supplementary materials


HTML versionpdf versioncif file3d viewstructure factorssupplementary materialsCIF check reportsimilar papers Open access

lh2607 scheme

Acta Cryst. (2008). E64, o859    [ doi:10.1107/S1600536808009951 ]

Methyl 3-oxo-2,3-dihydro-1,2-benzothiazole-2-acetate 1,1-dioxide

W. A. Siddiqui, S. Ahmad, H. L. Siddiqui, M. Parvez and R. Rashid

Abstract top

The title molecule, C10H9NO5S, is composed of two essentially planar units with a dihedral angle of 89.16 (6)° between them. In the crystal structure, there are weak intermolecular C-H...O interactions resulting in dimeric pairs of molecules about inversion centres and chains of molecules extended along the a and c axes, thus stabilizing the structure. In addition, benzothiazole rings lying parallel to each other with centroid-centroid distances of 3.679 (2) and 3.999 (2) Å indicate the existence of [pi]-[pi] stacking interactions.

Comment top

Saccharin derivatives are considered to be the most potent orally active human leucocyte elastase (HLE) inhibitors for the treatment of chronic obstructive pulmonary disease (COPD), acute respiratory distress syndrome (ARDS), cystic fibrosis, asthma and other inflammatory diseases (Kapui et al., 2003). Various biologically important saccharin skeletons and their N-alkyl derivatives were efficiently prepared (Xu et al., 2006) by chromium oxide-catalyzed oxidation of N-alkyl(o-methyl)arenesulfonamides in acetonitrile besides the already developed methodology utilizing irradiation techniques for similar type of conversions (Masashi et al., 1999). In continuation to our research on benzene, 1,2-benzothiazine 1,1-dioxide and saccharin derivatives (Siddiqui et al., 2008; Siddiqui, Ahmad, Khan, Siddiqui & Weaver, 2007), we report herein the crystal structure of the title compound, (I).

The structure of (I) is composed of an essentially planar moiety, S1/N1/O1/C1—C7 with maximum deviations from the least-square planes being: O1 = -0.0540 (12) and N1 = 0.0540 (13) Å, and an approximately planar moiety C8—C10/O4/O5 with maximum deviation of 0.0766 (13) Å for C8. The two moieties are oriented with a dihedral angle of 89.16 (6)° between their least-squares planes. The structure is stabilized by four rather weak intermolecular interactions of the type C—H···O (Fig. 2 and Table 1). Of these interactions, C4—H4···O5 and C8—H8A···O2 H-bonds result in dimeric pairs of (I) while C10—H10···O1 and C2—H2···O5 result in chains of molecules extended along the a- and c-axes, respectively. The benzothiazole rings in (I) lie parallel to each other about the origin with the shortest distance between the centroids of the benzene rings of the adjacent molecules is 3.679 (2) Å which indicates the existence of π-π stacking interactions. The thiazoline rings located about inversion centers in the middle of the b axis (at 0, 1/2, 0) also show π-π interaction with centroids of these rings separated by 3.999 (2) Å (Fig. 3). The molecular dimensions in (I) are in agreement with the corresponding dimensions reported in similar structures (Xu et al., 2005; Siddiqui, Ahmad, Khan, Siddiqui & Parvez, 2007; Siddiqui, Ahmad, Siddiqui et al., 2007; Siddiqui et al., 2008).

Related literature top

For related literature, see: Kapui et al. (2003); Masashi et al. (1999); Manjarrez et al. (1996); Siddiqui, Ahmad, Khan, Siddiqui & Parvez (2007); Siddiqui, Ahmad, Khan, Siddiqui & Weaver (2007); Siddiqui, Ahmad, Siddiqui et al. (2007); Siddiqui et al. (2008); Xu et al. (2005, 2006).

Experimental top

The compound (I) was prepared following the prcedures reported earlier (Manjarrez et al., 1996). Crystals suitable for X-ray crystallography were grown from a solution of CH3OH by slow evaporation at 313 K.

Refinement top

H-atoms were included in the refinements at geometrically idealized positions with aryl, methylene and methyl C—H distances 0.95, 0.99 and 0.98 Å, respectively, and Uiso = 1.2 times Ueq of the atoms to which they were bonded. The final difference map was free of any chemically significant features.

Computing details top

Data collection: COLLECT (Hooft, 1998); cell refinement: DENZO (Otwinowski & Minor, 1997); data reduction: SCALEPACK (Otwinowski & Minor, 1997); program(s) used to solve structure: SAPI91 (Fan, 1991); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. ORTEP-3 (Farrugia, 1997) drawing of (I) with displacement ellipsoids plotted at 50% probability level.
[Figure 2] Fig. 2. Unit cell packing of (I) showing C—H···O interactions represented by dashed lines; H-atoms not involved in H-bonds have been omitted.
[Figure 3] Fig. 3. Unit cell packing of (I) showing π-π stacking interactions represented by dashed lines; H-atoms have been omitted for clarity.
Methyl 3-oxo-2,3-dihydro-1,2-benzothiazole-2-acetate 1,1-dioxide top
Crystal data top
C10H9NO5SZ = 2
Mr = 255.24F000 = 264
Triclinic, P1Dx = 1.550 Mg m−3
Hall symbol: -P 1Mo Kα radiation
λ = 0.71073 Å
a = 7.765 (3) ÅCell parameters from 4654 reflections
b = 8.496 (3) Åθ = 3.9–27.4º
c = 8.776 (4) ŵ = 0.31 mm−1
α = 104.39 (2)ºT = 173 (2) K
β = 100.58 (2)ºBlock, colourless
γ = 94.30 (2)º0.16 × 0.10 × 0.08 mm
V = 546.8 (4) Å3
Data collection top
Nonius KappaCCD
diffractometer		2468 independent reflections
Radiation source: fine-focus sealed tube2040 reflections with I > 2σ(I)
Monochromator: graphiteRint = 0.024
T = 173(2) Kθmax = 27.4º
ω and φ scansθmin = 3.9º
Absorption correction: multi-scan
(SORTAV; Blessing, 1997)		h = −10→9
Tmin = 0.953, Tmax = 0.976k = −11→10
4654 measured reflectionsl = −11→11
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.040H-atom parameters constrained
wR(F2) = 0.111  w = 1/[σ2(Fo2) + (0.056P)2 + 0.29P]
where P = (Fo2 + 2Fc2)/3
S = 1.03(Δ/σ)max < 0.001
2468 reflectionsΔρmax = 0.46 e Å−3
155 parametersΔρmin = −0.43 e Å−3
Primary atom site location: structure-invariant direct methodsExtinction correction: none
Crystal data top
C10H9NO5Sγ = 94.30 (2)º
Mr = 255.24V = 546.8 (4) Å3
Triclinic, P1Z = 2
a = 7.765 (3) ÅMo Kα
b = 8.496 (3) ŵ = 0.31 mm−1
c = 8.776 (4) ÅT = 173 (2) K
α = 104.39 (2)º0.16 × 0.10 × 0.08 mm
β = 100.58 (2)º
Data collection top
Nonius KappaCCD
diffractometer		2468 independent reflections
Absorption correction: multi-scan
(SORTAV; Blessing, 1997)		2040 reflections with I > 2σ(I)
Tmin = 0.953, Tmax = 0.976Rint = 0.024
4654 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.040155 parameters
wR(F2) = 0.111H-atom parameters constrained
S = 1.03Δρmax = 0.46 e Å−3
2468 reflectionsΔρmin = −0.43 e Å−3
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
S10.25284 (6)0.37128 (6)1.06522 (6)0.02602 (16)
O1−0.07412 (18)0.18372 (19)0.67891 (17)0.0354 (3)
O20.40672 (17)0.29152 (17)1.08988 (17)0.0320 (3)
O30.2727 (2)0.54422 (17)1.13620 (18)0.0372 (4)
O40.3882 (2)0.14876 (17)0.70088 (18)0.0369 (4)
O50.41016 (18)0.33528 (17)0.56027 (16)0.0312 (3)
N10.1635 (2)0.3311 (2)0.87005 (18)0.0275 (4)
C10.0687 (2)0.2676 (2)1.1032 (2)0.0243 (4)
C20.0451 (3)0.2516 (2)1.2517 (2)0.0303 (4)
H20.13210.29871.34710.036*
C3−0.1118 (3)0.1633 (3)1.2543 (3)0.0325 (4)
H3−0.13210.14821.35350.039*
C4−0.2397 (3)0.0968 (2)1.1148 (3)0.0329 (5)
H4−0.34670.03841.12020.040*
C5−0.2128 (3)0.1147 (2)0.9669 (2)0.0297 (4)
H5−0.30050.06980.87160.036*
C6−0.0558 (2)0.1990 (2)0.9619 (2)0.0245 (4)
C7−0.0003 (2)0.2326 (2)0.8179 (2)0.0263 (4)
C80.2499 (3)0.3960 (2)0.7616 (2)0.0292 (4)
H8A0.32910.49720.82380.035*
H8B0.15930.42560.68190.035*
C90.3566 (2)0.2757 (2)0.6733 (2)0.0268 (4)
C100.5248 (3)0.2391 (3)0.4726 (3)0.0435 (6)
H10A0.55530.29100.39140.052*
H10B0.46380.12840.41950.052*
H10C0.63290.23290.54750.052*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
S10.0241 (3)0.0292 (3)0.0245 (3)0.00447 (18)0.00385 (18)0.00737 (18)
O10.0311 (7)0.0495 (9)0.0236 (7)0.0080 (6)0.0024 (6)0.0076 (6)
O20.0225 (7)0.0398 (8)0.0339 (8)0.0068 (6)0.0027 (6)0.0117 (6)
O30.0426 (9)0.0266 (7)0.0379 (8)0.0026 (6)0.0035 (7)0.0045 (6)
O40.0472 (9)0.0316 (8)0.0378 (8)0.0101 (7)0.0158 (7)0.0136 (6)
O50.0308 (7)0.0441 (8)0.0252 (7)0.0126 (6)0.0102 (6)0.0158 (6)
N10.0242 (8)0.0376 (9)0.0217 (8)0.0022 (7)0.0048 (6)0.0102 (7)
C10.0226 (9)0.0270 (9)0.0251 (9)0.0069 (7)0.0061 (7)0.0083 (7)
C20.0307 (10)0.0375 (11)0.0241 (10)0.0094 (8)0.0053 (8)0.0095 (8)
C30.0377 (11)0.0375 (11)0.0309 (11)0.0155 (9)0.0161 (9)0.0151 (8)
C40.0269 (10)0.0328 (10)0.0452 (12)0.0065 (8)0.0137 (9)0.0164 (9)
C50.0245 (9)0.0314 (10)0.0328 (10)0.0046 (8)0.0035 (8)0.0095 (8)
C60.0252 (9)0.0248 (9)0.0240 (9)0.0086 (7)0.0042 (7)0.0066 (7)
C70.0261 (9)0.0288 (9)0.0237 (10)0.0051 (7)0.0073 (7)0.0042 (7)
C80.0305 (10)0.0329 (10)0.0297 (10)0.0075 (8)0.0115 (8)0.0135 (8)
C90.0230 (9)0.0325 (10)0.0243 (9)0.0000 (7)0.0032 (7)0.0090 (8)
C100.0436 (13)0.0656 (15)0.0302 (11)0.0250 (11)0.0173 (10)0.0169 (10)
Geometric parameters (Å, °) top
S1—O21.4258 (15)C3—C41.389 (3)
S1—O31.4306 (15)C3—H30.9500
S1—N11.6640 (18)C4—C51.395 (3)
S1—C11.7504 (19)C4—H40.9500
O1—C71.202 (2)C5—C61.380 (3)
O4—C91.196 (2)C5—H50.9500
O5—C91.335 (2)C6—C71.492 (3)
O5—C101.449 (2)C8—C91.517 (3)
N1—C71.402 (3)C8—H8A0.9900
N1—C81.449 (2)C8—H8B0.9900
C1—C21.387 (3)C10—H10A0.9800
C1—C61.388 (3)C10—H10B0.9800
C2—C31.389 (3)C10—H10C0.9800
C2—H20.9500
O2—S1—O3116.71 (9)C6—C5—H5120.7
O2—S1—N1110.73 (9)C4—C5—H5120.7
O3—S1—N1109.35 (9)C5—C6—C1119.81 (18)
O2—S1—C1112.26 (9)C5—C6—C7127.38 (17)
O3—S1—C1112.83 (9)C1—C6—C7112.78 (17)
N1—S1—C192.26 (9)O1—C7—N1123.33 (18)
C9—O5—C10115.33 (16)O1—C7—C6128.71 (18)
C7—N1—C8122.31 (16)N1—C7—C6107.93 (16)
C7—N1—S1116.00 (13)N1—C8—C9112.82 (16)
C8—N1—S1121.68 (13)N1—C8—H8A109.0
C2—C1—C6122.73 (18)C9—C8—H8A109.0
C2—C1—S1126.37 (15)N1—C8—H8B109.0
C6—C1—S1110.90 (14)C9—C8—H8B109.0
C1—C2—C3116.80 (19)H8A—C8—H8B107.8
C1—C2—H2121.6O4—C9—O5125.61 (18)
C3—C2—H2121.6O4—C9—C8125.59 (18)
C2—C3—C4121.34 (19)O5—C9—C8108.80 (16)
C2—C3—H3119.3O5—C10—H10A109.5
C4—C3—H3119.3O5—C10—H10B109.5
C3—C4—C5120.73 (19)H10A—C10—H10B109.5
C3—C4—H4119.6O5—C10—H10C109.5
C5—C4—H4119.6H10A—C10—H10C109.5
C6—C5—C4118.57 (18)H10B—C10—H10C109.5
O2—S1—N1—C7111.37 (15)C2—C1—C6—C51.8 (3)
O3—S1—N1—C7−118.66 (15)S1—C1—C6—C5−178.65 (14)
C1—S1—N1—C7−3.48 (15)C2—C1—C6—C7−179.84 (17)
O2—S1—N1—C8−69.24 (17)S1—C1—C6—C7−0.3 (2)
O3—S1—N1—C860.73 (17)C8—N1—C7—O16.2 (3)
C1—S1—N1—C8175.91 (15)S1—N1—C7—O1−174.37 (15)
O2—S1—C1—C268.07 (19)C8—N1—C7—C6−175.64 (16)
O3—S1—C1—C2−66.31 (19)S1—N1—C7—C63.7 (2)
N1—S1—C1—C2−178.43 (18)C5—C6—C7—O1−5.9 (3)
O2—S1—C1—C6−111.44 (14)C1—C6—C7—O1175.94 (19)
O3—S1—C1—C6114.19 (14)C5—C6—C7—N1176.14 (18)
N1—S1—C1—C62.07 (14)C1—C6—C7—N1−2.0 (2)
C6—C1—C2—C3−0.4 (3)C7—N1—C8—C9−84.4 (2)
S1—C1—C2—C3−179.86 (15)S1—N1—C8—C996.29 (18)
C1—C2—C3—C4−1.0 (3)C10—O5—C9—O4−3.8 (3)
C2—C3—C4—C51.0 (3)C10—O5—C9—C8175.82 (16)
C3—C4—C5—C60.4 (3)N1—C8—C9—O4−9.1 (3)
C4—C5—C6—C1−1.8 (3)N1—C8—C9—O5171.21 (15)
C4—C5—C6—C7−179.84 (17)
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C2—H2···O5i0.952.533.435 (3)160
C4—H4···O4ii0.952.543.209 (3)128
C8—H8A···O2iii0.992.493.435 (3)159
C10—H10C···O1iv0.982.473.431 (3)167
Symmetry codes: (i) x, y, z+1; (ii) −x, −y, −z+2; (iii) −x+1, −y+1, −z+2; (iv) x+1, y, z.
Table 1
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
C2—H2···O5i0.952.533.435 (3)160
C4—H4···O4ii0.952.543.209 (3)128
C8—H8A···O2iii0.992.493.435 (3)159
C10—H10C···O1iv0.982.473.431 (3)167
Symmetry codes: (i) x, y, z+1; (ii) −x, −y, −z+2; (iii) −x+1, −y+1, −z+2; (iv) x+1, y, z.
references
References top

Blessing, R. H. (1997). J. Appl. Cryst. 30, 421–426.

Fan, H.-F. (1991). SAPI91. Rigaku Corporation, Tokyo, Japan.

Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.

Hooft, R. (1998). COLLECT. Nonius BV, Delft, The Netherlands.

Kapui, Z., Varga, M., Urban-Szabo, K., Mikus, E., Szabo, T., Szeredi, J., Finance, O. & Aranyi, P. (2003). J. Pharmacol. Exp. Ther. 305, 1–9.

Manjarrez, N., Pérez, H. I., Solís, A. & Luna, H. (1996). Synth. Commun. 26, 585–591.

Masashi, K., Hideo, T., Kentaro, Y. & Masataka, Y. (1999). Tetrahedron, 55, 14885–14900.

Otwinowski, Z. & Minor, W. (1997). Methods in Enzymology, Vol. 276, Macromolecular Crystallography, Part A, edited by C. W. Carter Jr & R. M. Sweet, pp. 307–326. New York: Academic Press.

Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.

Siddiqui, W. A., Ahmad, S., Khan, I. U., Siddiqui, H. L. & Parvez, M. (2007). Acta Cryst. E63, o4116.

Siddiqui, W. A., Ahmad, S., Khan, I. U., Siddiqui, H. L. & Weaver, G. W. (2007). Synth. Commun. 37, 767–773.

Siddiqui, W. A., Ahmad, S., Siddiqui, H. L., Tariq, M. I. & Parvez, M. (2007). Acta Cryst. E63, o4001.

Siddiqui, W. A., Ahmad, S., Tariq, M. I., Siddiqui, H. L. & Parvez, M. (2008). Acta Cryst. C64, o4–o6.

Xu, L., Shu, H., Liu, Y., Zhang, S. & Trudell, M. (2006). Tetrahedron, 62, 7902–7910.

Xu, L.-Z., Si, G.-D., Li, Z.-F., Yang, S.-H. & Li, K. (2005). Acta Cryst. E61, o1329–o1330.