Literature DB >> 21522716

2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)-N'-(3-meth-oxy-benzyl-idene)aceto-hydrazide dimethyl-formamide hemisolvate.

Matloob Ahmad, Hamid Latif Siddiqui, Manzoor Iqbal Khattak, Saeed Ahmad, Masood Parvez.   

Abstract

In the title compound, C(21)H(21)N(5)O(4)S·0.5C(3)H(7)NO, the heterocyclic thia-zine 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 asymmetric unit contains a disordered half-mol-ecule of solvent lying close to inversion centers. The crystal structure is stabilized by weak inter-molecular N-H⋯O and C-H⋯O inter-actions.

Entities:  

Year:  2010        PMID: 21522716      PMCID: PMC3050140          DOI: 10.1107/S1600536810052177

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


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

C21H21N5O4S·0.5C3H7NO M = 476.04 Orthorhombic, a = 18.3806 (5) Å b = 8.1155 (2) Å c = 30.4715 (5) Å V = 4545.37 (18) Å3 Z = 8 Mo Kα radiation μ = 0.19 mm−1 T = 173 K 0.16 × 0.14 × 0.06 mm

Data collection

Nonius KappaCCD diffractometer Absorption correction: multi-scan (SORTAV; Blessing, 1997 ▶) T min = 0.971, T max = 0.989 7438 measured reflections 3997 independent reflections 2747 reflections with I > 2σ(I) R int = 0.052

Refinement

R[F 2 > 2σ(F 2)] = 0.056 wR(F 2) = 0.125 S = 1.09 3997 reflections 328 parameters 35 restraints H-atom parameters constrained Δρmax = 0.21 e Å−3 Δρmin = −0.34 e Å−3 Data collection: COLLECT (Hooft, 1998 ▶); cell refinement: 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. Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536810052177/jh2242sup1.cif Structure factors: contains datablocks I. DOI: 10.1107/S1600536810052177/jh2242Isup2.hkl Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C21H21N5O4S·0.5C3H7NOF(000) = 2000
Mr = 476.04Dx = 1.391 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 5739 reflections
a = 18.3806 (5) Åθ = 1.0–27.5°
b = 8.1155 (2) ŵ = 0.19 mm1
c = 30.4715 (5) ÅT = 173 K
V = 4545.37 (18) Å3Plate, colorless
Z = 80.16 × 0.14 × 0.06 mm
Nonius KappaCCD diffractometer3997 independent reflections
Radiation source: fine-focus sealed tube2747 reflections with I > 2σ(I)
graphiteRint = 0.052
ω and φ scansθmax = 25.0°, θmin = 1.7°
Absorption correction: multi-scan (SORTAV; Blessing, 1997)h = −21→21
Tmin = 0.971, Tmax = 0.989k = −9→9
7438 measured reflectionsl = −36→36
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.056Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.125H-atom parameters constrained
S = 1.09w = 1/[σ2(Fo2) + (0.0337P)2 + 4.9015P] where P = (Fo2 + 2Fc2)/3
3997 reflections(Δ/σ)max < 0.001
328 parametersΔρmax = 0.21 e Å3
35 restraintsΔρmin = −0.34 e Å3
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.
xyzUiso*/UeqOcc. (<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)
O30.18352 (11)0.3040 (3)0.13232 (7)0.0337 (5)
O40.49365 (13)0.4478 (3)−0.07548 (7)0.0526 (7)
N1−0.04176 (13)0.3984 (3)0.24142 (7)0.0284 (6)
N20.05545 (13)0.6057 (3)0.15386 (8)0.0296 (6)
N30.10980 (13)0.5444 (3)0.17947 (8)0.0294 (6)
N40.25112 (15)0.5050 (3)0.10038 (8)0.0360 (6)
H4N0.26680.60720.10210.043*
N50.27351 (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)
H2−0.24750.50850.18750.038*
C3−0.22292 (18)0.6821 (4)0.14170 (10)0.0372 (8)
H3−0.27180.71000.13480.045*
C4−0.16594 (18)0.7623 (4)0.12073 (10)0.0382 (8)
H4−0.17610.84420.09930.046*
C5−0.09438 (17)0.7241 (4)0.13074 (9)0.0329 (8)
H5−0.05580.78200.11690.040*
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)
C80.01144 (16)0.4621 (4)0.21164 (9)0.0257 (7)
C9−0.04416 (17)0.4735 (4)0.28542 (9)0.0341 (8)
H9A0.00440.46900.29870.051*
H9B−0.07870.41280.30390.051*
H9C−0.05980.58850.28300.051*
C100.08623 (16)0.4549 (4)0.21424 (9)0.0283 (7)
C110.13593 (17)0.3754 (4)0.24619 (11)0.0394 (8)
H11A0.16970.30270.23060.059*
H11B0.10740.31070.26720.059*
H11C0.16350.46030.26190.059*
C120.18383 (16)0.5714 (4)0.16510 (10)0.0350 (8)
H12A0.21700.56340.19060.042*
H12B0.18830.68360.15260.042*
C130.20561 (16)0.4462 (4)0.13096 (9)0.0282 (7)
C140.31843 (18)0.4724 (4)0.03961 (10)0.0369 (8)
H140.33530.58070.04570.044*
C150.34450 (19)0.3878 (4)0.00032 (10)0.0374 (8)
C160.40459 (19)0.4517 (4)−0.02106 (10)0.0404 (9)
H160.42650.5499−0.01040.048*
C170.43339 (18)0.3744 (4)−0.05791 (10)0.0386 (8)
C180.4008 (2)0.2342 (5)−0.07389 (10)0.0452 (9)
H180.42000.1807−0.09910.054*
C190.3398 (2)0.1714 (5)−0.05311 (11)0.0507 (10)
H190.31710.0751−0.06450.061*
C200.3111 (2)0.2460 (5)−0.01617 (11)0.0467 (9)
H200.26930.2016−0.00220.056*
C210.5293 (2)0.3652 (6)−0.11094 (11)0.0629 (12)
H21A0.54490.2555−0.10130.094*
H21B0.57190.4291−0.12010.094*
H21C0.49560.3543−0.13570.094*
O50.1045 (7)0.3207 (11)0.0100 (4)0.161 (5)0.50
N60.0164 (11)0.498 (3)0.0059 (7)0.089 (5)0.50
C220.0794 (11)0.4396 (18)0.0258 (4)0.130 (5)0.50
H220.10060.49250.05050.156*0.50
C23−0.0119 (7)0.401 (2)−0.0349 (5)0.078 (3)0.50
H23A−0.05560.4548−0.04650.117*0.50
H23B−0.02380.2876−0.02630.117*0.50
H23C0.02590.3988−0.05760.117*0.50
C24−0.0275 (10)0.6312 (17)0.0173 (7)0.159 (8)0.50
H24A−0.06740.6410−0.00390.239*0.50
H24B0.00160.73240.01700.239*0.50
H24C−0.04740.61380.04670.239*0.50
U11U22U33U12U13U23
S10.0220 (4)0.0321 (4)0.0333 (4)−0.0047 (4)0.0012 (3)0.0040 (3)
O10.0275 (12)0.0564 (15)0.0402 (12)−0.0078 (12)0.0080 (10)0.0124 (11)
O20.0345 (13)0.0265 (12)0.0451 (13)−0.0030 (10)−0.0045 (10)−0.0017 (10)
O30.0305 (12)0.0252 (13)0.0455 (13)−0.0014 (10)0.0076 (10)−0.0047 (10)
O40.0473 (16)0.0686 (19)0.0421 (13)0.0044 (14)0.0185 (12)0.0017 (13)
N10.0229 (14)0.0368 (15)0.0256 (13)−0.0031 (12)0.0010 (10)0.0006 (11)
N20.0238 (15)0.0303 (15)0.0346 (14)−0.0017 (12)0.0051 (11)−0.0032 (12)
N30.0205 (14)0.0300 (15)0.0377 (14)−0.0013 (12)0.0052 (11)−0.0047 (12)
N40.0389 (16)0.0227 (14)0.0463 (15)−0.0037 (13)0.0149 (13)−0.0102 (12)
N50.0354 (17)0.0310 (16)0.0400 (15)0.0041 (13)0.0079 (12)−0.0083 (12)
C10.0223 (17)0.0307 (18)0.0249 (15)0.0032 (14)0.0007 (12)−0.0020 (13)
C20.0256 (18)0.0358 (19)0.0338 (17)0.0008 (15)0.0040 (13)−0.0047 (15)
C30.0298 (18)0.041 (2)0.0408 (19)0.0104 (16)−0.0015 (14)−0.0012 (16)
C40.042 (2)0.039 (2)0.0342 (18)0.0098 (17)0.0012 (15)0.0057 (15)
C50.0327 (19)0.0325 (19)0.0336 (17)0.0010 (16)0.0063 (14)0.0010 (14)
C60.0244 (17)0.0272 (17)0.0267 (16)0.0011 (14)0.0029 (12)−0.0050 (13)
C70.0222 (17)0.0253 (17)0.0289 (16)−0.0019 (14)0.0048 (12)−0.0049 (13)
C80.0225 (17)0.0266 (17)0.0279 (16)−0.0011 (14)0.0009 (12)−0.0007 (13)
C90.037 (2)0.0392 (19)0.0262 (16)0.0007 (16)0.0005 (14)0.0034 (14)
C100.0238 (17)0.0263 (17)0.0348 (17)−0.0010 (14)0.0018 (13)−0.0068 (14)
C110.0276 (18)0.042 (2)0.0482 (19)0.0034 (17)−0.0077 (14)−0.0043 (17)
C120.0200 (18)0.0377 (19)0.0474 (19)−0.0050 (15)0.0113 (14)−0.0116 (15)
C130.0201 (17)0.0284 (18)0.0362 (17)−0.0007 (14)0.0000 (13)−0.0033 (14)
C140.039 (2)0.0326 (19)0.0396 (19)0.0006 (17)0.0089 (15)−0.0040 (15)
C150.038 (2)0.037 (2)0.0371 (18)0.0060 (17)0.0049 (15)0.0006 (15)
C160.041 (2)0.040 (2)0.0399 (19)0.0023 (17)0.0062 (16)0.0011 (16)
C170.039 (2)0.045 (2)0.0317 (18)0.0109 (18)0.0045 (15)0.0038 (16)
C180.050 (2)0.055 (2)0.0301 (18)0.012 (2)−0.0006 (16)−0.0068 (17)
C190.056 (3)0.056 (3)0.040 (2)−0.004 (2)−0.0008 (18)−0.0129 (18)
C200.046 (2)0.054 (2)0.040 (2)−0.006 (2)0.0046 (16)−0.0066 (18)
C210.056 (3)0.094 (3)0.038 (2)0.013 (3)0.0173 (18)−0.002 (2)
O50.238 (13)0.067 (6)0.178 (10)−0.008 (7)−0.069 (9)0.021 (6)
N60.149 (15)0.046 (4)0.071 (10)−0.037 (9)0.058 (8)−0.009 (6)
C220.226 (16)0.069 (8)0.094 (9)−0.058 (9)−0.033 (8)0.025 (7)
C230.077 (9)0.067 (7)0.090 (8)0.001 (6)0.021 (6)0.011 (5)
C240.207 (19)0.052 (9)0.22 (2)−0.043 (9)0.168 (16)−0.024 (11)
S1—O11.432 (2)C10—C111.483 (4)
S1—O21.432 (2)C11—H11A0.9800
S1—N11.645 (2)C11—H11B0.9800
S1—C11.765 (3)C11—H11C0.9800
O3—C131.224 (4)C12—C131.508 (4)
O4—C171.367 (4)C12—H12A0.9900
O4—C211.431 (4)C12—H12B0.9900
N1—C81.431 (4)C14—C151.461 (4)
N1—C91.473 (4)C14—H140.9500
N2—C71.343 (4)C15—C161.383 (5)
N2—N31.362 (3)C15—C201.398 (5)
N3—C101.356 (4)C16—C171.391 (4)
N3—C121.446 (4)C16—H160.9500
N4—C131.340 (4)C17—C181.375 (5)
N4—N51.390 (3)C18—C191.386 (5)
N4—H4N0.8800C18—H180.9500
N5—C141.278 (4)C19—C201.382 (5)
C1—C21.389 (4)C19—H190.9500
C1—C61.399 (4)C20—H200.9500
C2—C31.383 (4)C21—H21A0.9800
C2—H20.9500C21—H21B0.9800
C3—C41.389 (5)C21—H21C0.9800
C3—H30.9500O5—C221.173 (18)
C4—C51.385 (4)N6—C221.39 (2)
C4—H40.9500N6—C241.39 (3)
C5—C61.397 (4)N6—C231.56 (3)
C5—H50.9500C22—H220.9500
C6—C71.455 (4)C23—H23A0.9800
C7—C81.405 (4)C23—H23B0.9800
C8—C101.378 (4)C23—H23C0.9800
C9—H9A0.9800C24—H24A0.9800
C9—H9B0.9800C24—H24B0.9800
C9—H9C0.9800C24—H24C0.9800
O1—S1—O2118.88 (14)H11B—C11—H11C109.5
O1—S1—N1107.87 (13)N3—C12—C13110.9 (3)
O2—S1—N1107.57 (13)N3—C12—H12A109.5
O1—S1—C1109.78 (14)C13—C12—H12A109.5
O2—S1—C1106.74 (13)N3—C12—H12B109.5
N1—S1—C1105.18 (13)C13—C12—H12B109.5
C17—O4—C21117.6 (3)H12A—C12—H12B108.0
C8—N1—C9116.6 (2)O3—C13—N4124.5 (3)
C8—N1—S1112.53 (18)O3—C13—C12121.6 (3)
C9—N1—S1118.9 (2)N4—C13—C12113.9 (3)
C7—N2—N3103.7 (2)N5—C14—C15121.6 (3)
C10—N3—N2114.1 (2)N5—C14—H14119.2
C10—N3—C12128.2 (3)C15—C14—H14119.2
N2—N3—C12117.5 (2)C16—C15—C20119.3 (3)
C13—N4—N5120.0 (3)C16—C15—C14118.2 (3)
C13—N4—H4N120.0C20—C15—C14122.5 (3)
N5—N4—H4N120.0C15—C16—C17121.0 (3)
C14—N5—N4114.3 (3)C15—C16—H16119.5
C2—C1—C6121.1 (3)C17—C16—H16119.5
C2—C1—S1119.5 (2)O4—C17—C18125.1 (3)
C6—C1—S1119.3 (2)O4—C17—C16115.3 (3)
C3—C2—C1119.4 (3)C18—C17—C16119.6 (3)
C3—C2—H2120.3C17—C18—C19119.7 (3)
C1—C2—H2120.3C17—C18—H18120.1
C2—C3—C4120.1 (3)C19—C18—H18120.1
C2—C3—H3119.9C20—C19—C18121.3 (4)
C4—C3—H3119.9C20—C19—H19119.4
C5—C4—C3120.6 (3)C18—C19—H19119.4
C5—C4—H4119.7C19—C20—C15119.1 (3)
C3—C4—H4119.7C19—C20—H20120.4
C4—C5—C6119.9 (3)C15—C20—H20120.4
C4—C5—H5120.1O4—C21—H21A109.5
C6—C5—H5120.1O4—C21—H21B109.5
C5—C6—C1118.9 (3)H21A—C21—H21B109.5
C5—C6—C7123.0 (3)O4—C21—H21C109.5
C1—C6—C7118.0 (3)H21A—C21—H21C109.5
N2—C7—C8110.7 (3)H21B—C21—H21C109.5
N2—C7—C6125.1 (3)C22—N6—C24130 (2)
C8—C7—C6124.1 (3)C22—N6—C23116.9 (19)
C10—C8—C7106.9 (3)C24—N6—C23113.4 (15)
C10—C8—N1129.0 (3)O5—C22—N6115.5 (16)
C7—C8—N1124.0 (3)O5—C22—H22122.3
N1—C9—H9A109.5N6—C22—H22122.3
N1—C9—H9B109.5N6—C23—H23A109.5
H9A—C9—H9B109.5N6—C23—H23B109.5
N1—C9—H9C109.5H23A—C23—H23B109.5
H9A—C9—H9C109.5N6—C23—H23C109.5
H9B—C9—H9C109.5H23A—C23—H23C109.5
N3—C10—C8104.5 (3)H23B—C23—H23C109.5
N3—C10—C11123.3 (3)N6—C24—H24A109.5
C8—C10—C11132.1 (3)N6—C24—H24B109.5
C10—C11—H11A109.5H24A—C24—H24B109.5
C10—C11—H11B109.5N6—C24—H24C109.5
H11A—C11—H11B109.5H24A—C24—H24C109.5
C10—C11—H11C109.5H24B—C24—H24C109.5
H11A—C11—H11C109.5
O1—S1—N1—C8−161.7 (2)C9—N1—C8—C1065.6 (4)
O2—S1—N1—C868.9 (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—C732.6 (4)
O2—S1—N1—C9−149.5 (2)N2—N3—C10—C8−1.6 (3)
C1—S1—N1—C997.0 (2)C12—N3—C10—C8−176.8 (3)
C7—N2—N3—C102.0 (3)N2—N3—C10—C11179.4 (3)
C7—N2—N3—C12177.7 (3)C12—N3—C10—C114.3 (5)
C13—N4—N5—C14−178.1 (3)C7—C8—C10—N30.5 (3)
O1—S1—C1—C2−33.0 (3)N1—C8—C10—N3−175.6 (3)
O2—S1—C1—C297.1 (2)C7—C8—C10—C11179.4 (3)
N1—S1—C1—C2−148.9 (2)N1—C8—C10—C113.2 (6)
O1—S1—C1—C6150.8 (2)C10—N3—C12—C1393.3 (4)
O2—S1—C1—C6−79.1 (3)N2—N3—C12—C13−81.7 (3)
N1—S1—C1—C634.9 (3)N5—N4—C13—O33.3 (5)
C6—C1—C2—C32.5 (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—N4145.9 (3)
C2—C3—C4—C5−0.6 (5)N4—N5—C14—C15−176.6 (3)
C3—C4—C5—C61.9 (5)N5—C14—C15—C16−165.5 (3)
C4—C5—C6—C1−1.0 (4)N5—C14—C15—C2014.5 (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—C17178.1 (3)
S1—C1—C6—C5174.9 (2)C21—O4—C17—C18−5.6 (5)
C2—C1—C6—C7176.1 (3)C21—O4—C17—C16174.5 (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—C181.4 (5)
N3—N2—C7—C6175.9 (3)O4—C17—C18—C19179.9 (3)
C5—C6—C7—N2−12.6 (5)C16—C17—C18—C19−0.1 (5)
C1—C6—C7—N2170.1 (3)C17—C18—C19—C20−0.6 (5)
C5—C6—C7—C8164.5 (3)C18—C19—C20—C150.2 (6)
C1—C6—C7—C8−12.7 (4)C16—C15—C20—C191.1 (5)
N2—C7—C8—C100.7 (3)C14—C15—C20—C19−178.9 (3)
C6—C7—C8—C10−176.8 (3)C24—N6—C22—O5178 (2)
N2—C7—C8—N1177.1 (3)C23—N6—C22—O5−1(2)
C6—C7—C8—N1−0.4 (5)
D—H···AD—HH···AD···AD—H···A
N4—H4N···O3i0.882.062.878 (3)155
C14—H14···O5i0.952.493.287 (10)142
C16—H16···O5i0.952.353.145 (11)140
C21—H21C···O2ii0.982.533.497 (5)169
C9—H9B···O10.982.482.836 (4)101
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯AD—HH⋯ADAD—H⋯A
N4—H4N⋯O3i0.882.062.878 (3)155
C14—H14⋯O5i0.952.493.287 (10)142
C16—H16⋯O5i0.952.353.145 (11)140
C21—H21C⋯O2ii0.982.533.497 (5)169

Symmetry codes: (i) ; (ii) .

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1.  A short history of SHELX.

Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  N-acetonylsaccharin.

Authors:  Matloob Ahmad; Hamid Latif Siddiqui; Muhammad Azam; Waseeq Ahmad Siddiqui; Masood Parvez
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2009-08-19

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Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2008-04-02

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Authors:  Waseeq Ahmad Siddiqui; Saeed Ahmad; Muhammad Ilyas Tariq; Hamid Latif Siddiqui; Masood Parvez
Journal:  Acta Crystallogr C       Date:  2007-12-14       Impact factor: 1.172

5.  N'-(2-Chloro-benzyl-idene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)acetohydrazide.

Authors:  Matloob Ahmad; Hamid Latif Siddiqui; Manzoor Iqbal Khattak; Saeed Ahmad; Masood Parvez
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-12-24
  5 in total
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1.  N'-(2-Chloro-benzyl-idene)-2-(3,4-dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)acetohydrazide.

Authors:  Matloob Ahmad; Hamid Latif Siddiqui; Manzoor Iqbal Khattak; Saeed Ahmad; Masood Parvez
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2010-12-24

2.  2-(3,4-Dimethyl-5,5-dioxo-2H,4H-pyrazolo-[4,3-c][1,2]benzothia-zin-2-yl)-N-(3-meth-oxy-benz-yl)acetamide.

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Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2012-10-03
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