organic compounds
3-(6-Benzyloxy-2,2-dimethylperhydrofuro[2,3-d][1,3]dioxolan-5-yl)-5-(4-chlorophenyl)-4-nitro-2-phenyl-2,3,4,5-tetrahydroisoxazole
aDepartment of Physics, The New College (Autonomous), Chennai 600 014, India, bOrganic Chemistry Division, Central Leather Research Institute, Chennai 600 020, India, and cDepartment of Physics, Presidency College (Autonomous), Chennai 600 005, India
*Correspondence e-mail: a_spandian@yahoo.com
In the title compound, C29H29ClN2O7, the isoxazole and dioxolane rings adopt envelope conformations, and the furan ring adopts a twisted conformation. The is stabilized by intermolecular C—H⋯π interactions between a benzyloxy methylene H atom and the 4-chlorophenyl ring of an adjacent molecule, and by weak non-classical intermolecular C—H⋯O hydrogen bonds. In addition, the exhibits a Cl⋯O halogen bond of 3.111 (3) Å, with a nearly linear C—Cl⋯O angle of 160.7 (1)°.
Related literature
For general background to 1,3-dipolar cycloaddition reactions, see: Gothelf & Jorgensen (1998); Bernotas et al. (1996); Breuer (1982); Colombi et al. (1978); Hossain et al. (1993). For ring puckering parameters, see: Cremer & Pople (1975); Nardelli (1983). For halogen bonds, see: Politzer et al. (2007).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2004); cell APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536809034096/lx2103sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809034096/lx2103Isup2.hkl
A mixture of D-glucose derived nitrone (0.5 mmol) and β-nitrostyrene (0.5 mmol) was refluxed in dry toluene (10 ml) until completion of the reaction as evidenced by TLC analysis. The solvent was evaporated under reduced pressure. The crude was purified by on silica gel (Merck, 100-200 mesh, ethylacetate-petroleum ether (10 : 90) to afford pure isoxazolidine. Single crystals of the title compound suitable for X-ray diffraction was recrystallized from ethanol.
All H atoms were positioned geometrically, with C–H = 0.93-0.98 Å and constrained to ride on their parent atoms, with Uiso(H) = xUeq(C, N), where x = 1.5 for methyl H and x = 1.2 for all H atoms.
Data collection: APEX2 (Bruker, 2004); cell
APEX2 and SAINT (Bruker, 2004); data reduction: SAINT and XPREP (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).C29H29ClN2O7 | F(000) = 1160 |
Mr = 552.99 | Dx = 1.312 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 3652 reflections |
a = 12.7862 (5) Å | θ = 2.5–25° |
b = 13.0160 (5) Å | µ = 0.19 mm−1 |
c = 16.8232 (6) Å | T = 293 K |
V = 2799.80 (18) Å3 | Needle, colourless |
Z = 4 | 0.3 × 0.2 × 0.2 mm |
Bruker Kappa APEXII CCD diffractometer | 4764 independent reflections |
Radiation source: fine-focus sealed tube | 3446 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.034 |
ω and ϕ scans | θmax = 25.0°, θmin = 2.9° |
Absorption correction: multi-scan (SADABS; Bruker 2004) | h = −15→15 |
Tmin = 0.926, Tmax = 0.964 | k = −13→14 |
17056 measured reflections | l = −16→20 |
Refinement on F2 | Hydrogen site location: difference Fourier map |
Least-squares matrix: full | H-atom parameters constrained |
R[F2 > 2σ(F2)] = 0.037 | w = 1/[σ2(Fo2) + (0.0403P)2 + 0.2549P] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.088 | (Δ/σ)max < 0.001 |
S = 1.02 | Δρmax = 0.15 e Å−3 |
4764 reflections | Δρmin = −0.14 e Å−3 |
355 parameters | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
1 restraint | Extinction coefficient: 0.0045 (6) |
Primary atom site location: structure-invariant direct methods | Absolute structure: Flack (1983), 1975 Friedel pairs |
Secondary atom site location: difference Fourier map | Absolute structure parameter: −0.05 (8) |
C29H29ClN2O7 | V = 2799.80 (18) Å3 |
Mr = 552.99 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 12.7862 (5) Å | µ = 0.19 mm−1 |
b = 13.0160 (5) Å | T = 293 K |
c = 16.8232 (6) Å | 0.3 × 0.2 × 0.2 mm |
Bruker Kappa APEXII CCD diffractometer | 4764 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker 2004) | 3446 reflections with I > 2σ(I) |
Tmin = 0.926, Tmax = 0.964 | Rint = 0.034 |
17056 measured reflections |
R[F2 > 2σ(F2)] = 0.037 | H-atom parameters constrained |
wR(F2) = 0.088 | Δρmax = 0.15 e Å−3 |
S = 1.02 | Δρmin = −0.14 e Å−3 |
4764 reflections | Absolute structure: Flack (1983), 1975 Friedel pairs |
355 parameters | Absolute structure parameter: −0.05 (8) |
1 restraint |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | ||
C1 | 0.33984 (19) | 0.6866 (2) | 0.65294 (16) | 0.0602 (7) | |
H1 | 0.3415 | 0.6459 | 0.6983 | 0.072* | |
C2 | 0.2814 (2) | 0.7761 (2) | 0.65257 (18) | 0.0692 (7) | |
H2 | 0.2457 | 0.7964 | 0.6981 | 0.083* | |
C3 | 0.2765 (2) | 0.8340 (2) | 0.5857 (2) | 0.0673 (7) | |
C4 | 0.3326 (2) | 0.8082 (2) | 0.5200 (2) | 0.0760 (9) | |
H4 | 0.3301 | 0.8493 | 0.4749 | 0.091* | |
C5 | 0.3933 (2) | 0.7205 (2) | 0.52082 (18) | 0.0691 (8) | |
H5 | 0.4332 | 0.7039 | 0.4764 | 0.083* | |
C6 | 0.39575 (17) | 0.65738 (18) | 0.58632 (15) | 0.0471 (6) | |
C7 | 0.45334 (17) | 0.55719 (17) | 0.58177 (14) | 0.0455 (6) | |
H7 | 0.5181 | 0.5658 | 0.5513 | 0.055* | |
C8 | 0.38927 (17) | 0.46762 (17) | 0.54776 (13) | 0.0427 (6) | |
H8 | 0.3143 | 0.4808 | 0.5544 | 0.051* | |
C9 | 0.42248 (17) | 0.37460 (18) | 0.59803 (14) | 0.0434 (6) | |
H9 | 0.4536 | 0.3214 | 0.5643 | 0.052* | |
C10 | 0.33056 (15) | 0.33112 (18) | 0.64465 (14) | 0.0434 (6) | |
H10 | 0.3092 | 0.3802 | 0.6857 | 0.052* | |
C11 | 0.34793 (16) | 0.22621 (18) | 0.68184 (14) | 0.0448 (6) | |
H11 | 0.3831 | 0.2310 | 0.7335 | 0.054* | |
C12 | 0.23650 (18) | 0.18767 (19) | 0.68975 (14) | 0.0474 (6) | |
H12 | 0.2314 | 0.1126 | 0.6886 | 0.057* | |
C13 | 0.17952 (16) | 0.23875 (19) | 0.62140 (14) | 0.0460 (6) | |
H13 | 0.1606 | 0.1884 | 0.5805 | 0.055* | |
C14 | 0.08681 (19) | 0.2635 (2) | 0.73843 (15) | 0.0582 (7) | |
C15 | 0.0626 (3) | 0.3618 (3) | 0.7812 (2) | 0.1063 (12) | |
H15A | 0.1132 | 0.4131 | 0.7668 | 0.159* | |
H15B | 0.0653 | 0.3503 | 0.8375 | 0.159* | |
H15C | −0.0060 | 0.3849 | 0.7666 | 0.159* | |
C16 | 0.0104 (2) | 0.1788 (3) | 0.7552 (2) | 0.0866 (10) | |
H16A | −0.0575 | 0.1981 | 0.7359 | 0.130* | |
H16B | 0.0069 | 0.1669 | 0.8114 | 0.130* | |
H16C | 0.0328 | 0.1171 | 0.7289 | 0.130* | |
C17 | 0.4468 (2) | 0.0741 (2) | 0.66159 (16) | 0.0585 (7) | |
H17A | 0.3903 | 0.0319 | 0.6819 | 0.070* | |
H17B | 0.4917 | 0.0925 | 0.7058 | 0.070* | |
C18 | 0.50869 (17) | 0.01390 (19) | 0.60141 (15) | 0.0493 (6) | |
C19 | 0.5602 (2) | −0.0733 (2) | 0.62669 (19) | 0.0713 (8) | |
H19 | 0.5570 | −0.0928 | 0.6798 | 0.086* | |
C20 | 0.6160 (2) | −0.1312 (3) | 0.5736 (2) | 0.0875 (10) | |
H20 | 0.6507 | −0.1899 | 0.5910 | 0.105* | |
C21 | 0.6215 (2) | −0.1038 (3) | 0.4954 (2) | 0.0811 (9) | |
H21 | 0.6591 | −0.1439 | 0.4597 | 0.097* | |
C22 | 0.5717 (2) | −0.0176 (2) | 0.46998 (17) | 0.0713 (8) | |
H22 | 0.5757 | 0.0018 | 0.4169 | 0.086* | |
C23 | 0.5151 (2) | 0.0412 (2) | 0.52292 (16) | 0.0608 (7) | |
H23 | 0.4809 | 0.1000 | 0.5052 | 0.073* | |
C24 | 0.60915 (17) | 0.3964 (2) | 0.63870 (14) | 0.0489 (6) | |
C25 | 0.63995 (19) | 0.2974 (2) | 0.62056 (17) | 0.0639 (8) | |
H25 | 0.5905 | 0.2457 | 0.6140 | 0.077* | |
C26 | 0.7453 (2) | 0.2761 (3) | 0.61224 (17) | 0.0790 (9) | |
H26 | 0.7663 | 0.2100 | 0.5988 | 0.095* | |
C27 | 0.8194 (2) | 0.3512 (3) | 0.62345 (18) | 0.0847 (11) | |
H27 | 0.8901 | 0.3359 | 0.6187 | 0.102* | |
C28 | 0.7876 (2) | 0.4485 (3) | 0.64162 (19) | 0.0805 (10) | |
H28 | 0.8373 | 0.4999 | 0.6485 | 0.097* | |
C29 | 0.68311 (17) | 0.4720 (2) | 0.64995 (16) | 0.0618 (7) | |
H29 | 0.6626 | 0.5384 | 0.6631 | 0.074* | |
N1 | 0.50029 (14) | 0.41439 (15) | 0.65469 (12) | 0.0476 (5) | |
N2 | 0.4148 (2) | 0.45251 (17) | 0.46170 (13) | 0.0574 (6) | |
O1 | 0.47679 (12) | 0.52172 (12) | 0.66073 (9) | 0.0517 (4) | |
O2 | 0.4993 (2) | 0.4215 (2) | 0.44423 (13) | 0.0993 (8) | |
O3 | 0.3483 (2) | 0.4733 (2) | 0.41370 (13) | 0.1086 (8) | |
O4 | 0.24623 (11) | 0.31531 (12) | 0.59000 (9) | 0.0503 (4) | |
O5 | 0.19043 (12) | 0.23172 (14) | 0.75864 (9) | 0.0588 (5) | |
O6 | 0.08979 (12) | 0.28308 (14) | 0.65527 (10) | 0.0613 (5) | |
O7 | 0.40491 (11) | 0.16447 (12) | 0.62710 (9) | 0.0478 (4) | |
Cl1 | 0.19572 (8) | 0.94167 (6) | 0.58228 (7) | 0.1059 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0647 (16) | 0.0588 (18) | 0.0572 (16) | 0.0114 (14) | −0.0014 (14) | −0.0080 (14) |
C2 | 0.0688 (17) | 0.070 (2) | 0.0692 (16) | 0.0167 (16) | −0.0049 (15) | −0.0232 (13) |
C3 | 0.0706 (18) | 0.0432 (17) | 0.0883 (19) | 0.0018 (14) | −0.0139 (17) | −0.0167 (13) |
C4 | 0.099 (2) | 0.0429 (18) | 0.086 (2) | −0.0020 (17) | −0.0028 (19) | 0.0106 (16) |
C5 | 0.088 (2) | 0.0506 (18) | 0.0687 (19) | −0.0036 (16) | 0.0181 (16) | −0.0007 (15) |
C6 | 0.0449 (13) | 0.0404 (15) | 0.0559 (15) | −0.0077 (11) | 0.0023 (12) | −0.0126 (13) |
C7 | 0.0447 (13) | 0.0421 (15) | 0.0497 (15) | −0.0055 (11) | 0.0041 (11) | −0.0071 (12) |
C8 | 0.0416 (12) | 0.0425 (14) | 0.0439 (14) | −0.0004 (11) | 0.0024 (10) | −0.0035 (11) |
C9 | 0.0385 (12) | 0.0433 (15) | 0.0485 (14) | 0.0025 (10) | −0.0014 (11) | −0.0027 (12) |
C10 | 0.0388 (12) | 0.0432 (15) | 0.0482 (14) | 0.0006 (11) | −0.0034 (10) | −0.0004 (11) |
C11 | 0.0452 (13) | 0.0443 (15) | 0.0450 (13) | 0.0031 (11) | −0.0028 (11) | 0.0019 (12) |
C12 | 0.0530 (14) | 0.0414 (15) | 0.0479 (14) | 0.0007 (12) | 0.0052 (11) | 0.0001 (12) |
C13 | 0.0439 (12) | 0.0471 (15) | 0.0471 (13) | −0.0059 (12) | 0.0000 (10) | −0.0003 (12) |
C14 | 0.0540 (15) | 0.0662 (19) | 0.0544 (16) | 0.0074 (14) | 0.0049 (13) | −0.0018 (14) |
C15 | 0.120 (3) | 0.101 (3) | 0.099 (3) | 0.031 (2) | 0.007 (2) | −0.033 (2) |
C16 | 0.0640 (18) | 0.104 (3) | 0.091 (2) | −0.0119 (19) | 0.0126 (16) | 0.026 (2) |
C17 | 0.0702 (17) | 0.0496 (17) | 0.0556 (16) | 0.0215 (14) | −0.0020 (13) | 0.0105 (13) |
C18 | 0.0447 (13) | 0.0441 (16) | 0.0592 (17) | 0.0053 (12) | 0.0004 (11) | 0.0064 (13) |
C19 | 0.0730 (18) | 0.065 (2) | 0.076 (2) | 0.0201 (17) | 0.0068 (15) | 0.0156 (16) |
C20 | 0.078 (2) | 0.069 (2) | 0.115 (3) | 0.0330 (17) | 0.018 (2) | 0.013 (2) |
C21 | 0.0659 (19) | 0.065 (2) | 0.112 (3) | 0.0099 (17) | 0.0286 (18) | −0.014 (2) |
C22 | 0.0799 (19) | 0.069 (2) | 0.0653 (19) | −0.0030 (18) | 0.0187 (16) | −0.0046 (16) |
C23 | 0.0703 (17) | 0.0506 (17) | 0.0615 (18) | 0.0124 (14) | 0.0001 (14) | 0.0040 (14) |
C24 | 0.0386 (13) | 0.0631 (19) | 0.0451 (15) | 0.0009 (13) | −0.0026 (11) | 0.0005 (12) |
C25 | 0.0474 (14) | 0.070 (2) | 0.0742 (18) | 0.0103 (14) | −0.0031 (13) | −0.0081 (15) |
C26 | 0.0579 (17) | 0.100 (3) | 0.080 (2) | 0.0289 (19) | 0.0031 (15) | −0.0037 (19) |
C27 | 0.0411 (16) | 0.138 (3) | 0.075 (2) | 0.015 (2) | 0.0063 (14) | 0.023 (2) |
C28 | 0.0423 (15) | 0.117 (3) | 0.082 (2) | −0.0142 (18) | −0.0024 (14) | 0.024 (2) |
C29 | 0.0479 (14) | 0.0722 (19) | 0.0652 (17) | −0.0065 (14) | −0.0031 (12) | 0.0012 (15) |
N1 | 0.0396 (11) | 0.0478 (13) | 0.0553 (12) | 0.0014 (9) | −0.0010 (9) | −0.0058 (10) |
N2 | 0.0776 (15) | 0.0449 (13) | 0.0497 (14) | −0.0107 (12) | −0.0008 (13) | −0.0059 (11) |
O1 | 0.0526 (9) | 0.0512 (11) | 0.0513 (11) | 0.0034 (8) | −0.0048 (7) | −0.0116 (9) |
O2 | 0.1055 (18) | 0.123 (2) | 0.0690 (14) | 0.0167 (16) | 0.0285 (13) | −0.0203 (13) |
O3 | 0.136 (2) | 0.125 (2) | 0.0645 (14) | 0.0038 (17) | −0.0251 (14) | 0.0137 (14) |
O4 | 0.0404 (8) | 0.0540 (11) | 0.0565 (10) | −0.0071 (8) | −0.0082 (7) | 0.0133 (8) |
O5 | 0.0541 (10) | 0.0757 (13) | 0.0465 (10) | 0.0024 (9) | 0.0008 (8) | 0.0010 (9) |
O6 | 0.0485 (10) | 0.0762 (13) | 0.0591 (11) | 0.0070 (9) | 0.0053 (8) | 0.0097 (10) |
O7 | 0.0547 (9) | 0.0422 (10) | 0.0467 (9) | 0.0116 (8) | −0.0005 (7) | 0.0056 (8) |
Cl1 | 0.1104 (7) | 0.0618 (5) | 0.1454 (9) | 0.0290 (5) | −0.0323 (6) | −0.0224 (6) |
C1—C6 | 1.383 (3) | C15—H15A | 0.9600 |
C1—C2 | 1.383 (4) | C15—H15B | 0.9600 |
C1—H1 | 0.9300 | C15—H15C | 0.9600 |
C2—C3 | 1.355 (4) | C16—H16A | 0.9600 |
C2—H2 | 0.9300 | C16—H16B | 0.9600 |
C3—C4 | 1.360 (4) | C16—H16C | 0.9600 |
C3—Cl1 | 1.742 (3) | C17—O7 | 1.417 (3) |
C4—C5 | 1.380 (4) | C17—C18 | 1.505 (3) |
C4—H4 | 0.9300 | C17—H17A | 0.9700 |
C5—C6 | 1.375 (4) | C17—H17B | 0.9700 |
C5—H5 | 0.9300 | C18—C23 | 1.370 (3) |
C6—C7 | 1.500 (3) | C18—C19 | 1.380 (3) |
C7—O1 | 1.438 (3) | C19—C20 | 1.369 (4) |
C7—C8 | 1.535 (3) | C19—H19 | 0.9300 |
C7—H7 | 0.9800 | C20—C21 | 1.364 (5) |
C8—N2 | 1.497 (3) | C20—H20 | 0.9300 |
C8—C9 | 1.537 (3) | C21—C22 | 1.360 (4) |
C8—H8 | 0.9800 | C21—H21 | 0.9300 |
C9—N1 | 1.472 (3) | C22—C23 | 1.380 (4) |
C9—C10 | 1.522 (3) | C22—H22 | 0.9300 |
C9—H9 | 0.9800 | C23—H23 | 0.9300 |
C10—O4 | 1.432 (3) | C24—C29 | 1.378 (3) |
C10—C11 | 1.518 (3) | C24—C25 | 1.382 (4) |
C10—H10 | 0.9800 | C24—N1 | 1.437 (3) |
C11—O7 | 1.423 (3) | C25—C26 | 1.382 (4) |
C11—C12 | 1.516 (3) | C25—H25 | 0.9300 |
C11—H11 | 0.9800 | C26—C27 | 1.374 (4) |
C12—O5 | 1.421 (3) | C26—H26 | 0.9300 |
C12—C13 | 1.515 (3) | C27—C28 | 1.366 (5) |
C12—H12 | 0.9800 | C27—H27 | 0.9300 |
C13—O6 | 1.405 (3) | C28—C29 | 1.377 (4) |
C13—O4 | 1.414 (3) | C28—H28 | 0.9300 |
C13—H13 | 0.9800 | C29—H29 | 0.9300 |
C14—O6 | 1.423 (3) | N1—O1 | 1.433 (2) |
C14—O5 | 1.429 (3) | N2—O2 | 1.191 (3) |
C14—C15 | 1.500 (4) | N2—O3 | 1.203 (3) |
C14—C16 | 1.500 (4) | Cl1—O2i | 3.111 (3) |
C6—C1—C2 | 120.5 (3) | C14—C15—H15A | 109.5 |
C6—C1—H1 | 119.8 | C14—C15—H15B | 109.5 |
C2—C1—H1 | 119.8 | H15A—C15—H15B | 109.5 |
C3—C2—C1 | 119.8 (3) | C14—C15—H15C | 109.5 |
C3—C2—H2 | 120.1 | H15A—C15—H15C | 109.5 |
C1—C2—H2 | 120.1 | H15B—C15—H15C | 109.5 |
C2—C3—C4 | 120.8 (3) | C14—C16—H16A | 109.5 |
C2—C3—Cl1 | 120.2 (2) | C14—C16—H16B | 109.5 |
C4—C3—Cl1 | 119.0 (3) | H16A—C16—H16B | 109.5 |
C3—C4—C5 | 119.6 (3) | C14—C16—H16C | 109.5 |
C3—C4—H4 | 120.2 | H16A—C16—H16C | 109.5 |
C5—C4—H4 | 120.2 | H16B—C16—H16C | 109.5 |
C6—C5—C4 | 121.0 (3) | O7—C17—C18 | 110.8 (2) |
C6—C5—H5 | 119.5 | O7—C17—H17A | 109.5 |
C4—C5—H5 | 119.5 | C18—C17—H17A | 109.5 |
C5—C6—C1 | 118.3 (2) | O7—C17—H17B | 109.5 |
C5—C6—C7 | 119.3 (2) | C18—C17—H17B | 109.5 |
C1—C6—C7 | 122.3 (2) | H17A—C17—H17B | 108.1 |
O1—C7—C6 | 109.53 (18) | C23—C18—C19 | 118.9 (2) |
O1—C7—C8 | 102.22 (18) | C23—C18—C17 | 123.0 (2) |
C6—C7—C8 | 114.67 (18) | C19—C18—C17 | 118.2 (2) |
O1—C7—H7 | 110.0 | C20—C19—C18 | 120.0 (3) |
C6—C7—H7 | 110.0 | C20—C19—H19 | 120.0 |
C8—C7—H7 | 110.0 | C18—C19—H19 | 120.0 |
N2—C8—C7 | 110.11 (18) | C21—C20—C19 | 120.8 (3) |
N2—C8—C9 | 111.63 (19) | C21—C20—H20 | 119.6 |
C7—C8—C9 | 104.23 (17) | C19—C20—H20 | 119.6 |
N2—C8—H8 | 110.2 | C22—C21—C20 | 119.7 (3) |
C7—C8—H8 | 110.2 | C22—C21—H21 | 120.2 |
C9—C8—H8 | 110.2 | C20—C21—H21 | 120.2 |
N1—C9—C10 | 108.61 (18) | C21—C22—C23 | 120.0 (3) |
N1—C9—C8 | 105.42 (17) | C21—C22—H22 | 120.0 |
C10—C9—C8 | 111.29 (18) | C23—C22—H22 | 120.0 |
N1—C9—H9 | 110.5 | C18—C23—C22 | 120.6 (3) |
C10—C9—H9 | 110.5 | C18—C23—H23 | 119.7 |
C8—C9—H9 | 110.5 | C22—C23—H23 | 119.7 |
O4—C10—C11 | 104.21 (17) | C29—C24—C25 | 120.1 (2) |
O4—C10—C9 | 107.70 (18) | C29—C24—N1 | 121.5 (2) |
C11—C10—C9 | 115.70 (18) | C25—C24—N1 | 118.0 (2) |
O4—C10—H10 | 109.7 | C24—C25—C26 | 119.1 (3) |
C11—C10—H10 | 109.7 | C24—C25—H25 | 120.4 |
C9—C10—H10 | 109.7 | C26—C25—H25 | 120.4 |
O7—C11—C12 | 110.55 (18) | C27—C26—C25 | 121.1 (3) |
O7—C11—C10 | 108.43 (18) | C27—C26—H26 | 119.5 |
C12—C11—C10 | 101.32 (17) | C25—C26—H26 | 119.5 |
O7—C11—H11 | 112.0 | C28—C27—C26 | 119.0 (3) |
C12—C11—H11 | 112.0 | C28—C27—H27 | 120.5 |
C10—C11—H11 | 112.0 | C26—C27—H27 | 120.5 |
O5—C12—C13 | 104.04 (18) | C27—C28—C29 | 121.2 (3) |
O5—C12—C11 | 109.12 (19) | C27—C28—H28 | 119.4 |
C13—C12—C11 | 103.89 (18) | C29—C28—H28 | 119.4 |
O5—C12—H12 | 113.0 | C28—C29—C24 | 119.5 (3) |
C13—C12—H12 | 113.0 | C28—C29—H29 | 120.2 |
C11—C12—H12 | 113.0 | C24—C29—H29 | 120.2 |
O6—C13—O4 | 110.77 (19) | O1—N1—C24 | 112.06 (18) |
O6—C13—C12 | 105.37 (18) | O1—N1—C9 | 104.32 (16) |
O4—C13—C12 | 107.62 (17) | C24—N1—C9 | 118.42 (18) |
O6—C13—H13 | 111.0 | O2—N2—O3 | 123.5 (3) |
O4—C13—H13 | 111.0 | O2—N2—C8 | 118.8 (2) |
C12—C13—H13 | 111.0 | O3—N2—C8 | 117.8 (2) |
O6—C14—O5 | 105.13 (18) | N1—O1—C7 | 106.94 (16) |
O6—C14—C15 | 108.9 (2) | C13—O4—C10 | 108.40 (16) |
O5—C14—C15 | 108.9 (2) | C12—O5—C14 | 107.88 (17) |
O6—C14—C16 | 109.5 (2) | C13—O6—C14 | 110.31 (18) |
O5—C14—C16 | 110.3 (2) | C17—O7—C11 | 113.41 (18) |
C15—C14—C16 | 113.8 (3) | C3—Cl1—O2i | 160.74 (11) |
C6—C1—C2—C3 | 1.9 (4) | C17—C18—C23—C22 | −179.1 (3) |
C1—C2—C3—C4 | −3.4 (4) | C21—C22—C23—C18 | 0.3 (4) |
C1—C2—C3—Cl1 | 175.3 (2) | C29—C24—C25—C26 | −1.4 (4) |
C2—C3—C4—C5 | 1.6 (4) | N1—C24—C25—C26 | −174.0 (2) |
Cl1—C3—C4—C5 | −177.2 (2) | C24—C25—C26—C27 | 1.5 (4) |
C3—C4—C5—C6 | 1.8 (4) | C25—C26—C27—C28 | −1.2 (5) |
C4—C5—C6—C1 | −3.2 (4) | C26—C27—C28—C29 | 1.0 (5) |
C4—C5—C6—C7 | 173.4 (2) | C27—C28—C29—C24 | −0.9 (4) |
C2—C1—C6—C5 | 1.4 (4) | C25—C24—C29—C28 | 1.1 (4) |
C2—C1—C6—C7 | −175.1 (2) | N1—C24—C29—C28 | 173.5 (2) |
C5—C6—C7—O1 | 160.2 (2) | C29—C24—N1—O1 | 16.3 (3) |
C1—C6—C7—O1 | −23.3 (3) | C25—C24—N1—O1 | −171.2 (2) |
C5—C6—C7—C8 | −85.6 (3) | C29—C24—N1—C9 | 137.8 (2) |
C1—C6—C7—C8 | 90.9 (3) | C25—C24—N1—C9 | −49.7 (3) |
O1—C7—C8—N2 | −143.01 (19) | C10—C9—N1—O1 | −95.32 (19) |
C6—C7—C8—N2 | 98.6 (2) | C8—C9—N1—O1 | 24.0 (2) |
O1—C7—C8—C9 | −23.2 (2) | C10—C9—N1—C24 | 139.3 (2) |
C6—C7—C8—C9 | −141.6 (2) | C8—C9—N1—C24 | −101.3 (2) |
N2—C8—C9—N1 | 118.5 (2) | C7—C8—N2—O2 | 68.6 (3) |
C7—C8—C9—N1 | −0.3 (2) | C9—C8—N2—O2 | −46.6 (3) |
N2—C8—C9—C10 | −124.0 (2) | C7—C8—N2—O3 | −110.8 (2) |
C7—C8—C9—C10 | 117.22 (19) | C9—C8—N2—O3 | 133.9 (2) |
N1—C9—C10—O4 | 166.62 (17) | C24—N1—O1—C7 | 88.2 (2) |
C8—C9—C10—O4 | 51.0 (2) | C9—N1—O1—C7 | −41.12 (19) |
N1—C9—C10—C11 | −77.3 (2) | C6—C7—O1—N1 | 161.96 (16) |
C8—C9—C10—C11 | 167.08 (18) | C8—C7—O1—N1 | 39.96 (19) |
O4—C10—C11—O7 | 78.2 (2) | O6—C13—O4—C10 | 101.9 (2) |
C9—C10—C11—O7 | −39.9 (2) | C12—C13—O4—C10 | −12.8 (2) |
O4—C10—C11—C12 | −38.2 (2) | C11—C10—O4—C13 | 32.4 (2) |
C9—C10—C11—C12 | −156.24 (19) | C9—C10—O4—C13 | 155.77 (18) |
O7—C11—C12—O5 | 164.63 (18) | C13—C12—O5—C14 | 26.3 (2) |
C10—C11—C12—O5 | −80.6 (2) | C11—C12—O5—C14 | 136.67 (19) |
O7—C11—C12—C13 | −84.9 (2) | O6—C14—O5—C12 | −26.7 (3) |
C10—C11—C12—C13 | 29.9 (2) | C15—C14—O5—C12 | −143.2 (2) |
O5—C12—C13—O6 | −15.9 (2) | C16—C14—O5—C12 | 91.3 (2) |
C11—C12—C13—O6 | −130.13 (19) | O4—C13—O6—C14 | −116.2 (2) |
O5—C12—C13—O4 | 102.3 (2) | C12—C13—O6—C14 | −0.1 (3) |
C11—C12—C13—O4 | −11.9 (2) | O5—C14—O6—C13 | 16.1 (3) |
O7—C17—C18—C23 | −4.6 (3) | C15—C14—O6—C13 | 132.6 (2) |
O7—C17—C18—C19 | 176.1 (2) | C16—C14—O6—C13 | −102.4 (2) |
C23—C18—C19—C20 | −0.3 (4) | C18—C17—O7—C11 | −178.33 (18) |
C17—C18—C19—C20 | 179.0 (3) | C12—C11—O7—C17 | −83.7 (2) |
C18—C19—C20—C21 | −0.1 (5) | C10—C11—O7—C17 | 166.09 (18) |
C19—C20—C21—C22 | 0.6 (5) | C2—C3—Cl1—O2i | −90.1 (5) |
C20—C21—C22—C23 | −0.7 (5) | C4—C3—Cl1—O2i | 88.7 (5) |
C19—C18—C23—C22 | 0.2 (4) |
Symmetry code: (i) x−1/2, −y+3/2, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O2ii | 0.98 | 2.54 | 3.298 (3) | 134 |
C17—H17B···O1iii | 0.97 | 2.46 | 3.218 (3) | 135 |
C21—H21···Cg1ii | 0.93 | 2.75 | 3.598 (1) | 152 |
Symmetry codes: (ii) x−1/2, −y+1/2, −z+1; (iii) −x+1, y−1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C29H29ClN2O7 |
Mr | 552.99 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 293 |
a, b, c (Å) | 12.7862 (5), 13.0160 (5), 16.8232 (6) |
V (Å3) | 2799.80 (18) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.19 |
Crystal size (mm) | 0.3 × 0.2 × 0.2 |
Data collection | |
Diffractometer | Bruker Kappa APEXII CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker 2004) |
Tmin, Tmax | 0.926, 0.964 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17056, 4764, 3446 |
Rint | 0.034 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.037, 0.088, 1.02 |
No. of reflections | 4764 |
No. of parameters | 355 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.15, −0.14 |
Absolute structure | Flack (1983), 1975 Friedel pairs |
Absolute structure parameter | −0.05 (8) |
Computer programs: APEX2 (Bruker, 2004), APEX2 and SAINT (Bruker, 2004), SAINT and XPREP (Bruker, 2004), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C13—H13···O2i | 0.98 | 2.54 | 3.298 (3) | 133.7 |
C17—H17B···O1ii | 0.97 | 2.46 | 3.218 (3) | 134.8 |
C21—H21···Cg1i | 0.93 | 2.75 | 3.598 (1) | 152.0 |
Symmetry codes: (i) x−1/2, −y+1/2, −z+1; (ii) −x+1, y−1/2, −z+3/2. |
Acknowledgements
MNM and ASP thank Dr J. Jothi Kumar, Principal of Presidency College (Autonomous), Chennai, India, for providing the computer and internet facilities. The authors thank Dr Babu Vargheese, SAIF, IIT, Madras, India, for his help with the X-ray data collection.
References
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The 1,3-dipolar cycloaddition of nitrones with olefinic dipolarophiles proceeds through a concerted mechanism yielding highly substituted isoxazolidines (Gothelf & Jorgensen, 1998). The cornerstone for cycloaddition reactions, nitrones, are excellent spin traping (Bernotas et al., 1996) and highly versatile synthetic intermediates (Breuer, 1982). Highly substituted spiro-isoxazolidines result from the 1,3-dipolar cycloaddition of exocylic olefins with nitrones and these spiro-isoxazolidines have also been transformed into complex heterocycles (Colombi et al., 1978, Hossain et al., 1993). Here we report the crystal structure of the title compound (Fig. 1).
The dihedral angle between the phenyl rings C1-C6 and C18-C23, C18-C23 and C24-C29, and, C1-C6 and C24-C29 are 8.4 (2), 83.9 (1) and 75.7 (1)°, respectively. The five membered tetrahydrofuran ring (C10-C13/O4) adopts a twisted conformation and the other five membered rings, isoxazole ring (C7-C9/O1/N1) and the dioxolan ring (C12-C14/O5/O6), adopt envelope conformations on C11 and C10, O1 and O5 with a pseudo-twofold axis passing through C12–C11, C9–C8 and C13–O6 bonds. The puckering parameters (Cremer & Pople, 1975) and the lowest displacement asymmetry parameters (Nardelli, 1983)as follows: for the tetrahydrofuran ring q2 = 0.365 (1) Å, ϕ = 304.9 (1)°, ΔS (C10) is 12.8 (1)° and Δ2 (C13) is 1.8 (1)°, for the isoxazolidine ring q2 = 0.377 (1) Å, ϕ = 359.7 (1)°, ΔS (O1) is 1.0 (1)° and Δ2(C8) is 19.6 (1)° and for the dioxolone ring q2 = 0.248 (1) Å, ϕ = 181.2 (1)°, ΔS (O5) is 0.3 (1)° and Δ2 (C13) is 13.3 (1)°.
The molecular packing is stabilized by weak non-classical intermolecular C–H···O hydrogen bonds (Table 1 and Fig. 2; symmetry code as in Fig. 2). Additionally, the crystal structure exhibits a Cl···O halogen bond (Politzer et al., 2007) between the chlorine atom and the oxygen of a neighbouring NO2 group, with a Cl1···O2iv distance of 3.111 (3) Å (symmetry code as in Fig. 2). The molecular packing (Fig. 3) is further stabilized by an intermolecular C–H···π interactions between the methylene H atom of benzyloxy substituent and the 4-chlorophenyl ring of an adjacent molecule, with a C21–H21···Cg1iii separation of 2.75 Å (Table 1, Cg1 is the centroid of C1-C6 benzene ring).