organic compounds
1-(1-Benzofuran-2-yl)-3-(4-chlorophenyl)prop-2-en-1-one
aDepartment of Physics, Yuvaraja's College (Constituent College), University of Mysore, Mysore 570 005, Karnataka, India, bDepartment of Physics, Sri D. Devaraj urs. First Grade College, Hunsur 571 105, Karnataka, India, and cDepartment of Chemistry, St. Philomena's College, Mysore 570 015, Karnataka, India
*Correspondence e-mail: devarajegowda@yahoo.com
In the title compound, C17H11ClO2, the benzofuran ring system is almost planar (r.m.s. deviation = 0.011 Å) and forms a dihedral angle of 10.53 (6)° with the chlorophenyl ring. No significant intermolecular interactions are observed.
Related literature
For general background to chalcone, see: Dhar (1981). For the biological properties of benzofuran derivatives, see: Nasef et al. (1992); Bogolyubsakaya & Perovich (1964); Deshmukh et al. (2004); Stanislav et al. (2000); Brady et al. (1973); Kamal et al. (2006); Alejandro et al. (2008); Rajesh et al. (2006). For related structures, see: Devarajegowda et al. (2001); Kant et al. (2009).
Experimental
Crystal data
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Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); 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); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S1600536810003004/ci5024sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810003004/ci5024Isup2.hkl
A mixture of 2-acetylbenzofuran (0.01 mol) and p-chlorobenzaldehyde (0.01 mol) in ethanol (20 ml) was stirred for 24 h in aqueous NaOH (8 ml). It was then diluted with water (100 ml) and acidified with concentrated HCl. The course of the reaction was monitored by TLC using chloroform-carbon disulfide (1:1). The product obtained was filtered, washed with water and recrystallised from ethanol (m.p. 398 K). Spectral data IR (KBr) cm-1: 1650 (C═O), 1620 (C═C stretching in aromatic), 1080 (C-O-C of benzofuran). 1H NMR (CDCl3): 6.67-7.2 (m, 9H, Ar-H), 6.70 (d, 1H, -COCH=), 8.60 (d, 1H, =CH-Ar).
H atoms were positioned at calculated positions [C-H = 0.93 Å] and refined using a riding model with Uiso(H) = 1.2Ueq(C).
Chalcones have been recognized as a significant field of study for a long time because of a variety of biological activities as well as they serve as intermediates in the synthesis of a variety of
Several heterocyclic analogues of have been reported to possess antibacterial, bacteriostatic tuberculostatic, insecticidal, antiparasitic, coronary vasodilating and choleretic activities (Dhar, 1981). Further, benzofuran derivatives have been reported to possess sedative and hypnotic (Nasef et al., 1992), antiinflammatory (Bogolyubsakaya & Perovich, 1964), antidepressant (Deshmukh et al., 2004), analgesic (Stanislav et al., 2000), hypoglycemic (Brady et al., 1973), anticonvulsant (Kamal et al., 2006), antibacterial (Alejandro et al., 2008) and antifungal activities (Rajesh et al., 2006). Owing to these biological activities of benzofuran propenones and in an attempt to study the structure-activity relationship of benzofuran and related systems, it was contemplated to synthesize benzofuryl propenones and the of one of them, the title compound, is reported.The benzofuran ring system is almost planar (r.m.s. deviation 0.011 Å). The dihedral angle between the benzofuran ring system and the chlorophenyl ring is 10.53 (6)°. Bond distances within the aromatic rings are in agreement with those observed in related structures (Devarajegowda et al., 2001; Kant et al., 2009).
For general background to chalcone, see: Dhar (1981). For the biological properties of benzofuran derivatives, see: Nasef et al. (1992); Bogolyubsakaya & Perovich (1964); Deshmukh et al. (2004); Stanislav et al. (2000); Brady et al. (1973); Kamal et al. (2006); Alejandro et al. (2008); Rajesh et al. (2006). For related structures, see: Devarajegowda et al. (2001); Kant et al. (2009).
Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. The molecular structure of the title compound. Displacement ellipsoids are drawn at the 50% probability level. |
C17H11ClO2 | F(000) = 584 |
Mr = 282.71 | Dx = 1.404 Mg m−3 |
Monoclinic, P21/c | Melting point: 398 K |
Hall symbol: -P 2ybc | Mo Kα radiation, λ = 0.71073 Å |
a = 15.9034 (12) Å | Cell parameters from 3323 reflections |
b = 14.1393 (12) Å | θ = 1.3–28.4° |
c = 5.9572 (5) Å | µ = 0.28 mm−1 |
β = 93.039 (4)° | T = 293 K |
V = 1337.67 (19) Å3 | Plate, white |
Z = 4 | 0.22 × 0.20 × 0.10 mm |
Bruker SMART CCD area-detector diffractometer | 3323 independent reflections |
Radiation source: fine-focus sealed tube | 2665 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
ω and φ scans | θmax = 28.4°, θmin = 1.3° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | h = −21→20 |
Tmin = 0.940, Tmax = 0.972 | k = −18→18 |
12871 measured reflections | l = −7→7 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.040 | H-atom parameters constrained |
wR(F2) = 0.115 | w = 1/[σ2(Fo2) + (0.0527P)2 + 0.3221P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max = 0.001 |
3323 reflections | Δρmax = 0.21 e Å−3 |
182 parameters | Δρmin = −0.24 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0117 (16) |
C17H11ClO2 | V = 1337.67 (19) Å3 |
Mr = 282.71 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 15.9034 (12) Å | µ = 0.28 mm−1 |
b = 14.1393 (12) Å | T = 293 K |
c = 5.9572 (5) Å | 0.22 × 0.20 × 0.10 mm |
β = 93.039 (4)° |
Bruker SMART CCD area-detector diffractometer | 3323 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2004) | 2665 reflections with I > 2σ(I) |
Tmin = 0.940, Tmax = 0.972 | Rint = 0.026 |
12871 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 0 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.21 e Å−3 |
3323 reflections | Δρmin = −0.24 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 | ||
C1 | 1.22464 (9) | 0.64723 (11) | 0.5466 (3) | 0.0508 (4) | |
H1 | 1.1909 | 0.6671 | 0.4232 | 0.061* | |
C2 | 1.31402 (10) | 0.64001 (11) | 0.5583 (2) | 0.0497 (3) | |
C3 | 1.37837 (12) | 0.65858 (13) | 0.4117 (3) | 0.0628 (4) | |
H3 | 1.3660 | 0.6820 | 0.2679 | 0.075* | |
C4 | 1.45972 (12) | 0.64125 (15) | 0.4865 (3) | 0.0717 (5) | |
H4 | 1.5031 | 0.6535 | 0.3920 | 0.086* | |
C5 | 1.47890 (11) | 0.60577 (15) | 0.7004 (3) | 0.0692 (5) | |
H5 | 1.5349 | 0.5939 | 0.7447 | 0.083* | |
C6 | 1.41797 (10) | 0.58781 (13) | 0.8476 (3) | 0.0595 (4) | |
H6 | 1.4311 | 0.5644 | 0.9911 | 0.071* | |
C7 | 1.33559 (9) | 0.60625 (11) | 0.7727 (2) | 0.0485 (3) | |
C8 | 1.19823 (9) | 0.62016 (11) | 0.7456 (3) | 0.0517 (4) | |
C9 | 1.11355 (10) | 0.61170 (12) | 0.8310 (3) | 0.0540 (4) | |
C10 | 1.04368 (10) | 0.62421 (13) | 0.6625 (3) | 0.0560 (4) | |
H10 | 1.0546 | 0.6508 | 0.5242 | 0.067* | |
C11 | 0.96572 (9) | 0.59891 (11) | 0.7013 (3) | 0.0493 (3) | |
H11 | 0.9572 | 0.5719 | 0.8407 | 0.059* | |
C12 | 0.89149 (8) | 0.60906 (10) | 0.5471 (2) | 0.0440 (3) | |
C13 | 0.81273 (9) | 0.58296 (11) | 0.6193 (2) | 0.0480 (3) | |
H13 | 0.8090 | 0.5549 | 0.7596 | 0.058* | |
C14 | 0.74015 (9) | 0.59803 (11) | 0.4862 (3) | 0.0501 (3) | |
H14 | 0.6879 | 0.5812 | 0.5368 | 0.060* | |
C15 | 0.74645 (9) | 0.63839 (11) | 0.2773 (2) | 0.0473 (3) | |
C16 | 0.82376 (9) | 0.66272 (11) | 0.1978 (2) | 0.0493 (3) | |
H16 | 0.8271 | 0.6888 | 0.0553 | 0.059* | |
C17 | 0.89576 (9) | 0.64786 (11) | 0.3322 (2) | 0.0489 (3) | |
H17 | 0.9479 | 0.6638 | 0.2792 | 0.059* | |
O1 | 1.26490 (6) | 0.59456 (8) | 0.89122 (17) | 0.0552 (3) | |
O2 | 1.10294 (8) | 0.59470 (11) | 1.0286 (2) | 0.0755 (4) | |
Cl1 | 0.65624 (3) | 0.66004 (4) | 0.10847 (8) | 0.06940 (17) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0515 (8) | 0.0488 (8) | 0.0506 (8) | 0.0031 (6) | −0.0110 (6) | 0.0007 (6) |
C2 | 0.0542 (8) | 0.0455 (8) | 0.0481 (8) | 0.0008 (6) | −0.0081 (6) | −0.0025 (6) |
C3 | 0.0775 (11) | 0.0621 (10) | 0.0489 (8) | 0.0026 (8) | 0.0042 (8) | 0.0027 (7) |
C4 | 0.0633 (11) | 0.0824 (13) | 0.0706 (11) | −0.0021 (9) | 0.0149 (9) | −0.0053 (10) |
C5 | 0.0491 (8) | 0.0854 (13) | 0.0723 (11) | 0.0035 (8) | −0.0041 (8) | −0.0112 (10) |
C6 | 0.0537 (8) | 0.0719 (11) | 0.0515 (8) | 0.0067 (8) | −0.0108 (7) | −0.0022 (8) |
C7 | 0.0486 (7) | 0.0495 (8) | 0.0466 (7) | −0.0014 (6) | −0.0050 (6) | −0.0008 (6) |
C8 | 0.0480 (7) | 0.0488 (8) | 0.0567 (8) | 0.0013 (6) | −0.0114 (6) | −0.0001 (7) |
C9 | 0.0519 (8) | 0.0550 (9) | 0.0541 (9) | −0.0010 (7) | −0.0061 (6) | 0.0060 (7) |
C10 | 0.0483 (8) | 0.0646 (10) | 0.0544 (9) | 0.0013 (7) | −0.0038 (6) | 0.0095 (7) |
C11 | 0.0496 (7) | 0.0517 (8) | 0.0462 (7) | 0.0034 (6) | −0.0015 (6) | 0.0019 (6) |
C12 | 0.0445 (7) | 0.0425 (7) | 0.0450 (7) | 0.0025 (6) | 0.0014 (5) | −0.0011 (6) |
C13 | 0.0502 (7) | 0.0496 (8) | 0.0444 (7) | −0.0016 (6) | 0.0041 (6) | 0.0045 (6) |
C14 | 0.0442 (7) | 0.0533 (9) | 0.0530 (8) | −0.0057 (6) | 0.0052 (6) | 0.0002 (7) |
C15 | 0.0456 (7) | 0.0467 (8) | 0.0490 (7) | −0.0011 (6) | −0.0042 (6) | −0.0034 (6) |
C16 | 0.0529 (8) | 0.0536 (8) | 0.0414 (7) | −0.0046 (6) | 0.0013 (6) | 0.0026 (6) |
C17 | 0.0444 (7) | 0.0559 (9) | 0.0468 (7) | −0.0025 (6) | 0.0061 (6) | −0.0008 (6) |
O1 | 0.0499 (6) | 0.0655 (7) | 0.0491 (6) | 0.0006 (5) | −0.0073 (4) | 0.0076 (5) |
O2 | 0.0602 (7) | 0.1083 (11) | 0.0573 (7) | −0.0042 (7) | −0.0050 (5) | 0.0175 (7) |
Cl1 | 0.0526 (2) | 0.0844 (3) | 0.0690 (3) | −0.00645 (19) | −0.01679 (19) | 0.0098 (2) |
C1—C8 | 1.335 (2) | C9—C10 | 1.468 (2) |
C1—C2 | 1.423 (2) | C10—C11 | 1.323 (2) |
C1—H1 | 0.93 | C10—H10 | 0.93 |
C2—C7 | 1.389 (2) | C11—C12 | 1.4641 (19) |
C2—C3 | 1.405 (2) | C11—H11 | 0.93 |
C3—C4 | 1.368 (3) | C12—C13 | 1.3954 (19) |
C3—H3 | 0.93 | C12—C17 | 1.398 (2) |
C4—C5 | 1.388 (3) | C13—C14 | 1.382 (2) |
C4—H4 | 0.93 | C13—H13 | 0.93 |
C5—C6 | 1.365 (3) | C14—C15 | 1.377 (2) |
C5—H5 | 0.93 | C14—H14 | 0.93 |
C6—C7 | 1.386 (2) | C15—C16 | 1.384 (2) |
C6—H6 | 0.93 | C15—Cl1 | 1.7352 (15) |
C7—O1 | 1.3690 (18) | C16—C17 | 1.378 (2) |
C8—O1 | 1.3820 (17) | C16—H16 | 0.93 |
C8—C9 | 1.469 (2) | C17—H17 | 0.93 |
C9—O2 | 1.2216 (19) | ||
C8—C1—C2 | 107.24 (13) | C10—C9—C8 | 115.33 (14) |
C8—C1—H1 | 126.4 | C11—C10—C9 | 122.03 (15) |
C2—C1—H1 | 126.4 | C11—C10—H10 | 119.0 |
C7—C2—C3 | 118.89 (14) | C9—C10—H10 | 119.0 |
C7—C2—C1 | 105.49 (14) | C10—C11—C12 | 126.58 (15) |
C3—C2—C1 | 135.61 (15) | C10—C11—H11 | 116.7 |
C4—C3—C2 | 118.14 (16) | C12—C11—H11 | 116.7 |
C4—C3—H3 | 120.9 | C13—C12—C17 | 118.30 (13) |
C2—C3—H3 | 120.9 | C13—C12—C11 | 119.20 (13) |
C3—C4—C5 | 121.44 (17) | C17—C12—C11 | 122.45 (13) |
C3—C4—H4 | 119.3 | C14—C13—C12 | 121.23 (13) |
C5—C4—H4 | 119.3 | C14—C13—H13 | 119.4 |
C6—C5—C4 | 121.88 (17) | C12—C13—H13 | 119.4 |
C6—C5—H5 | 119.1 | C15—C14—C13 | 118.93 (13) |
C4—C5—H5 | 119.1 | C15—C14—H14 | 120.5 |
C5—C6—C7 | 116.70 (16) | C13—C14—H14 | 120.5 |
C5—C6—H6 | 121.7 | C14—C15—C16 | 121.37 (13) |
C7—C6—H6 | 121.7 | C14—C15—Cl1 | 119.95 (12) |
O1—C7—C6 | 126.81 (14) | C16—C15—Cl1 | 118.68 (11) |
O1—C7—C2 | 110.25 (12) | C17—C16—C15 | 119.29 (13) |
C6—C7—C2 | 122.94 (15) | C17—C16—H16 | 120.4 |
C1—C8—O1 | 111.44 (14) | C15—C16—H16 | 120.4 |
C1—C8—C9 | 131.92 (14) | C16—C17—C12 | 120.83 (13) |
O1—C8—C9 | 116.62 (14) | C16—C17—H17 | 119.6 |
O2—C9—C10 | 122.98 (15) | C12—C17—H17 | 119.6 |
O2—C9—C8 | 121.69 (14) | C7—O1—C8 | 105.57 (12) |
C8—C1—C2—C7 | 0.86 (17) | O2—C9—C10—C11 | −14.3 (3) |
C8—C1—C2—C3 | −178.91 (18) | C8—C9—C10—C11 | 165.10 (16) |
C7—C2—C3—C4 | 0.8 (2) | C9—C10—C11—C12 | 179.27 (15) |
C1—C2—C3—C4 | −179.41 (18) | C10—C11—C12—C13 | −176.76 (16) |
C2—C3—C4—C5 | 0.4 (3) | C10—C11—C12—C17 | 0.4 (3) |
C3—C4—C5—C6 | −1.0 (3) | C17—C12—C13—C14 | −2.4 (2) |
C4—C5—C6—C7 | 0.4 (3) | C11—C12—C13—C14 | 174.96 (14) |
C5—C6—C7—O1 | −179.32 (16) | C12—C13—C14—C15 | 0.9 (2) |
C5—C6—C7—C2 | 0.9 (3) | C13—C14—C15—C16 | 0.9 (2) |
C3—C2—C7—O1 | 178.67 (14) | C13—C14—C15—Cl1 | −178.88 (12) |
C1—C2—C7—O1 | −1.15 (17) | C14—C15—C16—C17 | −1.2 (2) |
C3—C2—C7—C6 | −1.5 (2) | Cl1—C15—C16—C17 | 178.57 (12) |
C1—C2—C7—C6 | 178.64 (15) | C15—C16—C17—C12 | −0.3 (2) |
C2—C1—C8—O1 | −0.28 (18) | C13—C12—C17—C16 | 2.0 (2) |
C2—C1—C8—C9 | −179.04 (16) | C11—C12—C17—C16 | −175.20 (14) |
C1—C8—C9—O2 | −172.20 (18) | C6—C7—O1—C8 | −178.80 (16) |
O1—C8—C9—O2 | 9.1 (2) | C2—C7—O1—C8 | 0.98 (16) |
C1—C8—C9—C10 | 8.3 (3) | C1—C8—O1—C7 | −0.42 (17) |
O1—C8—C9—C10 | −170.36 (14) | C9—C8—O1—C7 | 178.55 (13) |
Experimental details
Crystal data | |
Chemical formula | C17H11ClO2 |
Mr | 282.71 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 293 |
a, b, c (Å) | 15.9034 (12), 14.1393 (12), 5.9572 (5) |
β (°) | 93.039 (4) |
V (Å3) | 1337.67 (19) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.28 |
Crystal size (mm) | 0.22 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2004) |
Tmin, Tmax | 0.940, 0.972 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12871, 3323, 2665 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.115, 1.02 |
No. of reflections | 3323 |
No. of parameters | 182 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.21, −0.24 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997).
Acknowledgements
The authors thank Professor T. N. Guru Row and Miss Brinda Selvaraj, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, for their help with the data collection.
References
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Chalcones have been recognized as a significant field of study for a long time because of a variety of biological activities as well as they serve as intermediates in the synthesis of a variety of heterocyclic compounds. Several heterocyclic analogues of chalcones have been reported to possess antibacterial, bacteriostatic tuberculostatic, insecticidal, antiparasitic, coronary vasodilating and choleretic activities (Dhar, 1981). Further, benzofuran derivatives have been reported to possess sedative and hypnotic (Nasef et al., 1992), antiinflammatory (Bogolyubsakaya & Perovich, 1964), antidepressant (Deshmukh et al., 2004), analgesic (Stanislav et al., 2000), hypoglycemic (Brady et al., 1973), anticonvulsant (Kamal et al., 2006), antibacterial (Alejandro et al., 2008) and antifungal activities (Rajesh et al., 2006). Owing to these biological activities of benzofuran propenones and in an attempt to study the structure-activity relationship of benzofuran and related systems, it was contemplated to synthesize benzofuryl propenones and the crystal structure of one of them, the title compound, is reported.
The benzofuran ring system is almost planar (r.m.s. deviation 0.011 Å). The dihedral angle between the benzofuran ring system and the chlorophenyl ring is 10.53 (6)°. Bond distances within the aromatic rings are in agreement with those observed in related structures (Devarajegowda et al., 2001; Kant et al., 2009).