organic compounds
5-Bromo-3-(4-chlorophenylsulfinyl)-2-methyl-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, C15H10BrClO2S, the 4-chlorophenyl ring is oriented approximately perpendicular to the mean plane of the benzofuran ring [dihedral angle = 89.55 (9)°]. In the crystal, molecules are linked through weak intermolecular C—H⋯O hydrogen bonds and and a Br⋯Br contact [3.783 (3) Å].
Related literature
For the biological activity of benzofuran compounds, see: Aslam et al. (2006); Galal et al. (2009); Khan et al. (2005). For natural products with benzofuran rings, see: Akgul & Anil (2003); Soekamto et al. (2003). For the structures of related 3-(4-chlorophenylsulfinyl)-2-methyl-1-benzofuran derivatives, see: Choi et al. (2010a,b).
Experimental
Crystal data
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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 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810038870/hg2719sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810038870/hg2719Isup2.hkl
77% 3-chloroperoxybenzoic acid (202 mg, 0.9 mmol) was added in small portions to a stirred solution of 5-bromo-3-(4-chlorophenylsulfanyl)-2-methyl-1-benzofuran (289 mg, 0.8 mmol) in dichloromethane (30 mL) at 273 K. After being stirred at room temperature for 5h, the mixture was washed with saturated sodium bicarbonate solution and the organic layer was separated, dried over magnesium sulfate, filtered and concentrated at reduced pressure. The residue was purified by
(silica gel, hexane–ethyl acetate, 1:1 v/v) to afford the title compound as a colorless solid [yield 83%, m.p. 404–405 K; Rf = 0.64 (hexane–ethyl acetate, 1:1 v/v)]. Single crystals suitable for X-ray diffraction were prepared by slow evaporation of a solution of the title compound in acetone at room temperature.All H atoms were positioned geometrically and refined using riding model, with C—H = 0.93 Å for aryl and 0.98 Å for methyl H atoms. Uiso(H) = 1.2Ueq(C) for aryl and 1.5Ueq(C) for methyl H atoms.
Many compounds involving a benzofuran skeleton have received much attention owing to their important pharmacological properties such as antifungal, antimicrobial, antitumor and antiviral activities (Aslam et al., 2006; Galal et al., 2009; Khan et al., 2005). These compounds widely occur in nature (Akgul & Anil, 2003; Soekamto et al., 2003). As a part of our study of the substituent effect on the solid state structures of 3-(4-chlorophenylsulfinyl)-2-methyl-1-benzofuran analogues (Choi et al., 2010a,b), we report herein on the
of the title compound.In the title molecule (Fig. 1). the benzofuran unit is essentially planar, with a mean deviation of 0.090 (2) Å from the least-squares plane defined by the nine constituent atoms. The 4-chlorophenyl ring makes a dihedral angle of 89.55 (9)° with the mean plane of the benzofuran fragment. The crystal packing (Fig. 2) is stabilized by weak intermolecular C—H···O hydrogen bonds; the first one between a methyl H atom and the oxygen of the S═O unit [C9—H9C···O2i; see Table 1], and the second one between the 4-chlorophenyl H atom and the oxygen of the S═O unit [C14—H14···O2ii; see Table 1], respectively. The crystal packing (Fig. 2) is further stabilized by an intermolecular a Br—Briii interaction at 3.783 (3) Å.
For the biological activity of benzofuran compounds, see: Aslam et al. (2006); Galal et al. (2009); Khan et al. (2005). For natural products with benzofuran rings, see: Akgul & Anil (2003); Soekamto et al. (2003). For the structures of related 3-(4-chlorophenylsulfinyl)-2-methyl-1-benzofuran derivatives, see: Choi et al. (2010a,b).
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 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C15H10BrClO2S | F(000) = 736 |
Mr = 369.65 | Dx = 1.684 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4598 reflections |
a = 11.530 (6) Å | θ = 2.4–27.8° |
b = 5.834 (3) Å | µ = 3.14 mm−1 |
c = 22.045 (13) Å | T = 173 K |
β = 100.602 (16)° | Block, colourless |
V = 1457.6 (15) Å3 | 0.20 × 0.16 × 0.15 mm |
Z = 4 |
Bruker SMART APEXII CCD diffractometer | 3169 independent reflections |
Radiation source: rotating anode | 2505 reflections with I > 2σ(I) |
Graphite multilayer monochromator | Rint = 0.054 |
Detector resolution: 10.0 pixels mm-1 | θmax = 27.0°, θmin = 1.8° |
φ and ω scans | h = −14→14 |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | k = −7→7 |
Tmin = 0.625, Tmax = 0.746 | l = −28→28 |
12344 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)] = 0.040 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0713P)2] where P = (Fo2 + 2Fc2)/3 |
3169 reflections | (Δ/σ)max = 0.001 |
182 parameters | Δρmax = 0.37 e Å−3 |
0 restraints | Δρmin = −0.61 e Å−3 |
C15H10BrClO2S | V = 1457.6 (15) Å3 |
Mr = 369.65 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 11.530 (6) Å | µ = 3.14 mm−1 |
b = 5.834 (3) Å | T = 173 K |
c = 22.045 (13) Å | 0.20 × 0.16 × 0.15 mm |
β = 100.602 (16)° |
Bruker SMART APEXII CCD diffractometer | 3169 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 2505 reflections with I > 2σ(I) |
Tmin = 0.625, Tmax = 0.746 | Rint = 0.054 |
12344 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.125 | H-atom parameters constrained |
S = 1.08 | Δρmax = 0.37 e Å−3 |
3169 reflections | Δρmin = −0.61 e Å−3 |
182 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 > 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 | ||
Br | 0.49545 (3) | 1.26359 (6) | 0.558213 (16) | 0.05190 (16) | |
Cl | 0.73989 (8) | 0.5654 (2) | 0.33164 (3) | 0.0649 (3) | |
S | 0.93528 (6) | 0.61437 (15) | 0.61528 (3) | 0.0386 (2) | |
O1 | 0.69728 (19) | 0.4763 (4) | 0.71682 (8) | 0.0423 (5) | |
O2 | 0.9809 (2) | 0.8550 (5) | 0.62575 (10) | 0.0516 (6) | |
C1 | 0.8083 (3) | 0.5913 (5) | 0.64826 (12) | 0.0345 (6) | |
C2 | 0.7048 (3) | 0.7367 (5) | 0.64045 (12) | 0.0328 (6) | |
C3 | 0.6625 (2) | 0.9187 (5) | 0.60174 (12) | 0.0344 (6) | |
H3 | 0.7039 | 0.9731 | 0.5711 | 0.041* | |
C4 | 0.5576 (3) | 1.0161 (5) | 0.61011 (12) | 0.0371 (6) | |
C5 | 0.4941 (3) | 0.9380 (6) | 0.65489 (13) | 0.0433 (7) | |
H5 | 0.4221 | 1.0104 | 0.6590 | 0.052* | |
C6 | 0.5362 (3) | 0.7563 (6) | 0.69289 (13) | 0.0453 (8) | |
H6 | 0.4950 | 0.7011 | 0.7235 | 0.054* | |
C7 | 0.6407 (3) | 0.6592 (6) | 0.68429 (12) | 0.0368 (6) | |
C8 | 0.7994 (3) | 0.4395 (5) | 0.69429 (12) | 0.0371 (7) | |
C9 | 0.8777 (4) | 0.2533 (6) | 0.72349 (16) | 0.0533 (9) | |
H9A | 0.9466 | 0.2421 | 0.7035 | 0.080* | |
H9B | 0.8346 | 0.1077 | 0.7189 | 0.080* | |
H9C | 0.9037 | 0.2870 | 0.7674 | 0.080* | |
C10 | 0.8689 (2) | 0.6021 (5) | 0.53503 (12) | 0.0300 (6) | |
C11 | 0.8105 (3) | 0.4075 (5) | 0.50999 (14) | 0.0451 (8) | |
H11 | 0.7987 | 0.2828 | 0.5359 | 0.054* | |
C12 | 0.7695 (3) | 0.3952 (6) | 0.44718 (15) | 0.0488 (8) | |
H12 | 0.7280 | 0.2639 | 0.4293 | 0.059* | |
C13 | 0.7902 (2) | 0.5784 (6) | 0.41089 (13) | 0.0390 (7) | |
C14 | 0.8486 (3) | 0.7708 (5) | 0.43509 (15) | 0.0434 (8) | |
H14 | 0.8616 | 0.8944 | 0.4091 | 0.052* | |
C15 | 0.8881 (3) | 0.7822 (5) | 0.49797 (14) | 0.0395 (7) | |
H15 | 0.9286 | 0.9148 | 0.5157 | 0.047* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br | 0.0453 (2) | 0.0542 (3) | 0.0552 (2) | 0.01571 (15) | 0.00677 (17) | 0.00300 (14) |
Cl | 0.0517 (5) | 0.1073 (8) | 0.0349 (4) | 0.0106 (5) | 0.0053 (4) | −0.0076 (4) |
S | 0.0285 (4) | 0.0529 (5) | 0.0344 (4) | 0.0028 (3) | 0.0059 (3) | 0.0022 (3) |
O1 | 0.0496 (13) | 0.0516 (13) | 0.0274 (9) | −0.0036 (11) | 0.0116 (9) | 0.0057 (8) |
O2 | 0.0441 (13) | 0.0659 (15) | 0.0450 (12) | −0.0217 (13) | 0.0090 (10) | −0.0112 (11) |
C1 | 0.0330 (15) | 0.0442 (17) | 0.0269 (12) | 0.0012 (13) | 0.0067 (11) | 0.0009 (11) |
C2 | 0.0307 (15) | 0.0414 (17) | 0.0263 (12) | −0.0052 (12) | 0.0054 (11) | −0.0035 (10) |
C3 | 0.0310 (14) | 0.0427 (17) | 0.0312 (13) | −0.0006 (13) | 0.0099 (11) | 0.0014 (11) |
C4 | 0.0320 (14) | 0.0464 (17) | 0.0323 (13) | 0.0004 (14) | 0.0040 (12) | −0.0075 (12) |
C5 | 0.0300 (15) | 0.064 (2) | 0.0374 (14) | 0.0020 (15) | 0.0105 (12) | −0.0127 (14) |
C6 | 0.0412 (18) | 0.068 (2) | 0.0301 (15) | −0.0078 (15) | 0.0159 (14) | −0.0050 (13) |
C7 | 0.0394 (16) | 0.0462 (17) | 0.0252 (12) | −0.0063 (14) | 0.0067 (12) | −0.0033 (12) |
C8 | 0.0436 (16) | 0.0414 (16) | 0.0257 (12) | −0.0029 (14) | 0.0046 (12) | −0.0003 (11) |
C9 | 0.068 (3) | 0.051 (2) | 0.0385 (16) | 0.0065 (16) | 0.0032 (17) | 0.0119 (13) |
C10 | 0.0256 (13) | 0.0325 (14) | 0.0334 (13) | 0.0047 (11) | 0.0096 (11) | 0.0010 (10) |
C11 | 0.054 (2) | 0.0348 (16) | 0.0470 (16) | −0.0054 (15) | 0.0095 (15) | 0.0040 (13) |
C12 | 0.052 (2) | 0.0419 (18) | 0.0496 (17) | −0.0068 (16) | 0.0025 (15) | −0.0083 (14) |
C13 | 0.0278 (14) | 0.058 (2) | 0.0336 (14) | 0.0102 (14) | 0.0110 (12) | −0.0027 (13) |
C14 | 0.0409 (18) | 0.052 (2) | 0.0395 (15) | 0.0005 (15) | 0.0137 (14) | 0.0109 (13) |
C15 | 0.0374 (17) | 0.0410 (17) | 0.0424 (15) | −0.0088 (13) | 0.0132 (14) | −0.0017 (12) |
Br—C4 | 1.899 (3) | C6—C7 | 1.376 (5) |
Br—Bri | 3.7826 (17) | C6—H6 | 0.9500 |
Cl—C13 | 1.738 (3) | C8—C9 | 1.482 (4) |
S—O2 | 1.502 (3) | C9—H9A | 0.9800 |
S—C1 | 1.756 (3) | C9—H9B | 0.9800 |
S—C10 | 1.795 (3) | C9—H9C | 0.9800 |
O1—C8 | 1.376 (4) | C10—C15 | 1.373 (4) |
O1—C7 | 1.381 (4) | C10—C11 | 1.382 (4) |
C1—C8 | 1.365 (4) | C11—C12 | 1.380 (4) |
C1—C2 | 1.448 (4) | C11—H11 | 0.9500 |
C2—C3 | 1.393 (4) | C12—C13 | 1.382 (5) |
C2—C7 | 1.395 (4) | C12—H12 | 0.9500 |
C3—C4 | 1.379 (4) | C13—C14 | 1.366 (5) |
C3—H3 | 0.9500 | C14—C15 | 1.379 (4) |
C4—C5 | 1.409 (4) | C14—H14 | 0.9500 |
C5—C6 | 1.383 (5) | C15—H15 | 0.9500 |
C5—H5 | 0.9500 | ||
C4—Br—Bri | 155.35 (9) | C1—C8—C9 | 132.5 (3) |
O2—S—C1 | 107.65 (14) | O1—C8—C9 | 116.8 (3) |
O2—S—C10 | 105.22 (13) | C8—C9—H9A | 109.5 |
C1—S—C10 | 99.69 (13) | C8—C9—H9B | 109.5 |
C8—O1—C7 | 106.7 (2) | H9A—C9—H9B | 109.5 |
C8—C1—C2 | 107.2 (3) | C8—C9—H9C | 109.5 |
C8—C1—S | 122.7 (2) | H9A—C9—H9C | 109.5 |
C2—C1—S | 129.6 (2) | H9B—C9—H9C | 109.5 |
C3—C2—C7 | 120.1 (3) | C15—C10—C11 | 120.7 (3) |
C3—C2—C1 | 135.0 (3) | C15—C10—S | 118.0 (2) |
C7—C2—C1 | 104.9 (2) | C11—C10—S | 120.9 (2) |
C4—C3—C2 | 116.6 (3) | C12—C11—C10 | 119.7 (3) |
C4—C3—H3 | 121.7 | C12—C11—H11 | 120.2 |
C2—C3—H3 | 121.7 | C10—C11—H11 | 120.2 |
C3—C4—C5 | 122.9 (3) | C11—C12—C13 | 118.5 (3) |
C3—C4—Br | 118.4 (2) | C11—C12—H12 | 120.8 |
C5—C4—Br | 118.7 (2) | C13—C12—H12 | 120.8 |
C6—C5—C4 | 120.1 (3) | C14—C13—C12 | 122.3 (3) |
C6—C5—H5 | 119.9 | C14—C13—Cl | 118.5 (2) |
C4—C5—H5 | 119.9 | C12—C13—Cl | 119.1 (2) |
C7—C6—C5 | 116.8 (3) | C13—C14—C15 | 118.7 (3) |
C7—C6—H6 | 121.6 | C13—C14—H14 | 120.7 |
C5—C6—H6 | 121.6 | C15—C14—H14 | 120.7 |
C6—C7—O1 | 126.1 (3) | C10—C15—C14 | 120.1 (3) |
C6—C7—C2 | 123.4 (3) | C10—C15—H15 | 120.0 |
O1—C7—C2 | 110.5 (3) | C14—C15—H15 | 120.0 |
C1—C8—O1 | 110.7 (3) | ||
O2—S—C1—C8 | −120.0 (3) | C1—C2—C7—O1 | −1.0 (3) |
C10—S—C1—C8 | 130.5 (2) | C2—C1—C8—O1 | 0.0 (3) |
O2—S—C1—C2 | 50.7 (3) | S—C1—C8—O1 | 172.54 (19) |
C10—S—C1—C2 | −58.8 (3) | C2—C1—C8—C9 | −178.9 (3) |
C8—C1—C2—C3 | −179.5 (3) | S—C1—C8—C9 | −6.4 (5) |
S—C1—C2—C3 | 8.7 (5) | C7—O1—C8—C1 | −0.7 (3) |
C8—C1—C2—C7 | 0.6 (3) | C7—O1—C8—C9 | 178.4 (3) |
S—C1—C2—C7 | −171.2 (2) | O2—S—C10—C15 | 10.8 (3) |
C7—C2—C3—C4 | 1.0 (4) | C1—S—C10—C15 | 122.2 (2) |
C1—C2—C3—C4 | −178.9 (3) | O2—S—C10—C11 | −175.8 (2) |
C2—C3—C4—C5 | −0.4 (4) | C1—S—C10—C11 | −64.3 (3) |
C2—C3—C4—Br | −179.6 (2) | C15—C10—C11—C12 | −0.9 (5) |
C3—C4—C5—C6 | 0.0 (5) | S—C10—C11—C12 | −174.2 (3) |
Br—C4—C5—C6 | 179.2 (2) | C10—C11—C12—C13 | 1.1 (5) |
C4—C5—C6—C7 | −0.2 (4) | C11—C12—C13—C14 | −0.7 (5) |
C5—C6—C7—O1 | −179.5 (3) | C11—C12—C13—Cl | 179.7 (3) |
C5—C6—C7—C2 | 0.8 (5) | C12—C13—C14—C15 | 0.0 (5) |
C8—O1—C7—C6 | −178.6 (3) | Cl—C13—C14—C15 | 179.7 (3) |
C8—O1—C7—C2 | 1.1 (3) | C11—C10—C15—C14 | 0.3 (5) |
C3—C2—C7—C6 | −1.3 (4) | S—C10—C15—C14 | 173.8 (3) |
C1—C2—C7—C6 | 178.7 (3) | C13—C14—C15—C10 | 0.2 (5) |
C3—C2—C7—O1 | 179.0 (2) |
Symmetry code: (i) −x+1, −y+3, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9C···O2ii | 0.98 | 2.51 | 3.473 (5) | 166 |
C14—H14···O2iii | 0.95 | 2.56 | 3.376 (4) | 145 |
Symmetry codes: (ii) −x+2, y−1/2, −z+3/2; (iii) −x+2, −y+2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C15H10BrClO2S |
Mr | 369.65 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 173 |
a, b, c (Å) | 11.530 (6), 5.834 (3), 22.045 (13) |
β (°) | 100.602 (16) |
V (Å3) | 1457.6 (15) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 3.14 |
Crystal size (mm) | 0.20 × 0.16 × 0.15 |
Data collection | |
Diffractometer | Bruker SMART APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.625, 0.746 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12344, 3169, 2505 |
Rint | 0.054 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.125, 1.08 |
No. of reflections | 3169 |
No. of parameters | 182 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.37, −0.61 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997) and DIAMOND (Brandenburg, 1998).
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9C···O2i | 0.98 | 2.51 | 3.473 (5) | 166.1 |
C14—H14···O2ii | 0.95 | 2.56 | 3.376 (4) | 144.6 |
Symmetry codes: (i) −x+2, y−1/2, −z+3/2; (ii) −x+2, −y+2, −z+1. |
References
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Many compounds involving a benzofuran skeleton have received much attention owing to their important pharmacological properties such as antifungal, antimicrobial, antitumor and antiviral activities (Aslam et al., 2006; Galal et al., 2009; Khan et al., 2005). These compounds widely occur in nature (Akgul & Anil, 2003; Soekamto et al., 2003). As a part of our study of the substituent effect on the solid state structures of 3-(4-chlorophenylsulfinyl)-2-methyl-1-benzofuran analogues (Choi et al., 2010a,b), 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 0.090 (2) Å from the least-squares plane defined by the nine constituent atoms. The 4-chlorophenyl ring makes a dihedral angle of 89.55 (9)° with the mean plane of the benzofuran fragment. The crystal packing (Fig. 2) is stabilized by weak intermolecular C—H···O hydrogen bonds; the first one between a methyl H atom and the oxygen of the S═O unit [C9—H9C···O2i; see Table 1], and the second one between the 4-chlorophenyl H atom and the oxygen of the S═O unit [C14—H14···O2ii; see Table 1], respectively. The crystal packing (Fig. 2) is further stabilized by an intermolecular a Br—Briii interaction at 3.783 (3) Å.