organic compounds
of 5-chloro-3-cyclohexylsulfinyl-2,4,6-trimethyl-1-benzofuran
aDepartment of Chemistry, Dongeui University, San 24 Kaya-dong, Busanjin-gu, Busan 614-714, Republic of Korea, and bDepartment of Chemistry, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea
*Correspondence e-mail: uklee@pknu.ac.kr
In the title compound, C17H21ClO2S, the cyclohexyl ring adopts a chair conformation with the C—S bond in an equatorial orientation. In the crystal, molecules are linked by C—H⋯O and C—H⋯π hydrogen bonds and a Cl⋯π [3.594 (2) Å] contact into chains along the a-axis direction.
CCDC reference: 1021106
1. Related literature
For the biological activity of benzofuran compounds, see: Aslam et al. (2009); Galal et al. (2009); Howlett et al. (1999); Khan et al. (2005); Ono et al. (2002). For natural products with a benzofuran ring, see: Akgul & Anil (2003); Soekamto et al. (2003). For the synthesis of the starting material 5-chloro-3-cyclohexylsulfanyl-2,4,6-trimethyl-1-benzofuran, see: Choi et al. (1999). For a related structure, see: Choi et al. (2011).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97.
Supporting information
CCDC reference: 1021106
10.1107/S1600536814019217/hb7277sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536814019217/hb7277Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536814019217/hb7277Isup3.cml
The starting material 5-chloro-3-cyclohexylsulfanyl-2,4,6-trimethyl-1-benzofuran was prepared by literature method (Choi et al. 1999). 3-Chloroperoxybenzoic acid (77%, 224 mg, 1.0 mmol) was added in small portions to a stirred solution of 5-chloro-3-cyclohexylsulfanyl-2,4,6-trimethyl-1-benzofuran (278 mg, 0.9 mmol) in dichloromethane (20 mL) at 273 K. After being stirred at room temperature for 5h, the mixture was washed with saturated sodium bicarbonate solution (2 × 10 ml) and the organic layer was separated, dried over magnesium sulfate, filtered and concentrated at reduced pressure. The residue was purified by
(hexane–ethyl acetate, 2:1 v/v) to afford the title compound as a colorless solid [yield 77% (250 mg); m.p. 449–450 K; Rf = 0.61 (hexane–ethyl acetate, 2:1 v/v)]. Colourless blocks were prepared by slow evaporation of a solution of the title compound (26 mg) in ethyl acetate (10 ml) at room temperature.All H atoms were positioned geometrically and refined using a riding model, with C—H = 0.95 Å for aryl, 1.00 Åfor methine, 0.99 Å for methylene and 0.98 Å for methyl H atoms, respectively. Uiso = 1.2Ueq (C) for aryl, methine and methylene, and 1.5Ueq for methyl H atoms. The positions of methyl and methylene hydrogens were optimized using the SHELXL-97 command AFIX 137 (Sheldrick, 2008).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound with displacement ellipsoids drawn at the 50% probability level. | |
Fig. 2. A view of the C—H···O, C—H···π and C—Cl···π interactions (dotted lines) in the crystal structure of the title compound. H atoms non-participating in hydrogen-bonding were omitted for clarity. [Symmetry codes: (i) x - 1, y, z; (ii) x + 1, y, z.] |
C17H21ClO2S | Z = 2 |
Mr = 324.85 | F(000) = 344 |
Triclinic, P1 | Dx = 1.382 Mg m−3 |
Hall symbol: -P 1 | Melting point = 417–416 K |
a = 5.8612 (1) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 11.6832 (2) Å | Cell parameters from 5736 reflections |
c = 12.6432 (2) Å | θ = 3.1–27.5° |
α = 65.292 (1)° | µ = 0.38 mm−1 |
β = 85.902 (1)° | T = 173 K |
γ = 83.229 (1)° | Block, colourless |
V = 780.79 (2) Å3 | 0.31 × 0.24 × 0.23 mm |
Bruker SMART APEXII CCD diffractometer | 3588 independent reflections |
Radiation source: rotating anode | 3221 reflections with I > 2σ(I) |
Graphite multilayer monochromator | Rint = 0.024 |
Detector resolution: 10.0 pixels mm-1 | θmax = 27.5°, θmin = 1.8° |
ϕ and ω scans | h = −7→6 |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | k = −15→15 |
Tmin = 0.892, Tmax = 0.917 | l = −16→16 |
13925 measured reflections |
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)] = 0.039 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0521P)2 + 0.403P] where P = (Fo2 + 2Fc2)/3 |
3588 reflections | (Δ/σ)max = 0.001 |
193 parameters | Δρmax = 0.77 e Å−3 |
0 restraints | Δρmin = −0.37 e Å−3 |
C17H21ClO2S | γ = 83.229 (1)° |
Mr = 324.85 | V = 780.79 (2) Å3 |
Triclinic, P1 | Z = 2 |
a = 5.8612 (1) Å | Mo Kα radiation |
b = 11.6832 (2) Å | µ = 0.38 mm−1 |
c = 12.6432 (2) Å | T = 173 K |
α = 65.292 (1)° | 0.31 × 0.24 × 0.23 mm |
β = 85.902 (1)° |
Bruker SMART APEXII CCD diffractometer | 3588 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 3221 reflections with I > 2σ(I) |
Tmin = 0.892, Tmax = 0.917 | Rint = 0.024 |
13925 measured reflections |
R[F2 > 2σ(F2)] = 0.039 | 0 restraints |
wR(F2) = 0.102 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.77 e Å−3 |
3588 reflections | Δρmin = −0.37 e Å−3 |
193 parameters |
Experimental. 1H NMR (δ p.p.m., CDCl3, 400 Hz): 7.19 (s, 1H), 2.73 (s, 3H), 2.36 (s, 3H), 2.31 (s, 3H), 1.63-2.12 (m, 5H), 1.10-1.58 (m, 6H). |
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 | ||
Cl1 | −0.27225 (7) | 0.86676 (4) | 0.02495 (4) | 0.03675 (13) | |
S1 | 0.57459 (7) | 0.47693 (4) | 0.17641 (4) | 0.02576 (12) | |
O1 | 0.47568 (19) | 0.69596 (10) | 0.34877 (10) | 0.0266 (2) | |
O2 | 0.8052 (2) | 0.41466 (12) | 0.22085 (12) | 0.0382 (3) | |
C1 | 0.4841 (3) | 0.58674 (14) | 0.23789 (13) | 0.0218 (3) | |
C2 | 0.2864 (2) | 0.68140 (14) | 0.20410 (13) | 0.0213 (3) | |
C3 | 0.1136 (3) | 0.71923 (14) | 0.12166 (13) | 0.0225 (3) | |
C4 | −0.0488 (3) | 0.81617 (15) | 0.12320 (14) | 0.0257 (3) | |
C5 | −0.0466 (3) | 0.87677 (14) | 0.19854 (15) | 0.0282 (3) | |
C6 | 0.1294 (3) | 0.83926 (15) | 0.27712 (15) | 0.0277 (3) | |
H6 | 0.1388 | 0.8783 | 0.3290 | 0.033* | |
C7 | 0.2904 (3) | 0.74323 (14) | 0.27712 (13) | 0.0238 (3) | |
C8 | 0.5900 (3) | 0.60035 (14) | 0.32321 (14) | 0.0243 (3) | |
C9 | 0.1048 (3) | 0.66135 (16) | 0.03624 (14) | 0.0283 (3) | |
H9A | −0.0059 | 0.5977 | 0.0645 | 0.042* | |
H9B | 0.2574 | 0.6211 | 0.0279 | 0.042* | |
H9C | 0.0572 | 0.7275 | −0.0395 | 0.042* | |
C10 | −0.2283 (3) | 0.98104 (17) | 0.19422 (18) | 0.0377 (4) | |
H10A | −0.1957 | 1.0125 | 0.2517 | 0.056* | |
H10B | −0.3792 | 0.9481 | 0.2119 | 0.056* | |
H10C | −0.2281 | 1.0503 | 0.1162 | 0.056* | |
C11 | 0.7959 (3) | 0.53609 (17) | 0.39374 (15) | 0.0318 (4) | |
H11A | 0.7481 | 0.4858 | 0.4744 | 0.048* | |
H11B | 0.8933 | 0.5996 | 0.3919 | 0.048* | |
H11C | 0.8826 | 0.4803 | 0.3616 | 0.048* | |
C12 | 0.3682 (3) | 0.36179 (14) | 0.25301 (13) | 0.0220 (3) | |
H12 | 0.2101 | 0.4071 | 0.2406 | 0.026* | |
C16 | 0.2432 (4) | 0.19538 (17) | 0.44265 (15) | 0.0383 (4) | |
H16A | 0.2776 | 0.1507 | 0.5265 | 0.046* | |
H16B | 0.0837 | 0.2361 | 0.4357 | 0.046* | |
C17 | 0.4088 (3) | 0.29673 (16) | 0.38293 (14) | 0.0318 (4) | |
H17A | 0.3861 | 0.3601 | 0.4166 | 0.038* | |
H17B | 0.5691 | 0.2573 | 0.3966 | 0.038* | |
C13 | 0.3866 (3) | 0.26742 (15) | 0.19771 (14) | 0.0274 (3) | |
H13A | 0.3500 | 0.3125 | 0.1142 | 0.033* | |
H13B | 0.5459 | 0.2267 | 0.2036 | 0.033* | |
C14 | 0.2215 (3) | 0.16667 (16) | 0.25851 (15) | 0.0325 (4) | |
H14A | 0.0614 | 0.2066 | 0.2458 | 0.039* | |
H14B | 0.2415 | 0.1037 | 0.2243 | 0.039* | |
C15 | 0.2635 (4) | 0.10016 (16) | 0.38823 (16) | 0.0382 (4) | |
H15A | 0.4190 | 0.0539 | 0.4013 | 0.046* | |
H15B | 0.1500 | 0.0378 | 0.4260 | 0.046* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0255 (2) | 0.0385 (2) | 0.0353 (2) | 0.00422 (17) | −0.00709 (17) | −0.00539 (18) |
S1 | 0.0211 (2) | 0.0256 (2) | 0.0315 (2) | −0.00217 (14) | 0.00493 (15) | −0.01365 (16) |
O1 | 0.0263 (6) | 0.0269 (6) | 0.0297 (6) | −0.0042 (4) | −0.0037 (5) | −0.0137 (5) |
O2 | 0.0201 (6) | 0.0393 (7) | 0.0566 (8) | 0.0026 (5) | 0.0011 (5) | −0.0231 (6) |
C1 | 0.0180 (7) | 0.0213 (7) | 0.0255 (7) | −0.0026 (5) | 0.0000 (5) | −0.0088 (6) |
C2 | 0.0181 (7) | 0.0201 (7) | 0.0245 (7) | −0.0038 (5) | 0.0022 (6) | −0.0078 (6) |
C3 | 0.0203 (7) | 0.0218 (7) | 0.0225 (7) | −0.0044 (6) | 0.0019 (6) | −0.0060 (6) |
C4 | 0.0195 (7) | 0.0243 (7) | 0.0259 (8) | −0.0019 (6) | −0.0001 (6) | −0.0033 (6) |
C5 | 0.0256 (8) | 0.0198 (7) | 0.0330 (8) | −0.0020 (6) | 0.0059 (6) | −0.0057 (6) |
C6 | 0.0308 (8) | 0.0225 (7) | 0.0319 (8) | −0.0057 (6) | 0.0049 (7) | −0.0133 (6) |
C7 | 0.0227 (7) | 0.0226 (7) | 0.0258 (7) | −0.0049 (6) | 0.0002 (6) | −0.0092 (6) |
C8 | 0.0209 (7) | 0.0231 (7) | 0.0283 (8) | −0.0044 (6) | 0.0001 (6) | −0.0096 (6) |
C9 | 0.0266 (8) | 0.0322 (8) | 0.0259 (8) | −0.0018 (6) | −0.0032 (6) | −0.0116 (7) |
C10 | 0.0320 (9) | 0.0264 (8) | 0.0490 (11) | 0.0030 (7) | 0.0068 (8) | −0.0128 (8) |
C11 | 0.0247 (8) | 0.0352 (9) | 0.0323 (9) | −0.0022 (7) | −0.0074 (7) | −0.0100 (7) |
C12 | 0.0192 (7) | 0.0222 (7) | 0.0247 (7) | −0.0009 (5) | 0.0002 (5) | −0.0102 (6) |
C16 | 0.0529 (12) | 0.0331 (9) | 0.0266 (9) | −0.0095 (8) | 0.0087 (8) | −0.0101 (7) |
C17 | 0.0410 (10) | 0.0318 (9) | 0.0244 (8) | −0.0058 (7) | −0.0009 (7) | −0.0128 (7) |
C13 | 0.0326 (9) | 0.0262 (8) | 0.0256 (8) | −0.0027 (6) | 0.0008 (6) | −0.0130 (6) |
C14 | 0.0376 (9) | 0.0267 (8) | 0.0358 (9) | −0.0067 (7) | 0.0010 (7) | −0.0150 (7) |
C15 | 0.0514 (12) | 0.0244 (8) | 0.0347 (9) | −0.0078 (8) | 0.0070 (8) | −0.0084 (7) |
Cl1—C4 | 1.7444 (16) | C10—H10B | 0.9800 |
S1—O2 | 1.4857 (12) | C10—H10C | 0.9800 |
S1—C1 | 1.7737 (16) | C11—H11A | 0.9800 |
S1—C12 | 1.8268 (16) | C11—H11B | 0.9800 |
O1—C7 | 1.3734 (19) | C11—H11C | 0.9800 |
O1—C8 | 1.3768 (19) | C12—C17 | 1.517 (2) |
C1—C8 | 1.355 (2) | C12—C13 | 1.524 (2) |
C1—C2 | 1.456 (2) | C12—H12 | 1.0000 |
C2—C7 | 1.392 (2) | C16—C15 | 1.524 (3) |
C2—C3 | 1.403 (2) | C16—C17 | 1.527 (3) |
C3—C4 | 1.397 (2) | C16—H16A | 0.9900 |
C3—C9 | 1.501 (2) | C16—H16B | 0.9900 |
C4—C5 | 1.406 (2) | C17—H17A | 0.9900 |
C5—C6 | 1.385 (2) | C17—H17B | 0.9900 |
C5—C10 | 1.506 (2) | C13—C14 | 1.523 (2) |
C6—C7 | 1.378 (2) | C13—H13A | 0.9900 |
C6—H6 | 0.9500 | C13—H13B | 0.9900 |
C8—C11 | 1.482 (2) | C14—C15 | 1.517 (2) |
C9—H9A | 0.9800 | C14—H14A | 0.9900 |
C9—H9B | 0.9800 | C14—H14B | 0.9900 |
C9—H9C | 0.9800 | C15—H15A | 0.9900 |
C10—H10A | 0.9800 | C15—H15B | 0.9900 |
O2—S1—C1 | 108.70 (7) | C8—C11—H11B | 109.5 |
O2—S1—C12 | 106.89 (7) | H11A—C11—H11B | 109.5 |
C1—S1—C12 | 98.02 (7) | C8—C11—H11C | 109.5 |
C7—O1—C8 | 106.43 (12) | H11A—C11—H11C | 109.5 |
C8—C1—C2 | 107.18 (13) | H11B—C11—H11C | 109.5 |
C8—C1—S1 | 126.24 (12) | C17—C12—C13 | 111.82 (13) |
C2—C1—S1 | 126.56 (12) | C17—C12—S1 | 112.03 (11) |
C7—C2—C3 | 119.57 (14) | C13—C12—S1 | 107.37 (10) |
C7—C2—C1 | 104.35 (13) | C17—C12—H12 | 108.5 |
C3—C2—C1 | 136.08 (14) | C13—C12—H12 | 108.5 |
C4—C3—C2 | 115.37 (14) | S1—C12—H12 | 108.5 |
C4—C3—C9 | 122.03 (14) | C15—C16—C17 | 111.07 (15) |
C2—C3—C9 | 122.59 (14) | C15—C16—H16A | 109.4 |
C3—C4—C5 | 124.84 (15) | C17—C16—H16A | 109.4 |
C3—C4—Cl1 | 118.17 (13) | C15—C16—H16B | 109.4 |
C5—C4—Cl1 | 116.99 (12) | C17—C16—H16B | 109.4 |
C6—C5—C4 | 118.38 (14) | H16A—C16—H16B | 108.0 |
C6—C5—C10 | 120.13 (16) | C12—C17—C16 | 110.44 (14) |
C4—C5—C10 | 121.48 (16) | C12—C17—H17A | 109.6 |
C7—C6—C5 | 117.47 (15) | C16—C17—H17A | 109.6 |
C7—C6—H6 | 121.3 | C12—C17—H17B | 109.6 |
C5—C6—H6 | 121.3 | C16—C17—H17B | 109.6 |
O1—C7—C6 | 124.62 (15) | H17A—C17—H17B | 108.1 |
O1—C7—C2 | 111.05 (13) | C14—C13—C12 | 110.48 (13) |
C6—C7—C2 | 124.33 (15) | C14—C13—H13A | 109.6 |
C1—C8—O1 | 110.96 (13) | C12—C13—H13A | 109.6 |
C1—C8—C11 | 134.70 (15) | C14—C13—H13B | 109.6 |
O1—C8—C11 | 114.33 (14) | C12—C13—H13B | 109.6 |
C3—C9—H9A | 109.5 | H13A—C13—H13B | 108.1 |
C3—C9—H9B | 109.5 | C15—C14—C13 | 111.19 (15) |
H9A—C9—H9B | 109.5 | C15—C14—H14A | 109.4 |
C3—C9—H9C | 109.5 | C13—C14—H14A | 109.4 |
H9A—C9—H9C | 109.5 | C15—C14—H14B | 109.4 |
H9B—C9—H9C | 109.5 | C13—C14—H14B | 109.4 |
C5—C10—H10A | 109.5 | H14A—C14—H14B | 108.0 |
C5—C10—H10B | 109.5 | C14—C15—C16 | 110.65 (14) |
H10A—C10—H10B | 109.5 | C14—C15—H15A | 109.5 |
C5—C10—H10C | 109.5 | C16—C15—H15A | 109.5 |
H10A—C10—H10C | 109.5 | C14—C15—H15B | 109.5 |
H10B—C10—H10C | 109.5 | C16—C15—H15B | 109.5 |
C8—C11—H11A | 109.5 | H15A—C15—H15B | 108.1 |
O2—S1—C1—C8 | −8.41 (17) | C5—C6—C7—O1 | 179.49 (14) |
C12—S1—C1—C8 | 102.54 (15) | C5—C6—C7—C2 | −0.4 (2) |
O2—S1—C1—C2 | 169.73 (13) | C3—C2—C7—O1 | −177.97 (13) |
C12—S1—C1—C2 | −79.33 (14) | C1—C2—C7—O1 | 1.59 (17) |
C8—C1—C2—C7 | −1.28 (17) | C3—C2—C7—C6 | 2.0 (2) |
S1—C1—C2—C7 | −179.71 (11) | C1—C2—C7—C6 | −178.49 (15) |
C8—C1—C2—C3 | 178.16 (17) | C2—C1—C8—O1 | 0.56 (17) |
S1—C1—C2—C3 | −0.3 (3) | S1—C1—C8—O1 | 178.99 (11) |
C7—C2—C3—C4 | −2.1 (2) | C2—C1—C8—C11 | −179.83 (17) |
C1—C2—C3—C4 | 178.50 (16) | S1—C1—C8—C11 | −1.4 (3) |
C7—C2—C3—C9 | 176.98 (14) | C7—O1—C8—C1 | 0.42 (17) |
C1—C2—C3—C9 | −2.4 (3) | C7—O1—C8—C11 | −179.28 (13) |
C2—C3—C4—C5 | 1.0 (2) | O2—S1—C12—C17 | 45.90 (13) |
C9—C3—C4—C5 | −178.09 (15) | C1—S1—C12—C17 | −66.51 (12) |
C2—C3—C4—Cl1 | −178.93 (11) | O2—S1—C12—C13 | −77.25 (12) |
C9—C3—C4—Cl1 | 2.0 (2) | C1—S1—C12—C13 | 170.35 (11) |
C3—C4—C5—C6 | 0.4 (2) | C13—C12—C17—C16 | −55.75 (19) |
Cl1—C4—C5—C6 | −179.62 (12) | S1—C12—C17—C16 | −176.35 (12) |
C3—C4—C5—C10 | 179.79 (15) | C15—C16—C17—C12 | 56.0 (2) |
Cl1—C4—C5—C10 | −0.3 (2) | C17—C12—C13—C14 | 55.82 (18) |
C4—C5—C6—C7 | −0.7 (2) | S1—C12—C13—C14 | 179.10 (11) |
C10—C5—C6—C7 | 179.89 (15) | C12—C13—C14—C15 | −56.10 (19) |
C8—O1—C7—C6 | 178.78 (15) | C13—C14—C15—C16 | 56.9 (2) |
C8—O1—C7—C2 | −1.29 (17) | C17—C16—C15—C14 | −56.7 (2) |
Cg2 is the centroid of the C2–C7 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.98 | 2.53 | 3.438 (2) | 154 |
C12—H12···O2i | 1.00 | 2.39 | 3.3072 (19) | 152 |
C11—H11b···Cg2i | 0.98 | 2.83 | 3.533 (2) | 129 |
Symmetry code: (i) x−1, y, z. |
Cg2 is the centroid of the C2–C7 benzene ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9A···O2i | 0.98 | 2.53 | 3.438 (2) | 154 |
C12—H12···O2i | 1.00 | 2.39 | 3.3072 (19) | 152 |
C11—H11b···Cg2i | 0.98 | 2.83 | 3.533 (2) | 129 |
Symmetry code: (i) x−1, y, z. |
Acknowledgements
The X-ray centre of the Gyeongsang National University is acknowledged for providing access to the single-crystal diffractometer.
References
Akgul, Y. Y. & Anil, H. (2003). Phytochemistry, 63, 939–943. Web of Science CrossRef PubMed CAS Google Scholar
Aslam, S. N., Stevenson, P. C., Kokubun, T. & Hall, D. R. (2009). Microbiol. Res. 164, 191–195. Web of Science CrossRef PubMed CAS Google Scholar
Brandenburg, K. (1998). DIAMOND. Crystal Impact GbR, Bonn, Germany. Google Scholar
Bruker (2009). APEX2, SADABS and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Choi, H. D., Seo, P. J. & Son, B. W. (1999). J. Korean Chem. Soc. 43, 606–608. CAS Google Scholar
Choi, H. D., Seo, P. J., Son, B. W. & Lee, U. (2011). Acta Cryst. E67, o804. Web of Science CSD CrossRef IUCr Journals Google Scholar
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849–854. Web of Science CrossRef CAS IUCr Journals Google Scholar
Galal, S. A., Abd El-All, A. S., Abdallah, M. M. & El-Diwani, H. I. (2009). Bioorg. Med. Chem. Lett. 19, 2420–2428. Web of Science CrossRef PubMed CAS Google Scholar
Howlett, D. R., Perry, A. E., Godfrey, F., Swatton, J. E., Jennings, K. H., Spitzfaden, C., Wadsworth, H., Wood, S. J. & Markwell, R. E. (1999). Biochem. J. 340, 283–289. Web of Science CrossRef PubMed CAS Google Scholar
Khan, M. W., Alam, M. J., Rashid, M. A. & Chowdhury, R. (2005). Bioorg. Med. Chem. 13, 4796–4805. Web of Science CrossRef PubMed CAS Google Scholar
Ono, M., Kung, M. P., Hou, C. & Kung, H. F. (2002). Nucl. Med. Biol. 29, 633–642. Web of Science CrossRef PubMed CAS Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Soekamto, N. H., Achmad, S. A., Ghisalberti, E. L., Hakim, E. H. & Syah, Y. M. (2003). Phytochemistry, 64, 831–834. Web of Science CrossRef PubMed CAS Google Scholar
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Benzofuran compounds show significant pharmacological properties such as antibacterial and antifungal, antitumor and antiviral, antimicrobial activities (Aslam et al. 2009, Galal et al., 2009, Khan et al. , 2005), and inhibitor of β-amyloid aggregation (Howlett et al., 1999, Ono et al., 2002). These many benzofurans occur in a great number of natural products (Akgul & Anil, 2003, Soekamto et al., 2003). As a part of our ongoing project of 5-chloro-3-cyclohexylsulfinyl-1-benzofuran derivatives containing methyl substituent in 2-position (Choi et al., 2011), we report herein on the crystal structure of the title compound.
In the title molecule (Fig. 1), the benzofuran unit is essentially planar, with a mean deviation of 0.014 (1) Å from the least-squares plane defined by the nine constituent atoms. The cyclohexyl ring is in the chair form and the arylsulfinyl moiety is positioned equatorially relative to the cyclohexyl group. In the crystal structure (Fig. 2), molecules are linked by C—H···O and C—H···π hydrogen bonds (Table 1, Cg2 is the centroid of the C2–C7 benzene ring). The molecules are stacked along the a-axis. A Cl···π contact between the chlorine atom and the furan ring of an adjacent molecule, with Cl1···Cg1i [3.594 (2) Å] (Cg1 is the centroid of the C1/C2/C7/O1/C8 furan ring) is observed, compared to the van der Waals' separation of 3.55Å for these species.