organic compounds
10α-Hydroxy-4,9-dimethyl-13-[(4-phenylpiperazin-1-yl)methyl]-3,8,15-trioxatetracyclo[10.3.0.02,4.07,9]tetradecan-14-one
aLaboratoire de Chimie Biomoléculaire, Substances Naturelles et Réactivité, URAC 16, Faculté des Sciences Semlalia, BP 2390, Bd My Abdellah, 40000 Marrakech, Morocco, bUniversite Blaise Pascal, Laboratoire des Mate'riaux Inorganiques, UMR CNRS 6002, 24 Avenue des Landais, 63177 Aubiere, France, and cLaboratoire de Chimie Bioorganique et Analytique, URAC 22, BP 146, FSTM, Université Hassan II, Mohammedia-Casablanca 20810 Mohammedia, Morocco
*Correspondence e-mail: mberraho@yahoo.fr
The title compound, C25H34N2O5, was synthesized from 9α-hydroxyparthenolide (9α-hydroxy-4,8-dimethyl-12-methylene-3,14-dioxatricyclo[9.3.0.02,4]tetradec-7-en-13-one), which was isolated from the chloroform extract of the aerial parts of Anvillea radiata. The molecule contains a fused five- and ten-membered ring system. The ten-membered ring adopts an approximate chair–chair conformation, while the five-membered ring is in an with the C atom closest to the hydroxy group forming the flap. The piperazine ring is in a chair conformation. In the crystal, O—H⋯O hydrogen bonds connect molecules into chains along [100]. Weak intermolecular C—H⋯O hydrogen bonds are also present.
Related literature
For background to the medicinal uses of the plant Anvillea radiata, see: Abdel Sattar et al. (1996); Bellakhdar (1997); El Hassany et al. (2004). For the reactivity of this sesquiterpene, see: Hwang et al. (2006); Neukirch et al. (2003); Neelakantan et al. (2009). For the synthesis, see: Moumou et al. (2010). For ring puckering parameters, see: Cremer & Pople (1975).
Experimental
Crystal data
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Data collection
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Refinement
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Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXS97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia,1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
10.1107/S1600536811042012/lh5350sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811042012/lh5350Isup2.hkl
A mixture of 6β,7α-epoxy-9α-hydoxypartenolide (9α-hydroxy-4,8-dimethyl-12- methylen-3,14-dioxa-tricyclo[9.3.0.02,4]tetradec-7-en-13-one) (0.5 g, 2 mmol) and one equivalent of 1-phenylpiperazine in EtOH (20 ml) was stirred for twelve hours at room temperature. Then the reaction was stopped by adding water (10 ml) and extracted three times with ethyl acetate (3 x 20 ml). The combined organic layers were dried over anhydrous MgSO4, filtered and concentrated under vacuum to give 895 mg (1.8 mmol) of the title compound, which was recrystallized in ethyl acetate.
All H atoms were fixed geometrically and treated as riding with C—H = 0.96 Å (methyl), 0.97 Å (methylene), 0. 98Å (methine), O—H = 0.82Å and with Uiso(H) = 1.2Ueq (methylene, methine) or Uiso(H) = 1.5Ueq (methyl, OH). In the absence of significant
the could not be reliably determined and thus the Friedel pairs were merged.Data collection: APEX2 (Bruker, 2005); cell
SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXS97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia,1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999).C25H34N2O5 | F(000) = 952 |
Mr = 442.54 | Dx = 1.264 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 10922 reflections |
a = 7.7666 (5) Å | θ = 2.7–26.4° |
b = 9.6059 (8) Å | µ = 0.09 mm−1 |
c = 31.181 (2) Å | T = 298 K |
V = 2326.2 (3) Å3 | Prism, colourless |
Z = 4 | 0.45 × 0.36 × 0.28 mm |
Bruker X8 APEX CCD area-detector diffractometer | 2362 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.024 |
Graphite monochromator | θmax = 26.4°, θmin = 2.7° |
ϕ and ω scans | h = −9→9 |
10922 measured reflections | k = −11→7 |
2723 independent reflections | l = −38→34 |
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) = 0.104 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0537P)2 + 0.4378P] where P = (Fo2 + 2Fc2)/3 |
2723 reflections | (Δ/σ)max < 0.001 |
293 parameters | Δρmax = 0.17 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
C25H34N2O5 | V = 2326.2 (3) Å3 |
Mr = 442.54 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 7.7666 (5) Å | µ = 0.09 mm−1 |
b = 9.6059 (8) Å | T = 298 K |
c = 31.181 (2) Å | 0.45 × 0.36 × 0.28 mm |
Bruker X8 APEX CCD area-detector diffractometer | 2362 reflections with I > 2σ(I) |
10922 measured reflections | Rint = 0.024 |
2723 independent reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.104 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.17 e Å−3 |
2723 reflections | Δρmin = −0.18 e Å−3 |
293 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes. |
x | y | z | Uiso*/Ueq | ||
C1 | 0.5441 (3) | 0.2316 (2) | 0.91768 (7) | 0.0347 (5) | |
H1 | 0.4879 | 0.1665 | 0.8979 | 0.042* | |
C2 | 0.5370 (3) | 0.1777 (2) | 0.96267 (7) | 0.0327 (5) | |
H2 | 0.6143 | 0.2252 | 0.9827 | 0.039* | |
C3 | 0.4930 (3) | 0.0341 (3) | 0.97477 (7) | 0.0349 (5) | |
C4 | 0.5705 (3) | −0.0184 (3) | 1.01607 (8) | 0.0415 (6) | |
H4A | 0.4920 | −0.0840 | 1.0293 | 0.050* | |
H4B | 0.5859 | 0.0591 | 1.0356 | 0.050* | |
C5 | 0.7438 (3) | −0.0892 (3) | 1.00857 (8) | 0.0435 (6) | |
H5A | 0.7981 | −0.1076 | 1.0360 | 0.052* | |
H5B | 0.7252 | −0.1777 | 0.9943 | 0.052* | |
C6 | 0.8616 (3) | −0.0009 (3) | 0.98170 (8) | 0.0383 (6) | |
H6 | 0.8588 | 0.0985 | 0.9888 | 0.046* | |
C7 | 0.9154 (3) | −0.0312 (3) | 0.93753 (8) | 0.0383 (6) | |
C8 | 0.9740 (3) | 0.0848 (3) | 0.90772 (8) | 0.0404 (6) | |
H8 | 1.0567 | 0.0437 | 0.8876 | 0.048* | |
C9 | 0.8307 (4) | 0.1514 (3) | 0.88067 (8) | 0.0416 (6) | |
H9A | 0.7518 | 0.0783 | 0.8720 | 0.050* | |
H9B | 0.8825 | 0.1885 | 0.8548 | 0.050* | |
C10 | 0.7253 (3) | 0.2680 (2) | 0.90184 (7) | 0.0311 (5) | |
H10 | 0.7914 | 0.3042 | 0.9262 | 0.037* | |
C11 | 0.5317 (3) | 0.4573 (3) | 0.89329 (8) | 0.0414 (6) | |
C12 | 0.6839 (3) | 0.3904 (3) | 0.87154 (7) | 0.0376 (6) | |
H12 | 0.6455 | 0.3523 | 0.8440 | 0.045* | |
C13 | 0.8251 (4) | 0.4953 (3) | 0.86298 (8) | 0.0431 (6) | |
H13A | 0.7729 | 0.5793 | 0.8516 | 0.052* | |
H13B | 0.8786 | 0.5194 | 0.8901 | 0.052* | |
C14 | 0.4374 (4) | −0.0747 (3) | 0.94329 (9) | 0.0473 (6) | |
H14A | 0.3988 | −0.0306 | 0.9174 | 0.071* | |
H14B | 0.3451 | −0.1284 | 0.9554 | 0.071* | |
H14C | 0.5328 | −0.1349 | 0.9369 | 0.071* | |
C15 | 1.1040 (4) | 0.5453 (3) | 0.83687 (8) | 0.0519 (7) | |
H15A | 1.1452 | 0.5467 | 0.8662 | 0.062* | |
H15B | 1.0668 | 0.6387 | 0.8295 | 0.062* | |
C16 | 0.9013 (3) | 0.4473 (3) | 0.78904 (8) | 0.0490 (7) | |
H16A | 0.8618 | 0.5393 | 0.7808 | 0.059* | |
H16B | 0.8051 | 0.3836 | 0.7864 | 0.059* | |
C17 | 1.0437 (4) | 0.4021 (3) | 0.75924 (8) | 0.0509 (7) | |
H17A | 1.0794 | 0.3082 | 0.7664 | 0.061* | |
H17B | 1.0018 | 0.4018 | 0.7299 | 0.061* | |
C18 | 1.2483 (4) | 0.5027 (4) | 0.80761 (8) | 0.0542 (8) | |
H18A | 1.3418 | 0.5691 | 0.8100 | 0.065* | |
H18B | 1.2915 | 0.4122 | 0.8163 | 0.065* | |
C19 | 1.3260 (4) | 0.4797 (3) | 0.73301 (8) | 0.0448 (6) | |
C20 | 1.3357 (4) | 0.3688 (3) | 0.70444 (8) | 0.0473 (6) | |
H20 | 1.2490 | 0.3020 | 0.7040 | 0.057* | |
C21 | 1.4749 (4) | 0.3575 (4) | 0.67644 (8) | 0.0571 (8) | |
H21 | 1.4797 | 0.2835 | 0.6573 | 0.069* | |
C22 | 1.6044 (4) | 0.4538 (4) | 0.67685 (9) | 0.0645 (9) | |
H22 | 1.6992 | 0.4434 | 0.6589 | 0.077* | |
C23 | 1.5932 (4) | 0.5657 (4) | 0.70384 (10) | 0.0714 (10) | |
H23 | 1.6792 | 0.6331 | 0.7035 | 0.086* | |
C24 | 1.4562 (4) | 0.5797 (4) | 0.73158 (9) | 0.0615 (8) | |
H24 | 1.4503 | 0.6568 | 0.7496 | 0.074* | |
C26 | 0.8708 (4) | −0.1630 (3) | 0.91409 (9) | 0.0535 (7) | |
H26A | 0.8222 | −0.2288 | 0.9338 | 0.080* | |
H26B | 0.9730 | −0.2015 | 0.9015 | 0.080* | |
H26C | 0.7886 | −0.1428 | 0.8919 | 0.080* | |
N1 | 0.9589 (3) | 0.4506 (2) | 0.83356 (6) | 0.0398 (5) | |
N2 | 1.1901 (3) | 0.4959 (2) | 0.76275 (6) | 0.0461 (6) | |
O1 | 0.4819 (3) | 0.5750 (2) | 0.89055 (6) | 0.0565 (5) | |
O2 | 0.3686 (2) | 0.14622 (18) | 0.97984 (5) | 0.0400 (4) | |
O3 | 0.4524 (2) | 0.36458 (19) | 0.91853 (5) | 0.0447 (4) | |
O5 | 1.0321 (2) | −0.0547 (2) | 0.97319 (6) | 0.0543 (5) | |
O4 | 1.0600 (2) | 0.19268 (19) | 0.92937 (7) | 0.0538 (5) | |
H4 | 1.1392 | 0.1600 | 0.9436 | 0.081* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0319 (12) | 0.0320 (12) | 0.0403 (12) | −0.0020 (11) | −0.0021 (11) | 0.0019 (10) |
C2 | 0.0281 (11) | 0.0336 (12) | 0.0364 (11) | −0.0008 (11) | 0.0030 (10) | 0.0008 (9) |
C3 | 0.0274 (11) | 0.0351 (12) | 0.0421 (12) | −0.0020 (10) | 0.0068 (10) | 0.0002 (10) |
C4 | 0.0464 (14) | 0.0380 (13) | 0.0402 (12) | −0.0040 (12) | 0.0048 (11) | 0.0072 (11) |
C5 | 0.0486 (14) | 0.0374 (14) | 0.0446 (13) | 0.0030 (12) | −0.0051 (12) | 0.0065 (11) |
C6 | 0.0304 (12) | 0.0343 (13) | 0.0502 (13) | 0.0040 (11) | −0.0070 (11) | −0.0018 (11) |
C7 | 0.0330 (12) | 0.0338 (13) | 0.0479 (13) | 0.0062 (11) | −0.0035 (11) | −0.0007 (11) |
C8 | 0.0326 (12) | 0.0363 (13) | 0.0522 (14) | 0.0066 (11) | 0.0058 (11) | −0.0029 (11) |
C9 | 0.0485 (15) | 0.0362 (13) | 0.0401 (12) | 0.0049 (13) | 0.0062 (12) | 0.0012 (11) |
C10 | 0.0303 (12) | 0.0302 (12) | 0.0328 (11) | −0.0005 (10) | −0.0014 (9) | 0.0020 (9) |
C11 | 0.0404 (13) | 0.0420 (14) | 0.0417 (13) | 0.0051 (13) | −0.0057 (11) | 0.0079 (11) |
C12 | 0.0414 (13) | 0.0336 (13) | 0.0377 (12) | 0.0019 (11) | −0.0008 (11) | 0.0024 (10) |
C13 | 0.0503 (14) | 0.0352 (13) | 0.0438 (13) | −0.0031 (13) | 0.0073 (12) | 0.0012 (11) |
C14 | 0.0444 (14) | 0.0394 (15) | 0.0582 (15) | −0.0041 (13) | 0.0002 (13) | −0.0033 (12) |
C15 | 0.0527 (16) | 0.0597 (18) | 0.0434 (13) | −0.0120 (16) | 0.0041 (12) | −0.0116 (13) |
C16 | 0.0419 (14) | 0.0639 (18) | 0.0413 (13) | −0.0058 (15) | −0.0014 (11) | 0.0009 (13) |
C17 | 0.0485 (15) | 0.0646 (18) | 0.0396 (13) | −0.0098 (16) | −0.0015 (12) | −0.0086 (13) |
C18 | 0.0467 (14) | 0.073 (2) | 0.0431 (13) | −0.0101 (15) | 0.0003 (12) | −0.0112 (15) |
C19 | 0.0479 (14) | 0.0498 (15) | 0.0368 (12) | −0.0031 (14) | 0.0010 (11) | 0.0005 (12) |
C20 | 0.0538 (16) | 0.0476 (15) | 0.0403 (13) | −0.0030 (15) | 0.0013 (13) | 0.0019 (12) |
C21 | 0.069 (2) | 0.0614 (18) | 0.0413 (14) | 0.0143 (19) | 0.0050 (14) | 0.0000 (14) |
C22 | 0.0538 (18) | 0.098 (3) | 0.0419 (15) | 0.003 (2) | 0.0075 (13) | 0.0051 (17) |
C23 | 0.0574 (19) | 0.099 (3) | 0.0578 (18) | −0.030 (2) | 0.0051 (16) | 0.0013 (19) |
C24 | 0.0633 (18) | 0.068 (2) | 0.0528 (16) | −0.0199 (19) | 0.0080 (15) | −0.0106 (15) |
C26 | 0.0663 (19) | 0.0335 (14) | 0.0608 (16) | 0.0041 (14) | 0.0044 (15) | −0.0079 (13) |
N1 | 0.0409 (11) | 0.0424 (12) | 0.0362 (10) | −0.0028 (11) | 0.0019 (9) | −0.0001 (9) |
N2 | 0.0454 (12) | 0.0543 (14) | 0.0386 (10) | −0.0091 (12) | 0.0029 (10) | −0.0090 (10) |
O1 | 0.0590 (12) | 0.0477 (11) | 0.0627 (11) | 0.0188 (11) | 0.0078 (10) | 0.0146 (9) |
O2 | 0.0310 (8) | 0.0414 (9) | 0.0477 (9) | 0.0018 (8) | 0.0081 (7) | 0.0000 (8) |
O3 | 0.0333 (9) | 0.0458 (10) | 0.0548 (10) | 0.0089 (9) | 0.0045 (8) | 0.0136 (9) |
O5 | 0.0371 (10) | 0.0594 (12) | 0.0662 (12) | 0.0123 (10) | −0.0069 (9) | 0.0060 (10) |
O4 | 0.0350 (10) | 0.0429 (11) | 0.0834 (14) | −0.0036 (9) | −0.0090 (10) | 0.0003 (10) |
C1—O3 | 1.463 (3) | C13—H13A | 0.9700 |
C1—C2 | 1.496 (3) | C13—H13B | 0.9700 |
C1—C10 | 1.532 (3) | C14—H14A | 0.9600 |
C1—H1 | 0.9800 | C14—H14B | 0.9600 |
C2—O2 | 1.445 (3) | C14—H14C | 0.9600 |
C2—C3 | 1.471 (3) | C15—N1 | 1.452 (3) |
C2—H2 | 0.9800 | C15—C18 | 1.502 (4) |
C3—O2 | 1.456 (3) | C15—H15A | 0.9700 |
C3—C14 | 1.497 (4) | C15—H15B | 0.9700 |
C3—C4 | 1.508 (3) | C16—N1 | 1.459 (3) |
C4—C5 | 1.526 (4) | C16—C17 | 1.508 (4) |
C4—H4A | 0.9700 | C16—H16A | 0.9700 |
C4—H4B | 0.9700 | C16—H16B | 0.9700 |
C5—C6 | 1.503 (4) | C17—N2 | 1.455 (3) |
C5—H5A | 0.9700 | C17—H17A | 0.9700 |
C5—H5B | 0.9700 | C17—H17B | 0.9700 |
C6—O5 | 1.446 (3) | C18—N2 | 1.471 (3) |
C6—C7 | 1.468 (3) | C18—H18A | 0.9700 |
C6—H6 | 0.9800 | C18—H18B | 0.9700 |
C7—O5 | 1.452 (3) | C19—C20 | 1.390 (4) |
C7—C26 | 1.502 (4) | C19—C24 | 1.395 (4) |
C7—C8 | 1.521 (4) | C19—N2 | 1.414 (3) |
C8—O4 | 1.406 (3) | C20—C21 | 1.394 (4) |
C8—C9 | 1.536 (3) | C20—H20 | 0.9300 |
C8—H8 | 0.9800 | C21—C22 | 1.367 (5) |
C9—C10 | 1.537 (3) | C21—H21 | 0.9300 |
C9—H9A | 0.9700 | C22—C23 | 1.368 (5) |
C9—H9B | 0.9700 | C22—H22 | 0.9300 |
C10—C12 | 1.542 (3) | C23—C24 | 1.378 (4) |
C10—H10 | 0.9800 | C23—H23 | 0.9300 |
C11—O1 | 1.198 (3) | C24—H24 | 0.9300 |
C11—O3 | 1.339 (3) | C26—H26A | 0.9600 |
C11—C12 | 1.507 (3) | C26—H26B | 0.9600 |
C12—C13 | 1.513 (4) | C26—H26C | 0.9600 |
C12—H12 | 0.9800 | O4—H4 | 0.8200 |
C13—N1 | 1.451 (3) | ||
O3—C1—C2 | 105.50 (18) | N1—C13—H13A | 108.4 |
O3—C1—C10 | 104.70 (18) | C12—C13—H13A | 108.4 |
C2—C1—C10 | 114.50 (19) | N1—C13—H13B | 108.4 |
O3—C1—H1 | 110.6 | C12—C13—H13B | 108.4 |
C2—C1—H1 | 110.6 | H13A—C13—H13B | 107.4 |
C10—C1—H1 | 110.6 | C3—C14—H14A | 109.5 |
O2—C2—C3 | 59.88 (14) | C3—C14—H14B | 109.5 |
O2—C2—C1 | 116.93 (19) | H14A—C14—H14B | 109.5 |
C3—C2—C1 | 125.0 (2) | C3—C14—H14C | 109.5 |
O2—C2—H2 | 114.5 | H14A—C14—H14C | 109.5 |
C3—C2—H2 | 114.5 | H14B—C14—H14C | 109.5 |
C1—C2—H2 | 114.5 | N1—C15—C18 | 111.4 (2) |
O2—C3—C2 | 59.19 (15) | N1—C15—H15A | 109.3 |
O2—C3—C14 | 113.4 (2) | C18—C15—H15A | 109.3 |
C2—C3—C14 | 123.6 (2) | N1—C15—H15B | 109.3 |
O2—C3—C4 | 114.79 (19) | C18—C15—H15B | 109.3 |
C2—C3—C4 | 116.1 (2) | H15A—C15—H15B | 108.0 |
C14—C3—C4 | 116.2 (2) | N1—C16—C17 | 111.6 (2) |
C3—C4—C5 | 111.7 (2) | N1—C16—H16A | 109.3 |
C3—C4—H4A | 109.3 | C17—C16—H16A | 109.3 |
C5—C4—H4A | 109.3 | N1—C16—H16B | 109.3 |
C3—C4—H4B | 109.3 | C17—C16—H16B | 109.3 |
C5—C4—H4B | 109.3 | H16A—C16—H16B | 108.0 |
H4A—C4—H4B | 107.9 | N2—C17—C16 | 110.4 (2) |
C6—C5—C4 | 111.8 (2) | N2—C17—H17A | 109.6 |
C6—C5—H5A | 109.3 | C16—C17—H17A | 109.6 |
C4—C5—H5A | 109.3 | N2—C17—H17B | 109.6 |
C6—C5—H5B | 109.3 | C16—C17—H17B | 109.6 |
C4—C5—H5B | 109.3 | H17A—C17—H17B | 108.1 |
H5A—C5—H5B | 107.9 | N2—C18—C15 | 111.1 (2) |
O5—C6—C7 | 59.77 (15) | N2—C18—H18A | 109.4 |
O5—C6—C5 | 117.3 (2) | C15—C18—H18A | 109.4 |
C7—C6—C5 | 125.7 (2) | N2—C18—H18B | 109.4 |
O5—C6—H6 | 114.2 | C15—C18—H18B | 109.4 |
C7—C6—H6 | 114.2 | H18A—C18—H18B | 108.0 |
C5—C6—H6 | 114.2 | C20—C19—C24 | 117.9 (3) |
O5—C7—C6 | 59.36 (15) | C20—C19—N2 | 123.0 (2) |
O5—C7—C26 | 112.7 (2) | C24—C19—N2 | 119.1 (2) |
C6—C7—C26 | 123.9 (2) | C19—C20—C21 | 120.2 (3) |
O5—C7—C8 | 113.3 (2) | C19—C20—H20 | 119.9 |
C6—C7—C8 | 120.8 (2) | C21—C20—H20 | 119.9 |
C26—C7—C8 | 112.9 (2) | C22—C21—C20 | 120.8 (3) |
O4—C8—C7 | 112.9 (2) | C22—C21—H21 | 119.6 |
O4—C8—C9 | 107.5 (2) | C20—C21—H21 | 119.6 |
C7—C8—C9 | 115.1 (2) | C21—C22—C23 | 119.4 (3) |
O4—C8—H8 | 107.0 | C21—C22—H22 | 120.3 |
C7—C8—H8 | 107.0 | C23—C22—H22 | 120.3 |
C9—C8—H8 | 107.0 | C22—C23—C24 | 120.8 (3) |
C8—C9—C10 | 117.0 (2) | C22—C23—H23 | 119.6 |
C8—C9—H9A | 108.0 | C24—C23—H23 | 119.6 |
C10—C9—H9A | 108.0 | C23—C24—C19 | 120.8 (3) |
C8—C9—H9B | 108.0 | C23—C24—H24 | 119.6 |
C10—C9—H9B | 108.0 | C19—C24—H24 | 119.6 |
H9A—C9—H9B | 107.3 | C7—C26—H26A | 109.5 |
C1—C10—C9 | 117.5 (2) | C7—C26—H26B | 109.5 |
C1—C10—C12 | 100.36 (18) | H26A—C26—H26B | 109.5 |
C9—C10—C12 | 113.83 (19) | C7—C26—H26C | 109.5 |
C1—C10—H10 | 108.2 | H26A—C26—H26C | 109.5 |
C9—C10—H10 | 108.2 | H26B—C26—H26C | 109.5 |
C12—C10—H10 | 108.2 | C13—N1—C15 | 108.97 (19) |
O1—C11—O3 | 121.5 (2) | C13—N1—C16 | 112.8 (2) |
O1—C11—C12 | 128.6 (2) | C15—N1—C16 | 108.6 (2) |
O3—C11—C12 | 109.9 (2) | C19—N2—C17 | 117.8 (2) |
C11—C12—C13 | 111.3 (2) | C19—N2—C18 | 113.5 (2) |
C11—C12—C10 | 102.31 (19) | C17—N2—C18 | 109.8 (2) |
C13—C12—C10 | 117.7 (2) | C2—O2—C3 | 60.93 (15) |
C11—C12—H12 | 108.4 | C11—O3—C1 | 110.30 (18) |
C13—C12—H12 | 108.4 | C6—O5—C7 | 60.87 (15) |
C10—C12—H12 | 108.4 | C8—O4—H4 | 109.5 |
N1—C13—C12 | 115.7 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4···O2i | 0.82 | 2.11 | 2.902 (3) | 161 |
C14—H14B···O5ii | 0.96 | 2.59 | 3.289 (3) | 129 |
C21—H21···O1iii | 0.93 | 2.51 | 3.441 (4) | 174 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) −x+2, y−1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | C25H34N2O5 |
Mr | 442.54 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 298 |
a, b, c (Å) | 7.7666 (5), 9.6059 (8), 31.181 (2) |
V (Å3) | 2326.2 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.45 × 0.36 × 0.28 |
Data collection | |
Diffractometer | Bruker X8 APEX CCD area-detector diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 10922, 2723, 2362 |
Rint | 0.024 |
(sin θ/λ)max (Å−1) | 0.625 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.104, 1.06 |
No. of reflections | 2723 |
No. of parameters | 293 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.17, −0.18 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SHELXS97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia,1997) and PLATON (Spek, 2009), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H4···O2i | 0.82 | 2.11 | 2.902 (3) | 161 |
C14—H14B···O5ii | 0.96 | 2.59 | 3.289 (3) | 129 |
C21—H21···O1iii | 0.93 | 2.51 | 3.441 (4) | 174 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y, z; (iii) −x+2, y−1/2, −z+3/2. |
Acknowledgements
The authors thank the Unit of Support for Technical and Scientific Research (UATRS, CNRST) for financial support.
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The natural sesquiterpene lactone, 9α - hydroxypartenolide is the main constituent of the chloroform extract of the aerial parts of Anvillea radiata (El Hassany et al., 2004) and of Anvillea garcini (Abdel Sattar et al., (1996). The reactivity of this sesquiterpene lactone and its derivatives has been the subject of several studies (Neukirch et al., 2003; Hwang et al., 2006; Neelakantan et al., 2009), in order to prepare products of value which can be used in the pharmacological industry. In this context, we have synthesed from 9α-hydroxyparthenolide the 6β,7α- epoxy-9apha hydoxy partenolide (9α-hydroxy-4,8-dimethyl-12- methylen-3,14-dioxa-tricyclo[9.3.0.02,4]tetradec-7-en-13-one) (Moumou et al., 2010) and then prepared the title compound (I). The crystal structure of (I) is determined herein. The molecule contains a fused ring system and phenylpiperazine group as a substituent to a lactone ring. The molecular structure, Fig.1, shows that the lactone ring adopts an envelope conformation, as indicated by the Cremer & Pople (1975) puckering parameters Q = 0.347 (2)Å and ϕ = 75.6 (3)°. The ten-membered ring displays an approximate chair-chair conformation, while the piperazine ring has a perfect chair conformation with QT = 0.570 (2) Å, θ = 180.0 (2)° and ϕ2 = 150 (10)°. In the crystal structure, molecules are connected through O—H···O hydrogen bonds (Fig.2), forming chains along [100].