organic compounds
5-Methoxy-3-[(5-methoxy-1H-indol-3-yl)(phenyl)methyl]-1H-indole
aDepartment of Physics, RKM Vivekananda College (Autonomous), Chennai 600 004, India, and bOrganic Chemistry Division, Central Leather Research Institute, Adyar, Chennai 600 020, India
*Correspondence e-mail: ksethusankar@yahoo.co.in
In the title compound, C25H22N2O2, the indole rings are individually almost planar [with maximum deviations of 0.0116 (19) and 0.0113 (18) Å] and are almost orthogonal to each other, making a dihedral angle of 84.49 (6)°. The benzene ring is inclined at 72.83 (9) and 80.85 (9)° with respect to the indole rings. In the crystal, molecules are linked by N—H⋯O interactions into chains running parallel to the c axis. The is further stabilized by C—H⋯π interactions.
Related literature
For the biological activity and uses of indole derivatives, see: Bell et al. (1994); Ge et al. (1996). For related structures, see: Zhang et al. (2006, 2007).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2008); cell SAINT (Bruker, 2008); 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 and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536811045491/pv2461sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536811045491/pv2461Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S1600536811045491/pv2461Isup3.cml
To benzaldehyde (1 mmol) in CH2Cl2 (10 ml) was added KHSO4 (30 mol%) and the mixture was stirred for 5 min. Methoxyindole (2 mmol) was added to the mixture and the stirring was continued following the progress of the reaction by TLC. After completion of the reaction, the reaction mixture was extracted with ethyl acetate (3 x 10 ml), dried over anhydrous sodium sulfate, filtered, concentrated under reduced pressure and the residue was column chromatographed over silica gel using EtOAc/Petroleum ether (1:19) as
to get the pure product, the title compound, which was re-crystallized by slow evaporation of its solution in ethyl acetate, resulting in single crystals, suitable for XRD studies.The hydrogen atoms were placed in calculated positions with C–H = 0.93 to 0.98 and N–H = 0.86 Å and refined in the riding model with fixed isotropic displacement parameters: Uiso(H) = 1.5Ueq(C) for methyl groups and Uiso(H) = 1.2Ueq(C,N) for others. The crystal did not diffract beyond θ =23.7 ° as its mosaicity was quite high and a low temperature facility was not used for intensity data collection.
The synthesis of bis-indolylalkanes (BIAs) has been of considerable interest because of their occurance in various natural products posessing biological activities and usefulness in drug design (Bell, et al. 1994). These compounds also inhibit the proliferation of both estrogen dependent and independent cultured breast tumor cells (Ge, et al. 1996). In this paper, we present the synthesis and
of the title bis-indolylalkane derivative.The title compound (Fig. 1) comprises a benzene ring and two methoxy indole rings connected through a carbon atom C7. The bicyclic indole rings, are individually planar with maximum deviations of 0.0116 (19)Å for C10 atom, in ring A (N1/C8–C15) and -0.0113 (18)Å for N2 atom, in ring B (N2/C17–C24). The indole rings are almost orthogonal to each other, with a dihedral angle of 84.49 (6)°. The deviations of methoxy group carbon atoms C16 and C25 from the rings A & B, are -0.118 (3)Å and -0.100 (3) Å, respectively.
The benzene ring (C1–C6) is inclined at 72.83 (9)° and 80.85 (9)°, with the indole rings A & B, respectively. The angles around atom C7 [C8–C7–C17 = 113.07 (14)°, C8–C7–C6 = 112.52 (14)° and C17–C7–C6 = 111.53 (15)°] deviate significantly from the ideal tetrahedral values which may be a result of steric interactions between benzene ring and the indole rings.
In the crystal packing, the molecules are linked by N—H···O intermolecular interactions into infinite chains running parallel to the c axis (Fig. 2). The
is further stabilized by C—H···Cg interactions where Cg2, Cg3, Cg4 and Cg5 are the centers of gravity of rings (N2/C17–C20), (C1–C6), (C10–C15) and (C19–C24), respectively (Table 1).For the biological activity and uses of indole derivatives, see: Bell et al. (1994); Ge et al. (1996). For related structures, see: Zhang et al. (2006, 2007).
Data collection: APEX2 (Bruker, 2008); cell
SAINT (Bruker, 2008); data reduction: SAINT (Bruker, 2008); 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) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound with the atom numbering scheme; displacement ellipsoids are drawn at 30% probability level. | |
Fig. 2. The packing arrangement of the title compound viewed down the a axis. The dashed lines indicate N—H···O intermolecular interactions resulting in chaims of molecules running parallel to the c axis. |
C25H22N2O2 | F(000) = 808 |
Mr = 382.45 | Dx = 1.240 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 3087 reflections |
a = 9.1545 (4) Å | θ = 2.2–23.7° |
b = 10.5954 (6) Å | µ = 0.08 mm−1 |
c = 21.1668 (13) Å | T = 293 K |
β = 93.679 (2)° | Block, brown |
V = 2048.86 (19) Å3 | 0.25 × 0.20 × 0.15 mm |
Z = 4 |
Bruker APEXII KappaCCD diffractometer | 3087 independent reflections |
Radiation source: fine-focus sealed tube | 2317 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.034 |
ω and φ scans | θmax = 23.7°, θmin = 2.2° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −7→10 |
Tmin = 0.981, Tmax = 0.988 | k = −11→11 |
16790 measured reflections | l = −22→23 |
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)] = 0.041 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0627P)2 + 0.4003P] where P = (Fo2 + 2Fc2)/3 |
3087 reflections | (Δ/σ)max < 0.001 |
264 parameters | Δρmax = 0.12 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
C25H22N2O2 | V = 2048.86 (19) Å3 |
Mr = 382.45 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 9.1545 (4) Å | µ = 0.08 mm−1 |
b = 10.5954 (6) Å | T = 293 K |
c = 21.1668 (13) Å | 0.25 × 0.20 × 0.15 mm |
β = 93.679 (2)° |
Bruker APEXII KappaCCD diffractometer | 3087 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 2317 reflections with I > 2σ(I) |
Tmin = 0.981, Tmax = 0.988 | Rint = 0.034 |
16790 measured reflections | θmax = 23.7° |
R[F2 > 2σ(F2)] = 0.041 | 0 restraints |
wR(F2) = 0.119 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.12 e Å−3 |
3087 reflections | Δρmin = −0.18 e Å−3 |
264 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 | ||
C1 | 0.4797 (2) | 0.37371 (19) | 0.41816 (10) | 0.0532 (5) | |
H1 | 0.5236 | 0.4447 | 0.4370 | 0.064* | |
C2 | 0.3360 (2) | 0.3804 (2) | 0.39415 (11) | 0.0661 (6) | |
H2 | 0.2837 | 0.4552 | 0.3973 | 0.079* | |
C3 | 0.2704 (2) | 0.2767 (3) | 0.36573 (12) | 0.0748 (7) | |
H3 | 0.1739 | 0.2812 | 0.3493 | 0.090* | |
C4 | 0.3477 (2) | 0.1667 (3) | 0.36166 (12) | 0.0776 (8) | |
H4 | 0.3033 | 0.0962 | 0.3426 | 0.093* | |
C5 | 0.4916 (2) | 0.1600 (2) | 0.38590 (10) | 0.0580 (6) | |
H5 | 0.5433 | 0.0850 | 0.3827 | 0.070* | |
C6 | 0.55940 (18) | 0.26319 (17) | 0.41470 (8) | 0.0405 (5) | |
C7 | 0.71658 (18) | 0.25468 (16) | 0.44225 (8) | 0.0374 (4) | |
H7 | 0.7559 | 0.1752 | 0.4268 | 0.045* | |
C8 | 0.72666 (19) | 0.24617 (17) | 0.51335 (8) | 0.0394 (4) | |
C9 | 0.6212 (2) | 0.26862 (18) | 0.55446 (9) | 0.0493 (5) | |
H9 | 0.5270 | 0.2967 | 0.5429 | 0.059* | |
C10 | 0.85246 (19) | 0.20426 (17) | 0.55141 (8) | 0.0402 (4) | |
C11 | 0.8153 (2) | 0.20311 (18) | 0.61463 (9) | 0.0489 (5) | |
C12 | 0.9142 (3) | 0.1637 (2) | 0.66314 (10) | 0.0639 (6) | |
H12 | 0.8885 | 0.1626 | 0.7049 | 0.077* | |
C13 | 1.0503 (3) | 0.1267 (2) | 0.64757 (11) | 0.0681 (6) | |
H13 | 1.1183 | 0.1007 | 0.6795 | 0.082* | |
C14 | 1.0901 (2) | 0.1267 (2) | 0.58488 (11) | 0.0566 (6) | |
C15 | 0.9929 (2) | 0.16574 (17) | 0.53660 (9) | 0.0460 (5) | |
H15 | 1.0197 | 0.1666 | 0.4950 | 0.055* | |
C16 | 1.2814 (2) | 0.0968 (2) | 0.51545 (13) | 0.0767 (7) | |
H16A | 1.2214 | 0.0460 | 0.4866 | 0.115* | |
H16B | 1.3809 | 0.0682 | 0.5160 | 0.115* | |
H16C | 1.2763 | 0.1834 | 0.5020 | 0.115* | |
C17 | 0.80985 (17) | 0.35843 (17) | 0.41750 (8) | 0.0378 (4) | |
C18 | 0.8511 (2) | 0.46889 (19) | 0.44561 (9) | 0.0502 (5) | |
H18 | 0.8282 | 0.4933 | 0.4860 | 0.060* | |
C19 | 0.94249 (19) | 0.47413 (18) | 0.35062 (9) | 0.0445 (5) | |
C20 | 0.86769 (17) | 0.35972 (16) | 0.35638 (8) | 0.0365 (4) | |
C21 | 0.86324 (18) | 0.27284 (18) | 0.30657 (8) | 0.0422 (5) | |
H21 | 0.8142 | 0.1964 | 0.3095 | 0.051* | |
C22 | 0.9332 (2) | 0.30362 (19) | 0.25334 (9) | 0.0468 (5) | |
C23 | 1.0038 (2) | 0.4195 (2) | 0.24795 (10) | 0.0566 (6) | |
H23 | 1.0473 | 0.4387 | 0.2106 | 0.068* | |
C24 | 1.0106 (2) | 0.5050 (2) | 0.29604 (10) | 0.0571 (6) | |
H24 | 1.0592 | 0.5815 | 0.2924 | 0.069* | |
C25 | 0.8751 (4) | 0.1091 (3) | 0.20263 (14) | 0.1214 (14) | |
H25A | 0.9235 | 0.0574 | 0.2348 | 0.182* | |
H25B | 0.8804 | 0.0692 | 0.1621 | 0.182* | |
H25C | 0.7744 | 0.1199 | 0.2116 | 0.182* | |
N1 | 0.6733 (2) | 0.24406 (16) | 0.61507 (8) | 0.0585 (5) | |
H1A | 0.6248 | 0.2529 | 0.6483 | 0.070* | |
N2 | 0.93115 (18) | 0.53917 (16) | 0.40619 (8) | 0.0568 (5) | |
H2A | 0.9683 | 0.6122 | 0.4148 | 0.068* | |
O1 | 1.23040 (17) | 0.08657 (16) | 0.57707 (8) | 0.0778 (5) | |
O2 | 0.94253 (17) | 0.22539 (15) | 0.20173 (7) | 0.0693 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0506 (12) | 0.0478 (13) | 0.0616 (14) | 0.0015 (10) | 0.0059 (10) | −0.0035 (10) |
C2 | 0.0535 (13) | 0.0641 (16) | 0.0804 (17) | 0.0134 (11) | 0.0026 (11) | −0.0016 (13) |
C3 | 0.0444 (12) | 0.092 (2) | 0.0867 (18) | 0.0084 (13) | −0.0066 (11) | −0.0137 (15) |
C4 | 0.0510 (13) | 0.0825 (19) | 0.097 (2) | −0.0035 (13) | −0.0095 (12) | −0.0342 (15) |
C5 | 0.0470 (11) | 0.0568 (14) | 0.0701 (15) | 0.0024 (10) | 0.0022 (10) | −0.0191 (11) |
C6 | 0.0387 (10) | 0.0447 (12) | 0.0390 (11) | −0.0023 (8) | 0.0090 (8) | −0.0032 (8) |
C7 | 0.0385 (9) | 0.0368 (10) | 0.0376 (11) | −0.0013 (8) | 0.0088 (8) | −0.0050 (8) |
C8 | 0.0442 (10) | 0.0363 (11) | 0.0390 (11) | −0.0053 (8) | 0.0115 (8) | −0.0025 (8) |
C9 | 0.0522 (11) | 0.0499 (12) | 0.0472 (13) | −0.0019 (9) | 0.0134 (10) | −0.0004 (9) |
C10 | 0.0504 (11) | 0.0320 (10) | 0.0387 (11) | −0.0068 (8) | 0.0072 (8) | −0.0012 (8) |
C11 | 0.0643 (13) | 0.0415 (12) | 0.0419 (12) | −0.0069 (10) | 0.0118 (10) | 0.0000 (9) |
C12 | 0.0972 (18) | 0.0559 (14) | 0.0384 (12) | −0.0070 (13) | 0.0021 (12) | 0.0074 (10) |
C13 | 0.0833 (17) | 0.0560 (15) | 0.0626 (16) | 0.0029 (12) | −0.0130 (13) | 0.0122 (12) |
C14 | 0.0611 (13) | 0.0438 (13) | 0.0641 (15) | −0.0001 (10) | −0.0033 (11) | 0.0032 (10) |
C15 | 0.0514 (11) | 0.0403 (11) | 0.0464 (12) | −0.0042 (9) | 0.0046 (9) | −0.0017 (9) |
C16 | 0.0547 (13) | 0.0661 (17) | 0.111 (2) | 0.0008 (11) | 0.0160 (14) | 0.0084 (15) |
C17 | 0.0364 (9) | 0.0403 (11) | 0.0372 (11) | −0.0024 (8) | 0.0056 (8) | −0.0028 (8) |
C18 | 0.0574 (12) | 0.0516 (13) | 0.0427 (11) | −0.0084 (10) | 0.0122 (9) | −0.0075 (10) |
C19 | 0.0474 (10) | 0.0405 (11) | 0.0463 (12) | −0.0032 (9) | 0.0079 (9) | 0.0011 (9) |
C20 | 0.0341 (9) | 0.0378 (11) | 0.0379 (11) | −0.0009 (8) | 0.0047 (7) | 0.0008 (8) |
C21 | 0.0402 (10) | 0.0454 (12) | 0.0418 (11) | −0.0063 (8) | 0.0089 (8) | −0.0014 (9) |
C22 | 0.0490 (11) | 0.0546 (13) | 0.0379 (11) | −0.0024 (9) | 0.0112 (9) | −0.0024 (10) |
C23 | 0.0662 (13) | 0.0579 (14) | 0.0483 (13) | −0.0051 (11) | 0.0236 (10) | 0.0102 (11) |
C24 | 0.0662 (13) | 0.0416 (13) | 0.0659 (15) | −0.0092 (10) | 0.0223 (11) | 0.0068 (11) |
C25 | 0.167 (3) | 0.118 (3) | 0.086 (2) | −0.081 (2) | 0.067 (2) | −0.0612 (19) |
N1 | 0.0740 (12) | 0.0639 (12) | 0.0403 (11) | −0.0035 (9) | 0.0243 (9) | −0.0015 (8) |
N2 | 0.0704 (11) | 0.0422 (10) | 0.0591 (11) | −0.0166 (8) | 0.0140 (9) | −0.0078 (9) |
O1 | 0.0604 (10) | 0.0750 (12) | 0.0961 (14) | 0.0174 (8) | −0.0089 (9) | 0.0057 (9) |
O2 | 0.0840 (11) | 0.0779 (11) | 0.0491 (9) | −0.0194 (9) | 0.0296 (8) | −0.0157 (8) |
C1—C2 | 1.382 (3) | C14—C15 | 1.374 (3) |
C1—C6 | 1.384 (3) | C15—H15 | 0.9300 |
C1—H1 | 0.9300 | C16—O1 | 1.417 (3) |
C2—C3 | 1.372 (3) | C16—H16A | 0.9600 |
C2—H2 | 0.9300 | C16—H16B | 0.9600 |
C3—C4 | 1.369 (3) | C16—H16C | 0.9600 |
C3—H3 | 0.9300 | C17—C18 | 1.356 (3) |
C4—C5 | 1.385 (3) | C17—C20 | 1.429 (2) |
C4—H4 | 0.9300 | C18—N2 | 1.366 (2) |
C5—C6 | 1.379 (3) | C18—H18 | 0.9300 |
C5—H5 | 0.9300 | C19—N2 | 1.373 (2) |
C6—C7 | 1.520 (2) | C19—C24 | 1.386 (3) |
C7—C8 | 1.505 (2) | C19—C20 | 1.401 (2) |
C7—C17 | 1.506 (2) | C20—C21 | 1.398 (2) |
C7—H7 | 0.9800 | C21—C22 | 1.371 (3) |
C8—C9 | 1.362 (3) | C21—H21 | 0.9300 |
C8—C10 | 1.433 (3) | C22—O2 | 1.378 (2) |
C9—N1 | 1.365 (3) | C22—C23 | 1.395 (3) |
C9—H9 | 0.9300 | C23—C24 | 1.361 (3) |
C10—C11 | 1.402 (3) | C23—H23 | 0.9300 |
C10—C15 | 1.404 (3) | C24—H24 | 0.9300 |
C11—N1 | 1.371 (3) | C25—O2 | 1.379 (3) |
C11—C12 | 1.389 (3) | C25—H25A | 0.9600 |
C12—C13 | 1.367 (3) | C25—H25B | 0.9600 |
C12—H12 | 0.9300 | C25—H25C | 0.9600 |
C13—C14 | 1.398 (3) | N1—H1A | 0.8600 |
C13—H13 | 0.9300 | N2—H2A | 0.8600 |
C14—O1 | 1.373 (2) | ||
C2—C1—C6 | 121.1 (2) | C14—C15—H15 | 120.7 |
C2—C1—H1 | 119.4 | C10—C15—H15 | 120.7 |
C6—C1—H1 | 119.4 | O1—C16—H16A | 109.5 |
C3—C2—C1 | 120.0 (2) | O1—C16—H16B | 109.5 |
C3—C2—H2 | 120.0 | H16A—C16—H16B | 109.5 |
C1—C2—H2 | 120.0 | O1—C16—H16C | 109.5 |
C4—C3—C2 | 119.8 (2) | H16A—C16—H16C | 109.5 |
C4—C3—H3 | 120.1 | H16B—C16—H16C | 109.5 |
C2—C3—H3 | 120.1 | C18—C17—C20 | 106.26 (15) |
C3—C4—C5 | 120.2 (2) | C18—C17—C7 | 128.73 (16) |
C3—C4—H4 | 119.9 | C20—C17—C7 | 124.96 (15) |
C5—C4—H4 | 119.9 | C17—C18—N2 | 110.36 (17) |
C6—C5—C4 | 120.9 (2) | C17—C18—H18 | 124.8 |
C6—C5—H5 | 119.5 | N2—C18—H18 | 124.8 |
C4—C5—H5 | 119.5 | N2—C19—C24 | 131.17 (18) |
C5—C6—C1 | 118.03 (17) | N2—C19—C20 | 107.18 (15) |
C5—C6—C7 | 120.69 (17) | C24—C19—C20 | 121.65 (18) |
C1—C6—C7 | 121.27 (17) | C21—C20—C19 | 119.64 (16) |
C8—C7—C17 | 113.07 (14) | C21—C20—C17 | 132.98 (16) |
C8—C7—C6 | 112.52 (14) | C19—C20—C17 | 107.37 (15) |
C17—C7—C6 | 111.53 (15) | C22—C21—C20 | 118.07 (17) |
C8—C7—H7 | 106.4 | C22—C21—H21 | 121.0 |
C17—C7—H7 | 106.4 | C20—C21—H21 | 121.0 |
C6—C7—H7 | 106.4 | C21—C22—O2 | 124.35 (18) |
C9—C8—C10 | 105.80 (17) | C21—C22—C23 | 121.32 (18) |
C9—C8—C7 | 128.92 (17) | O2—C22—C23 | 114.32 (17) |
C10—C8—C7 | 125.19 (15) | C24—C23—C22 | 121.57 (18) |
C8—C9—N1 | 110.34 (18) | C24—C23—H23 | 119.2 |
C8—C9—H9 | 124.8 | C22—C23—H23 | 119.2 |
N1—C9—H9 | 124.8 | C23—C24—C19 | 117.70 (19) |
C11—C10—C15 | 119.51 (18) | C23—C24—H24 | 121.2 |
C11—C10—C8 | 107.68 (16) | C19—C24—H24 | 121.2 |
C15—C10—C8 | 132.80 (17) | O2—C25—H25A | 109.5 |
N1—C11—C12 | 131.56 (19) | O2—C25—H25B | 109.5 |
N1—C11—C10 | 106.98 (17) | H25A—C25—H25B | 109.5 |
C12—C11—C10 | 121.46 (19) | O2—C25—H25C | 109.5 |
C13—C12—C11 | 118.0 (2) | H25A—C25—H25C | 109.5 |
C13—C12—H12 | 121.0 | H25B—C25—H25C | 109.5 |
C11—C12—H12 | 121.0 | C9—N1—C11 | 109.19 (16) |
C12—C13—C14 | 121.7 (2) | C9—N1—H1A | 125.4 |
C12—C13—H13 | 119.2 | C11—N1—H1A | 125.4 |
C14—C13—H13 | 119.2 | C18—N2—C19 | 108.83 (16) |
O1—C14—C15 | 124.7 (2) | C18—N2—H2A | 125.6 |
O1—C14—C13 | 114.60 (19) | C19—N2—H2A | 125.6 |
C15—C14—C13 | 120.7 (2) | C14—O1—C16 | 116.91 (17) |
C14—C15—C10 | 118.66 (19) | C22—O2—C25 | 118.42 (16) |
C6—C1—C2—C3 | −0.7 (3) | C8—C10—C15—C14 | −178.15 (19) |
C1—C2—C3—C4 | 0.4 (4) | C8—C7—C17—C18 | −28.6 (3) |
C2—C3—C4—C5 | −0.2 (4) | C6—C7—C17—C18 | 99.3 (2) |
C3—C4—C5—C6 | 0.3 (4) | C8—C7—C17—C20 | 154.25 (16) |
C4—C5—C6—C1 | −0.5 (3) | C6—C7—C17—C20 | −77.8 (2) |
C4—C5—C6—C7 | 178.92 (19) | C20—C17—C18—N2 | −0.1 (2) |
C2—C1—C6—C5 | 0.7 (3) | C7—C17—C18—N2 | −177.62 (17) |
C2—C1—C6—C7 | −178.74 (18) | N2—C19—C20—C21 | −179.02 (16) |
C5—C6—C7—C8 | −104.3 (2) | C24—C19—C20—C21 | 1.2 (3) |
C1—C6—C7—C8 | 75.1 (2) | N2—C19—C20—C17 | 0.3 (2) |
C5—C6—C7—C17 | 127.43 (19) | C24—C19—C20—C17 | −179.42 (17) |
C1—C6—C7—C17 | −53.1 (2) | C18—C17—C20—C21 | 179.09 (19) |
C17—C7—C8—C9 | 113.9 (2) | C7—C17—C20—C21 | −3.3 (3) |
C6—C7—C8—C9 | −13.6 (3) | C18—C17—C20—C19 | −0.2 (2) |
C17—C7—C8—C10 | −70.0 (2) | C7—C17—C20—C19 | 177.49 (16) |
C6—C7—C8—C10 | 162.53 (17) | C19—C20—C21—C22 | 0.0 (3) |
C10—C8—C9—N1 | 0.3 (2) | C17—C20—C21—C22 | −179.20 (18) |
C7—C8—C9—N1 | 176.99 (16) | C20—C21—C22—O2 | 177.46 (17) |
C9—C8—C10—C11 | 0.2 (2) | C20—C21—C22—C23 | −1.7 (3) |
C7—C8—C10—C11 | −176.63 (16) | C21—C22—C23—C24 | 2.3 (3) |
C9—C8—C10—C15 | 179.1 (2) | O2—C22—C23—C24 | −176.93 (19) |
C7—C8—C10—C15 | 2.2 (3) | C22—C23—C24—C19 | −1.1 (3) |
C15—C10—C11—N1 | −179.67 (17) | N2—C19—C24—C23 | 179.6 (2) |
C8—C10—C11—N1 | −0.7 (2) | C20—C19—C24—C23 | −0.7 (3) |
C15—C10—C11—C12 | −0.5 (3) | C8—C9—N1—C11 | −0.7 (2) |
C8—C10—C11—C12 | 178.51 (18) | C12—C11—N1—C9 | −178.2 (2) |
N1—C11—C12—C13 | 179.5 (2) | C10—C11—N1—C9 | 0.9 (2) |
C10—C11—C12—C13 | 0.5 (3) | C17—C18—N2—C19 | 0.3 (2) |
C11—C12—C13—C14 | −0.6 (3) | C24—C19—N2—C18 | 179.3 (2) |
C12—C13—C14—O1 | −179.8 (2) | C20—C19—N2—C18 | −0.4 (2) |
C12—C13—C14—C15 | 0.7 (3) | C15—C14—O1—C16 | 5.7 (3) |
O1—C14—C15—C10 | 179.89 (18) | C13—C14—O1—C16 | −173.79 (19) |
C13—C14—C15—C10 | −0.7 (3) | C21—C22—O2—C25 | 1.3 (3) |
C11—C10—C15—C14 | 0.6 (3) | C23—C22—O2—C25 | −179.6 (2) |
Cg2, Cg3, Cg4 and Cg5 are the centroids of the N2/C17–C20, C1–C6, C10–C15 and C19–C24 rings, respectively |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O2i | 0.86 | 2.09 | 2.904 (2) | 158 |
C25—H25B···Cg2ii | 0.96 | 2.95 | 3.515 (3) | 119 |
C16—H16C···Cg3iii | 0.96 | 2.90 | 3.508 (3) | 122 |
N2—H2A···Cg4iv | 0.86 | 2.49 | 3.3149 (19) | 160 |
C3—H3···Cg5v | 0.93 | 2.60 | 3.470 (2) | 157 |
Symmetry codes: (i) x−1/2, −y+1/2, z+1/2; (ii) −x+3/2, y−1/2, −z+1/2; (iii) x+1, y, z; (iv) −x+2, −y+1, −z+1; (v) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C25H22N2O2 |
Mr | 382.45 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 9.1545 (4), 10.5954 (6), 21.1668 (13) |
β (°) | 93.679 (2) |
V (Å3) | 2048.86 (19) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.25 × 0.20 × 0.15 |
Data collection | |
Diffractometer | Bruker APEXII KappaCCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.981, 0.988 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16790, 3087, 2317 |
Rint | 0.034 |
θmax (°) | 23.7 |
(sin θ/λ)max (Å−1) | 0.565 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.041, 0.119, 1.03 |
No. of reflections | 3087 |
No. of parameters | 264 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.12, −0.18 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg2, Cg3, Cg4 and Cg5 are the centroids of the N2/C17–C20, C1–C6, C10–C15 and C19–C24 rings, respectively |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1A···O2i | 0.86 | 2.09 | 2.904 (2) | 158 |
C25—H25B···Cg2ii | 0.96 | 2.95 | 3.515 (3) | 119 |
C16—H16C···Cg3iii | 0.96 | 2.90 | 3.508 (3) | 122 |
N2—H2A···Cg4iv | 0.86 | 2.49 | 3.3149 (19) | 160 |
C3—H3···Cg5v | 0.93 | 2.60 | 3.470 (2) | 157 |
Symmetry codes: (i) x−1/2, −y+1/2, z+1/2; (ii) −x+3/2, y−1/2, −z+1/2; (iii) x+1, y, z; (iv) −x+2, −y+1, −z+1; (v) x−1, y, z. |
Acknowledgements
PN and KS thank Dr Babu Varghese, Senior Scientific Officer, SAIF, IIT, Chennai, India, for the
data collection and Dr V. Murugan, Head of the Department of Physics, for providing facilities in the department to carry out this work.References
Bell, R., Carmeli, S. & Sar, N. (1994). J. Nat. Prod. 57, 1587–1590. CrossRef CAS PubMed Web of Science Google Scholar
Bruker (2008). APEX2, SAINT and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. CrossRef IUCr Journals Google Scholar
Ge, X., Yannai, S., Rennert, G., Gruener, N. & Fares, F. A. (1996). Biochem. Biophys. Res. Commun. 228, pp. 153–158. CrossRef CAS PubMed Web of Science 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
Zhang, D.-M., Tang, Q.-G., Ji, C.-X. & Guo, C. (2007). Acta Cryst. E63, o81–o82. Web of Science CSD CrossRef IUCr Journals Google Scholar
Zhang, D.-M., Tang, S.-G., Wu, W.-Y., Tang, Q.-G. & Guo, C. (2006). Acta Cryst. E62, o5467–o5468. Web of Science CSD CrossRef IUCr Journals Google Scholar
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The synthesis of bis-indolylalkanes (BIAs) has been of considerable interest because of their occurance in various natural products posessing biological activities and usefulness in drug design (Bell, et al. 1994). These compounds also inhibit the proliferation of both estrogen dependent and independent cultured breast tumor cells (Ge, et al. 1996). In this paper, we present the synthesis and crystal structure of the title bis-indolylalkane derivative.
The title compound (Fig. 1) comprises a benzene ring and two methoxy indole rings connected through a carbon atom C7. The bicyclic indole rings, are individually planar with maximum deviations of 0.0116 (19)Å for C10 atom, in ring A (N1/C8–C15) and -0.0113 (18)Å for N2 atom, in ring B (N2/C17–C24). The indole rings are almost orthogonal to each other, with a dihedral angle of 84.49 (6)°. The deviations of methoxy group carbon atoms C16 and C25 from the rings A & B, are -0.118 (3)Å and -0.100 (3) Å, respectively.
The benzene ring (C1–C6) is inclined at 72.83 (9)° and 80.85 (9)°, with the indole rings A & B, respectively. The angles around atom C7 [C8–C7–C17 = 113.07 (14)°, C8–C7–C6 = 112.52 (14)° and C17–C7–C6 = 111.53 (15)°] deviate significantly from the ideal tetrahedral values which may be a result of steric interactions between benzene ring and the indole rings.
In the crystal packing, the molecules are linked by N—H···O intermolecular interactions into infinite chains running parallel to the c axis (Fig. 2). The crystal structure is further stabilized by C—H···Cg interactions where Cg2, Cg3, Cg4 and Cg5 are the centers of gravity of rings (N2/C17–C20), (C1–C6), (C10–C15) and (C19–C24), respectively (Table 1).