research communications\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 71| Part 2| February 2015| Pages 184-187

Mol­ecular and crystal structure of gossypol tetra­methyl ether with an unknown solvate

aInstitute of Bioorganic Chemistry, Mirzo-Ulughbek Str. 83, Tashkent, 100125, Uzbekistan
*Correspondence e-mail: mturgunovna@mail.ru

Edited by V. V. Chernyshev, Moscow State University, Russia (Received 22 December 2014; accepted 6 January 2015; online 21 January 2015)

The title compound, C34H38O8 (systematic name: 5,5′-diisopropyl-2,2′,3,3′-tetra­meth­oxy-7,7′-dimethyl-2H,2′H-8,8′-bi­[naphtho­[1,8-bc]furan]-4,4′-diol), has been obtained from a gossypol solution in a mixture of dimethyl sulfate and methanol. The mol­ecule is situated on a twofold rotation axis, so the asymmetric unit contains one half-mol­ecule. In the mol­ecule, the hy­droxy groups are involved in intra­molecular O—H⋯O hydrogen bonds, and the two naphthyl fragments are inclined each to other by 83.8 (1)°. In the crystal, weak C—H⋯O and C—H⋯π inter­actions consolidate the packing, which exhibits channels with an approximate diameter of 6 Å extending along the c-axis direction. These channels are filled with highly disordered solvent mol­ecules, so their estimated scattering contribution was subtracted from the observed diffraction data using the SQUEEZE option in PLATON [Spek, A. L. (2015). Acta Cryst. C71, 9–18].

1. Chemical context

Gossypol [systematic name: 2,2′-bis­(8-formyl-1,6,7-tri­hydroxyl-5-isopropyl-3-methyl­naphthalene)] is an unique terpenoid found in Gossypium (cotton) and related species. Within plants, gossypol appears to act as a natural insecticide and fungicide (Adams et al., 1960[Adams, R., Geissman, T. A. & Edwards, J. D. (1960). Chem. Rev. 60, 555-574.]). Because of its anti­nutritive effect, gossypol limits the feeding of cottonseed and cottonseed meal to ruminant animals. However, the compound also has a wide range of biological actions, including anti-HIV, anti­cancer, and anti­fertility effects (Liang et al., 1995[Liang, X. S., Rogers, A. J., Webber, C. L., Ormsby, T. J., Tiritan, M. E., Matlin, S. A. & Benz, C. C. (1995). Invest. New Drugs, 13, 181-186.]; Dorsett et al., 1975[Dorsett, P. H., Kerstine, E. E. & Powers, L. J. (1975). J. Pharm. Sci. 64, 1073-1075.]; Coutinho, 2002[Coutinho, E. M. (2002). Contraception, 65, 259-263.]; Royer et al., 1995[Royer, R. E., Deck, L. M., Vander Jagt, T. J., Martinez, F. J., Mills, R. G., Young, S. A. & Vander Jagt, D. L. (1995). J. Med. Chem. 38, 2427-2432.]). Gossypol is a surprisingly versatile host compound that forms inclusion complexes with a great variety of organic substances such as ketones, ethers, esters, organic and mineral acids, water, various benzyl compounds and chlorinated and brominated compounds. More than one hundred of these complexes with different guest mol­ecules have been obtained and structurally characterized (Talipov et al., 2002[Talipov, S. A., Ibragimov, B. T., Ohashi, Y., Harada, J. & Saleh, M. I. (2002). Crystallogr. Rep. 47, 443-448.]; 2003[Talipov, S. A., Tadjimukhamedov, F. K., Hulliger, J., Ibragimov, B. T. & Yuldashev, A. (2003). Cryst. Eng. 6, 137-144.]; 2007[Talipov, S. A., Ibragimov, B. T., Tadjimukhamedov, F. Kh., Tiljakov, Z. G., Blake, A. J., Hertzsch, T. & Hulliger, J. (2007). J. Incl. Phenom. Macrocycl. Chem. 59, 287-292.]; Ibragimov et al., 2004[Ibragimov, B. T. & Talipov, S. A. (2004). Encyclopedia of Supramolecular Chemistry, edited by J. L. Atwood & J. W. Steed, pp. 606-614. New York: Dekker.]). A specific feature of gossypol is the existence of gossypol host–guest complexes in the form of polymorphic crystals. As a result of its comprehensive biological properties, there is current inter­est in the synthesis of new gossypol derivatives. Many derivatives have been reported, including ethers, acetates and Schiff bases with aldehydes (Talipov et al., 2004[Talipov, S. A., Ibragimov, B. T., Beketov, K. M., Praliev, D. K. & Aripov, T. F. (2004). Crystallogr. Rep. 49, 752-757.]; 2009[Talipov, S. A., Mamadrakhimov, A. A., Tiljakov, Z. G., Dowd, M. K., Ibragimov, B. T. & Xonkeldieva, M. T. (2009). J. Am. Oil Chem. Soc. 86, 207-213.]; Tilyabaev et al., 2009[Tilyabaev, K. Z., Talipov, S. A., Ibragimov, B. T., Dowd, M. K. & Yuldashev, A. M. (2009). J. Chem. Crystallogr. 39, 677-682.]; Kenar, 2006[Kenar, J. A. (2006). J Amer Oil Chem Soc, 83, 269-302.]). As first reported by Morris & Adams (1937[Morris, R. C. & Adams, R. (1937). J. Am. Chem. Soc. 59, 1731-1735.]), treatment with an alkali of a gossypol solution in a mixture of dimethyl sulfate and methanol, yields a white gossypol tetra­methyl ether, the title compound.

[Scheme 1]

2. Structural commentary

Gossypol can exist in one of the following tautomeric forms: aldehyde, quinoid and lactol (Adams et al., 1960[Adams, R., Geissman, T. A. & Edwards, J. D. (1960). Chem. Rev. 60, 555-574.]). In most solvents it is found in the aldehyde form. However, there are some reports that gossypol also exists in a pure lactol form (Reyes et al., 1986[Reyes, J., Wyrick, S. D., Borriero, L. & Benos, D. J. (1986). Biochim. Biophys. Acta, 863, 101-109.]) or as a dynamic equilibrium mixture of the aldehyde and lactol forms in some highly polar solvents (Kamaev et al., 1979[Kamaev, F. G., Baram, N. I., Ismailov, A. I., Leont'ev, V. B. & Sadykov, A. S. (1979). Russ. Chem. Bull. 28, 938-944.]). In the structure described here, the title compound exists in the lactol form.

The crystallographically imposed symmetry of the title mol­ecule is C2; the twofold axis is perpendicular to the C2—C2A bond [symmetry code (A): −x, y, [{3\over 2}] − z]. The symmetry of the mol­ecule corresponds to symmetry of the crystal, the title compound mol­ecule being situated on a twofold axis. An ORTEP diagram of the mol­ecule showing the atom-numbering scheme is given in Fig. 1[link]. The mol­ecule consists of two fused ring systems, each containing a naphthalene ring system with a fused furan ring. The two napthyl bicycles of the mol­ecule are nearly perpendicular and the dihedral angle between their least-squares planes is 83.8 (1)°. The furan ring is not completely planar, with atom C12 deviating from the C1/O1/C8/C9 plane by 0.225 (4) Å. The meth­oxy group at the C-7 position is almost coplanar with the plane of the naphthalene ring system; atomic deviations from this plane are 0.004 (3) for O3 and 0.163 (5) Å for C16. The meth­oxy group on the furan ring (C12-O2-C17H3) and atom O1 are located on the same side of the host ring (C1–C4/C9/C10). The isopropyl groups are positioned with the ternary hydrogen atoms pointed outwards and away from the center of the mol­ecule, the isopropyl groups bis­ect the extended naphthalene ring system plane.

[Figure 1]
Figure 1
The mol­ecular structure of the title compound showing the atomic numbering and 50% probability displacement ellipsoids. Unlabeled atoms are related to labeled ones by the symmetry operation (A) −x, y, [{3\over 2}] − z.

There is an intra­molecular O4—H4⋯O3 hydrogen bond (Table 1[link]) which is similar to those observed previously in structures of gossypol and its Schiff bases. The values of the bond lengths and angles in the title mol­ecule are within expected values. However, there are notable differences in the lengths of some of these bonds compared with typical values for gossypol structures. Compared with the relatively short C5—C6 aromatic ring bonds of gossypol mol­ecules (1.36 Å), the corresponding bond in the title mol­ecule is longer at 1.380 (3) Å. In addition, the C7—C8 and C8—C9 bonds in the title compound are shorter than those in gossypol by 0.03 and 0.06 Å, respectively. The shortest bond within these rings is the C1–C2 bond with a length of 1.359 (3) Å. In the furan ring, there are some differences in the lengths of some bonds compared with the values found in dianhydro­gossypol. In the title mol­ecule, the C1—O1 bond [1.374 (3) Å] is shorter than the O1—C12 bond [1.463 (3) Å].

Table 1
Hydrogen-bond geometry (Å, °)

Cg is the centroid of the C1–C4/C9/C10 ring.

D—H⋯A D—H H⋯A DA D—H⋯A
O4—H4⋯O3 0.67 (3) 2.17 (4) 2.586 (3) 122 (4)
C17—H17A⋯O1i 0.96 2.71 3.286 (3) 119
C17—H17CCgii 0.96 2.77 3.551 (4) 139
Symmetry codes: (i) -x, -y, -z+2; (ii) [x, -y, z+{\script{1\over 2}}].

3. Supra­molecular features

The packing of the title mol­ecules is shown in Fig. 2[link]. Weak inter­molecular C—H⋯O and C—H⋯π inter­actions (Table 1[link]) consolidate the crystal packing, which exhibits channels with a diameter of approximately 6 Å extending along the c-axis direction. These channels are similar to the channels previously reported in a dianhydro­gossypol crystal structure (Talipov et al., 2009[Talipov, S. A., Mamadrakhimov, A. A., Tiljakov, Z. G., Dowd, M. K., Ibragimov, B. T. & Xonkeldieva, M. T. (2009). J. Am. Oil Chem. Soc. 86, 207-213.]). In the present structure, for each unit cell, the channels provide a void volume of 672 Å3 corres­ponding to 19% of the unit-cell volume. Highly disordered solvent mol­ecules, most probably water mol­ecules, occupy these voids in the crystal; their contribution to the scattering was removed with the SQUEEZE routine of the PLATON program (Spek, 2009[Spek, A. L. (2009). Acta Cryst. D65, 148-155.], 2015[Spek, A. L. (2015). Acta Cryst. C71, 9-18.]).

[Figure 2]
Figure 2
A portion of the crystal packing viewed approximately along the c axis.

4. Database survey

A search in the Cambridge Structural Database (Version 5.33, last update November 2013; Groom & Allen, 2014[Groom, C. R. & Allen, F. H. (2014). Angew. Chem. Int. Ed. 53, 662-671.]) indicated the presence of 191 entries for gossypol (137 entries) or gossypol derivatives. However, only four entries were found for fused-ring systems containing a naphthalene ring system with a fused furan ring. The dihedral angle between two fused ring systems in these structures is equal to 84.8 in TEYJEM (Ibragimov et al., 1995[Ibragimov, B. T., Beketov, K. M., Talipov, S. A. & Mardanov, R. G. (1995). Chem. Nat. Compd, 31, 575-578.]), 111.8 in TEYJEN (Ibragimov et al., 1995[Ibragimov, B. T., Beketov, K. M., Talipov, S. A. & Mardanov, R. G. (1995). Chem. Nat. Compd, 31, 575-578.]), 117.0 in YURMEE (Talipov et al., 1999[Talipov, S. A., Mardanov, R. G., Ibragimov, B. T., Beketov, K. M. & Kholbekov, O. Kh. (1999). Chem. Nat. Compd, 35, 409-414.]) and 119.1° in FOVKEG (Talipov et al., 1999[Talipov, S. A., Mardanov, R. G., Ibragimov, B. T., Beketov, K. M. & Kholbekov, O. Kh. (1999). Chem. Nat. Compd, 35, 409-414.]).

5. Synthesis and crystallization

Gossypol was obtained from the Experimental Plant of the Institute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan where it was produced from by-products of the cottonseed oil industry. The title compound was synthesized following the known procedure (Morris & Adams, 1937[Morris, R. C. & Adams, R. (1937). J. Am. Chem. Soc. 59, 1731-1735.]). In order to prepare single crystals suitable for X-ray experiments, powdered material was dissolved in acetone (20 mg/1 ml) and stored for few days at room temperature under slow evaporation of the solution.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 2[link]. The H atom of the hydroxyl substituent was located in an electron density map and its coordinates were freely refined with Uiso = 1.5Ueq(O). C-bound H atoms were positioned geometrically and refined using a riding model, with d(C—H) = 0.93 Å and Uiso = 1.2Ueq (C) for aromatic, d(C—H) = 0.98 Å and Uiso = 1.2Ueq (C) for methine, d(C—H) = 0.96 Å and Uiso = 1.5Ueq (C) for methyl H atoms.

Table 2
Experimental details

Crystal data
Chemical formula C34H38O8
Mr 574.64
Crystal system, space group Orthorhombic, Pbcn
Temperature (K) 293
a, b, c (Å) 19.7086 (5), 20.3099 (7), 8.8443 (4)
V3) 3540.2 (2)
Z 4
Radiation type Cu Kα
μ (mm−1) 0.62
Crystal size (mm) 0.35 × 0.28 × 0.26
 
Data collection
Diffractometer Oxford Diffraction Xcalibur Ruby
Absorption correction Multi-scan (SCALE3 ABSPACK in CrysAlis PRO; Oxford Diffraction, 2009[Oxford Diffraction (2009). CrysAlis PRO. Oxford Diffraction Ltd, Abingdon, England.])
Tmin, Tmax 0.914, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections 12345, 3340, 1826
Rint 0.049
(sin θ/λ)max−1) 0.613
 
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.056, 0.162, 0.93
No. of reflections 3340
No. of parameters 200
H-atom treatment H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3) 0.24, −0.17
Computer programs: CrysAlis PRO (Oxford Diffraction, 2009[Oxford Diffraction (2009). CrysAlis PRO. Oxford Diffraction Ltd, Abingdon, England.]), SHELXS97, SHELXL97 and XP in SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]).

Supporting information


Chemical context top

Gossypol [2,2'-bis­(8-formyl-1,6,7-tri­hydroxyl-5-iso­propyl-3-methyl­naphthalene)] is an unique terpenoid found in Gossypium (cotton) and related species. Within plants, gossypol appears to act as a natural insecticide and fungicide (Adams et al., 1960). Because of its anti­nutritive effect, gossypol limits the feeding of cottonseed and cottonseed meal to ruminant animals. However, the compound also has a wide range of biological actions, including anti-HIV, anti­cancer, and anti­fertility effects (Liang et al., 1995; Dorsett et al., 1975; Coutinho, 2002; Royer et al., 1995). Gossypol is a surprisingly versatile host compound that forms inclusion complexes with a great variety of organic substances such as ketones, ethers, esters, organic and mineral acids, water, various benzyl compounds and chlorinated and brominated compounds. More than one hundred of these complexes with different guest molecules have been obtained and structurally characterized (Talipov et al., 2002; 2003; 2007; Ibragimov et al., 2004). A specific feature of gossypol is the existence of gossypol host–guest complexes in the form of polymorphic crystals. As a result of its comprehensive biological properties, there is current inter­est in synthesis of new gossypol derivatives. Many derivatives have been reported, including ethers, acetates and Schiff bases with aldehydes (Talipov et al., 2004; 2009; Tilyabaev et al., 2009; Kenar, 2006). As first reported by Morris & Adams (1937), treatment with an alkali of a gossypol solution in a mixture of di­methyl sulfate and methanol, yields a white gossypol tetra­methyl ether, the title compound.

Structural commentary top

Gossypol can exist in one of the following tautomeric forms: aldehyde, quinoid and lactol (Adams et al., 1960). In most solvents it is found in the aldehyde form. However, there are some reports that gossypol also exists in a pure lactol form (Reyes et al., 1986) or as a dynamic equilibrium mixture of the aldehyde and lactol forms in some highly polar solvents (Kamaev et al., 1979). In the structure described here, the title compound exists in the lactol form.

The crystallographically imposed symmetry of the title molecule is C2; the twofold axis is perpendicular to the C2—C2A bond [symmetry code (A): -x, y, 3/2 - z]. The symmetry of the molecule corresponds to symmetry of the crystal, the title compound molecule being situated on a twofold axis. An ORTEP diagram of the molecule showing the atom-numbering scheme is given in Fig. 1. The molecule consists of two fused ring systems, each containing a naphthalene ring system with a fused furan ring. The two napthyl bicycles of the molecule are nearly perpendicular and the dihedral angle between their least-squares planes is 83.8 (1)°. The furan ring is not completely planar, with atom C12 deviating from the C1/O1/C8/C9 plane by 0.225 (4) Å. The meth­oxy group at the C-7 position is almost coplanar with plane of the naphthalene ring system; atomic deviations from this plane are 0.004 (3) Å for O3 and 0.163 (5) Å for C16. The meth­oxy group on the furan ring (C12—O2—C17H3) and atom O1 are located on the same side of the host ring (C1–C4/C9/C10). The iso­propyl groups are positioned with the ternary hydrogen atoms pointed outwards and away from the center of the molecule, the iso­propyl groups bis­ect the extended naphthalene ring system plane.

There is an intra­molecular O4—H4···O3 hydrogen bond (Table 1) which is similar to those observed previously in structures of gossypol and its Schiff bases. The values of the bond lengths and angles in the title molecule are within expected values. However, there are notable differences in the lengths of some of these bonds compared with typical values for gossypol structures. Compared with the relatively short C5—C6 aromatic ring bonds of gossypol molecules (~1.36 Å), the corresponding bond in the title molecule is longer at 1.380 (3) Å. In addition, the C7—C8 and C8—C9 bonds in the title compound are shorter than those in gossypol by 0.03 and 0.06 Å, respectively. The shortest bond within these rings is the C1–C2 bond with a length of 1.359 (3) Å. In the furan ring, there are some differences in the lengths of some bonds compared with the values found in dianhydro­gossypol. In the title molecule, the C1—O1 bond [1.374 (3) Å] is shorter than the O1—C12 bond [1.463 (3) Å].

Supra­molecular features top

The packing of the title molecules is shown in Fig. 2. Weak inter­molecular C—H···O and C—H···π inter­actions (Table 1) consolidate the crystal packing, which exhibits channels with a diameter of approximately 6 Å extending along the c-axis direction. These channels are similar to the channels previously reported in a dianhydro­gossypol crystal structure (Talipov et al., 2009). In the present structure, for each unit cell, the channels provide a void volume of 672 Å3 corresponding to 19% of the unit-cell volume. Highly disordered solvent molecules, most probably water molecules, occupy these voids in the crystal and their contribution to the scattering was removed with the SQUEEZE routine of the PLATON program (Spek, 2015).

Database survey top

A search in the Cambridge Structural Database (Version 5.33, last update November 2013; Groom & Allen, 2014) indicated the presence of 191 entries for gossypol (137 entries) or gossypol derivatives. However, only four entries were found for fused-ring systems containing a naphthalene ring system with a fused furan ring. The dihedral angle between two fused ring systems in these structures is equal to 84.8 in TEYJEM (Ibragimov et al., 1995), 111.8 in TEYJEN (Ibragimov et al., 1995), 117.0 in YURMEE (Talipov et al., 1999) and 119.1° in FOVKEG (Talipov et al., 1999).

Synthesis and crystallization top

Gossypol was obtained from the Experimental Plant of the Institute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan where it was produced from by-products of the cottonseed oil industry. The title compound was synthesized following the known procedure (Morris & Adams, 1937). In order to prepare single crystals suitable for X-ray experiments, powdered material was dissolved in acetone (20 mg/1 ml) and stored for few days at room temperature under slow evaporation of the solution.

Refinement top

Crystal data, data collection and structure refinement details are summarized in Table 2. The H atom of the hydroxyl substituent was located in an electron density map and its coordinates were freely refined with Uiso = 1.5Ueq(O). C-bound H atoms were positioned geometrically and refined using a riding model, with d(C—H) = 0.93 Å and Uiso = 1.2Ueq (C) for aromatic, d(C—H) = 0.98 Å and Uiso = 1.2Ueq (C) for methine, d(C—H) = 0.96 Å and Uiso = 1.5Ueq (C) for methyl H atoms.

Related literature top

For related literature, see: Adams et al. (1960); Coutinho (2002); Dorsett et al. (1975); Ibragimov & Talipov (2004); Ibragimov et al. (1995); Kamaev et al. (1979); Kenar (2006); Liang et al. (1995); Morris & Adams (1937); Reyes et al. (1986); Royer et al. (1995); Spek (2009); Talipov et al. (1999, 2002, 2003, 2004, 2007, 2009); Tilyabaev et al. (2009).

Computing details top

Data collection: CrysAlis PRO (Oxford Diffraction, 2009); cell refinement: CrysAlis PRO (Oxford Diffraction, 2009); data reduction: CrysAlis PRO (Oxford Diffraction, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).

Figures top
[Figure 1] Fig. 1. The molecular structure of the title compound showing the atomic numbering and 50% probability displacement ellipsoids. Unlabeled atoms are related to labeled ones by the symmetry operation (A) -x, y, 3/2 - z.
[Figure 2] Fig. 2. A portion of the crystal packing viewed approximately along the c axis.
5,5'-Diisopropyl-2,2',3,3'-tetramethoxy-7,7'-dimethyl-2H,2'H-8,8'-bi[naphtho[1,8-bc]furan]-4,4'-diol top
Crystal data top
C34H38O8Dx = 1.078 Mg m3
Mr = 574.64Cu Kα radiation, λ = 1.54184 Å
Orthorhombic, PbcnCell parameters from 2468 reflections
a = 19.7086 (5) Åθ = 4.4–70.6°
b = 20.3099 (7) ŵ = 0.62 mm1
c = 8.8443 (4) ÅT = 293 K
V = 3540.2 (2) Å3Prism, white
Z = 40.35 × 0.28 × 0.26 mm
F(000) = 1224
Data collection top
Oxford Diffraction Xcalibur Ruby
diffractometer
3340 independent reflections
Radiation source: fine-focus sealed tube1826 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.049
Detector resolution: 10.2576 pixels mm-1θmax = 71.0°, θmin = 4.4°
ω scansh = 2324
Absorption correction: multi-scan
(SCALE3 ABSPACK in CrysAlis PRO; Oxford Diffraction, 2009)
k = 2224
Tmin = 0.914, Tmax = 1.000l = 1010
12345 measured reflections
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.056H atoms treated by a mixture of independent and constrained refinement
wR(F2) = 0.162 w = 1/[σ2(Fo2) + (0.0932P)2]
where P = (Fo2 + 2Fc2)/3
S = 0.93(Δ/σ)max < 0.001
3340 reflectionsΔρmax = 0.24 e Å3
200 parametersΔρmin = 0.17 e Å3
0 restraintsExtinction correction: SHELXL, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.00096 (17)
Crystal data top
C34H38O8V = 3540.2 (2) Å3
Mr = 574.64Z = 4
Orthorhombic, PbcnCu Kα radiation
a = 19.7086 (5) ŵ = 0.62 mm1
b = 20.3099 (7) ÅT = 293 K
c = 8.8443 (4) Å0.35 × 0.28 × 0.26 mm
Data collection top
Oxford Diffraction Xcalibur Ruby
diffractometer
3340 independent reflections
Absorption correction: multi-scan
(SCALE3 ABSPACK in CrysAlis PRO; Oxford Diffraction, 2009)
1826 reflections with I > 2σ(I)
Tmin = 0.914, Tmax = 1.000Rint = 0.049
12345 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.0560 restraints
wR(F2) = 0.162H atoms treated by a mixture of independent and constrained refinement
S = 0.93Δρmax = 0.24 e Å3
3340 reflectionsΔρmin = 0.17 e Å3
200 parameters
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
O10.06600 (7)0.08142 (8)0.91284 (19)0.0592 (5)
O20.12998 (9)0.01420 (8)0.8665 (2)0.0664 (5)
O30.29694 (8)0.05026 (10)0.9636 (2)0.0735 (6)
O40.35682 (9)0.13669 (12)0.7953 (3)0.0731 (6)
C10.08110 (10)0.12972 (12)0.8095 (3)0.0487 (6)
C20.03731 (10)0.17024 (12)0.7358 (3)0.0486 (6)
C30.06794 (11)0.21591 (12)0.6321 (3)0.0521 (6)
C40.13705 (10)0.22063 (12)0.6150 (2)0.0503 (6)
H4A0.15450.25120.54720.060*
C50.25535 (11)0.18076 (12)0.6976 (2)0.0498 (6)
C60.28733 (10)0.13639 (12)0.7919 (3)0.0518 (6)
C70.25350 (11)0.08978 (12)0.8849 (3)0.0532 (6)
C80.18412 (11)0.08864 (11)0.8835 (2)0.0482 (6)
C90.15172 (10)0.13466 (11)0.7923 (2)0.0465 (5)
C100.18240 (10)0.18039 (12)0.6973 (2)0.0463 (6)
C110.02224 (12)0.25791 (16)0.5367 (3)0.0750 (9)
H11B0.04920.28730.47660.113*
H11C0.00730.28300.60090.113*
H11A0.00440.23030.47160.113*
C120.12826 (11)0.04508 (13)0.9467 (3)0.0575 (7)
H120.13370.03791.05560.069*
C130.29419 (11)0.22682 (14)0.5945 (3)0.0618 (7)
H130.26020.25220.53850.074*
C140.33502 (14)0.18881 (18)0.4773 (3)0.0909 (10)
H14A0.30520.16080.42040.136*
H14C0.36860.16240.52730.136*
H14B0.35700.21920.41020.136*
C150.33765 (15)0.27649 (16)0.6781 (4)0.0922 (11)
H15B0.30960.30200.74480.138*
H15A0.35920.30520.60650.138*
H15C0.37160.25380.73570.138*
C160.26946 (16)0.00777 (18)1.0766 (4)0.1007 (12)
H16C0.30570.01541.12600.151*
H16A0.23930.02331.03010.151*
H16B0.24500.03341.14960.151*
C170.08064 (15)0.06108 (16)0.9165 (4)0.0945 (11)
H17B0.08600.10140.86100.142*
H17A0.03590.04380.89970.142*
H17C0.08690.06951.02240.142*
H40.3667 (18)0.1176 (19)0.854 (4)0.103 (15)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
O10.0420 (8)0.0675 (11)0.0681 (11)0.0003 (8)0.0123 (8)0.0175 (9)
O20.0564 (10)0.0584 (11)0.0845 (13)0.0061 (8)0.0122 (9)0.0081 (10)
O30.0514 (10)0.0864 (14)0.0826 (13)0.0050 (9)0.0047 (9)0.0296 (11)
O40.0407 (10)0.0939 (16)0.0847 (15)0.0017 (9)0.0052 (9)0.0252 (13)
C10.0415 (12)0.0552 (14)0.0493 (13)0.0065 (10)0.0090 (10)0.0020 (12)
C20.0375 (11)0.0582 (14)0.0501 (13)0.0007 (11)0.0027 (10)0.0023 (12)
C30.0425 (12)0.0617 (15)0.0519 (13)0.0020 (11)0.0005 (10)0.0027 (12)
C40.0432 (12)0.0590 (15)0.0487 (13)0.0012 (11)0.0035 (10)0.0063 (11)
C50.0394 (11)0.0610 (15)0.0489 (13)0.0040 (10)0.0019 (10)0.0022 (12)
C60.0328 (11)0.0673 (16)0.0553 (13)0.0021 (11)0.0013 (10)0.0006 (12)
C70.0454 (12)0.0613 (16)0.0530 (14)0.0030 (11)0.0028 (11)0.0063 (12)
C80.0412 (12)0.0544 (14)0.0491 (13)0.0001 (10)0.0029 (10)0.0052 (11)
C90.0402 (11)0.0545 (14)0.0448 (12)0.0016 (10)0.0042 (10)0.0000 (11)
C100.0393 (11)0.0569 (14)0.0428 (12)0.0033 (10)0.0037 (9)0.0035 (11)
C110.0463 (13)0.094 (2)0.085 (2)0.0059 (14)0.0003 (13)0.0254 (17)
C120.0486 (13)0.0697 (17)0.0543 (15)0.0002 (12)0.0060 (11)0.0100 (13)
C130.0400 (12)0.0816 (18)0.0638 (16)0.0047 (12)0.0038 (11)0.0176 (14)
C140.0742 (19)0.124 (3)0.075 (2)0.0012 (18)0.0247 (16)0.020 (2)
C150.086 (2)0.097 (2)0.094 (2)0.0331 (19)0.0049 (17)0.024 (2)
C160.077 (2)0.119 (3)0.106 (2)0.002 (2)0.0097 (18)0.062 (2)
C170.084 (2)0.081 (2)0.119 (3)0.0242 (18)0.0142 (19)0.022 (2)
Geometric parameters (Å, º) top
O1—C11.374 (3)C8—C121.519 (3)
O1—C121.463 (3)C9—C101.391 (3)
O2—C121.398 (3)C11—H11B0.9600
O2—C171.431 (3)C11—H11C0.9600
O3—C71.364 (3)C11—H11A0.9600
O3—C161.427 (3)C12—H120.9800
O4—C61.370 (3)C13—C151.516 (4)
O4—H40.67 (3)C13—C141.523 (4)
C1—C21.359 (3)C13—H130.9800
C1—C91.404 (3)C14—H14A0.9600
C2—C31.437 (3)C14—H14C0.9600
C2—C2i1.492 (4)C14—H14B0.9600
C3—C41.374 (3)C15—H15B0.9600
C3—C111.500 (3)C15—H15A0.9600
C4—C101.413 (3)C15—H15C0.9600
C4—H4A0.9300C16—H16C0.9600
C5—C61.380 (3)C16—H16A0.9600
C5—C101.438 (3)C16—H16B0.9600
C5—C131.514 (3)C17—H17B0.9600
C6—C71.420 (3)C17—H17A0.9600
C7—C81.368 (3)C17—H17C0.9600
C8—C91.390 (3)
C1—O1—C12108.35 (16)H11B—C11—H11A109.5
C12—O2—C17113.6 (2)H11C—C11—H11A109.5
C7—O3—C16118.3 (2)O2—C12—O1110.5 (2)
C6—O4—H4108 (3)O2—C12—C8107.31 (18)
C2—C1—O1127.89 (19)O1—C12—C8103.82 (18)
C2—C1—C9122.3 (2)O2—C12—H12111.6
O1—C1—C9109.76 (19)O1—C12—H12111.6
C1—C2—C3115.48 (19)C8—C12—H12111.6
C1—C2—C2i123.0 (2)C5—C13—C15113.8 (2)
C3—C2—C2i121.44 (19)C5—C13—C14111.3 (2)
C4—C3—C2122.1 (2)C15—C13—C14111.8 (2)
C4—C3—C11119.6 (2)C5—C13—H13106.5
C2—C3—C11118.3 (2)C15—C13—H13106.5
C3—C4—C10122.0 (2)C14—C13—H13106.5
C3—C4—H4A119.0C13—C14—H14A109.5
C10—C4—H4A119.0C13—C14—H14C109.5
C6—C5—C10117.0 (2)H14A—C14—H14C109.5
C6—C5—C13122.44 (19)C13—C14—H14B109.5
C10—C5—C13120.5 (2)H14A—C14—H14B109.5
O4—C6—C5117.8 (2)H14C—C14—H14B109.5
O4—C6—C7117.3 (2)C13—C15—H15B109.5
C5—C6—C7124.81 (19)C13—C15—H15A109.5
O3—C7—C8128.5 (2)H15B—C15—H15A109.5
O3—C7—C6113.13 (19)C13—C15—H15C109.5
C8—C7—C6118.4 (2)H15B—C15—H15C109.5
C7—C8—C9116.9 (2)H15A—C15—H15C109.5
C7—C8—C12137.0 (2)O3—C16—H16C109.5
C9—C8—C12105.79 (18)O3—C16—H16A109.5
C8—C9—C10126.9 (2)H16C—C16—H16A109.5
C8—C9—C1110.1 (2)O3—C16—H16B109.5
C10—C9—C1123.0 (2)H16C—C16—H16B109.5
C9—C10—C4114.98 (19)H16A—C16—H16B109.5
C9—C10—C5115.9 (2)O2—C17—H17B109.5
C4—C10—C5129.1 (2)O2—C17—H17A109.5
C3—C11—H11B109.5H17B—C17—H17A109.5
C3—C11—H11C109.5O2—C17—H17C109.5
H11B—C11—H11C109.5H17B—C17—H17C109.5
C3—C11—H11A109.5H17A—C17—H17C109.5
C12—O1—C1—C2172.7 (2)C7—C8—C9—C1176.7 (2)
C12—O1—C1—C99.9 (3)C12—C8—C9—C18.3 (3)
O1—C1—C2—C3179.4 (2)C2—C1—C9—C8178.3 (2)
C9—C1—C2—C33.6 (3)O1—C1—C9—C80.8 (3)
O1—C1—C2—C2i3.4 (4)C2—C1—C9—C101.0 (4)
C9—C1—C2—C2i173.7 (2)O1—C1—C9—C10178.6 (2)
C1—C2—C3—C43.4 (3)C8—C9—C10—C4178.9 (2)
C2i—C2—C3—C4173.9 (2)C1—C9—C10—C41.9 (3)
C1—C2—C3—C11174.6 (2)C8—C9—C10—C51.7 (3)
C2i—C2—C3—C118.1 (4)C1—C9—C10—C5177.5 (2)
C2—C3—C4—C100.6 (4)C3—C4—C10—C92.0 (3)
C11—C3—C4—C10177.4 (2)C3—C4—C10—C5177.2 (2)
C10—C5—C6—O4179.0 (2)C6—C5—C10—C90.4 (3)
C13—C5—C6—O42.7 (4)C13—C5—C10—C9177.8 (2)
C10—C5—C6—C71.6 (4)C6—C5—C10—C4178.8 (2)
C13—C5—C6—C7176.6 (2)C13—C5—C10—C42.9 (4)
C16—O3—C7—C810.0 (4)C17—O2—C12—O168.7 (3)
C16—O3—C7—C6171.4 (2)C17—O2—C12—C8178.7 (2)
O4—C6—C7—O31.3 (3)C1—O1—C12—O2100.5 (2)
C5—C6—C7—O3178.0 (2)C1—O1—C12—C814.3 (2)
O4—C6—C7—C8179.9 (2)C7—C8—C12—O270.0 (4)
C5—C6—C7—C80.8 (4)C9—C8—C12—O2103.5 (2)
O3—C7—C8—C9179.8 (2)C7—C8—C12—O1172.9 (3)
C6—C7—C8—C91.3 (4)C9—C8—C12—O113.6 (2)
O3—C7—C8—C126.8 (5)C6—C5—C13—C1564.3 (3)
C6—C7—C8—C12171.7 (3)C10—C5—C13—C15117.5 (3)
C7—C8—C9—C102.6 (4)C6—C5—C13—C1463.1 (3)
C12—C8—C9—C10172.4 (2)C10—C5—C13—C14115.1 (3)
Symmetry code: (i) x, y, z+3/2.
Hydrogen-bond geometry (Å, º) top
Cg is the centroid of the C1–C4/C9/C10 ring.
D—H···AD—HH···AD···AD—H···A
O4—H4···O30.67 (3)2.17 (4)2.586 (3)122 (4)
C17—H17A···O1ii0.962.713.286 (3)119
C17—H17C···Cgiii0.962.773.551 (4)139
Symmetry codes: (ii) x, y, z+2; (iii) x, y, z+1/2.
Hydrogen-bond geometry (Å, º) top
Cg is the centroid of the C1–C4/C9/C10 ring.
D—H···AD—HH···AD···AD—H···A
O4—H4···O30.67 (3)2.17 (4)2.586 (3)122 (4)
C17—H17A···O1i0.962.713.286 (3)119
C17—H17C···Cgii0.962.773.551 (4)139
Symmetry codes: (i) x, y, z+2; (ii) x, y, z+1/2.

Experimental details

Crystal data
Chemical formulaC34H38O8
Mr574.64
Crystal system, space groupOrthorhombic, Pbcn
Temperature (K)293
a, b, c (Å)19.7086 (5), 20.3099 (7), 8.8443 (4)
V3)3540.2 (2)
Z4
Radiation typeCu Kα
µ (mm1)0.62
Crystal size (mm)0.35 × 0.28 × 0.26
Data collection
DiffractometerOxford Diffraction Xcalibur Ruby
diffractometer
Absorption correctionMulti-scan
(SCALE3 ABSPACK in CrysAlis PRO; Oxford Diffraction, 2009)
Tmin, Tmax0.914, 1.000
No. of measured, independent and
observed [I > 2σ(I)] reflections
12345, 3340, 1826
Rint0.049
(sin θ/λ)max1)0.613
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.056, 0.162, 0.93
No. of reflections3340
No. of parameters200
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.24, 0.17

Computer programs: CrysAlis PRO (Oxford Diffraction, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008).

 

Acknowledgements

This investigation was supported by research grants F7–T048 from the Uzbek National Science Foundation.

References

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Volume 71| Part 2| February 2015| Pages 184-187
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