organic compounds
E)-2-benzylidene-4-[(3-phenyl-4,5-dihydroisoxazol-5-yl)methyl]-2H-benzo[b][1,4]thiazin-3(4H)-one
of (aLaboratoire de Chimie Organique Hétérocyclique URAC 21, Pôle de Compétence Pharmacochimie, Av. Ibn Battouta, BP 1014, Faculté des Sciences, Université Mohammed V, Rabat, Morocco, bMoroccan Foundation for Advanced Science, Innovation and Research (MASCIR), Rabat Design Center, Rue Mohamed Al Jazouli, Madinat El Irfane, 10100 Rabat, Morocco, and cLaboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V, Avenue Ibn Battouta, BP 1014, Rabat, Morocco
*Correspondence e-mail: em_essassi@yahoo.fr
In the title compound, C25H20N2O2S, the dihydroisoxazole ring exhibits an with the methine atom being the flap, while the 1,4-thiazine ring displays a screw-boat conformation. The six-membered ring fused to the 1,4-thiazine ring makes dihedral angles of 63.04 (2) and 54.7 (2)° with the mean planes through the five-membered heterocycle and the attached phenyl ring, respectively. The phenyl group connected to the 1,4-thiazine ring is disordered over two sites [major component = 0.57 (2)]. The most prominent interactions in the are C—H⋯O hydrogen bonds that link molecules, forming inversion dimers, and C—H⋯N hydrogen bonds that link the dimers into columns parallel to the b axis.
CCDC reference: 1402017
1. Related literature
For the biological activity and pharmaceutical properties of benzothiazines and their derivatives, see: Fringuelli et al. (1998); Rathore & Kumar (2006); Barazarte et al. (2008); Bakavoli et al. (2007). For related structures, see: Saeed et al. (2010); Afrakssou et al. (2011); Sebbar et al. (2014a,b).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996) and ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009) and publCIF (Westrip, 2010).
Supporting information
CCDC reference: 1402017
10.1107/S2056989015009755/tk5368sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S2056989015009755/tk5368Isup2.hkl
Supporting information file. DOI: 10.1107/S2056989015009755/tk5368Isup3.cml
To a solution of (E)-4-allyl-2-benzylidene-3,4-dihydro-2H- benzo[b]1,4-thiazine (1 g, 3.4 mmol) and benzaldoxime (0.81 ml, 6.8 mmol) in chloroform (30 ml) was added dropwise a 24% sodium hypochlorite solution (10 ml) at 273 K. Stirring was continued for 4 h. The organic layer was dried over Na2SO4 and the solvent was evaporated under reduced pressure. The residue was then purified by
on silica gel using a mixture of hexane/ethyl acetate (v/v = 80/20) as Colourless crystals were isolated when the solvent was allowed to evaporate (yield: 74%).The H atoms were located in a difference map and treated as riding with C—H = 0.93–0.98 Å, and with Uiso(H) = 1.2 Ueq. The phenyl group connected to the 1,4-thiazine ring is disordered over two sites [major component = 0.57 (2)].
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEPIII (Burnett & Johnson, 1996) and ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009) and publCIF (Westrip, 2010).C25H20N2O2S | F(000) = 864 |
Mr = 412.49 | Dx = 1.355 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
a = 17.4463 (16) Å | Cell parameters from 4149 reflections |
b = 5.3024 (4) Å | θ = 1.7–26.4° |
c = 22.778 (2) Å | µ = 0.19 mm−1 |
β = 106.370 (5)° | T = 296 K |
V = 2021.7 (3) Å3 | Block, colourless |
Z = 4 | 0.36 × 0.31 × 0.26 mm |
Bruker X8 APEX diffractometer | 4149 independent reflections |
Radiation source: fine-focus sealed tube | 1980 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.095 |
ϕ and ω scans | θmax = 26.4°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −21→21 |
Tmin = 0.504, Tmax = 0.748 | k = −6→6 |
27864 measured reflections | l = −28→25 |
Refinement on F2 | 0 restraints |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.057 | H-atom parameters constrained |
wR(F2) = 0.145 | w = 1/[σ2(Fo2) + (0.0437P)2 + 0.9738P] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max = 0.008 |
4149 reflections | Δρmax = 0.48 e Å−3 |
321 parameters | Δρmin = −0.26 e Å−3 |
C25H20N2O2S | V = 2021.7 (3) Å3 |
Mr = 412.49 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 17.4463 (16) Å | µ = 0.19 mm−1 |
b = 5.3024 (4) Å | T = 296 K |
c = 22.778 (2) Å | 0.36 × 0.31 × 0.26 mm |
β = 106.370 (5)° |
Bruker X8 APEX diffractometer | 4149 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 1980 reflections with I > 2σ(I) |
Tmin = 0.504, Tmax = 0.748 | Rint = 0.095 |
27864 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 0 restraints |
wR(F2) = 0.145 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.48 e Å−3 |
4149 reflections | Δρmin = −0.26 e Å−3 |
321 parameters |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
C1 | 0.17593 (18) | 0.5680 (6) | 0.36708 (14) | 0.0498 (8) | |
C2 | 0.1174 (2) | 0.6377 (7) | 0.31368 (19) | 0.0693 (11) | |
H2 | 0.0834 | 0.7719 | 0.3146 | 0.083* | |
C3 | 0.1096 (2) | 0.5102 (9) | 0.25999 (18) | 0.0784 (12) | |
H3 | 0.0717 | 0.5614 | 0.2244 | 0.094* | |
C4 | 0.1577 (2) | 0.3074 (8) | 0.25874 (16) | 0.0707 (11) | |
H4 | 0.1512 | 0.2177 | 0.2226 | 0.085* | |
C5 | 0.21579 (19) | 0.2357 (6) | 0.31078 (14) | 0.0543 (9) | |
H5 | 0.2479 | 0.0968 | 0.3096 | 0.065* | |
C6 | 0.22670 (17) | 0.3703 (5) | 0.36516 (14) | 0.0418 (7) | |
C7 | 0.28231 (19) | 0.3227 (6) | 0.47719 (16) | 0.0529 (8) | |
C8 | 0.21687 (19) | 0.4767 (6) | 0.48721 (15) | 0.0542 (9) | |
C9 | 0.1957 (2) | 0.4326 (7) | 0.53875 (16) | 0.0659 (10) | |
H9 | 0.2239 | 0.3061 | 0.5641 | 0.079* | |
C10A | 0.1328 (11) | 0.561 (4) | 0.5602 (8) | 0.051 (3) | 0.57 (2) |
C11A | 0.1042 (10) | 0.781 (3) | 0.5504 (5) | 0.084 (3) | 0.57 (2) |
H11A | 0.1229 | 0.8915 | 0.5258 | 0.101* | 0.57 (2) |
C12A | 0.0437 (9) | 0.861 (3) | 0.5768 (6) | 0.099 (4) | 0.57 (2) |
H12A | 0.0224 | 1.0218 | 0.5680 | 0.118* | 0.57 (2) |
C13A | 0.0161 (10) | 0.713 (5) | 0.6139 (12) | 0.082 (6) | 0.57 (2) |
H13A | −0.0329 | 0.7447 | 0.6210 | 0.098* | 0.57 (2) |
C14A | 0.0602 (15) | 0.521 (5) | 0.6399 (13) | 0.094 (6) | 0.57 (2) |
H14A | 0.0499 | 0.4360 | 0.6726 | 0.113* | 0.57 (2) |
C15A | 0.1232 (12) | 0.447 (3) | 0.6169 (9) | 0.090 (5) | 0.57 (2) |
H15A | 0.1593 | 0.3255 | 0.6374 | 0.108* | 0.57 (2) |
C10B | 0.1358 (18) | 0.506 (5) | 0.5683 (14) | 0.060 (8)* | 0.43 (2) |
C11B | 0.0671 (10) | 0.674 (4) | 0.5314 (8) | 0.075 (5) | 0.43 (2) |
H11B | 0.0663 | 0.7241 | 0.4920 | 0.090* | 0.43 (2) |
C12B | 0.0078 (11) | 0.752 (4) | 0.5551 (8) | 0.077 (5) | 0.43 (2) |
H12B | −0.0347 | 0.8505 | 0.5328 | 0.092* | 0.43 (2) |
C13B | 0.0151 (18) | 0.671 (8) | 0.6186 (18) | 0.108 (14) | 0.43 (2) |
H13B | −0.0142 | 0.7420 | 0.6428 | 0.129* | 0.43 (2) |
C14B | 0.068 (3) | 0.483 (9) | 0.6378 (19) | 0.17 (2) | 0.43 (2) |
H14B | 0.0702 | 0.4082 | 0.6751 | 0.206* | 0.43 (2) |
C15B | 0.1193 (14) | 0.393 (7) | 0.6073 (16) | 0.142 (14) | 0.43 (2) |
H15B | 0.1421 | 0.2345 | 0.6179 | 0.171* | 0.43 (2) |
C16 | 0.36034 (17) | 0.1736 (5) | 0.41243 (13) | 0.0474 (8) | |
H16A | 0.3559 | 0.1496 | 0.3694 | 0.057* | |
H16B | 0.3637 | 0.0085 | 0.4313 | 0.057* | |
C17 | 0.43583 (17) | 0.3205 (5) | 0.44203 (14) | 0.0460 (8) | |
H17 | 0.4441 | 0.3324 | 0.4863 | 0.055* | |
C18 | 0.50908 (17) | 0.2106 (5) | 0.42840 (14) | 0.0468 (8) | |
H18A | 0.5548 | 0.2102 | 0.4645 | 0.056* | |
H18B | 0.4994 | 0.0405 | 0.4124 | 0.056* | |
C19 | 0.52051 (17) | 0.3901 (5) | 0.38119 (13) | 0.0419 (7) | |
C20 | 0.57826 (18) | 0.3586 (5) | 0.34590 (14) | 0.0464 (8) | |
C21 | 0.6339 (2) | 0.1683 (7) | 0.35988 (16) | 0.0677 (10) | |
H21 | 0.6341 | 0.0567 | 0.3914 | 0.081* | |
C22 | 0.6896 (2) | 0.1410 (8) | 0.3275 (2) | 0.0860 (13) | |
H22 | 0.7278 | 0.0140 | 0.3380 | 0.103* | |
C23 | 0.6888 (3) | 0.2994 (8) | 0.2803 (2) | 0.0869 (13) | |
H23 | 0.7264 | 0.2807 | 0.2587 | 0.104* | |
C24 | 0.6332 (3) | 0.4842 (8) | 0.26472 (19) | 0.0900 (13) | |
H24 | 0.6323 | 0.5905 | 0.2321 | 0.108* | |
C25 | 0.5777 (2) | 0.5156 (7) | 0.29715 (18) | 0.0725 (11) | |
H25 | 0.5398 | 0.6431 | 0.2862 | 0.087* | |
N1 | 0.28861 (14) | 0.3038 (4) | 0.41850 (11) | 0.0447 (6) | |
N2 | 0.47581 (16) | 0.5856 (4) | 0.37434 (12) | 0.0526 (7) | |
O1 | 0.33070 (14) | 0.2170 (5) | 0.51952 (10) | 0.0720 (7) | |
O2 | 0.42730 (13) | 0.5703 (3) | 0.41480 (10) | 0.0562 (6) | |
S1 | 0.18110 (6) | 0.72501 (16) | 0.43621 (5) | 0.0680 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0428 (19) | 0.0534 (19) | 0.053 (2) | −0.0024 (16) | 0.0122 (17) | 0.0073 (16) |
C2 | 0.053 (2) | 0.078 (2) | 0.074 (3) | 0.011 (2) | 0.013 (2) | 0.031 (2) |
C3 | 0.058 (3) | 0.117 (3) | 0.049 (3) | 0.000 (2) | −0.002 (2) | 0.031 (2) |
C4 | 0.060 (2) | 0.098 (3) | 0.047 (2) | −0.008 (2) | 0.0034 (19) | 0.003 (2) |
C5 | 0.048 (2) | 0.062 (2) | 0.047 (2) | −0.0018 (16) | 0.0042 (17) | −0.0010 (18) |
C6 | 0.0375 (18) | 0.0419 (16) | 0.044 (2) | −0.0032 (14) | 0.0086 (15) | 0.0042 (15) |
C7 | 0.043 (2) | 0.059 (2) | 0.055 (2) | −0.0010 (17) | 0.0116 (18) | 0.0007 (18) |
C8 | 0.050 (2) | 0.063 (2) | 0.046 (2) | −0.0028 (17) | 0.0077 (17) | −0.0047 (17) |
C9 | 0.056 (2) | 0.084 (3) | 0.054 (2) | 0.007 (2) | 0.0101 (19) | −0.002 (2) |
C10A | 0.056 (7) | 0.063 (10) | 0.035 (7) | 0.004 (6) | 0.016 (5) | 0.006 (6) |
C11A | 0.085 (9) | 0.094 (8) | 0.081 (7) | −0.015 (7) | 0.036 (6) | −0.027 (6) |
C12A | 0.087 (9) | 0.114 (8) | 0.095 (8) | 0.000 (7) | 0.025 (7) | −0.043 (7) |
C13A | 0.060 (9) | 0.122 (14) | 0.081 (13) | 0.024 (9) | 0.049 (9) | 0.004 (9) |
C14A | 0.091 (11) | 0.102 (9) | 0.120 (17) | 0.033 (8) | 0.080 (11) | 0.033 (9) |
C15A | 0.142 (14) | 0.096 (7) | 0.059 (9) | 0.057 (7) | 0.072 (9) | 0.032 (6) |
C11B | 0.055 (9) | 0.105 (11) | 0.067 (8) | 0.009 (8) | 0.021 (7) | 0.001 (8) |
C12B | 0.061 (9) | 0.105 (11) | 0.070 (10) | 0.024 (8) | 0.027 (7) | 0.010 (8) |
C13B | 0.12 (2) | 0.123 (19) | 0.08 (2) | −0.070 (18) | 0.028 (15) | −0.035 (17) |
C14B | 0.19 (3) | 0.26 (4) | 0.08 (2) | 0.07 (2) | 0.07 (2) | 0.03 (2) |
C15B | 0.058 (12) | 0.28 (4) | 0.096 (17) | 0.007 (15) | 0.035 (10) | −0.01 (2) |
C16 | 0.047 (2) | 0.0446 (17) | 0.046 (2) | 0.0058 (15) | 0.0060 (16) | −0.0037 (15) |
C17 | 0.0451 (19) | 0.0443 (17) | 0.0435 (19) | 0.0034 (15) | 0.0042 (15) | −0.0010 (15) |
C18 | 0.0439 (19) | 0.0441 (17) | 0.048 (2) | 0.0064 (15) | 0.0052 (15) | −0.0003 (15) |
C19 | 0.0416 (18) | 0.0341 (15) | 0.0426 (19) | −0.0021 (14) | −0.0003 (15) | −0.0037 (14) |
C20 | 0.0431 (19) | 0.0451 (17) | 0.047 (2) | −0.0032 (15) | 0.0053 (16) | −0.0015 (16) |
C21 | 0.072 (3) | 0.070 (2) | 0.066 (3) | 0.019 (2) | 0.028 (2) | 0.0122 (19) |
C22 | 0.082 (3) | 0.091 (3) | 0.095 (3) | 0.030 (2) | 0.042 (3) | 0.013 (3) |
C23 | 0.084 (3) | 0.097 (3) | 0.095 (3) | 0.007 (3) | 0.050 (3) | 0.004 (3) |
C24 | 0.097 (3) | 0.096 (3) | 0.089 (3) | 0.005 (3) | 0.046 (3) | 0.027 (3) |
C25 | 0.069 (3) | 0.067 (2) | 0.084 (3) | 0.010 (2) | 0.024 (2) | 0.019 (2) |
N1 | 0.0421 (15) | 0.0516 (15) | 0.0388 (16) | 0.0008 (12) | 0.0085 (13) | −0.0021 (12) |
N2 | 0.0543 (17) | 0.0399 (14) | 0.0595 (19) | 0.0019 (13) | 0.0095 (15) | −0.0023 (13) |
O1 | 0.0622 (16) | 0.1030 (19) | 0.0471 (15) | 0.0177 (14) | 0.0093 (13) | 0.0139 (14) |
O2 | 0.0586 (14) | 0.0385 (12) | 0.0724 (16) | 0.0094 (11) | 0.0200 (13) | −0.0006 (11) |
S1 | 0.0727 (7) | 0.0573 (5) | 0.0770 (7) | 0.0094 (5) | 0.0258 (5) | −0.0015 (5) |
C1—C6 | 1.381 (4) | C11B—C12B | 1.360 (15) |
C1—C2 | 1.400 (4) | C11B—H11B | 0.9300 |
C1—S1 | 1.761 (3) | C12B—C13B | 1.48 (5) |
C2—C3 | 1.370 (5) | C12B—H12B | 0.9300 |
C2—H2 | 0.9300 | C13B—C14B | 1.35 (7) |
C3—C4 | 1.369 (5) | C13B—H13B | 0.9300 |
C3—H3 | 0.9300 | C14B—C15B | 1.36 (5) |
C4—C5 | 1.378 (4) | C14B—H14B | 0.9300 |
C4—H4 | 0.9300 | C15B—H15B | 0.9300 |
C5—C6 | 1.395 (4) | C16—N1 | 1.469 (3) |
C5—H5 | 0.9300 | C16—C17 | 1.515 (4) |
C6—N1 | 1.424 (3) | C16—H16A | 0.9700 |
C7—O1 | 1.224 (4) | C16—H16B | 0.9700 |
C7—N1 | 1.376 (4) | C17—O2 | 1.453 (3) |
C7—C8 | 1.473 (4) | C17—C18 | 1.514 (4) |
C8—C9 | 1.347 (4) | C17—H17 | 0.9800 |
C8—S1 | 1.750 (3) | C18—C19 | 1.491 (4) |
C9—C10B | 1.45 (3) | C18—H18A | 0.9700 |
C9—C10A | 1.49 (2) | C18—H18B | 0.9700 |
C9—H9 | 0.9300 | C19—N2 | 1.280 (3) |
C10A—C11A | 1.26 (2) | C19—C20 | 1.465 (4) |
C10A—C15A | 1.48 (2) | C20—C21 | 1.373 (4) |
C11A—C12A | 1.418 (14) | C20—C25 | 1.386 (4) |
C11A—H11A | 0.9300 | C21—C22 | 1.384 (5) |
C12A—C13A | 1.34 (3) | C21—H21 | 0.9300 |
C12A—H12A | 0.9300 | C22—C23 | 1.361 (5) |
C13A—C14A | 1.31 (5) | C22—H22 | 0.9300 |
C13A—H13A | 0.9300 | C23—C24 | 1.354 (5) |
C14A—C15A | 1.40 (3) | C23—H23 | 0.9300 |
C14A—H14A | 0.9300 | C24—C25 | 1.383 (5) |
C15A—H15A | 0.9300 | C24—H24 | 0.9300 |
C10B—C15B | 1.17 (4) | C25—H25 | 0.9300 |
C10B—C11B | 1.54 (3) | N2—O2 | 1.418 (3) |
C6—C1—C2 | 119.4 (3) | C14B—C13B—C12B | 113 (3) |
C6—C1—S1 | 121.0 (2) | C14B—C13B—H13B | 123.4 |
C2—C1—S1 | 119.5 (3) | C12B—C13B—H13B | 123.4 |
C3—C2—C1 | 120.6 (4) | C13B—C14B—C15B | 126 (4) |
C3—C2—H2 | 119.7 | C13B—C14B—H14B | 117.1 |
C1—C2—H2 | 119.7 | C15B—C14B—H14B | 117.1 |
C4—C3—C2 | 119.9 (3) | C10B—C15B—C14B | 123 (4) |
C4—C3—H3 | 120.0 | C10B—C15B—H15B | 118.6 |
C2—C3—H3 | 120.0 | C14B—C15B—H15B | 118.6 |
C3—C4—C5 | 120.3 (4) | N1—C16—C17 | 111.9 (2) |
C3—C4—H4 | 119.8 | N1—C16—H16A | 109.2 |
C5—C4—H4 | 119.8 | C17—C16—H16A | 109.2 |
C4—C5—C6 | 120.4 (3) | N1—C16—H16B | 109.2 |
C4—C5—H5 | 119.8 | C17—C16—H16B | 109.2 |
C6—C5—H5 | 119.8 | H16A—C16—H16B | 107.9 |
C1—C6—C5 | 119.2 (3) | O2—C17—C18 | 104.7 (2) |
C1—C6—N1 | 120.0 (3) | O2—C17—C16 | 107.9 (2) |
C5—C6—N1 | 120.8 (3) | C18—C17—C16 | 112.9 (2) |
O1—C7—N1 | 120.4 (3) | O2—C17—H17 | 110.4 |
O1—C7—C8 | 121.6 (3) | C18—C17—H17 | 110.4 |
N1—C7—C8 | 118.0 (3) | C16—C17—H17 | 110.4 |
C9—C8—C7 | 117.0 (3) | C19—C18—C17 | 101.2 (2) |
C9—C8—S1 | 125.1 (3) | C19—C18—H18A | 111.5 |
C7—C8—S1 | 117.5 (3) | C17—C18—H18A | 111.5 |
C8—C9—C10B | 140.4 (11) | C19—C18—H18B | 111.5 |
C8—C9—C10A | 128.0 (7) | C17—C18—H18B | 111.5 |
C8—C9—H9 | 116.0 | H18A—C18—H18B | 109.3 |
C10A—C9—H9 | 116.0 | N2—C19—C20 | 121.0 (3) |
C11A—C10A—C15A | 113.4 (15) | N2—C19—C18 | 113.8 (3) |
C11A—C10A—C9 | 131.0 (14) | C20—C19—C18 | 125.1 (3) |
C15A—C10A—C9 | 112.0 (14) | C21—C20—C25 | 118.2 (3) |
C10A—C11A—C12A | 120.2 (12) | C21—C20—C19 | 120.4 (3) |
C10A—C11A—H11A | 119.9 | C25—C20—C19 | 121.4 (3) |
C12A—C11A—H11A | 119.9 | C20—C21—C22 | 120.7 (3) |
C13A—C12A—C11A | 122.4 (13) | C20—C21—H21 | 119.7 |
C13A—C12A—H12A | 118.8 | C22—C21—H21 | 119.7 |
C11A—C12A—H12A | 118.8 | C23—C22—C21 | 120.2 (4) |
C14A—C13A—C12A | 118.2 (14) | C23—C22—H22 | 119.9 |
C14A—C13A—H13A | 120.9 | C21—C22—H22 | 119.9 |
C12A—C13A—H13A | 120.9 | C24—C23—C22 | 120.1 (4) |
C13A—C14A—C15A | 118 (2) | C24—C23—H23 | 120.0 |
C13A—C14A—H14A | 121.0 | C22—C23—H23 | 120.0 |
C15A—C14A—H14A | 121.0 | C23—C24—C25 | 120.3 (4) |
C14A—C15A—C10A | 120.5 (17) | C23—C24—H24 | 119.9 |
C14A—C15A—H15A | 119.8 | C25—C24—H24 | 119.9 |
C10A—C15A—H15A | 119.8 | C24—C25—C20 | 120.5 (4) |
C15B—C10B—C9 | 125 (3) | C24—C25—H25 | 119.7 |
C15B—C10B—C11B | 113 (3) | C20—C25—H25 | 119.7 |
C9—C10B—C11B | 117 (2) | C7—N1—C6 | 124.2 (3) |
C12B—C11B—C10B | 121.4 (16) | C7—N1—C16 | 115.4 (2) |
C12B—C11B—H11B | 119.3 | C6—N1—C16 | 119.8 (2) |
C10B—C11B—H11B | 119.3 | C19—N2—O2 | 109.2 (2) |
C11B—C12B—C13B | 115.7 (17) | N2—O2—C17 | 108.8 (2) |
C11B—C12B—H12B | 122.1 | C8—S1—C1 | 99.02 (15) |
C13B—C12B—H12B | 122.1 |
D—H···A | D—H | H···A | D···A | D—H···A |
C21—H21···O1i | 0.93 | 2.43 | 3.339 (4) | 166 |
C18—H18B···N2ii | 0.97 | 2.56 | 3.526 (3) | 178 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) x, y−1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C21—H21···O1i | 0.93 | 2.43 | 3.339 (4) | 166.1 |
C18—H18B···N2ii | 0.97 | 2.56 | 3.526 (3) | 178 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) x, y−1, z. |
Acknowledgements
The authors thank the Unit of Support for Technical and Scientific Research (UATRS, CNRST) for the X-ray measurements and the University Mohammed V, Rabat, Morocco, for financial support.
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Recently, a number of pharmacological tests revealed that 2H-1,4- benzothiazine derivatives present various biological activities including antifungal (Fringuelli et al., 1998), antimicrobial (Rathore et al., 2006), antimalarial (Barazarte et al., 2008) and 15-lipoxygenase inhibition properties (Bakavoli et al., 2007). In this work, we aim to prepare new derivatives of 3,4-dihydro-2H- benzo[b]1,4-thiazine for biological evaluation, as in the previous studies (Saeed et al., 2010; Afrakssou et al., 2011; Sebbar et al., 2014a, 2014b. In the reaction, the oxime reacts with (E)-4-allyl-2-benzylidene-2H-benzo[b][1,4]thiazin-3(4H)-one in a biphasic medium (water-chloroform) at 0°C over 4 h to give a unique cycloadduct: (E)-2-benzylidene-4-((3-phenyl-4, 5-dihydroisoxazol-5-yl)methyl)-2H- benzo[b][1,4]thiazin-3(4H)-one (Scheme 1).
The molecule of the title compound is build up from two fused six-membered rings linked, via two –CH2– groups, on the one hand to a phenyl ring and on the other hand to the 3-phenyl-4,5-dihydroisoxazole system as shown in Fig. 1. The (C1 to C6) benzene cycle form dihedral angles of 63.04 (2)\ and 54.7 (2)° with the mean planes through the five-membered heterocycle and the attached phenyl ring, respectively. In the crystal, the molecules are linked by hydrogen bond (Table 1) in the way to build a dimers as shown in Fig. 2.