organic compounds
5-Benzoyl-2-(1H-indol-3-yl)-4-(4-methylphenyl)-4,5-dihydrofuran-3-carbonitrile
aDepartment of Physics, The Madura College, Madurai 625 011, India, bDepartment of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India, and cDepartment of Food Science and Technology, University of Ruhuna, Mapalana, Kamburupitiya 81100, Sri Lanka
*Correspondence e-mail: plakshmannilantha@ymail.com
The furan ring in the title compound, C27H20N2O2, adopts a twisted conformation about the sp3—sp3 bond. The molecular structure is stabilized by an intramolecular C—H⋯O interaction which generates an S(6) ring motif. The crystal packing is stabilized by N—H⋯O and C—H⋯O interactions generating centrosymmetric R22(18) and C(6) chain motifs, respectively. A weak C—H⋯π interaction is also observed.
Related literature
For the biological importance of furan derivatives, see: Auvin & Chabrier De Lassauniere (2005). For hydrogen-bonding graph-set notation, see: Bernstein et al. (1995). For additional conformation analysis, see: Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2004); cell SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supporting information
10.1107/S1600536812011105/tk5068sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812011105/tk5068Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812011105/tk5068Isup3.cml
To a stirred mixture of 2-(1H-indole-3-carbonyl)-3-p-tolylacrylonitrile (1.0 molar eq.) and phenacylpyridinium bromide (1.0 molar eq.) in water (10 ml) was added drop wise triethylamine (0.25 molar eq.) at room temperature. The resulting clear solution, that slowly became turbid, was stirred at room temperature for 1 h. Then, the separated free flowing solid was filtered and washed with methanol (3 ml) to afford the title compound as a pale-yellow solid. The product thus obtained was recrystallized from an EtOH-EtOAc mixture (1:1 ratio v/v ml) to the give pure compound as pale-yellow crystals. Yield: 92%. M.pt: 502 K.
The H atoms were placed at calculated positions and allowed to ride on their carrier atoms with C—H = 0.93–0.98 Å, and with Uiso = 1.2–1.5Ueq(C). The N-bound H atom was located in a difference Fourier map and refined freely.
Furanyl derivatives have calplain-inhibiting activity and are used in the preparation of medicaments for the treatment of inflammatory and immunological diseases, cardiovascular and cerebro-vascular diseases, disorders of the central or peripheral nervous system, cachexia, osteoporosis, muscular dystrophy, proliferative diseases, cataracts, rejection reactions following organ transplants and auto-immune and viral diseases (Auvin et al., 2005). The high medicinal value of these compounds in conjunction with our research interests prompted us to synthesize and report the X-ray structure of the title compound.
In the title compound (Fig 1), the five-membered furanyl ring adopts a twisted conformation as evident from the puckering parameters (Cremer & Pople, 1975) Q = 0.192 (2) Å and φ = 129.0 (6)°. The five-(N2/C38/C31/C32/C37) and six-membered (C32—C37) rings in the indole group are planar, with a dihedral angle of 0.74 (1)° between them. The dihedral angle between the phenyl rings (C42—C47 and C51—C56) is 15.24 (1)°.
Fig. 2 shows the partial packing of molecules in the π interaction, viz, C34—H34···Cg1ii, Table 1.
The C—H···O and N—H···O intermolecular interactions generate C11(6) chain and centrosymmetric R22(18) motifs, respectively (Bernstein et al., 1995). In addition, there is a weak C—H···For the biological importance of furan derivatives, see: Auvin & Chabrier De Lassauniere (2005). For hydrogen-bonding graph-set notation, see: Bernstein et al. (1995). For additional conformation analysis, see: Cremer & Pople (1975).
Data collection: APEX2 (Bruker, 2004); cell
SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).C27H20N2O2 | F(000) = 848 |
Mr = 404.45 | Dx = 1.295 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2000 reflections |
a = 9.8084 (4) Å | θ = 2–31° |
b = 15.9553 (7) Å | µ = 0.08 mm−1 |
c = 13.8782 (7) Å | T = 293 K |
β = 107.185 (2)° | Block, pale-yellow |
V = 2074.92 (16) Å3 | 0.19 × 0.15 × 0.12 mm |
Z = 4 |
Bruker Kappa APEXII diffractometer | 4647 independent reflections |
Radiation source: fine-focus sealed tube | 3017 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.038 |
Detector resolution: 0 pixels mm-1 | θmax = 27.3°, θmin = 2.0° |
ω and φ scans | h = −12→12 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | k = −20→20 |
Tmin = 0.967, Tmax = 0.974 | l = −17→17 |
21144 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)] = 0.045 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.133 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0581P)2 + 0.5454P] where P = (Fo2 + 2Fc2)/3 |
4647 reflections | (Δ/σ)max < 0.001 |
284 parameters | Δρmax = 0.25 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C27H20N2O2 | V = 2074.92 (16) Å3 |
Mr = 404.45 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 9.8084 (4) Å | µ = 0.08 mm−1 |
b = 15.9553 (7) Å | T = 293 K |
c = 13.8782 (7) Å | 0.19 × 0.15 × 0.12 mm |
β = 107.185 (2)° |
Bruker Kappa APEXII diffractometer | 4647 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3017 reflections with I > 2σ(I) |
Tmin = 0.967, Tmax = 0.974 | Rint = 0.038 |
21144 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | 0 restraints |
wR(F2) = 0.133 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.02 | Δρmax = 0.25 e Å−3 |
4647 reflections | Δρmin = −0.22 e Å−3 |
284 parameters |
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. |
x | y | z | Uiso*/Ueq | ||
H2 | 1.231 (2) | −0.0946 (12) | 0.5116 (14) | 0.044 (5)* | |
C1 | 0.7913 (2) | −0.08013 (11) | 0.21842 (13) | 0.0408 (4) | |
C2 | 0.78765 (18) | 0.00744 (10) | 0.23169 (12) | 0.0331 (4) | |
C3 | 0.88408 (17) | 0.05202 (10) | 0.30178 (12) | 0.0301 (4) | |
C4 | 0.71584 (17) | 0.14707 (10) | 0.22283 (12) | 0.0318 (4) | |
H4 | 0.7178 | 0.1947 | 0.1787 | 0.038* | |
C5 | 0.68263 (18) | 0.06474 (10) | 0.15994 (12) | 0.0314 (4) | |
H5 | 0.5848 | 0.0465 | 0.1531 | 0.038* | |
C6 | 0.7683 (3) | 0.09390 (17) | −0.23642 (17) | 0.0734 (7) | |
H6A | 0.8681 | 0.0883 | −0.2296 | 0.110* | |
H6B | 0.7350 | 0.1474 | −0.2658 | 0.110* | |
H6C | 0.7163 | 0.0501 | −0.2791 | 0.110* | |
C31 | 1.01403 (17) | 0.02910 (10) | 0.37695 (12) | 0.0310 (4) | |
C32 | 1.12543 (17) | 0.08399 (11) | 0.43391 (12) | 0.0325 (4) | |
C33 | 1.14643 (19) | 0.17039 (11) | 0.44071 (14) | 0.0405 (4) | |
H33 | 1.0781 | 0.2066 | 0.4014 | 0.049* | |
C34 | 1.2696 (2) | 0.20113 (13) | 0.50646 (16) | 0.0535 (5) | |
H34 | 1.2841 | 0.2588 | 0.5116 | 0.064* | |
C35 | 1.3735 (2) | 0.14808 (14) | 0.56565 (17) | 0.0615 (6) | |
H35 | 1.4558 | 0.1709 | 0.6097 | 0.074* | |
C36 | 1.3567 (2) | 0.06253 (14) | 0.56019 (15) | 0.0527 (5) | |
H36 | 1.4263 | 0.0268 | 0.5991 | 0.063* | |
C37 | 1.23189 (18) | 0.03164 (11) | 0.49441 (13) | 0.0367 (4) | |
C38 | 1.05756 (18) | −0.05100 (11) | 0.40606 (13) | 0.0357 (4) | |
H38 | 1.0052 | −0.0992 | 0.3819 | 0.043* | |
C41 | 0.60327 (18) | 0.16108 (10) | 0.27659 (13) | 0.0337 (4) | |
C42 | 0.45710 (18) | 0.18082 (11) | 0.21168 (13) | 0.0372 (4) | |
C43 | 0.4312 (2) | 0.21107 (12) | 0.11489 (14) | 0.0463 (5) | |
H43 | 0.5073 | 0.2244 | 0.0906 | 0.056* | |
C44 | 0.2925 (2) | 0.22178 (14) | 0.05363 (17) | 0.0619 (6) | |
H44 | 0.2753 | 0.2419 | −0.0118 | 0.074* | |
C45 | 0.1806 (3) | 0.20254 (16) | 0.0902 (2) | 0.0759 (8) | |
H45 | 0.0873 | 0.2089 | 0.0490 | 0.091* | |
C46 | 0.2051 (3) | 0.17414 (18) | 0.1867 (2) | 0.0786 (8) | |
H46 | 0.1287 | 0.1622 | 0.2112 | 0.094* | |
C47 | 0.3427 (2) | 0.16313 (14) | 0.24769 (17) | 0.0574 (6) | |
H47 | 0.3589 | 0.1437 | 0.3133 | 0.069* | |
C51 | 0.70509 (18) | 0.07130 (10) | 0.05677 (12) | 0.0320 (4) | |
C52 | 0.59093 (19) | 0.08565 (11) | −0.02828 (13) | 0.0380 (4) | |
H52 | 0.4993 | 0.0900 | −0.0222 | 0.046* | |
C53 | 0.6116 (2) | 0.09362 (12) | −0.12209 (14) | 0.0447 (5) | |
H53 | 0.5334 | 0.1032 | −0.1782 | 0.054* | |
C54 | 0.7455 (2) | 0.08765 (12) | −0.13439 (15) | 0.0465 (5) | |
C55 | 0.8592 (2) | 0.07429 (13) | −0.04929 (16) | 0.0503 (5) | |
H55 | 0.9509 | 0.0707 | −0.0555 | 0.060* | |
C56 | 0.8396 (2) | 0.06610 (12) | 0.04483 (14) | 0.0426 (4) | |
H56 | 0.9181 | 0.0570 | 0.1009 | 0.051* | |
N1 | 0.7928 (2) | −0.15113 (11) | 0.20826 (15) | 0.0670 (6) | |
N2 | 1.18746 (16) | −0.04969 (10) | 0.47495 (11) | 0.0387 (4) | |
O1 | 0.85398 (12) | 0.13585 (7) | 0.29520 (9) | 0.0369 (3) | |
O2 | 0.62895 (14) | 0.14959 (8) | 0.36623 (9) | 0.0452 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0479 (11) | 0.0332 (10) | 0.0347 (10) | 0.0026 (8) | 0.0019 (8) | −0.0008 (8) |
C2 | 0.0382 (9) | 0.0284 (8) | 0.0297 (9) | 0.0029 (7) | 0.0054 (7) | 0.0004 (7) |
C3 | 0.0333 (9) | 0.0274 (8) | 0.0293 (9) | 0.0050 (7) | 0.0086 (7) | 0.0024 (7) |
C4 | 0.0329 (9) | 0.0289 (9) | 0.0287 (9) | 0.0038 (6) | 0.0014 (7) | 0.0007 (7) |
C5 | 0.0322 (9) | 0.0284 (8) | 0.0306 (9) | 0.0002 (6) | 0.0047 (7) | −0.0014 (7) |
C6 | 0.0889 (19) | 0.0920 (19) | 0.0465 (14) | 0.0128 (14) | 0.0310 (13) | 0.0068 (12) |
C31 | 0.0336 (9) | 0.0323 (9) | 0.0273 (9) | 0.0033 (7) | 0.0093 (7) | 0.0010 (7) |
C32 | 0.0326 (9) | 0.0384 (9) | 0.0272 (9) | 0.0009 (7) | 0.0099 (7) | 0.0021 (7) |
C33 | 0.0412 (10) | 0.0380 (10) | 0.0403 (11) | −0.0008 (8) | 0.0091 (8) | 0.0031 (8) |
C34 | 0.0522 (13) | 0.0450 (12) | 0.0566 (13) | −0.0126 (9) | 0.0057 (10) | −0.0017 (10) |
C35 | 0.0471 (13) | 0.0626 (15) | 0.0604 (15) | −0.0160 (10) | −0.0061 (11) | 0.0037 (11) |
C36 | 0.0389 (11) | 0.0599 (13) | 0.0495 (12) | −0.0012 (9) | −0.0021 (9) | 0.0106 (10) |
C37 | 0.0345 (10) | 0.0417 (10) | 0.0328 (9) | 0.0018 (7) | 0.0083 (8) | 0.0054 (7) |
C38 | 0.0385 (10) | 0.0363 (9) | 0.0306 (9) | 0.0027 (7) | 0.0075 (8) | 0.0002 (7) |
C41 | 0.0402 (10) | 0.0257 (8) | 0.0306 (9) | 0.0035 (7) | 0.0031 (7) | −0.0009 (7) |
C42 | 0.0365 (10) | 0.0361 (9) | 0.0343 (10) | 0.0075 (7) | 0.0030 (8) | −0.0048 (7) |
C43 | 0.0479 (11) | 0.0472 (11) | 0.0369 (11) | 0.0155 (9) | 0.0020 (9) | −0.0002 (8) |
C44 | 0.0636 (15) | 0.0593 (14) | 0.0459 (13) | 0.0249 (11) | −0.0098 (11) | −0.0050 (10) |
C45 | 0.0428 (13) | 0.0837 (18) | 0.081 (2) | 0.0188 (12) | −0.0127 (13) | −0.0223 (15) |
C46 | 0.0410 (13) | 0.105 (2) | 0.085 (2) | 0.0046 (13) | 0.0114 (13) | −0.0088 (16) |
C47 | 0.0429 (12) | 0.0740 (15) | 0.0535 (13) | 0.0057 (10) | 0.0115 (10) | 0.0012 (11) |
C51 | 0.0358 (9) | 0.0263 (8) | 0.0310 (9) | 0.0028 (7) | 0.0052 (7) | −0.0013 (7) |
C52 | 0.0342 (10) | 0.0407 (10) | 0.0360 (10) | −0.0023 (7) | 0.0054 (8) | −0.0015 (8) |
C53 | 0.0501 (12) | 0.0482 (11) | 0.0300 (10) | −0.0001 (9) | 0.0029 (9) | 0.0024 (8) |
C54 | 0.0597 (13) | 0.0430 (11) | 0.0390 (11) | 0.0073 (9) | 0.0180 (10) | 0.0016 (8) |
C55 | 0.0473 (12) | 0.0582 (13) | 0.0499 (12) | 0.0167 (9) | 0.0210 (10) | 0.0063 (10) |
C56 | 0.0373 (10) | 0.0482 (11) | 0.0391 (11) | 0.0107 (8) | 0.0062 (8) | 0.0030 (8) |
N1 | 0.0830 (14) | 0.0337 (10) | 0.0688 (13) | 0.0048 (9) | −0.0014 (11) | −0.0071 (8) |
N2 | 0.0395 (8) | 0.0369 (8) | 0.0357 (8) | 0.0085 (7) | 0.0051 (7) | 0.0084 (7) |
O1 | 0.0331 (6) | 0.0279 (6) | 0.0415 (7) | 0.0036 (5) | −0.0016 (5) | −0.0029 (5) |
O2 | 0.0515 (8) | 0.0508 (8) | 0.0290 (7) | 0.0095 (6) | 0.0051 (6) | 0.0042 (6) |
C1—N1 | 1.142 (2) | C37—N2 | 1.370 (2) |
C1—C2 | 1.411 (2) | C38—N2 | 1.348 (2) |
C2—C3 | 1.343 (2) | C38—H38 | 0.9300 |
C2—C5 | 1.511 (2) | C41—O2 | 1.208 (2) |
C3—O1 | 1.3670 (18) | C41—C42 | 1.484 (2) |
C3—C31 | 1.436 (2) | C42—C43 | 1.379 (3) |
C4—O1 | 1.4397 (19) | C42—C47 | 1.386 (3) |
C4—C41 | 1.521 (2) | C43—C44 | 1.385 (3) |
C4—C5 | 1.557 (2) | C43—H43 | 0.9300 |
C4—H4 | 0.9800 | C44—C45 | 1.374 (3) |
C5—C51 | 1.515 (2) | C44—H44 | 0.9300 |
C5—H5 | 0.9800 | C45—C46 | 1.366 (4) |
C6—C54 | 1.501 (3) | C45—H45 | 0.9300 |
C6—H6A | 0.9600 | C46—C47 | 1.376 (3) |
C6—H6B | 0.9600 | C46—H46 | 0.9300 |
C6—H6C | 0.9600 | C47—H47 | 0.9300 |
C31—C38 | 1.370 (2) | C51—C56 | 1.380 (2) |
C31—C32 | 1.441 (2) | C51—C52 | 1.385 (2) |
C32—C33 | 1.393 (2) | C52—C53 | 1.381 (3) |
C32—C37 | 1.405 (2) | C52—H52 | 0.9300 |
C33—C34 | 1.372 (3) | C53—C54 | 1.377 (3) |
C33—H33 | 0.9300 | C53—H53 | 0.9300 |
C34—C35 | 1.391 (3) | C54—C55 | 1.381 (3) |
C34—H34 | 0.9300 | C55—C56 | 1.381 (3) |
C35—C36 | 1.374 (3) | C55—H55 | 0.9300 |
C35—H35 | 0.9300 | C56—H56 | 0.9300 |
C36—C37 | 1.383 (3) | N2—H2 | 0.91 (2) |
C36—H36 | 0.9300 | ||
N1—C1—C2 | 179.0 (2) | N2—C38—C31 | 109.98 (15) |
C3—C2—C1 | 125.41 (15) | N2—C38—H38 | 125.0 |
C3—C2—C5 | 110.74 (14) | C31—C38—H38 | 125.0 |
C1—C2—C5 | 123.49 (15) | O2—C41—C42 | 121.82 (17) |
C2—C3—O1 | 112.21 (14) | O2—C41—C4 | 121.48 (15) |
C2—C3—C31 | 132.51 (15) | C42—C41—C4 | 116.40 (14) |
O1—C3—C31 | 115.18 (14) | C43—C42—C47 | 119.15 (18) |
O1—C4—C41 | 110.25 (13) | C43—C42—C41 | 122.17 (17) |
O1—C4—C5 | 106.50 (12) | C47—C42—C41 | 118.55 (17) |
C41—C4—C5 | 109.70 (13) | C42—C43—C44 | 120.4 (2) |
O1—C4—H4 | 110.1 | C42—C43—H43 | 119.8 |
C41—C4—H4 | 110.1 | C44—C43—H43 | 119.8 |
C5—C4—H4 | 110.1 | C45—C44—C43 | 119.5 (2) |
C2—C5—C51 | 113.80 (13) | C45—C44—H44 | 120.2 |
C2—C5—C4 | 98.75 (12) | C43—C44—H44 | 120.2 |
C51—C5—C4 | 113.99 (13) | C46—C45—C44 | 120.5 (2) |
C2—C5—H5 | 109.9 | C46—C45—H45 | 119.7 |
C51—C5—H5 | 109.9 | C44—C45—H45 | 119.7 |
C4—C5—H5 | 109.9 | C45—C46—C47 | 120.2 (2) |
C54—C6—H6A | 109.5 | C45—C46—H46 | 119.9 |
C54—C6—H6B | 109.5 | C47—C46—H46 | 119.9 |
H6A—C6—H6B | 109.5 | C46—C47—C42 | 120.2 (2) |
C54—C6—H6C | 109.5 | C46—C47—H47 | 119.9 |
H6A—C6—H6C | 109.5 | C42—C47—H47 | 119.9 |
H6B—C6—H6C | 109.5 | C56—C51—C52 | 117.94 (16) |
C38—C31—C3 | 125.75 (15) | C56—C51—C5 | 121.36 (15) |
C38—C31—C32 | 106.58 (15) | C52—C51—C5 | 120.67 (15) |
C3—C31—C32 | 127.64 (15) | C53—C52—C51 | 120.77 (17) |
C33—C32—C37 | 118.61 (16) | C53—C52—H52 | 119.6 |
C33—C32—C31 | 135.37 (16) | C51—C52—H52 | 119.6 |
C37—C32—C31 | 106.01 (15) | C54—C53—C52 | 121.43 (18) |
C34—C33—C32 | 118.84 (17) | C54—C53—H53 | 119.3 |
C34—C33—H33 | 120.6 | C52—C53—H53 | 119.3 |
C32—C33—H33 | 120.6 | C53—C54—C55 | 117.63 (18) |
C33—C34—C35 | 121.53 (19) | C53—C54—C6 | 121.72 (19) |
C33—C34—H34 | 119.2 | C55—C54—C6 | 120.64 (19) |
C35—C34—H34 | 119.2 | C54—C55—C56 | 121.37 (19) |
C36—C35—C34 | 121.10 (19) | C54—C55—H55 | 119.3 |
C36—C35—H35 | 119.4 | C56—C55—H55 | 119.3 |
C34—C35—H35 | 119.4 | C51—C56—C55 | 120.85 (17) |
C35—C36—C37 | 117.31 (18) | C51—C56—H56 | 119.6 |
C35—C36—H36 | 121.3 | C55—C56—H56 | 119.6 |
C37—C36—H36 | 121.3 | C38—N2—C37 | 109.46 (14) |
N2—C37—C36 | 129.44 (17) | C38—N2—H2 | 125.2 (12) |
N2—C37—C32 | 107.95 (15) | C37—N2—H2 | 124.4 (12) |
C36—C37—C32 | 122.60 (17) | C3—O1—C4 | 107.96 (12) |
N1—C1—C2—C3 | 106 (14) | C5—C4—C41—O2 | 105.78 (18) |
N1—C1—C2—C5 | −82 (14) | O1—C4—C41—C42 | 175.00 (13) |
C1—C2—C3—O1 | 178.88 (16) | C5—C4—C41—C42 | −68.02 (17) |
C5—C2—C3—O1 | 5.6 (2) | O2—C41—C42—C43 | 166.10 (17) |
C1—C2—C3—C31 | 2.8 (3) | C4—C41—C42—C43 | −20.1 (2) |
C5—C2—C3—C31 | −170.48 (17) | O2—C41—C42—C47 | −18.1 (3) |
C3—C2—C5—C51 | 106.09 (16) | C4—C41—C42—C47 | 155.73 (17) |
C1—C2—C5—C51 | −67.3 (2) | C47—C42—C43—C44 | −1.5 (3) |
C3—C2—C5—C4 | −15.07 (18) | C41—C42—C43—C44 | 174.33 (17) |
C1—C2—C5—C4 | 171.50 (16) | C42—C43—C44—C45 | 0.4 (3) |
O1—C4—C5—C2 | 18.97 (16) | C43—C44—C45—C46 | 0.9 (4) |
C41—C4—C5—C2 | −100.33 (14) | C44—C45—C46—C47 | −1.1 (4) |
O1—C4—C5—C51 | −102.04 (15) | C45—C46—C47—C42 | 0.0 (4) |
C41—C4—C5—C51 | 138.65 (14) | C43—C42—C47—C46 | 1.3 (3) |
C2—C3—C31—C38 | −12.6 (3) | C41—C42—C47—C46 | −174.7 (2) |
O1—C3—C31—C38 | 171.41 (15) | C2—C5—C51—C56 | −32.8 (2) |
C2—C3—C31—C32 | 165.29 (18) | C4—C5—C51—C56 | 79.46 (19) |
O1—C3—C31—C32 | −10.7 (2) | C2—C5—C51—C52 | 149.49 (15) |
C38—C31—C32—C33 | −179.13 (19) | C4—C5—C51—C52 | −98.29 (18) |
C3—C31—C32—C33 | 2.7 (3) | C56—C51—C52—C53 | 0.6 (3) |
C38—C31—C32—C37 | 0.53 (18) | C5—C51—C52—C53 | 178.47 (16) |
C3—C31—C32—C37 | −177.68 (16) | C51—C52—C53—C54 | 0.0 (3) |
C37—C32—C33—C34 | −0.3 (3) | C52—C53—C54—C55 | −0.7 (3) |
C31—C32—C33—C34 | 179.29 (19) | C52—C53—C54—C6 | 178.30 (19) |
C32—C33—C34—C35 | 0.3 (3) | C53—C54—C55—C56 | 0.8 (3) |
C33—C34—C35—C36 | 0.2 (4) | C6—C54—C55—C56 | −178.2 (2) |
C34—C35—C36—C37 | −0.7 (3) | C52—C51—C56—C55 | −0.5 (3) |
C35—C36—C37—N2 | −179.33 (19) | C5—C51—C56—C55 | −178.35 (16) |
C35—C36—C37—C32 | 0.6 (3) | C54—C55—C56—C51 | −0.2 (3) |
C33—C32—C37—N2 | 179.83 (15) | C31—C38—N2—C37 | 1.1 (2) |
C31—C32—C37—N2 | 0.10 (19) | C36—C37—N2—C38 | 179.26 (19) |
C33—C32—C37—C36 | −0.1 (3) | C32—C37—N2—C38 | −0.7 (2) |
C31—C32—C37—C36 | −179.88 (17) | C2—C3—O1—C4 | 7.86 (18) |
C3—C31—C38—N2 | 177.26 (15) | C31—C3—O1—C4 | −175.33 (14) |
C32—C31—C38—N2 | −0.99 (19) | C41—C4—O1—C3 | 101.52 (14) |
O1—C4—C41—O2 | −11.2 (2) | C5—C4—O1—C3 | −17.43 (17) |
Cg1 is the centroid of the C51–C56 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C33—H33···O1 | 0.93 | 2.52 | 3.032 (2) | 115 |
N2—H2···O2i | 0.91 (2) | 2.04 (2) | 2.880 (2) | 154 |
C44—H44···O2ii | 0.93 | 2.55 | 3.329 (3) | 142 |
C34—H34···Cg1iii | 0.93 | 2.69 | 3.556 (3) | 156 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) x−1/2, −y+1/2, z−1/2; (iii) x−1/2, −y−1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C27H20N2O2 |
Mr | 404.45 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 9.8084 (4), 15.9553 (7), 13.8782 (7) |
β (°) | 107.185 (2) |
V (Å3) | 2074.92 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.19 × 0.15 × 0.12 |
Data collection | |
Diffractometer | Bruker Kappa APEXII |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.967, 0.974 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21144, 4647, 3017 |
Rint | 0.038 |
(sin θ/λ)max (Å−1) | 0.646 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.133, 1.02 |
No. of reflections | 4647 |
No. of parameters | 284 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.25, −0.22 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
Cg1 is the centroid of the C51–C56 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C33—H33···O1 | 0.93 | 2.52 | 3.032 (2) | 115 |
N2—H2···O2i | 0.91 (2) | 2.04 (2) | 2.880 (2) | 154 |
C44—H44···O2ii | 0.93 | 2.55 | 3.329 (3) | 142 |
C34—H34···Cg1iii | 0.93 | 2.69 | 3.556 (3) | 156 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) x−1/2, −y+1/2, z−1/2; (iii) x−1/2, −y−1/2, z−1/2. |
Acknowledgements
JS thanks the UGC for the FIST support. JS and RV thank the management of Madura College for their encouragement and support. PG thanks the CSIR for a Junior and Senior Research Fellowship. SP thanks the Department of Science and Technology, New Delhi, for funding the Indo-Spanish collaborative major research project (grant No. DST/INT/SPAIN/09).
References
Auvin, S. & Chabrier De Lassauniere, P. (2005). US Patent No. 222045. Google Scholar
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573. CrossRef CAS Web of Science Google Scholar
Bruker (2004). APEX2 and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Cremer, D. & Pople, J. A. (1975). J. Am. Chem. Soc. 97, 1354–1358. CrossRef CAS Web of Science Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals 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.
Furanyl derivatives have calplain-inhibiting activity and are used in the preparation of medicaments for the treatment of inflammatory and immunological diseases, cardiovascular and cerebro-vascular diseases, disorders of the central or peripheral nervous system, cachexia, osteoporosis, muscular dystrophy, proliferative diseases, cataracts, rejection reactions following organ transplants and auto-immune and viral diseases (Auvin et al., 2005). The high medicinal value of these compounds in conjunction with our research interests prompted us to synthesize and report the X-ray structure of the title compound.
In the title compound (Fig 1), the five-membered furanyl ring adopts a twisted conformation as evident from the puckering parameters (Cremer & Pople, 1975) Q = 0.192 (2) Å and φ = 129.0 (6)°. The five-(N2/C38/C31/C32/C37) and six-membered (C32—C37) rings in the indole group are planar, with a dihedral angle of 0.74 (1)° between them. The dihedral angle between the phenyl rings (C42—C47 and C51—C56) is 15.24 (1)°.
Fig. 2 shows the partial packing of molecules in the crystal structure. The C—H···O and N—H···O intermolecular interactions generate C11(6) chain and centrosymmetric R22(18) motifs, respectively (Bernstein et al., 1995). In addition, there is a weak C—H···π interaction, viz, C34—H34···Cg1ii, Table 1.