




Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536809044675/lh2930sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536809044675/lh2930Isup2.hkl |
CCDC reference: 754479
Key indicators
- Single-crystal X-ray study
- T = 100 K
- Mean
(C-C) = 0.002 Å
- R factor = 0.040
- wR factor = 0.099
- Data-to-parameter ratio = 16.9
checkCIF/PLATON results
No syntax errors found
Alert level C SHFSU01_ALERT_2_C Test not performed. _refine_ls_shift/su_max and _refine_ls_shift/esd_max not present. Absolute value of the parameter shift to su ratio given 0.001 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 19
Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 34.04 From the CIF: _reflns_number_total 4621 Count of symmetry unique reflns 4640 Completeness (_total/calc) 99.59% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no PLAT791_ALERT_4_G The Model has Chirality at C11 (Verify) .... S PLAT791_ALERT_4_G The Model has Chirality at C14 (Verify) .... S
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 2 ALERT level C = Check and explain 3 ALERT level G = General alerts; check 0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 1 ALERT type 2 Indicator that the structure model may be wrong or deficient 0 ALERT type 3 Indicator that the structure quality may be low 4 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
935 mg (4.25 mmol) of the hydroximoyl chloride at 273 K was dissolved in 100 ml of diethyl ether and 650 mg (2.84 mmol) of N-protected-5-methylene-pyrrolidine-2,4-dione was added. To this mixture 9.35 ml (0.5 M, 4.675 mmol) of triethylamine solution in ether was added dropwise at a rate of 8 to 10 drops/min over 4h and stirred overnight. The mixture was then quenched by addition of 100ml HCl (2 N) and partitioned against ether (4 x 60 ml). The combined organic phases were washed with NaHCO3 (100 ml) and water (2 x 100 ml), then dried with MgSO4, and concentrated in vacuo (15 mbar) to give a yellow oil. Crystallization from diethyl ether gave the analytically and spectroscopically pure spiroisoxazoline (880 mg, 75 %) as colourless crystals. M.p. 403–404 K.
All H atoms were placed in the calculated positions, with C–H = 0.93–0.98 Å, and refined using a riding model, with Uiso(H) = 1.2 or 1.5 Ueq(C). A rotating-group model was applied for the methyl groups. In the absence of significant anomalous dispersion, 3651 Friedel pairs were merged for the final refinement.
Natural products containing pyrrolidinone carbon skeletons continue to attract the interest of chemists and biologists due to their challenging structures and remarkable biological properties (Iida et al., 1986; Matkhalikova et al., 1969; Reddy & Rao, 2006; Reiner, 2007; Royles, 1996). Amongst these, polychlorinated pyrrolidinone i.e. dysidamide analogues extracted from the marine sponge, Lamellodysidea herbacea, display remarkable biological activities (Sauleau & Bourguet-Kondracki, 2005). We have synthesized the title compound, which may act as an essential intermediate in the synthesis of dysidamide and its crystal structure is reported herein.
The molecular structure of the title compound is shown in Fig. 1. The 4,5-dihydroisoxazole ring (O3/N2/C11–C13) adopts an envelope conformation with atom C11 displaced from the mean plane by 0.045 (1) Å; the puckering parameters (Cremer & Pople, 1975) are Q = 0.0730 (13) Å and Θ = 330.2 (11)° whereas the conformation of dioxolane ring (O4/O5/C14–C16) is twisted, as reflected by the puckering parameters, Q = 0.3405 (13) Å and Θ = 82.9 (2)°, with torsion angle C16–O5–C15–C14 being -36.76 (12) °. The molecular structure is stabilized by an intramolecular C1—H1A···O1 hydrogen bond which generates an S(7) ring motif (Bernstein et al., 1995). Bond lengths and angles are within normal ranges, and comparable to a closely related structure (Bathich et al., 2009).
In the solid state (Fig. 2), the molecules are linked via intermolecular C14—H14A···O1i hydrogen bonds to form one-dimensional chains along the b-axis and are further consolidated by C–H···π (Table 1) interactions.
For general background to and applications of pyrrolidinone derivatives, see: Iida et al. (1986); Matkhalikova et al. (1969); Reddy & Rao (2006); Reiner (2007); Royles (1996); Sauleau & Bourguet-Kondracki (2005). For a related structure, see: Bathich et al. (2009). For a description of hydrogen-bond motifs, see: Bernstein et al. (1995). For the definition of ring conformations, see: Cremer & Pople (1975). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986). Cg1 is the centroid of C1–C6 ring.
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
C23H28N2O5 | F(000) = 880 |
Mr = 412.47 | Dx = 1.346 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 9915 reflections |
a = 9.8666 (2) Å | θ = 2.1–33.4° |
b = 11.1565 (3) Å | µ = 0.10 mm−1 |
c = 18.4884 (4) Å | T = 100 K |
V = 2035.14 (8) Å3 | Block, colourless |
Z = 4 | 0.49 × 0.23 × 0.16 mm |
Bruker SMART APEXII CCD area-detector diffractometer | 4621 independent reflections |
Radiation source: fine-focus sealed tube | 4013 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.034 |
φ and ω scans | θmax = 34.0°, θmin = 2.1° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −12→15 |
Tmin = 0.931, Tmax = 0.985 | k = −17→16 |
26273 measured reflections | l = −29→27 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.053P)2 + 0.1506P] where P = (Fo2 + 2Fc2)/3 |
4621 reflections | (Δ/σ)max < 0.001 |
273 parameters | Δρmax = 0.27 e Å−3 |
0 restraints | Δρmin = −0.26 e Å−3 |
C23H28N2O5 | V = 2035.14 (8) Å3 |
Mr = 412.47 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 9.8666 (2) Å | µ = 0.10 mm−1 |
b = 11.1565 (3) Å | T = 100 K |
c = 18.4884 (4) Å | 0.49 × 0.23 × 0.16 mm |
Bruker SMART APEXII CCD area-detector diffractometer | 4621 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 4013 reflections with I > 2σ(I) |
Tmin = 0.931, Tmax = 0.985 | Rint = 0.034 |
26273 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.27 e Å−3 |
4621 reflections | Δρmin = −0.26 e Å−3 |
273 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cyrosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | ||
O1 | −0.23832 (10) | 0.26330 (9) | 0.40562 (6) | 0.0196 (2) | |
O2 | 0.22502 (11) | 0.36138 (13) | 0.40410 (7) | 0.0325 (3) | |
O3 | 0.05398 (10) | 0.52460 (9) | 0.31291 (5) | 0.0187 (2) | |
O4 | 0.14033 (10) | 0.38771 (9) | 0.09244 (5) | 0.0196 (2) | |
O5 | 0.36514 (10) | 0.35805 (9) | 0.06709 (5) | 0.01736 (19) | |
N1 | −0.09667 (11) | 0.35996 (10) | 0.32684 (6) | 0.0143 (2) | |
N2 | 0.11326 (13) | 0.55491 (11) | 0.24486 (6) | 0.0186 (2) | |
C1 | −0.41547 (14) | 0.44109 (13) | 0.31359 (8) | 0.0190 (3) | |
H1A | −0.4219 | 0.3748 | 0.3439 | 0.023* | |
C2 | −0.51858 (15) | 0.52627 (15) | 0.31315 (8) | 0.0227 (3) | |
H2A | −0.5929 | 0.5173 | 0.3436 | 0.027* | |
C3 | −0.51064 (16) | 0.62426 (15) | 0.26739 (9) | 0.0250 (3) | |
H3A | −0.5796 | 0.6811 | 0.2672 | 0.030* | |
C4 | −0.39985 (15) | 0.63778 (13) | 0.22180 (8) | 0.0224 (3) | |
H4A | −0.3951 | 0.7031 | 0.1906 | 0.027* | |
C5 | −0.29601 (14) | 0.55362 (13) | 0.22283 (8) | 0.0183 (2) | |
H5A | −0.2215 | 0.5634 | 0.1926 | 0.022* | |
C6 | −0.30241 (13) | 0.45449 (12) | 0.26879 (7) | 0.0156 (2) | |
C7 | −0.19254 (14) | 0.36013 (12) | 0.26595 (7) | 0.0165 (2) | |
H7A | −0.2354 | 0.2820 | 0.2636 | 0.020* | |
H7B | −0.1416 | 0.3710 | 0.2216 | 0.020* | |
C8 | −0.12761 (13) | 0.30580 (11) | 0.39112 (7) | 0.0146 (2) | |
C9 | −0.00312 (13) | 0.30177 (12) | 0.43963 (7) | 0.0149 (2) | |
C10 | 0.10534 (14) | 0.35446 (13) | 0.39145 (7) | 0.0188 (3) | |
C11 | 0.04302 (13) | 0.39495 (12) | 0.31910 (7) | 0.0155 (2) | |
C12 | 0.11909 (14) | 0.34641 (12) | 0.25325 (7) | 0.0169 (2) | |
H12A | 0.2014 | 0.3050 | 0.2673 | 0.020* | |
H12B | 0.0627 | 0.2927 | 0.2250 | 0.020* | |
C13 | 0.14980 (14) | 0.45896 (12) | 0.21270 (7) | 0.0158 (2) | |
C14 | 0.21716 (14) | 0.46231 (12) | 0.14013 (7) | 0.0171 (2) | |
H14A | 0.2206 | 0.5446 | 0.1217 | 0.021* | |
C15 | 0.35852 (14) | 0.40534 (13) | 0.13854 (7) | 0.0185 (3) | |
H15A | 0.4287 | 0.4647 | 0.1466 | 0.022* | |
H15B | 0.3668 | 0.3424 | 0.1745 | 0.022* | |
C16 | 0.23247 (14) | 0.31499 (12) | 0.05037 (7) | 0.0158 (2) | |
C17 | 0.21576 (14) | 0.18392 (12) | 0.07127 (7) | 0.0174 (2) | |
H17A | 0.1211 | 0.1616 | 0.0670 | 0.021* | |
H17B | 0.2425 | 0.1733 | 0.1214 | 0.021* | |
C18 | 0.30090 (15) | 0.10213 (12) | 0.02350 (7) | 0.0193 (3) | |
H18A | 0.2804 | 0.0193 | 0.0350 | 0.023* | |
H18B | 0.3961 | 0.1156 | 0.0337 | 0.023* | |
C19 | 0.27448 (16) | 0.12392 (13) | −0.05699 (8) | 0.0217 (3) | |
H19A | 0.3355 | 0.0748 | −0.0855 | 0.026* | |
H19B | 0.1823 | 0.1007 | −0.0687 | 0.026* | |
C20 | 0.29553 (16) | 0.25566 (13) | −0.07607 (8) | 0.0210 (3) | |
H20A | 0.3899 | 0.2768 | −0.0687 | 0.025* | |
H20B | 0.2741 | 0.2682 | −0.1267 | 0.025* | |
C21 | 0.20631 (15) | 0.33598 (13) | −0.02966 (7) | 0.0196 (3) | |
H21A | 0.2244 | 0.4192 | −0.0413 | 0.023* | |
H21B | 0.1118 | 0.3198 | −0.0403 | 0.023* | |
C22 | −0.02114 (16) | 0.37625 (15) | 0.50857 (8) | 0.0241 (3) | |
H22A | 0.0582 | 0.3686 | 0.5383 | 0.036* | |
H22B | −0.0988 | 0.3479 | 0.5347 | 0.036* | |
H22C | −0.0341 | 0.4589 | 0.4959 | 0.036* | |
C23 | 0.02932 (16) | 0.17141 (13) | 0.45856 (9) | 0.0242 (3) | |
H23A | 0.1118 | 0.1682 | 0.4860 | 0.036* | |
H23B | 0.0399 | 0.1259 | 0.4149 | 0.036* | |
H23C | −0.0434 | 0.1383 | 0.4867 | 0.036* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0155 (4) | 0.0204 (5) | 0.0228 (5) | −0.0023 (4) | 0.0010 (4) | 0.0025 (4) |
O2 | 0.0156 (5) | 0.0515 (8) | 0.0306 (6) | −0.0057 (5) | −0.0042 (5) | 0.0077 (6) |
O3 | 0.0239 (5) | 0.0135 (4) | 0.0186 (4) | −0.0025 (4) | 0.0067 (4) | −0.0024 (4) |
O4 | 0.0170 (5) | 0.0228 (5) | 0.0190 (4) | 0.0046 (4) | −0.0003 (4) | −0.0048 (4) |
O5 | 0.0158 (4) | 0.0199 (4) | 0.0164 (4) | −0.0033 (4) | 0.0021 (4) | −0.0030 (4) |
N1 | 0.0132 (5) | 0.0163 (5) | 0.0134 (5) | −0.0007 (4) | 0.0000 (4) | 0.0004 (4) |
N2 | 0.0215 (6) | 0.0161 (5) | 0.0182 (5) | −0.0012 (4) | 0.0035 (4) | 0.0004 (4) |
C1 | 0.0174 (6) | 0.0222 (6) | 0.0175 (6) | −0.0005 (5) | −0.0017 (5) | −0.0007 (5) |
C2 | 0.0168 (6) | 0.0278 (7) | 0.0235 (7) | 0.0030 (5) | −0.0013 (5) | −0.0047 (6) |
C3 | 0.0192 (7) | 0.0224 (7) | 0.0334 (8) | 0.0042 (5) | −0.0067 (6) | −0.0037 (6) |
C4 | 0.0228 (7) | 0.0163 (6) | 0.0280 (7) | −0.0013 (5) | −0.0091 (6) | 0.0015 (5) |
C5 | 0.0179 (6) | 0.0178 (6) | 0.0193 (6) | −0.0018 (5) | −0.0026 (5) | −0.0008 (5) |
C6 | 0.0158 (6) | 0.0160 (5) | 0.0151 (5) | −0.0001 (4) | −0.0035 (5) | −0.0029 (4) |
C7 | 0.0186 (6) | 0.0165 (5) | 0.0145 (5) | 0.0026 (5) | −0.0032 (5) | −0.0030 (4) |
C8 | 0.0160 (6) | 0.0125 (5) | 0.0154 (5) | 0.0006 (4) | 0.0002 (5) | −0.0007 (4) |
C9 | 0.0148 (6) | 0.0155 (6) | 0.0144 (5) | 0.0006 (4) | −0.0011 (5) | −0.0009 (4) |
C10 | 0.0162 (6) | 0.0209 (6) | 0.0192 (6) | −0.0012 (5) | −0.0002 (5) | 0.0009 (5) |
C11 | 0.0145 (6) | 0.0155 (5) | 0.0165 (6) | −0.0012 (4) | 0.0023 (5) | 0.0004 (5) |
C12 | 0.0193 (6) | 0.0129 (5) | 0.0186 (6) | 0.0014 (4) | 0.0051 (5) | 0.0009 (4) |
C13 | 0.0168 (6) | 0.0138 (5) | 0.0168 (6) | −0.0009 (4) | 0.0016 (5) | 0.0004 (4) |
C14 | 0.0221 (6) | 0.0142 (5) | 0.0150 (5) | −0.0009 (5) | 0.0023 (5) | −0.0002 (4) |
C15 | 0.0185 (6) | 0.0201 (6) | 0.0168 (6) | −0.0032 (5) | 0.0017 (5) | −0.0028 (5) |
C16 | 0.0143 (6) | 0.0169 (5) | 0.0161 (6) | 0.0012 (4) | 0.0004 (5) | −0.0006 (4) |
C17 | 0.0167 (6) | 0.0177 (6) | 0.0178 (6) | −0.0003 (5) | 0.0014 (5) | 0.0022 (5) |
C18 | 0.0190 (6) | 0.0160 (6) | 0.0228 (6) | 0.0014 (5) | −0.0004 (5) | 0.0000 (5) |
C19 | 0.0244 (7) | 0.0205 (6) | 0.0201 (6) | 0.0018 (5) | −0.0003 (6) | −0.0036 (5) |
C20 | 0.0252 (7) | 0.0218 (6) | 0.0162 (6) | 0.0004 (5) | 0.0023 (5) | −0.0007 (5) |
C21 | 0.0236 (7) | 0.0195 (6) | 0.0155 (6) | 0.0029 (5) | −0.0011 (5) | 0.0006 (5) |
C22 | 0.0239 (7) | 0.0290 (7) | 0.0193 (6) | 0.0045 (6) | −0.0026 (6) | −0.0071 (6) |
C23 | 0.0243 (7) | 0.0155 (6) | 0.0329 (8) | 0.0021 (5) | −0.0076 (6) | 0.0027 (6) |
O1—C8 | 1.2207 (16) | C11—C12 | 1.5293 (18) |
O2—C10 | 1.2063 (18) | C12—C13 | 1.4935 (18) |
O3—N2 | 1.4281 (15) | C12—H12A | 0.9700 |
O3—C11 | 1.4550 (16) | C12—H12B | 0.9700 |
O4—C14 | 1.4300 (17) | C13—C14 | 1.4978 (18) |
O4—C16 | 1.4456 (16) | C14—C15 | 1.533 (2) |
O5—C15 | 1.4239 (16) | C14—H14A | 0.9800 |
O5—C16 | 1.4282 (17) | C15—H15A | 0.9700 |
N1—C8 | 1.3676 (17) | C15—H15B | 0.9700 |
N1—C11 | 1.4396 (17) | C16—C21 | 1.5200 (19) |
N1—C7 | 1.4705 (16) | C16—C17 | 1.5214 (19) |
N2—C13 | 1.2765 (17) | C17—C18 | 1.5227 (19) |
C1—C2 | 1.392 (2) | C17—H17A | 0.9700 |
C1—C6 | 1.3974 (19) | C17—H17B | 0.9700 |
C1—H1A | 0.9300 | C18—C19 | 1.530 (2) |
C2—C3 | 1.385 (2) | C18—H18A | 0.9700 |
C2—H2A | 0.9300 | C18—H18B | 0.9700 |
C3—C4 | 1.389 (2) | C19—C20 | 1.526 (2) |
C3—H3A | 0.9300 | C19—H19A | 0.9700 |
C4—C5 | 1.390 (2) | C19—H19B | 0.9700 |
C4—H4A | 0.9300 | C20—C21 | 1.521 (2) |
C5—C6 | 1.3961 (19) | C20—H20A | 0.9700 |
C5—H5A | 0.9300 | C20—H20B | 0.9700 |
C6—C7 | 1.5120 (19) | C21—H21A | 0.9700 |
C7—H7A | 0.9700 | C21—H21B | 0.9700 |
C7—H7B | 0.9700 | C22—H22A | 0.9600 |
C8—C9 | 1.5216 (18) | C22—H22B | 0.9600 |
C9—C10 | 1.5113 (19) | C22—H22C | 0.9600 |
C9—C23 | 1.530 (2) | C23—H23A | 0.9600 |
C9—C22 | 1.532 (2) | C23—H23B | 0.9600 |
C10—C11 | 1.5399 (19) | C23—H23C | 0.9600 |
N2—O3—C11 | 109.58 (10) | O4—C14—C15 | 103.25 (10) |
C14—O4—C16 | 108.96 (10) | C13—C14—C15 | 114.24 (11) |
C15—O5—C16 | 106.46 (10) | O4—C14—H14A | 110.5 |
C8—N1—C11 | 114.83 (11) | C13—C14—H14A | 110.5 |
C8—N1—C7 | 121.48 (11) | C15—C14—H14A | 110.5 |
C11—N1—C7 | 122.64 (11) | O5—C15—C14 | 102.31 (11) |
C13—N2—O3 | 109.12 (11) | O5—C15—H15A | 111.3 |
C2—C1—C6 | 120.46 (13) | C14—C15—H15A | 111.3 |
C2—C1—H1A | 119.8 | O5—C15—H15B | 111.3 |
C6—C1—H1A | 119.8 | C14—C15—H15B | 111.3 |
C3—C2—C1 | 120.08 (14) | H15A—C15—H15B | 109.2 |
C3—C2—H2A | 120.0 | O5—C16—O4 | 105.73 (10) |
C1—C2—H2A | 120.0 | O5—C16—C21 | 108.34 (11) |
C2—C3—C4 | 120.08 (14) | O4—C16—C21 | 109.29 (11) |
C2—C3—H3A | 120.0 | O5—C16—C17 | 111.57 (11) |
C4—C3—H3A | 120.0 | O4—C16—C17 | 109.54 (11) |
C3—C4—C5 | 119.91 (14) | C21—C16—C17 | 112.15 (11) |
C3—C4—H4A | 120.0 | C16—C17—C18 | 111.64 (11) |
C5—C4—H4A | 120.0 | C16—C17—H17A | 109.3 |
C4—C5—C6 | 120.68 (13) | C18—C17—H17A | 109.3 |
C4—C5—H5A | 119.7 | C16—C17—H17B | 109.3 |
C6—C5—H5A | 119.7 | C18—C17—H17B | 109.3 |
C5—C6—C1 | 118.79 (13) | H17A—C17—H17B | 108.0 |
C5—C6—C7 | 119.86 (12) | C17—C18—C19 | 112.02 (12) |
C1—C6—C7 | 121.23 (12) | C17—C18—H18A | 109.2 |
N1—C7—C6 | 115.81 (10) | C19—C18—H18A | 109.2 |
N1—C7—H7A | 108.3 | C17—C18—H18B | 109.2 |
C6—C7—H7A | 108.3 | C19—C18—H18B | 109.2 |
N1—C7—H7B | 108.3 | H18A—C18—H18B | 107.9 |
C6—C7—H7B | 108.3 | C20—C19—C18 | 110.78 (12) |
H7A—C7—H7B | 107.4 | C20—C19—H19A | 109.5 |
O1—C8—N1 | 124.21 (13) | C18—C19—H19A | 109.5 |
O1—C8—C9 | 125.55 (12) | C20—C19—H19B | 109.5 |
N1—C8—C9 | 110.18 (11) | C18—C19—H19B | 109.5 |
C10—C9—C8 | 102.28 (11) | H19A—C19—H19B | 108.1 |
C10—C9—C23 | 110.89 (12) | C21—C20—C19 | 110.98 (12) |
C8—C9—C23 | 109.38 (11) | C21—C20—H20A | 109.4 |
C10—C9—C22 | 111.19 (12) | C19—C20—H20A | 109.4 |
C8—C9—C22 | 112.38 (11) | C21—C20—H20B | 109.4 |
C23—C9—C22 | 110.46 (12) | C19—C20—H20B | 109.4 |
O2—C10—C9 | 127.14 (14) | H20A—C20—H20B | 108.0 |
O2—C10—C11 | 122.72 (13) | C16—C21—C20 | 111.10 (11) |
C9—C10—C11 | 110.08 (11) | C16—C21—H21A | 109.4 |
N1—C11—O3 | 110.40 (11) | C20—C21—H21A | 109.4 |
N1—C11—C12 | 116.94 (11) | C16—C21—H21B | 109.4 |
O3—C11—C12 | 104.65 (11) | C20—C21—H21B | 109.4 |
N1—C11—C10 | 102.50 (11) | H21A—C21—H21B | 108.0 |
O3—C11—C10 | 109.28 (11) | C9—C22—H22A | 109.5 |
C12—C11—C10 | 113.06 (11) | C9—C22—H22B | 109.5 |
C13—C12—C11 | 101.63 (11) | H22A—C22—H22B | 109.5 |
C13—C12—H12A | 111.4 | C9—C22—H22C | 109.5 |
C11—C12—H12A | 111.4 | H22A—C22—H22C | 109.5 |
C13—C12—H12B | 111.4 | H22B—C22—H22C | 109.5 |
C11—C12—H12B | 111.4 | C9—C23—H23A | 109.5 |
H12A—C12—H12B | 109.3 | C9—C23—H23B | 109.5 |
N2—C13—C12 | 114.45 (11) | H23A—C23—H23B | 109.5 |
N2—C13—C14 | 121.45 (12) | C9—C23—H23C | 109.5 |
C12—C13—C14 | 124.11 (11) | H23A—C23—H23C | 109.5 |
O4—C14—C13 | 107.61 (11) | H23B—C23—H23C | 109.5 |
C11—O3—N2—C13 | −5.71 (15) | O2—C10—C11—N1 | 175.05 (16) |
C6—C1—C2—C3 | 0.9 (2) | C9—C10—C11—N1 | −2.28 (14) |
C1—C2—C3—C4 | 0.0 (2) | O2—C10—C11—O3 | −67.84 (19) |
C2—C3—C4—C5 | −0.8 (2) | C9—C10—C11—O3 | 114.84 (12) |
C3—C4—C5—C6 | 0.7 (2) | O2—C10—C11—C12 | 48.3 (2) |
C4—C5—C6—C1 | 0.26 (19) | C9—C10—C11—C12 | −129.05 (12) |
C4—C5—C6—C7 | 176.37 (12) | N1—C11—C12—C13 | 115.85 (13) |
C2—C1—C6—C5 | −1.07 (19) | O3—C11—C12—C13 | −6.62 (13) |
C2—C1—C6—C7 | −177.13 (13) | C10—C11—C12—C13 | −125.45 (12) |
C8—N1—C7—C6 | 81.76 (15) | O3—N2—C13—C12 | 1.00 (16) |
C11—N1—C7—C6 | −110.56 (14) | O3—N2—C13—C14 | −179.24 (11) |
C5—C6—C7—N1 | 106.45 (14) | C11—C12—C13—N2 | 3.71 (16) |
C1—C6—C7—N1 | −77.53 (16) | C11—C12—C13—C14 | −176.04 (12) |
C11—N1—C8—O1 | −175.16 (13) | C16—O4—C14—C13 | −136.03 (11) |
C7—N1—C8—O1 | −6.6 (2) | C16—O4—C14—C15 | −14.88 (13) |
C11—N1—C8—C9 | 2.36 (15) | N2—C13—C14—O4 | −125.12 (14) |
C7—N1—C8—C9 | 170.94 (11) | C12—C13—C14—O4 | 54.62 (17) |
O1—C8—C9—C10 | 173.96 (13) | N2—C13—C14—C15 | 120.89 (14) |
N1—C8—C9—C10 | −3.52 (14) | C12—C13—C14—C15 | −59.38 (17) |
O1—C8—C9—C23 | 56.35 (18) | C16—O5—C15—C14 | −36.76 (12) |
N1—C8—C9—C23 | −121.13 (13) | O4—C14—C15—O5 | 31.35 (13) |
O1—C8—C9—C22 | −66.72 (18) | C13—C14—C15—O5 | 147.89 (11) |
N1—C8—C9—C22 | 115.80 (13) | C15—O5—C16—O4 | 28.29 (13) |
C8—C9—C10—O2 | −173.71 (16) | C15—O5—C16—C21 | 145.36 (11) |
C23—C9—C10—O2 | −57.2 (2) | C15—O5—C16—C17 | −90.72 (12) |
C22—C9—C10—O2 | 66.1 (2) | C14—O4—C16—O5 | −7.12 (14) |
C8—C9—C10—C11 | 3.47 (14) | C14—O4—C16—C21 | −123.54 (12) |
C23—C9—C10—C11 | 120.00 (12) | C14—O4—C16—C17 | 113.23 (12) |
C22—C9—C10—C11 | −116.68 (13) | O5—C16—C17—C18 | −68.70 (14) |
C8—N1—C11—O3 | −116.37 (12) | O4—C16—C17—C18 | 174.58 (11) |
C7—N1—C11—O3 | 75.20 (15) | C21—C16—C17—C18 | 53.04 (16) |
C8—N1—C11—C12 | 124.19 (13) | C16—C17—C18—C19 | −52.92 (16) |
C7—N1—C11—C12 | −44.24 (17) | C17—C18—C19—C20 | 54.69 (17) |
C8—N1—C11—C10 | −0.06 (14) | C18—C19—C20—C21 | −56.37 (17) |
C7—N1—C11—C10 | −168.49 (11) | O5—C16—C21—C20 | 68.58 (14) |
N2—O3—C11—N1 | −118.92 (11) | O4—C16—C21—C20 | −176.67 (11) |
N2—O3—C11—C12 | 7.71 (14) | C17—C16—C21—C20 | −54.99 (16) |
N2—O3—C11—C10 | 129.07 (11) | C19—C20—C21—C16 | 56.61 (17) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O1 | 0.93 | 2.48 | 3.1440 (18) | 129 |
C14—H14A···O1i | 0.98 | 2.50 | 3.4692 (17) | 171 |
C15—H15A···Cgii | 0.97 | 2.89 | 3.6484 (15) | 136 |
Symmetry codes: (i) −x, y+1/2, −z+1/2; (ii) x+1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C23H28N2O5 |
Mr | 412.47 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 100 |
a, b, c (Å) | 9.8666 (2), 11.1565 (3), 18.4884 (4) |
V (Å3) | 2035.14 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.10 |
Crystal size (mm) | 0.49 × 0.23 × 0.16 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD area-detector |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.931, 0.985 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 26273, 4621, 4013 |
Rint | 0.034 |
(sin θ/λ)max (Å−1) | 0.788 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.099, 1.06 |
No. of reflections | 4621 |
No. of parameters | 273 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.27, −0.26 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1A···O1 | 0.9300 | 2.4800 | 3.1440 (18) | 129.00 |
C14—H14A···O1i | 0.9800 | 2.5000 | 3.4692 (17) | 171.20 |
C15—H15A···Cgii | 0.9700 | 2.8900 | 3.6484 (15) | 136 |
Symmetry codes: (i) −x, y+1/2, −z+1/2; (ii) x+1, y, z. |
Natural products containing pyrrolidinone carbon skeletons continue to attract the interest of chemists and biologists due to their challenging structures and remarkable biological properties (Iida et al., 1986; Matkhalikova et al., 1969; Reddy & Rao, 2006; Reiner, 2007; Royles, 1996). Amongst these, polychlorinated pyrrolidinone i.e. dysidamide analogues extracted from the marine sponge, Lamellodysidea herbacea, display remarkable biological activities (Sauleau & Bourguet-Kondracki, 2005). We have synthesized the title compound, which may act as an essential intermediate in the synthesis of dysidamide and its crystal structure is reported herein.
The molecular structure of the title compound is shown in Fig. 1. The 4,5-dihydroisoxazole ring (O3/N2/C11–C13) adopts an envelope conformation with atom C11 displaced from the mean plane by 0.045 (1) Å; the puckering parameters (Cremer & Pople, 1975) are Q = 0.0730 (13) Å and Θ = 330.2 (11)° whereas the conformation of dioxolane ring (O4/O5/C14–C16) is twisted, as reflected by the puckering parameters, Q = 0.3405 (13) Å and Θ = 82.9 (2)°, with torsion angle C16–O5–C15–C14 being -36.76 (12) °. The molecular structure is stabilized by an intramolecular C1—H1A···O1 hydrogen bond which generates an S(7) ring motif (Bernstein et al., 1995). Bond lengths and angles are within normal ranges, and comparable to a closely related structure (Bathich et al., 2009).
In the solid state (Fig. 2), the molecules are linked via intermolecular C14—H14A···O1i hydrogen bonds to form one-dimensional chains along the b-axis and are further consolidated by C–H···π (Table 1) interactions.