organic compounds
(−)-(1S,5R)-2-Oxabicyclo[3.3.1]nonan-3-one
aDepartment of Chemistry, Wrocław University of Environmental and Life Sciences, 25. Norwida, 50-375 Wrocław, Poland, and bFaculty of Chemistry, University of Wrocław, 14. F. Joliot-Curie, 50-383 Wrocław, Poland
*Correspondence e-mail: bialonsk@eto.wchuwr.pl
In the title compound, C8H12O2, the cyclohexane ring exhibits a chair conformation and the δ-lactone ring is axially bonded to the cyclohexane ring. In the crystal, molecules are linked by C—H⋯O hydrogen bonds, resulting in ribbons extending along [010].
Related literature
For the synthesis and confirmation of the ); Wascholowski et al. (2008); Tzvetkov et al. (2006); Xu et al. (2002). For related structures see: Yokoyama et al. (2003); Schmidt et al. (1998); Finet et al. (2007); Militsina et al. (2005).
of the title compound, see Olejniczak (2010Experimental
Crystal data
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Data collection
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Refinement
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Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP (Bruker, 1999); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810014339/hg2667sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810014339/hg2667Isup2.hkl
Crystals suitable for X-ray structure analysis were obtained directly after purification by
by slow evaporation of the (petroleum ether : aceton : iso-propanol : ethyl acetate (40:1:3:1) v/v) at room temperature.All H atoms were placed at calculated positions and were treated as riding atoms, with C—H distances of 0.99 - 1.00 Å. The
of (-)-3 was choosen on the basis of known of particular substrates: The of (-)-1 was confirmed by comparison of its with the literature data [Wascholowski et al., 2008; Tzvetkov et al., 2006; Xu et al., 2002]. The of the carbon atom bearing hydroxyl group in product (+)-2 was determined using the Mosher's ester [Olejniczak, 2010].The titled compound, C8H12O2, was prepared in a three step synthesis (Fig. 2). Racemic diethyl 2-(3-oxocyclohexyl)malonate (1) was synthesized as a product of Michael addition of diethyl malonate to cyclohex-2-en-1-one. (-)-Diethyl 2-((S)-3-oxocyclohexyl)malonate ((-)-1) (ee=98%) and (+)-diethyl 2-((1R, 3R)-3-hydroxycyclohexyl)malonate ((+)-2) (ee=99%) were isolated by micriobial bioreduction using Absidia coerulea AM 93. Hydroxydiester-(+)-2 was subjected to chemical lactonization, leading to (-)-(1S, 5R)-2-oxabicyclo[3.3.1]nonan-3-one ((-)-3) [for more details see Olejniczak, 2010].
The molecular structure of the title compound is shown in Fig. 1. Bond lengths and angles in (-)-3 are similar to those observed in related structures [Yokoyama et al., 2003; Schmidt et al., 1998; Finet et al., 2007]. As in these related structures, in (-)-3 the cyclohexane ring reveals chair conformation (Fig. 1) and the δ-lactone ring is axially bonded to the cyclohexane ring.
It is worth mentioning that the conformation of the δ-lactone ring differs a little from those observed in the related structures. According to the numbering scheme employed in this paper, the torsion angles C1 O2 C3 C4 and O2 C3 C4 C5 in the related structures are in the range -7.1 - 0.4 ° and 0.0 - 8.8 °, respectively, and in (-)-3 values of suitable torsion angles are equal to -18.1 (3) and 23.3 (4) °. However, the values of the torsion angles are similar to those, -17.5 and 25.5 °, observed in one of crystallographically unrelated molecules of 3,9,12a-trimethyl-5-oxotetradecahydro-3,6a- methanonaphtho[2,1-d]oxocine-9-carboxylic acid, in which δ-lactone ring axially bonded to cyclohexane ring is observed [Militsina et al., 2005].
The structure of (-)-3 is stabilized by weak intermolecular C—H···O hydrogen bonds and van der Waals contacts. Molecules of (-)-3 are linked by the C1—H1···O2(2-x, 0.5+y, 0.5-z) hydrogen bonds, resulting in ribbons extended along the [010] direction (Table 1, Fig. 3).
For the synthesis and conformation of the
of the title compound, see Olejniczak (2010); Wascholowski et al. (2008); Tzvetkov et al. (2006); Xu et al. (2002). For related structures see: Yokoyama et al. (2003); Schmidt et al. (1998); Finet et al. (2007); Militsina et al., (2005).Data collection: CrysAlis CCD (Oxford Diffraction, 2009); cell
CrysAlis RED (Oxford Diffraction, 2009); data reduction: CrysAlis RED (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP (Bruker, 1999); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. Selected view of (-)-3 (30% probability thermal ellipsoids). | |
Fig. 2. Scheme of a three step synthesis of (-)-3. | |
Fig. 3. Packing of (-)-3. |
C8H12O2 | F(000) = 304 |
Mr = 140.18 | Dx = 1.295 Mg m−3 |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2ac 2ab | Cell parameters from 1754 reflections |
a = 6.793 (2) Å | θ = 3.0–28.8° |
b = 7.467 (2) Å | µ = 0.09 mm−1 |
c = 14.170 (4) Å | T = 100 K |
V = 718.7 (4) Å3 | Needle, colorless |
Z = 4 | 0.30 × 0.14 × 0.10 mm |
Kuma KM-4-CCD diffractometer | 685 reflections with I > 2σ(I) |
Radiation source: fine-focus sealed tube | Rint = 0.051 |
Graphite monochromator | θmax = 27.0°, θmin = 3.1° |
ω scan | h = −8→8 |
4925 measured reflections | k = −9→9 |
935 independent reflections | l = −15→18 |
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)] = 0.043 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.096 | H-atom parameters constrained |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0507P)2] where P = (Fo2 + 2Fc2)/3 |
935 reflections | (Δ/σ)max = 0.004 |
92 parameters | Δρmax = 0.35 e Å−3 |
0 restraints | Δρmin = −0.16 e Å−3 |
C8H12O2 | V = 718.7 (4) Å3 |
Mr = 140.18 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 6.793 (2) Å | µ = 0.09 mm−1 |
b = 7.467 (2) Å | T = 100 K |
c = 14.170 (4) Å | 0.30 × 0.14 × 0.10 mm |
Kuma KM-4-CCD diffractometer | 685 reflections with I > 2σ(I) |
4925 measured reflections | Rint = 0.051 |
935 independent reflections |
R[F2 > 2σ(F2)] = 0.043 | 0 restraints |
wR(F2) = 0.096 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.35 e Å−3 |
935 reflections | Δρmin = −0.16 e Å−3 |
92 parameters |
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 > 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 | ||
C1 | 0.9078 (4) | 0.4787 (3) | 0.29810 (17) | 0.0293 (6) | |
H1 | 1.0256 | 0.4916 | 0.2564 | 0.035* | |
O2 | 0.8893 (3) | 0.2882 (2) | 0.32719 (12) | 0.0331 (5) | |
C3 | 0.7920 (4) | 0.2414 (4) | 0.40668 (17) | 0.0302 (6) | |
O3 | 0.7539 (3) | 0.0838 (2) | 0.41770 (13) | 0.0389 (5) | |
C4 | 0.7539 (4) | 0.3815 (3) | 0.48057 (18) | 0.0300 (6) | |
H4A | 0.8553 | 0.3693 | 0.5304 | 0.036* | |
H4B | 0.6247 | 0.3561 | 0.5100 | 0.036* | |
C5 | 0.7535 (4) | 0.5754 (3) | 0.44672 (17) | 0.0287 (6) | |
H5 | 0.7674 | 0.6561 | 0.5027 | 0.034* | |
C6 | 0.5660 (4) | 0.6256 (4) | 0.39356 (19) | 0.0347 (7) | |
H6B | 0.4509 | 0.6041 | 0.4349 | 0.042* | |
H6A | 0.5695 | 0.7549 | 0.3782 | 0.042* | |
C7 | 0.5413 (4) | 0.5192 (4) | 0.30310 (17) | 0.0344 (7) | |
H7B | 0.4290 | 0.5683 | 0.2669 | 0.041* | |
H7A | 0.5108 | 0.3931 | 0.3189 | 0.041* | |
C8 | 0.7258 (4) | 0.5254 (4) | 0.24230 (17) | 0.0334 (6) | |
H8B | 0.7115 | 0.4402 | 0.1892 | 0.040* | |
H8A | 0.7407 | 0.6471 | 0.2155 | 0.040* | |
C9 | 0.9334 (4) | 0.5985 (4) | 0.38359 (19) | 0.0302 (7) | |
H9B | 0.9457 | 0.7250 | 0.3635 | 0.036* | |
H9A | 1.0542 | 0.5648 | 0.4184 | 0.036* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0333 (15) | 0.0256 (14) | 0.0290 (14) | 0.0004 (12) | 0.0060 (13) | 0.0044 (12) |
O2 | 0.0360 (11) | 0.0311 (10) | 0.0322 (10) | 0.0031 (8) | 0.0082 (9) | −0.0003 (9) |
C3 | 0.0285 (15) | 0.0334 (16) | 0.0286 (14) | 0.0022 (12) | −0.0040 (12) | 0.0043 (12) |
O3 | 0.0434 (11) | 0.0284 (10) | 0.0451 (11) | −0.0025 (10) | −0.0047 (11) | 0.0059 (9) |
C4 | 0.0245 (14) | 0.0393 (15) | 0.0261 (12) | −0.0021 (14) | 0.0014 (13) | 0.0003 (11) |
C5 | 0.0291 (14) | 0.0297 (14) | 0.0273 (13) | −0.0034 (13) | −0.0009 (13) | −0.0068 (11) |
C6 | 0.0268 (15) | 0.0336 (16) | 0.0435 (17) | 0.0048 (12) | 0.0036 (13) | −0.0038 (13) |
C7 | 0.0284 (14) | 0.0368 (16) | 0.0381 (17) | −0.0040 (12) | −0.0047 (12) | 0.0040 (14) |
C8 | 0.0429 (17) | 0.0314 (14) | 0.0259 (13) | −0.0055 (14) | −0.0033 (13) | 0.0012 (11) |
C9 | 0.0242 (14) | 0.0312 (15) | 0.0353 (16) | −0.0039 (12) | −0.0012 (12) | 0.0037 (12) |
C1—O2 | 1.486 (3) | C5—H5 | 1.0000 |
C1—C8 | 1.509 (3) | C6—C7 | 1.517 (4) |
C1—C9 | 1.516 (4) | C6—H6B | 0.9900 |
C1—H1 | 1.0000 | C6—H6A | 0.9900 |
O2—C3 | 1.352 (3) | C7—C8 | 1.522 (3) |
C3—O3 | 1.215 (3) | C7—H7B | 0.9900 |
C3—C4 | 1.502 (4) | C7—H7A | 0.9900 |
C4—C5 | 1.526 (3) | C8—H8B | 0.9900 |
C4—H4A | 0.9900 | C8—H8A | 0.9900 |
C4—H4B | 0.9900 | C9—H9B | 0.9900 |
C5—C9 | 1.524 (3) | C9—H9A | 0.9900 |
C5—C6 | 1.526 (4) | ||
O2—C1—C8 | 107.3 (2) | C7—C6—H6B | 109.1 |
O2—C1—C9 | 110.7 (2) | C5—C6—H6B | 109.1 |
C8—C1—C9 | 112.1 (2) | C7—C6—H6A | 109.1 |
O2—C1—H1 | 108.9 | C5—C6—H6A | 109.1 |
C8—C1—H1 | 108.9 | H6B—C6—H6A | 107.9 |
C9—C1—H1 | 108.9 | C6—C7—C8 | 111.8 (2) |
C3—O2—C1 | 121.32 (19) | C6—C7—H7B | 109.3 |
O3—C3—O2 | 117.5 (2) | C8—C7—H7B | 109.3 |
O3—C3—C4 | 123.2 (2) | C6—C7—H7A | 109.3 |
O2—C3—C4 | 119.0 (2) | C8—C7—H7A | 109.3 |
C3—C4—C5 | 116.2 (2) | H7B—C7—H7A | 107.9 |
C3—C4—H4A | 108.2 | C1—C8—C7 | 111.8 (2) |
C5—C4—H4A | 108.2 | C1—C8—H8B | 109.3 |
C3—C4—H4B | 108.2 | C7—C8—H8B | 109.3 |
C5—C4—H4B | 108.2 | C1—C8—H8A | 109.3 |
H4A—C4—H4B | 107.4 | C7—C8—H8A | 109.3 |
C9—C5—C4 | 106.9 (2) | H8B—C8—H8A | 107.9 |
C9—C5—C6 | 110.59 (19) | C1—C9—C5 | 108.1 (2) |
C4—C5—C6 | 112.9 (2) | C1—C9—H9B | 110.1 |
C9—C5—H5 | 108.8 | C5—C9—H9B | 110.1 |
C4—C5—H5 | 108.8 | C1—C9—H9A | 110.1 |
C6—C5—H5 | 108.8 | C5—C9—H9A | 110.1 |
C7—C6—C5 | 112.4 (2) | H9B—C9—H9A | 108.4 |
C8—C1—O2—C3 | −85.9 (3) | C4—C5—C6—C7 | −63.5 (3) |
C9—C1—O2—C3 | 36.8 (3) | C5—C6—C7—C8 | −50.9 (3) |
C1—O2—C3—O3 | 167.8 (2) | O2—C1—C8—C7 | 65.6 (3) |
C1—O2—C3—C4 | −18.1 (3) | C9—C1—C8—C7 | −56.1 (3) |
O3—C3—C4—C5 | −162.9 (3) | C6—C7—C8—C1 | 50.3 (3) |
O2—C3—C4—C5 | 23.3 (4) | O2—C1—C9—C5 | −59.8 (3) |
C3—C4—C5—C9 | −46.0 (3) | C8—C1—C9—C5 | 60.0 (3) |
C3—C4—C5—C6 | 75.9 (3) | C4—C5—C9—C1 | 64.0 (2) |
C9—C5—C6—C7 | 56.2 (3) | C6—C5—C9—C1 | −59.3 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···O2i | 1.00 | 2.58 | 3.224 (3) | 122 |
Symmetry code: (i) −x+2, y+1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C8H12O2 |
Mr | 140.18 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 100 |
a, b, c (Å) | 6.793 (2), 7.467 (2), 14.170 (4) |
V (Å3) | 718.7 (4) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.14 × 0.10 |
Data collection | |
Diffractometer | Kuma KM-4-CCD |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 4925, 935, 685 |
Rint | 0.051 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.043, 0.096, 1.04 |
No. of reflections | 935 |
No. of parameters | 92 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.16 |
Computer programs: CrysAlis CCD (Oxford Diffraction, 2009), CrysAlis RED (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP (Bruker, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
C1—H1···O2i | 1.00 | 2.58 | 3.224 (3) | 122 |
Symmetry code: (i) −x+2, y+1/2, −z+1/2. |
Acknowledgements
This work was supported by the Polish State Committee for Scientific Research, grant No. 2200/B/P01/2007/33.
References
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The titled compound, C8H12O2, was prepared in a three step synthesis (Fig. 2). Racemic diethyl 2-(3-oxocyclohexyl)malonate (1) was synthesized as a product of Michael addition of diethyl malonate to cyclohex-2-en-1-one. (-)-Diethyl 2-((S)-3-oxocyclohexyl)malonate ((-)-1) (ee=98%) and (+)-diethyl 2-((1R, 3R)-3-hydroxycyclohexyl)malonate ((+)-2) (ee=99%) were isolated by micriobial bioreduction using Absidia coerulea AM 93. Hydroxydiester-(+)-2 was subjected to chemical lactonization, leading to (-)-(1S, 5R)-2-oxabicyclo[3.3.1]nonan-3-one ((-)-3) [for more details see Olejniczak, 2010].
The molecular structure of the title compound is shown in Fig. 1. Bond lengths and angles in (-)-3 are similar to those observed in related structures [Yokoyama et al., 2003; Schmidt et al., 1998; Finet et al., 2007]. As in these related structures, in (-)-3 the cyclohexane ring reveals chair conformation (Fig. 1) and the δ-lactone ring is axially bonded to the cyclohexane ring.
It is worth mentioning that the conformation of the δ-lactone ring differs a little from those observed in the related structures. According to the numbering scheme employed in this paper, the torsion angles C1 O2 C3 C4 and O2 C3 C4 C5 in the related structures are in the range -7.1 - 0.4 ° and 0.0 - 8.8 °, respectively, and in (-)-3 values of suitable torsion angles are equal to -18.1 (3) and 23.3 (4) °. However, the values of the torsion angles are similar to those, -17.5 and 25.5 °, observed in one of crystallographically unrelated molecules of 3,9,12a-trimethyl-5-oxotetradecahydro-3,6a- methanonaphtho[2,1-d]oxocine-9-carboxylic acid, in which δ-lactone ring axially bonded to cyclohexane ring is observed [Militsina et al., 2005].
The structure of (-)-3 is stabilized by weak intermolecular C—H···O hydrogen bonds and van der Waals contacts. Molecules of (-)-3 are linked by the C1—H1···O2(2-x, 0.5+y, 0.5-z) hydrogen bonds, resulting in ribbons extended along the [010] direction (Table 1, Fig. 3).