Acta Cryst. (2008). E64, o738 [ doi:10.1107/S1600536808007460 ]
In the crystal structure of the title compound, C15H22O2, the cyclohexene and cyclohexane rings adopt half-boat and chair conformations, respectively, and the lactone ring is in an envelope conformation.
Drimys winteri was collected from the Estuary of Reloncaví, Xth° Región, Chile in November 2005. Two kilograms of bark was extracted in dichloromethane and concentrated by rotavapor to yield 180 g. 30 grams of crude extract was subjected to flash chromatography on Silicagel G, 70–200 mesh with hexane–ethyl-acetate mixtures of increasing polarity as elution solvents. Pure components were obtained by further chromatography on silicagel of the fraction 10% hexane–ethyl-acetate (11 g). Recrystallization from methanol,at room temperature afforded colourless crystals of drimenin (0.02 g) suitable for X-ray difracction analysis. NMR spectra (1H-RMN, 13C-RMN, DEPT and 1H-1H COSY) were obtained on a Bruker AC 250P multinuclear spectrometer, in DCCl3 with TMS as internal standard. Drimenin(C15H22O2); Colorless crystals, mp 95 - 97°C. 1H-RMN (250 MHz) δ(p.p.m.); 0.88(3H, s), 0.90 (3H, s), 0.92 (3H, s), 1.15–1.30 (2H, m), 1.35 (1H, dd, J=3.4, 5.0, 13 Hz), 2.77 (1H, br s), 4.65 (2H, m), 5.73 (1H, br s). 13C-RMN δ(p.p.m.) 175.3 (s); 121.1 (d); 129.8 (s); 69.8 (t); 53.6 (d); 49.6 (d); 42.3 (t); 38.4 (t); 34.3 (s); 33.0 (q); 31.1 (s); 23.3 (t); 21.4 (q); 18.3 (t); 13.9 (q).
The H atom bonded to C4 was found in difference maps and was freely refined. All other H atoms were positioned with idealized geometry (C—H = 0.96–0.98 Å) and were refined using a riding model, with Uiso(H) = 1.2Ueq(C) (1.5Ueq for methyl H atoms) of the carrier atom. In the absence of any significant anomalous scattering, Friedel equivalents were merged prior to the final refinements, and the absolute structure was not determined.
Data collection: COLLECT (Nonius, 1998); cell refinement: DENZO–SMN (Otwinowski & Minor, 1997); data reduction: DENZO–SMN (Otwinowski & Minor, 1997); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2003); software used to prepare material for publication: WinGX (Farrugia, 1999).
![[Figure 1]](./nc2094fig1thm.gif)
| Fig. 1. A view of the molecular structure of (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level and H atoms are shown as small spheres of arbitrary radii. |
| C15H22O2 | F000 = 512 |
| Mr = 234.33 | Dx = 1.154 Mg m−3 |
| Orthorhombic, P212121 | Mo Kα radiation λ = 0.71073 Å |
| Hall symbol: P 2ac 2ab | Cell parameters from 4453 reflections |
| a = 7.4031 (2) Å | θ = 2.7–27.5º |
| b = 7.9250 (2) Å | µ = 0.07 mm−1 |
| c = 22.9973 (8) Å | T = 298 (2) K |
| V = 1349.24 (7) Å3 | Prism, colourless |
| Z = 4 | 0.14 × 0.12 × 0.08 mm |
| Nonius KappaCCD area-detector diffractometer | 1645 reflections with I > 2σ(I) |
| Radiation source: fine-focus sealed tube | Rint = 0.066 |
| Monochromator: graphite | θmax = 27.5º |
| φ scans, and ω scans with κ offsets | θmin = 2.7º |
| Absorption correction: none | h = −9→9 |
| 4453 measured reflections | k = −10→10 |
| 1790 independent reflections | l = −29→29 |
| Refinement on F2 | H atoms treated by a mixture of independent and constrained refinement |
| Least-squares matrix: full | w = 1/[σ2(Fo2) + (0.0906P)2 + 0.1776P] where P = (Fo2 + 2Fc2)/3 |
| R[F2 > 2σ(F2)] = 0.061 | (Δ/σ)max = 0.001 |
| wR(F2) = 0.167 | Δρmax = 0.23 e Å−3 |
| S = 1.18 | Δρmin = −0.19 e Å−3 |
| 1790 reflections | Extinction correction: none |
| 163 parameters |
| C15H22O2 | V = 1349.24 (7) Å3 |
| Mr = 234.33 | Z = 4 |
| Orthorhombic, P212121 | Mo Kα |
| a = 7.4031 (2) Å | µ = 0.07 mm−1 |
| b = 7.9250 (2) Å | T = 298 (2) K |
| c = 22.9973 (8) Å | 0.14 × 0.12 × 0.08 mm |
| Nonius KappaCCD area-detector diffractometer | 1790 independent reflections |
| Absorption correction: none | 1645 reflections with I > 2σ(I) |
| 4453 measured reflections | Rint = 0.066 |
| R[F2 > 2σ(F2)] = 0.061 | Δρmax = 0.23 e Å−3 |
| wR(F2) = 0.167 | Δρmin = −0.19 e Å−3 |
| S = 1.18 | Absolute structure: ? |
| 1790 reflections | Flack parameter: ? |
| 163 parameters | Rogers parameter: ? |
| H atoms treated by a mixture of independent and constrained refinement |
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. |
| x | y | z | Uiso*/Ueq | ||
| O1 | 0.8222 (4) | 0.4735 (2) | 0.79867 (11) | 0.0726 (8) | |
| O2 | 0.6477 (3) | 0.2766 (3) | 0.76017 (10) | 0.0656 (7) | |
| C1 | 0.7967 (4) | 0.3267 (3) | 0.78912 (12) | 0.0513 (7) | |
| C3 | 0.6436 (5) | 0.0949 (4) | 0.75322 (14) | 0.0609 (8) | |
| H3A | 0.6714 | 0.0632 | 0.7135 | 0.077 (3)* | |
| H3B | 0.5261 | 0.0499 | 0.7635 | 0.077 (3)* | |
| C3A | 0.7862 (4) | 0.0326 (3) | 0.79414 (10) | 0.0427 (6) | |
| C4 | 0.7941 (4) | −0.1115 (3) | 0.82241 (13) | 0.0537 (7) | |
| H4 | 0.712 (4) | −0.196 (4) | 0.8180 (12) | 0.052 (8)* | |
| C5 | 0.9382 (5) | −0.1455 (4) | 0.86662 (14) | 0.0607 (8) | |
| H5A | 0.9938 | −0.2535 | 0.858 | 0.077 (3)* | |
| H5B | 0.8825 | −0.1539 | 0.9047 | 0.077 (3)* | |
| C5A | 1.0857 (4) | −0.0101 (3) | 0.86874 (10) | 0.0400 (5) | |
| H5A1 | 1.1546 | −0.0261 | 0.8328 | 0.077 (3)* | |
| C6 | 1.2257 (4) | −0.0397 (4) | 0.91848 (12) | 0.0533 (7) | |
| C7 | 1.3670 (4) | 0.1013 (5) | 0.91648 (15) | 0.0648 (8) | |
| H7A | 1.4451 | 0.0906 | 0.9501 | 0.077 (3)* | |
| H7B | 1.4411 | 0.086 | 0.8821 | 0.077 (3)* | |
| C8 | 1.2894 (5) | 0.2776 (5) | 0.91553 (17) | 0.0701 (9) | |
| H8A | 1.3868 | 0.3592 | 0.9131 | 0.077 (3)* | |
| H8B | 1.2234 | 0.2982 | 0.9513 | 0.077 (3)* | |
| C9 | 1.1637 (4) | 0.2991 (4) | 0.86386 (14) | 0.0573 (7) | |
| H9A | 1.2326 | 0.2857 | 0.8283 | 0.077 (3)* | |
| H9B | 1.1148 | 0.4126 | 0.8642 | 0.077 (3)* | |
| C9A | 1.0067 (3) | 0.1719 (3) | 0.86379 (10) | 0.0383 (5) | |
| C9B | 0.9142 (3) | 0.1759 (3) | 0.80383 (10) | 0.0391 (5) | |
| H9B1 | 1.009 | 0.1684 | 0.7742 | 0.077 (3)* | |
| C10 | 0.8694 (4) | 0.2156 (4) | 0.91074 (12) | 0.0587 (8) | |
| H10A | 0.9297 | 0.2262 | 0.9475 | 0.100 (5)* | |
| H10B | 0.7804 | 0.1278 | 0.9131 | 0.100 (5)* | |
| H10C | 0.8114 | 0.3204 | 0.9012 | 0.100 (5)* | |
| C11 | 1.1446 (6) | −0.0480 (6) | 0.97981 (13) | 0.0809 (11) | |
| H11A | 1.0476 | −0.1284 | 0.9804 | 0.100 (5)* | |
| H11B | 1.0992 | 0.0612 | 0.9905 | 0.100 (5)* | |
| H11C | 1.2361 | −0.0819 | 1.007 | 0.100 (5)* | |
| C12 | 1.3245 (6) | −0.2074 (5) | 0.90694 (18) | 0.0871 (12) | |
| H12A | 1.4199 | −0.2213 | 0.9348 | 0.100 (5)* | |
| H12B | 1.3744 | −0.2062 | 0.8684 | 0.100 (5)* | |
| H12C | 1.2406 | −0.2993 | 0.9104 | 0.100 (5)* |
| U11 | U22 | U33 | U12 | U13 | U23 | |
| O1 | 0.0919 (18) | 0.0321 (10) | 0.0938 (17) | 0.0012 (11) | −0.0179 (15) | −0.0003 (9) |
| O2 | 0.0735 (13) | 0.0419 (11) | 0.0814 (14) | 0.0128 (10) | −0.0286 (13) | −0.0048 (9) |
| C1 | 0.0645 (17) | 0.0336 (13) | 0.0558 (15) | 0.0033 (13) | −0.0039 (14) | −0.0002 (10) |
| C3 | 0.0734 (19) | 0.0432 (15) | 0.0660 (18) | 0.0044 (14) | −0.0219 (17) | −0.0077 (12) |
| C3A | 0.0499 (14) | 0.0330 (12) | 0.0450 (13) | 0.0001 (11) | −0.0071 (12) | −0.0062 (9) |
| C4 | 0.0597 (17) | 0.0348 (12) | 0.0667 (17) | −0.0153 (12) | −0.0151 (15) | −0.0006 (12) |
| C5 | 0.0749 (19) | 0.0385 (14) | 0.0686 (18) | −0.0126 (14) | −0.0193 (17) | 0.0144 (12) |
| C5A | 0.0446 (12) | 0.0372 (12) | 0.0384 (11) | −0.0012 (11) | −0.0037 (10) | 0.0012 (9) |
| C6 | 0.0537 (15) | 0.0590 (16) | 0.0473 (14) | 0.0056 (14) | −0.0096 (13) | 0.0042 (12) |
| C7 | 0.0441 (15) | 0.091 (2) | 0.0595 (17) | −0.0051 (16) | −0.0102 (15) | −0.0033 (16) |
| C8 | 0.0543 (16) | 0.072 (2) | 0.084 (2) | −0.0206 (16) | −0.0167 (17) | −0.0073 (17) |
| C9 | 0.0545 (16) | 0.0464 (15) | 0.0709 (17) | −0.0171 (14) | −0.0049 (15) | 0.0000 (13) |
| C9A | 0.0395 (11) | 0.0348 (11) | 0.0405 (11) | −0.0083 (10) | 0.0023 (10) | −0.0025 (9) |
| C9B | 0.0453 (12) | 0.0311 (11) | 0.0410 (11) | −0.0017 (11) | 0.0025 (10) | −0.0006 (9) |
| C10 | 0.0536 (15) | 0.075 (2) | 0.0476 (15) | 0.0070 (15) | 0.0044 (13) | −0.0152 (14) |
| C11 | 0.084 (2) | 0.112 (3) | 0.0464 (16) | −0.013 (3) | −0.0105 (17) | 0.0190 (17) |
| C12 | 0.094 (3) | 0.079 (2) | 0.088 (3) | 0.029 (2) | −0.040 (2) | −0.0022 (19) |
| O1—C1 | 1.199 (3) | C7—H7A | 0.97 |
| O2—C1 | 1.348 (4) | C7—H7B | 0.97 |
| O2—C3 | 1.449 (4) | C8—C9 | 1.519 (5) |
| C1—C9B | 1.516 (3) | C8—H8A | 0.97 |
| C3—C3A | 1.498 (4) | C8—H8B | 0.97 |
| C3—H3A | 0.97 | C9—C9A | 1.538 (3) |
| C3—H3B | 0.97 | C9—H9A | 0.97 |
| C3A—C4 | 1.315 (4) | C9—H9B | 0.97 |
| C3A—C9B | 1.496 (3) | C9A—C10 | 1.523 (4) |
| C4—C5 | 1.498 (4) | C9A—C9B | 1.540 (3) |
| C4—H4 | 0.91 (3) | C9B—H9B1 | 0.98 |
| C5—C5A | 1.532 (4) | C10—H10A | 0.96 |
| C5—H5A | 0.97 | C10—H10B | 0.96 |
| C5—H5B | 0.97 | C10—H10C | 0.96 |
| C5A—C9A | 1.560 (3) | C11—H11A | 0.96 |
| C5A—C6 | 1.561 (3) | C11—H11B | 0.96 |
| C5A—H5A1 | 0.98 | C11—H11C | 0.96 |
| C6—C7 | 1.531 (4) | C12—H12A | 0.96 |
| C6—C11 | 1.534 (4) | C12—H12B | 0.96 |
| C6—C12 | 1.540 (5) | C12—H12C | 0.96 |
| C7—C8 | 1.511 (5) | ||
| C1—O2—C3 | 111.4 (2) | C7—C8—H8A | 109.6 |
| O1—C1—O2 | 120.4 (3) | C9—C8—H8A | 109.6 |
| O1—C1—C9B | 129.3 (3) | C7—C8—H8B | 109.6 |
| O2—C1—C9B | 110.3 (2) | C9—C8—H8B | 109.6 |
| O2—C3—C3A | 104.1 (2) | H8A—C8—H8B | 108.1 |
| O2—C3—H3A | 110.9 | C8—C9—C9A | 113.0 (2) |
| C3A—C3—H3A | 110.9 | C8—C9—H9A | 109 |
| O2—C3—H3B | 110.9 | C9A—C9—H9A | 109 |
| C3A—C3—H3B | 110.9 | C8—C9—H9B | 109 |
| H3A—C3—H3B | 108.9 | C9A—C9—H9B | 109 |
| C4—C3A—C9B | 123.9 (2) | H9A—C9—H9B | 107.8 |
| C4—C3A—C3 | 128.9 (3) | C10—C9A—C9 | 110.8 (2) |
| C9B—C3A—C3 | 106.8 (2) | C10—C9A—C9B | 109.5 (2) |
| C3A—C4—C5 | 121.6 (2) | C9—C9A—C9B | 108.9 (2) |
| C3A—C4—H4 | 123.5 (19) | C10—C9A—C5A | 114.1 (2) |
| C5—C4—H4 | 114.9 (19) | C9—C9A—C5A | 108.8 (2) |
| C4—C5—C5A | 113.8 (2) | C9B—C9A—C5A | 104.53 (18) |
| C4—C5—H5A | 108.8 | C3A—C9B—C1 | 101.6 (2) |
| C5A—C5—H5A | 108.8 | C3A—C9B—C9A | 113.53 (19) |
| C4—C5—H5B | 108.8 | C1—C9B—C9A | 118.1 (2) |
| C5A—C5—H5B | 108.8 | C3A—C9B—H9B1 | 107.7 |
| H5A—C5—H5B | 107.7 | C1—C9B—H9B1 | 107.7 |
| C5—C5A—C9A | 112.2 (2) | C9A—C9B—H9B1 | 107.7 |
| C5—C5A—C6 | 113.0 (2) | C9A—C10—H10A | 109.5 |
| C9A—C5A—C6 | 116.2 (2) | C9A—C10—H10B | 109.5 |
| C5—C5A—H5A1 | 104.7 | H10A—C10—H10B | 109.5 |
| C9A—C5A—H5A1 | 104.7 | C9A—C10—H10C | 109.5 |
| C6—C5A—H5A1 | 104.7 | H10A—C10—H10C | 109.5 |
| C7—C6—C11 | 109.1 (3) | H10B—C10—H10C | 109.5 |
| C7—C6—C12 | 107.5 (3) | C6—C11—H11A | 109.5 |
| C11—C6—C12 | 107.9 (3) | C6—C11—H11B | 109.5 |
| C7—C6—C5A | 108.8 (2) | H11A—C11—H11B | 109.5 |
| C11—C6—C5A | 114.8 (3) | C6—C11—H11C | 109.5 |
| C12—C6—C5A | 108.6 (2) | H11A—C11—H11C | 109.5 |
| C8—C7—C6 | 114.5 (2) | H11B—C11—H11C | 109.5 |
| C8—C7—H7A | 108.6 | C6—C12—H12A | 109.5 |
| C6—C7—H7A | 108.6 | C6—C12—H12B | 109.5 |
| C8—C7—H7B | 108.6 | H12A—C12—H12B | 109.5 |
| C6—C7—H7B | 108.6 | C6—C12—H12C | 109.5 |
| H7A—C7—H7B | 107.6 | H12A—C12—H12C | 109.5 |
| C7—C8—C9 | 110.4 (3) | H12B—C12—H12C | 109.5 |
| C3—O2—C1—O1 | 179.8 (3) | C8—C9—C9A—C9B | −167.1 (3) |
| C3—O2—C1—C9B | 1.3 (3) | C8—C9—C9A—C5A | −53.7 (3) |
| C1—O2—C3—C3A | 13.5 (4) | C5—C5A—C9A—C10 | 57.9 (3) |
| O2—C3—C3A—C4 | 150.1 (3) | C6—C5A—C9A—C10 | −74.3 (3) |
| O2—C3—C3A—C9B | −23.0 (3) | C5—C5A—C9A—C9 | −177.8 (2) |
| C9B—C3A—C4—C5 | −1.5 (5) | C6—C5A—C9A—C9 | 50.0 (3) |
| C3—C3A—C4—C5 | −173.5 (3) | C5—C5A—C9A—C9B | −61.6 (3) |
| C3A—C4—C5—C5A | −8.2 (4) | C6—C5A—C9A—C9B | 166.2 (2) |
| C4—C5—C5A—C9A | 41.4 (3) | C4—C3A—C9B—C1 | −150.4 (3) |
| C4—C5—C5A—C6 | 175.2 (3) | C3—C3A—C9B—C1 | 23.0 (3) |
| C5—C5A—C6—C7 | 179.6 (3) | C4—C3A—C9B—C9A | −22.6 (4) |
| C9A—C5A—C6—C7 | −48.5 (3) | C3—C3A—C9B—C9A | 150.9 (2) |
| C5—C5A—C6—C11 | −57.9 (4) | O1—C1—C9B—C3A | 166.3 (3) |
| C9A—C5A—C6—C11 | 74.0 (3) | O2—C1—C9B—C3A | −15.4 (3) |
| C5—C5A—C6—C12 | 63.0 (3) | O1—C1—C9B—C9A | 41.4 (4) |
| C9A—C5A—C6—C12 | −165.2 (3) | O2—C1—C9B—C9A | −140.3 (2) |
| C11—C6—C7—C8 | −74.4 (3) | C10—C9A—C9B—C3A | −71.3 (3) |
| C12—C6—C7—C8 | 168.9 (3) | C9—C9A—C9B—C3A | 167.5 (2) |
| C5A—C6—C7—C8 | 51.5 (3) | C5A—C9A—C9B—C3A | 51.4 (3) |
| C6—C7—C8—C9 | −57.5 (4) | C10—C9A—C9B—C1 | 47.6 (3) |
| C7—C8—C9—C9A | 58.3 (4) | C9—C9A—C9B—C1 | −73.7 (3) |
| C8—C9—C9A—C10 | 72.5 (3) | C5A—C9A—C9B—C1 | 170.2 (2) |
We thank the Spanish Research Council (CSIC) for providing us with a free-of-charge licence for the Cambridge Structural Database. MZ recognizes support provided by the Center for Ecosystem Research in Patagonia (CIEP), under grant 205.023.040-1SP.
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Drimys winteri J.R. Forst is a plant used in folk medicine of many Latinoamerican countries. In Chile, Drimys winteri (canelo) is used by the indigenous Mapuche in the treatment of several stomachal diseases, ulcers and hemorrhages (Almeida et al., 2001). Chemical studies has shown the presence of a variety of sesquiterpenes with drimano skeleton (Appel et al., 1963) and flavonoids. Some of these compounds have shown significant antibacterial, antifungi, antitumor and insecticide properties (Cruz et al., 1973; Sierra et al., 1986). The extract of Drimys winteri leaves afforded Cinnamolide and Drimenin two lactones with drimano skeleton. The title compound (I) is a positional isomer of Cinnamolide [IUPAC name: 6,6,9a-trimethyl-5,5a,6,7,8,9,9a,9 b-octahydronaphtho [1,2-c]furan-3(1H)-one] (CSD refcode NIDJUG; Harinantenaina et al., 2007).In order to ascertain the structure and secure the assignment of the stereochemistry of (I) an X-ray analysis was performed but the absolute configuration was not determined by this analysis. The structure consists of a drimane skeleton and the methyl group at C9a is α -oriented. The cyclohexene ring (A) and cyclohexane ring (B) is in a half-boat and a chair conformation, respectively [QT = 0.526 (3) Å φ2 = 316.5 (4) °, q2 = 0.413 (3)Å for ring A; QT = 0.545 (3) Å, φ2 = 160 (4)°, q2 = 0.052 (4) Å for ring B], and the lactone ring is in an envelope conformation [q2=0.233 (3) Å, φ2 = 284.5 (7)°] (Cremer & Pople, 1975). The A and B rings are trans-fused.