@yahoo.com
In the title molecule, C24H18INO6S, the heterocyclic thiazine ring adopts a half-chair conformation, with the S and N atoms displaced by 0.381 (5) and −0.449 (5) Å, respectively, from the plane formed by the remaining atoms in the ring; the puckering parameters are Q = 0.550 (2) Å, θ = 61.7 (2)° and φ = 31.4 (3)°. The conformation is stabilized by an intramolecular O—H⋯O hydrogen bond. The two nonfused benzene rings lie almost parallel to each other [dihedral angle = 9.18 (4)°], with a separation of 3.754 (2) Å between the centres of gravity of the two rings, indicating strong π–π interactions.
Related literature
For biological applications of benzothiazines, see: Lombardino & Wiseman (1972); Zinnes et al. (1982); Zia-ur-Rehman et al. (2005); Turck et al. (1996); Ahmad et al. (2010). For crystal structures of related compounds, see: Siddiqui et al. (2008); Gul et al. (2010). For puckering parameters, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: COLLECT (Nonius, 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/S1600536810032265/pk2258sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810032265/pk2258Isup2.hkl
4-Hydroxy-1,1-dioxido-2H-1,2-benzothiazin-3-yl)(3-methoxyphenyl) methanone (2.0 g, 6.0 mmol), K2CO3 (1.24 g, 9.0 mmol), 4-iodophenacyl bromide (2.01 g, 6.2 mmol) and acetonitrile (25 ml) were refluxed for 6 h. The completion of reaction was monitored by TLC. After cooling to room temperature, the reaction mixture was poured into ice cold water. Yellow precipitates of the title compound obtained were filtered, washed with cold water and dried. The crystals suitable for X-ray crystallographic analysis were grown from a solution of methanol and chloroform (1:1).
The H-atoms were located from difference Fourier maps and were included in the
at geometrically idealized positions in riding-model approximation with O—H = 0.84 Å and C—H = 0.95–0.99 Å; the Uiso(H) were allowed at 1.2Ueq(C) or 1.5Ueq(O). The final difference map was essentially featurless.Benzothiazine nucleus occupies a significant position among
Oxicams are benzothiazine derivatives which are in use for the treatment of various inflammatory diseases (Lombardino & Wiseman, 1972; Zinnes et al., 1982). Besides oxicams, numerous other benzothiazine compounds are found to possess antimicrobial (Zia-ur-Rehman et al., 2005), analgesic (Turck et al., 1996), antioxidant activities (Ahmad et al., 2010). In this paper, we report the synthesis and of the title compound.The structure of the title compound contains independent molecules separated by normal van der Waals distances (Fig. 1). The heterocyclic thiazine ring adopts a half-chair conformation, with atoms S1 and N1 displaced by 0.381 (5) and -0.449 (5) Å, respectively, from the plane formed by atoms C1/C6/C7/C8; the puckering parameters (Cremer & Pople, 1975) are: Q = 0.550 (2) Å, θ = 61.7 (2)° and φ = 31.4 (3)°. Similar conformations of the corresponding rings have been reported in some closely related compounds (Siddiqui et al., 2008). Unlike the structure of 4-hydroxy-3-(3-methoxy)benzoyl-2-(3-methoxy)phenacyl-2H-1,2- benzothiazine 1,1-dioxide (Gul et al., 2010) where in the carbon fragments C1–C15 and C17–C24 were more or less planar individually and lie at an angle 77.17 (2)° with respect to each other, the benzene rings C10–C15 and C19–C24 in the title compound, lie almost parallel to each other (dihedral angle 9.18 (4)°) with a separation of 3.754 (2) Å between the centers of gravity of the two rings indicating strong π–π interactions.
The structure is stabilized by intramolecular interactions C11—H11···N1 and O3—H3O···O4 resulting in six membered rings and C17—H17A···O2 forming a five membered ring (Table 1).
For biological applications of benzothiazines, see: Lombardino & Wiseman (1972); Zinnes et al. (1982); Zia-ur-Rehman et al. (2005); Turck et al. (1996); Ahmad et al. (2010). For crystal structures of related compounds, see: Siddiqui et al. (2008); Gul et al. (2010). For puckering parameters, see: Cremer & Pople (1975).
Data collection: COLLECT (Nonius, 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).Fig. 1. The title molecule plotted with the displacement ellipsoids at 50% probability level (Farrugia, 1997). |
C24H18INO6S | F(000) = 1144 |
Mr = 575.35 | Dx = 1.692 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 5266 reflections |
a = 9.7392 (2) Å | θ = 1.0–27.5° |
b = 11.5288 (3) Å | µ = 1.55 mm−1 |
c = 20.4634 (4) Å | T = 173 K |
β = 100.5288 (11)° | Prism, yellow |
V = 2258.97 (9) Å3 | 0.12 × 0.10 × 0.08 mm |
Z = 4 |
Nonius KappaCCD diffractometer | 3960 independent reflections |
Radiation source: fine-focus sealed tube | 3620 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.017 |
ω and φ scans | θmax = 25.0°, θmin = 2.7° |
Absorption correction: multi-scan (SORTAV; Blessing, 1997) | h = −11→11 |
Tmin = 0.836, Tmax = 0.886 | k = −13→13 |
16229 measured reflections | l = −24→24 |
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)] = 0.026 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.061 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0174P)2 + 2.9397P] where P = (Fo2 + 2Fc2)/3 |
3960 reflections | (Δ/σ)max = 0.001 |
300 parameters | Δρmax = 0.76 e Å−3 |
0 restraints | Δρmin = −0.83 e Å−3 |
C24H18INO6S | V = 2258.97 (9) Å3 |
Mr = 575.35 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 9.7392 (2) Å | µ = 1.55 mm−1 |
b = 11.5288 (3) Å | T = 173 K |
c = 20.4634 (4) Å | 0.12 × 0.10 × 0.08 mm |
β = 100.5288 (11)° |
Nonius KappaCCD diffractometer | 3960 independent reflections |
Absorption correction: multi-scan (SORTAV; Blessing, 1997) | 3620 reflections with I > 2σ(I) |
Tmin = 0.836, Tmax = 0.886 | Rint = 0.017 |
16229 measured reflections |
R[F2 > 2σ(F2)] = 0.026 | 0 restraints |
wR(F2) = 0.061 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.76 e Å−3 |
3960 reflections | Δρmin = −0.83 e Å−3 |
300 parameters |
Experimental. Yield: 1.96 g, 70%, m.p. 413–414 K, IR (KBr, νmax): 2957, 1682, 1340, 1128 cm-1, EI–MS (m/z): 575.0 |
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 | ||
I1 | 0.309451 (19) | 0.222186 (19) | 0.434249 (8) | 0.04263 (8) | |
S1 | −0.12938 (6) | 0.42205 (5) | 0.72012 (3) | 0.02558 (14) | |
O1 | −0.15136 (17) | 0.53974 (15) | 0.69887 (9) | 0.0335 (4) | |
O2 | −0.18899 (17) | 0.33084 (16) | 0.67691 (9) | 0.0330 (4) | |
O3 | 0.1160 (2) | 0.56345 (19) | 0.89527 (10) | 0.0465 (5) | |
H3O | 0.1921 | 0.5875 | 0.8867 | 0.070* | |
O4 | 0.30729 (19) | 0.59168 (17) | 0.82968 (11) | 0.0448 (5) | |
O5 | 0.1389 (2) | 0.5711 (2) | 0.54065 (11) | 0.0515 (6) | |
O6 | 0.33468 (18) | 0.27269 (16) | 0.77976 (9) | 0.0310 (4) | |
N1 | 0.04075 (19) | 0.40214 (17) | 0.73891 (10) | 0.0239 (4) | |
C1 | −0.1770 (3) | 0.4068 (2) | 0.79852 (12) | 0.0281 (5) | |
C2 | −0.3034 (3) | 0.3567 (2) | 0.80468 (14) | 0.0346 (6) | |
H2 | −0.3641 | 0.3266 | 0.7668 | 0.042* | |
C3 | −0.3395 (3) | 0.3513 (3) | 0.86691 (16) | 0.0465 (7) | |
H3 | −0.4260 | 0.3178 | 0.8720 | 0.056* | |
C4 | −0.2503 (4) | 0.3946 (3) | 0.92140 (17) | 0.0563 (9) | |
H4 | −0.2765 | 0.3917 | 0.9639 | 0.068* | |
C5 | −0.1229 (3) | 0.4422 (3) | 0.91516 (15) | 0.0495 (8) | |
H5 | −0.0621 | 0.4705 | 0.9535 | 0.059* | |
C6 | −0.0831 (3) | 0.4489 (2) | 0.85358 (13) | 0.0334 (6) | |
C7 | 0.0526 (3) | 0.4997 (2) | 0.84576 (14) | 0.0343 (6) | |
C8 | 0.1083 (2) | 0.4833 (2) | 0.78869 (13) | 0.0277 (5) | |
C9 | 0.2346 (3) | 0.5410 (2) | 0.78018 (15) | 0.0350 (6) | |
C10 | 0.2832 (3) | 0.5437 (2) | 0.71554 (15) | 0.0337 (6) | |
C11 | 0.1901 (3) | 0.5553 (2) | 0.65576 (15) | 0.0359 (6) | |
H11 | 0.0927 | 0.5602 | 0.6556 | 0.043* | |
C12 | 0.2394 (3) | 0.5599 (2) | 0.59636 (16) | 0.0403 (7) | |
C13 | 0.3816 (3) | 0.5525 (3) | 0.59645 (17) | 0.0448 (7) | |
H13 | 0.4154 | 0.5543 | 0.5557 | 0.054* | |
C14 | 0.4742 (3) | 0.5427 (3) | 0.65634 (17) | 0.0461 (8) | |
H14 | 0.5716 | 0.5386 | 0.6564 | 0.055* | |
C15 | 0.4271 (3) | 0.5388 (2) | 0.71568 (16) | 0.0403 (7) | |
H15 | 0.4915 | 0.5328 | 0.7564 | 0.048* | |
C16 | 0.1815 (4) | 0.5671 (4) | 0.47757 (17) | 0.0605 (10) | |
H16A | 0.0988 | 0.5674 | 0.4422 | 0.073* | |
H16B | 0.2355 | 0.4963 | 0.4745 | 0.073* | |
H16C | 0.2394 | 0.6350 | 0.4727 | 0.073* | |
C17 | 0.0871 (3) | 0.2799 (2) | 0.75191 (12) | 0.0251 (5) | |
H17A | 0.0214 | 0.2265 | 0.7240 | 0.030* | |
H17B | 0.0890 | 0.2602 | 0.7992 | 0.030* | |
C18 | 0.2332 (3) | 0.2673 (2) | 0.73533 (12) | 0.0250 (5) | |
C19 | 0.2470 (3) | 0.2523 (2) | 0.66453 (12) | 0.0256 (5) | |
C20 | 0.1333 (3) | 0.2615 (2) | 0.61251 (13) | 0.0292 (6) | |
H20 | 0.0426 | 0.2741 | 0.6220 | 0.035* | |
C21 | 0.1508 (3) | 0.2524 (2) | 0.54714 (13) | 0.0334 (6) | |
H21 | 0.0731 | 0.2603 | 0.5119 | 0.040* | |
C22 | 0.2828 (3) | 0.2318 (2) | 0.53356 (13) | 0.0313 (6) | |
C23 | 0.3973 (3) | 0.2196 (3) | 0.58470 (14) | 0.0355 (6) | |
H23 | 0.4872 | 0.2037 | 0.5750 | 0.043* | |
C24 | 0.3789 (3) | 0.2308 (2) | 0.64959 (13) | 0.0320 (6) | |
H24 | 0.4572 | 0.2238 | 0.6847 | 0.038* |
U11 | U22 | U33 | U12 | U13 | U23 | |
I1 | 0.03981 (12) | 0.06393 (15) | 0.02580 (11) | −0.00825 (9) | 0.01039 (8) | −0.00513 (8) |
S1 | 0.0217 (3) | 0.0240 (3) | 0.0290 (3) | −0.0021 (2) | −0.0009 (2) | 0.0009 (2) |
O1 | 0.0263 (9) | 0.0271 (9) | 0.0435 (11) | 0.0010 (7) | −0.0030 (8) | 0.0076 (8) |
O2 | 0.0305 (9) | 0.0333 (10) | 0.0335 (10) | −0.0090 (8) | 0.0016 (8) | −0.0047 (8) |
O3 | 0.0362 (11) | 0.0499 (13) | 0.0488 (12) | −0.0011 (10) | −0.0046 (9) | −0.0239 (10) |
O4 | 0.0290 (10) | 0.0373 (11) | 0.0609 (13) | −0.0048 (8) | −0.0103 (9) | −0.0153 (10) |
O5 | 0.0337 (10) | 0.0716 (16) | 0.0476 (13) | 0.0016 (10) | 0.0034 (9) | 0.0235 (11) |
O6 | 0.0295 (9) | 0.0363 (10) | 0.0248 (9) | 0.0047 (8) | −0.0017 (8) | 0.0009 (8) |
N1 | 0.0211 (10) | 0.0205 (10) | 0.0281 (11) | −0.0006 (8) | −0.0011 (8) | −0.0003 (8) |
C1 | 0.0288 (13) | 0.0257 (13) | 0.0294 (13) | 0.0046 (10) | 0.0040 (10) | 0.0006 (10) |
C2 | 0.0311 (13) | 0.0314 (15) | 0.0417 (15) | 0.0026 (11) | 0.0074 (12) | 0.0027 (12) |
C3 | 0.0421 (16) | 0.0507 (19) | 0.0509 (18) | 0.0010 (15) | 0.0194 (14) | 0.0049 (15) |
C4 | 0.062 (2) | 0.072 (2) | 0.0396 (17) | 0.0041 (18) | 0.0203 (16) | 0.0002 (17) |
C5 | 0.0495 (18) | 0.061 (2) | 0.0362 (16) | 0.0040 (16) | 0.0044 (14) | −0.0104 (15) |
C6 | 0.0328 (13) | 0.0322 (15) | 0.0341 (14) | 0.0061 (11) | 0.0029 (11) | −0.0045 (11) |
C7 | 0.0291 (13) | 0.0288 (14) | 0.0403 (15) | 0.0056 (11) | −0.0066 (11) | −0.0076 (12) |
C8 | 0.0231 (12) | 0.0223 (12) | 0.0340 (14) | 0.0038 (10) | −0.0048 (10) | −0.0031 (11) |
C9 | 0.0256 (13) | 0.0203 (13) | 0.0540 (17) | 0.0053 (10) | −0.0059 (12) | −0.0003 (12) |
C10 | 0.0239 (12) | 0.0187 (13) | 0.0559 (17) | −0.0031 (10) | 0.0004 (12) | 0.0030 (12) |
C11 | 0.0221 (12) | 0.0288 (14) | 0.0542 (17) | −0.0044 (11) | 0.0001 (12) | 0.0113 (13) |
C12 | 0.0321 (14) | 0.0317 (15) | 0.0551 (18) | −0.0028 (12) | 0.0030 (13) | 0.0171 (13) |
C13 | 0.0318 (14) | 0.0421 (17) | 0.062 (2) | −0.0022 (13) | 0.0123 (14) | 0.0108 (15) |
C14 | 0.0235 (13) | 0.0397 (17) | 0.074 (2) | −0.0025 (12) | 0.0065 (14) | 0.0071 (16) |
C15 | 0.0230 (13) | 0.0295 (15) | 0.063 (2) | −0.0016 (11) | −0.0053 (13) | 0.0036 (14) |
C16 | 0.0512 (19) | 0.078 (3) | 0.053 (2) | 0.0050 (18) | 0.0125 (16) | 0.0238 (19) |
C17 | 0.0303 (13) | 0.0198 (12) | 0.0252 (12) | 0.0014 (10) | 0.0049 (10) | −0.0005 (10) |
C18 | 0.0303 (13) | 0.0178 (12) | 0.0262 (13) | 0.0029 (10) | 0.0033 (11) | 0.0017 (10) |
C19 | 0.0270 (12) | 0.0248 (13) | 0.0239 (12) | 0.0013 (10) | 0.0019 (10) | 0.0019 (10) |
C20 | 0.0249 (12) | 0.0365 (15) | 0.0259 (13) | −0.0008 (11) | 0.0035 (10) | 0.0013 (11) |
C21 | 0.0265 (13) | 0.0463 (16) | 0.0254 (13) | −0.0035 (12) | −0.0007 (10) | 0.0014 (12) |
C22 | 0.0337 (14) | 0.0378 (15) | 0.0230 (13) | −0.0045 (12) | 0.0072 (11) | −0.0024 (11) |
C23 | 0.0260 (13) | 0.0472 (17) | 0.0335 (15) | 0.0013 (12) | 0.0063 (11) | −0.0031 (13) |
C24 | 0.0257 (13) | 0.0403 (16) | 0.0277 (14) | 0.0034 (11) | −0.0014 (10) | −0.0014 (11) |
I1—C22 | 2.098 (3) | C10—C11 | 1.389 (4) |
S1—O2 | 1.4272 (18) | C10—C15 | 1.402 (4) |
S1—O1 | 1.4290 (18) | C11—C12 | 1.387 (4) |
S1—N1 | 1.6472 (19) | C11—H11 | 0.9500 |
S1—C1 | 1.758 (3) | C12—C13 | 1.388 (4) |
O3—C7 | 1.311 (3) | C13—C14 | 1.387 (4) |
O3—H3O | 0.8400 | C13—H13 | 0.9500 |
O4—C9 | 1.267 (3) | C14—C15 | 1.375 (4) |
O5—C12 | 1.366 (4) | C14—H14 | 0.9500 |
O5—C16 | 1.427 (4) | C15—H15 | 0.9500 |
O6—C18 | 1.216 (3) | C16—H16A | 0.9800 |
N1—C8 | 1.450 (3) | C16—H16B | 0.9800 |
N1—C17 | 1.489 (3) | C16—H16C | 0.9800 |
C1—C2 | 1.386 (4) | C17—C18 | 1.530 (3) |
C1—C6 | 1.402 (4) | C17—H17A | 0.9900 |
C2—C3 | 1.383 (4) | C17—H17B | 0.9900 |
C2—H2 | 0.9500 | C18—C19 | 1.489 (3) |
C3—C4 | 1.376 (5) | C19—C20 | 1.393 (3) |
C3—H3 | 0.9500 | C19—C24 | 1.396 (4) |
C4—C5 | 1.383 (5) | C20—C21 | 1.383 (4) |
C4—H4 | 0.9500 | C20—H20 | 0.9500 |
C5—C6 | 1.387 (4) | C21—C22 | 1.384 (4) |
C5—H5 | 0.9500 | C21—H21 | 0.9500 |
C6—C7 | 1.480 (4) | C22—C23 | 1.390 (4) |
C7—C8 | 1.388 (4) | C23—C24 | 1.378 (4) |
C8—C9 | 1.437 (4) | C23—H23 | 0.9500 |
C9—C10 | 1.484 (4) | C24—H24 | 0.9500 |
O2—S1—O1 | 119.32 (11) | O5—C12—C13 | 124.7 (3) |
O2—S1—N1 | 108.66 (10) | C11—C12—C13 | 120.1 (3) |
O1—S1—N1 | 106.96 (10) | C14—C13—C12 | 119.6 (3) |
O2—S1—C1 | 110.27 (12) | C14—C13—H13 | 120.2 |
O1—S1—C1 | 108.82 (12) | C12—C13—H13 | 120.2 |
N1—S1—C1 | 101.24 (11) | C15—C14—C13 | 121.0 (3) |
C7—O3—H3O | 109.5 | C15—C14—H14 | 119.5 |
C12—O5—C16 | 118.0 (2) | C13—C14—H14 | 119.5 |
C8—N1—C17 | 113.69 (18) | C14—C15—C10 | 119.5 (3) |
C8—N1—S1 | 112.47 (15) | C14—C15—H15 | 120.3 |
C17—N1—S1 | 115.63 (15) | C10—C15—H15 | 120.3 |
C2—C1—C6 | 122.1 (2) | O5—C16—H16A | 109.5 |
C2—C1—S1 | 120.8 (2) | O5—C16—H16B | 109.5 |
C6—C1—S1 | 117.17 (19) | H16A—C16—H16B | 109.5 |
C3—C2—C1 | 118.8 (3) | O5—C16—H16C | 109.5 |
C3—C2—H2 | 120.6 | H16A—C16—H16C | 109.5 |
C1—C2—H2 | 120.6 | H16B—C16—H16C | 109.5 |
C4—C3—C2 | 120.0 (3) | N1—C17—C18 | 108.30 (19) |
C4—C3—H3 | 120.0 | N1—C17—H17A | 110.0 |
C2—C3—H3 | 120.0 | C18—C17—H17A | 110.0 |
C3—C4—C5 | 120.9 (3) | N1—C17—H17B | 110.0 |
C3—C4—H4 | 119.6 | C18—C17—H17B | 110.0 |
C5—C4—H4 | 119.6 | H17A—C17—H17B | 108.4 |
C4—C5—C6 | 120.7 (3) | O6—C18—C19 | 121.9 (2) |
C4—C5—H5 | 119.6 | O6—C18—C17 | 119.4 (2) |
C6—C5—H5 | 119.6 | C19—C18—C17 | 118.7 (2) |
C5—C6—C1 | 117.5 (3) | C20—C19—C24 | 118.7 (2) |
C5—C6—C7 | 121.6 (3) | C20—C19—C18 | 122.3 (2) |
C1—C6—C7 | 120.9 (2) | C24—C19—C18 | 118.9 (2) |
O3—C7—C8 | 121.7 (2) | C21—C20—C19 | 120.8 (2) |
O3—C7—C6 | 116.2 (2) | C21—C20—H20 | 119.6 |
C8—C7—C6 | 122.1 (2) | C19—C20—H20 | 119.6 |
C7—C8—C9 | 120.9 (2) | C20—C21—C22 | 119.4 (2) |
C7—C8—N1 | 118.8 (2) | C20—C21—H21 | 120.3 |
C9—C8—N1 | 120.2 (2) | C22—C21—H21 | 120.3 |
O4—C9—C8 | 118.8 (3) | C21—C22—C23 | 120.9 (2) |
O4—C9—C10 | 118.7 (2) | C21—C22—I1 | 119.18 (19) |
C8—C9—C10 | 122.5 (2) | C23—C22—I1 | 119.96 (19) |
C11—C10—C15 | 119.8 (3) | C24—C23—C22 | 119.2 (2) |
C11—C10—C9 | 121.6 (2) | C24—C23—H23 | 120.4 |
C15—C10—C9 | 118.6 (3) | C22—C23—H23 | 120.4 |
C12—C11—C10 | 120.1 (2) | C23—C24—C19 | 121.0 (2) |
C12—C11—H11 | 120.0 | C23—C24—H24 | 119.5 |
C10—C11—H11 | 120.0 | C19—C24—H24 | 119.5 |
O5—C12—C11 | 115.2 (2) | ||
O2—S1—N1—C8 | −173.39 (16) | C7—C8—C9—C10 | −168.2 (2) |
O1—S1—N1—C8 | 56.56 (19) | N1—C8—C9—C10 | 14.9 (4) |
C1—S1—N1—C8 | −57.30 (19) | O4—C9—C10—C11 | −141.7 (3) |
O2—S1—N1—C17 | −40.51 (19) | C8—C9—C10—C11 | 38.2 (4) |
O1—S1—N1—C17 | −170.56 (17) | O4—C9—C10—C15 | 35.8 (4) |
C1—S1—N1—C17 | 75.58 (18) | C8—C9—C10—C15 | −144.3 (3) |
O2—S1—C1—C2 | −30.4 (2) | C15—C10—C11—C12 | 1.2 (4) |
O1—S1—C1—C2 | 102.2 (2) | C9—C10—C11—C12 | 178.7 (3) |
N1—S1—C1—C2 | −145.3 (2) | C16—O5—C12—C11 | −175.2 (3) |
O2—S1—C1—C6 | 150.53 (19) | C16—O5—C12—C13 | 4.5 (4) |
O1—S1—C1—C6 | −76.8 (2) | C10—C11—C12—O5 | 179.8 (2) |
N1—S1—C1—C6 | 35.6 (2) | C10—C11—C12—C13 | 0.1 (4) |
C6—C1—C2—C3 | 2.0 (4) | O5—C12—C13—C14 | 179.2 (3) |
S1—C1—C2—C3 | −177.0 (2) | C11—C12—C13—C14 | −1.1 (4) |
C1—C2—C3—C4 | −0.4 (5) | C12—C13—C14—C15 | 0.7 (5) |
C2—C3—C4—C5 | −1.0 (5) | C13—C14—C15—C10 | 0.6 (4) |
C3—C4—C5—C6 | 0.9 (5) | C11—C10—C15—C14 | −1.6 (4) |
C4—C5—C6—C1 | 0.6 (5) | C9—C10—C15—C14 | −179.2 (3) |
C4—C5—C6—C7 | 179.9 (3) | C8—N1—C17—C18 | −74.6 (2) |
C2—C1—C6—C5 | −2.0 (4) | S1—N1—C17—C18 | 153.04 (16) |
S1—C1—C6—C5 | 177.0 (2) | N1—C17—C18—O6 | 97.6 (3) |
C2—C1—C6—C7 | 178.7 (2) | N1—C17—C18—C19 | −80.6 (3) |
S1—C1—C6—C7 | −2.3 (3) | O6—C18—C19—C20 | −171.2 (2) |
C5—C6—C7—O3 | −16.8 (4) | C17—C18—C19—C20 | 6.9 (3) |
C1—C6—C7—O3 | 162.5 (2) | O6—C18—C19—C24 | 7.4 (4) |
C5—C6—C7—C8 | 164.7 (3) | C17—C18—C19—C24 | −174.5 (2) |
C1—C6—C7—C8 | −16.0 (4) | C24—C19—C20—C21 | −1.6 (4) |
O3—C7—C8—C9 | −3.4 (4) | C18—C19—C20—C21 | 177.0 (2) |
C6—C7—C8—C9 | 175.0 (2) | C19—C20—C21—C22 | 1.3 (4) |
O3—C7—C8—N1 | 173.5 (2) | C20—C21—C22—C23 | 0.3 (4) |
C6—C7—C8—N1 | −8.0 (4) | C20—C21—C22—I1 | −178.5 (2) |
C17—N1—C8—C7 | −85.5 (3) | C21—C22—C23—C24 | −1.4 (4) |
S1—N1—C8—C7 | 48.3 (3) | I1—C22—C23—C24 | 177.4 (2) |
C17—N1—C8—C9 | 91.4 (3) | C22—C23—C24—C19 | 1.0 (4) |
S1—N1—C8—C9 | −134.7 (2) | C20—C19—C24—C23 | 0.5 (4) |
C7—C8—C9—O4 | 11.6 (4) | C18—C19—C24—C23 | −178.2 (2) |
N1—C8—C9—O4 | −165.2 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H3O···O4 | 0.84 | 1.76 | 2.509 (3) | 147 |
C11—H11···N1 | 0.95 | 2.61 | 3.006 (3) | 106 |
C17—H17A···O2 | 0.99 | 2.42 | 2.902 (3) | 109 |
Experimental details
Crystal data | |
Chemical formula | C24H18INO6S |
Mr | 575.35 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 173 |
a, b, c (Å) | 9.7392 (2), 11.5288 (3), 20.4634 (4) |
β (°) | 100.5288 (11) |
V (Å3) | 2258.97 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.55 |
Crystal size (mm) | 0.12 × 0.10 × 0.08 |
Data collection | |
Diffractometer | Nonius KappaCCD |
Absorption correction | Multi-scan (SORTAV; Blessing, 1997) |
Tmin, Tmax | 0.836, 0.886 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16229, 3960, 3620 |
Rint | 0.017 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.026, 0.061, 1.08 |
No. of reflections | 3960 |
No. of parameters | 300 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.76, −0.83 |
Computer programs: COLLECT (Nonius, 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 |
O3—H3O···O4 | 0.84 | 1.76 | 2.509 (3) | 147 |
C11—H11···N1 | 0.95 | 2.61 | 3.006 (3) | 106 |
C17—H17A···O2 | 0.99 | 2.42 | 2.902 (3) | 109 |
Acknowledgements
HLS is grateful to the Institute of Chemistry, University of the Punjab, Lahore, Pakistan, for financial support.
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.
Benzothiazine nucleus occupies a significant position among heterocyclic compounds. Oxicams are benzothiazine derivatives which are in use for the treatment of various inflammatory diseases (Lombardino & Wiseman, 1972; Zinnes et al., 1982). Besides oxicams, numerous other benzothiazine compounds are found to possess antimicrobial (Zia-ur-Rehman et al., 2005), analgesic (Turck et al., 1996), antioxidant activities (Ahmad et al., 2010). In this paper, we report the synthesis and crystal structure of the title compound.
The structure of the title compound contains independent molecules separated by normal van der Waals distances (Fig. 1). The heterocyclic thiazine ring adopts a half-chair conformation, with atoms S1 and N1 displaced by 0.381 (5) and -0.449 (5) Å, respectively, from the plane formed by atoms C1/C6/C7/C8; the puckering parameters (Cremer & Pople, 1975) are: Q = 0.550 (2) Å, θ = 61.7 (2)° and φ = 31.4 (3)°. Similar conformations of the corresponding rings have been reported in some closely related compounds (Siddiqui et al., 2008). Unlike the structure of 4-hydroxy-3-(3-methoxy)benzoyl-2-(3-methoxy)phenacyl-2H-1,2- benzothiazine 1,1-dioxide (Gul et al., 2010) where in the carbon fragments C1–C15 and C17–C24 were more or less planar individually and lie at an angle 77.17 (2)° with respect to each other, the benzene rings C10–C15 and C19–C24 in the title compound, lie almost parallel to each other (dihedral angle 9.18 (4)°) with a separation of 3.754 (2) Å between the centers of gravity of the two rings indicating strong π–π interactions.
The structure is stabilized by intramolecular interactions C11—H11···N1 and O3—H3O···O4 resulting in six membered rings and C17—H17A···O2 forming a five membered ring (Table 1).