organic compounds
4′-(4-Methoxyphenyl)-1,1′,1′′-trimethyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-pyrrolidine]-2,2′′,5′′-trione
aDepartment of Physics, Easwari Engineering College, Ramapuram, Chennai 600 089, India, bOrganic Chemistry Division, Central Leather Research Institute, Adyar, Chennai 600 020, India, and cDepartment of Physics, SRM University, Ramapuram Campus, Chennai 600 089, India
*Correspondence e-mail: sudharose18@gmail.com
In the title compound, C24H25N3O4, the pyrrolidine ring adopts an while the pyrrolidine-2′′,5′′-dione ring adopts a twist conformation. The indoline unit is planar [maximum deviation of −0.050 (9) Å] and forms a dihedral angle of 40.36 (4)° with the methoxyphenyl ring. Intramolecular C—H⋯O hydrogen bonds are observed. In the crystal, molecules are linked into a two-dimensional network parallel to the ab plane by intermolecular C—H⋯O hydrogen bonds and C—H⋯π interactions.
Related literature
For the biological activity of spiro-pyrrolidine-containing compounds, see: Araki et al. (2002); Gore et al. (1991); James et al. (1991); Kobayashi et al. (1991); Tietze et al. (1988). For the biological activity of indole derivatives, see: Harris & Uhle (1960); Ho et al. (1986); Stevenson et al. (2000). For a related structure, see: Govind et al. (2003). For ring-puckering parameters, 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: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009).
Supporting information
10.1107/S1600536809021114/ci2815sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809021114/ci2815Isup2.hkl
A mixture of sarcosine (1 mmol), 1-methylisatin (1 mmol) and 3-(4-methoxybenzylidine)-1-methyl-pyrrolidine-2,5-dione (1 mmol) was refluxed in methanol. Completion of the reaction was evidenced by TLC analysis. The solvent was then removed in vacuo and the crude product subjected to
(100–200 mesh) using petroleum ether–ethyl acetate as Single crystals were obtained by crystallization from petroleum ether and ethyl acetate mixture.H atoms were placed in idealized positions and allowed to ride on their parent atoms, with C—H = 0.93, 0.98, 0.97 and 0.96 Å for aromatic, methine, methylene and methyl H respectively, and Uiso(H) = 1.5Ueq(C) for methyl H and Uiso(H) = 1.2Ueq(C) for all other H atoms.
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: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound with 30% probability displacement ellipsoids. | |
Fig. 2. The packing of the molecules viewed down the a axis. Dashed lines indicate hydrogen bonds. H atoms not involed in hydrogen bonds have been omitted. |
C24H25N3O4 | F(000) = 1776 |
Mr = 419.47 | Dx = 1.316 Mg m−3 |
Orthorhombic, Pbca | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ac 2ab | Cell parameters from 5049 reflections |
a = 11.2074 (3) Å | θ = 2.4–25.7° |
b = 11.2406 (3) Å | µ = 0.09 mm−1 |
c = 33.6082 (9) Å | T = 293 K |
V = 4233.9 (2) Å3 | Prism, colourless |
Z = 8 | 0.25 × 0.17 × 0.15 mm |
Bruker Kappa APEXII area-detector diffractometer | 5023 independent reflections |
Radiation source: fine-focus sealed tube | 3269 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.028 |
ω and ϕ scans | θmax = 28.4°, θmin = 1.2° |
Absorption correction: multi-scan (Blessing, 1995) | h = −14→11 |
Tmin = 0.978, Tmax = 0.987 | k = −15→11 |
17736 measured reflections | l = −43→43 |
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)] = 0.049 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.152 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0744P)2 + 0.5831P] where P = (Fo2 + 2Fc2)/3 |
5023 reflections | (Δ/σ)max = 0.001 |
284 parameters | Δρmax = 0.24 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
C24H25N3O4 | V = 4233.9 (2) Å3 |
Mr = 419.47 | Z = 8 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 11.2074 (3) Å | µ = 0.09 mm−1 |
b = 11.2406 (3) Å | T = 293 K |
c = 33.6082 (9) Å | 0.25 × 0.17 × 0.15 mm |
Bruker Kappa APEXII area-detector diffractometer | 5023 independent reflections |
Absorption correction: multi-scan (Blessing, 1995) | 3269 reflections with I > 2σ(I) |
Tmin = 0.978, Tmax = 0.987 | Rint = 0.028 |
17736 measured reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.152 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.24 e Å−3 |
5023 reflections | Δρmin = −0.18 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 | ||
C1 | 0.01846 (15) | 0.47299 (15) | 0.12817 (5) | 0.0327 (4) | |
C2 | −0.06510 (14) | 0.36884 (14) | 0.11357 (5) | 0.0316 (4) | |
C3 | −0.09503 (15) | 0.40199 (16) | 0.06949 (5) | 0.0365 (4) | |
H3 | −0.0535 | 0.3440 | 0.0527 | 0.044* | |
C4 | −0.03321 (17) | 0.52114 (18) | 0.06291 (5) | 0.0433 (5) | |
H4A | −0.0046 | 0.5282 | 0.0358 | 0.052* | |
H4B | −0.0868 | 0.5868 | 0.0685 | 0.052* | |
C5 | −0.05564 (15) | 0.56643 (16) | 0.15170 (5) | 0.0357 (4) | |
C6 | 0.08728 (16) | 0.49862 (17) | 0.19406 (6) | 0.0408 (4) | |
C7 | 0.1549 (2) | 0.4819 (2) | 0.22787 (7) | 0.0582 (6) | |
H7 | 0.1375 | 0.5215 | 0.2515 | 0.070* | |
C8 | 0.2500 (2) | 0.4037 (2) | 0.22515 (7) | 0.0665 (7) | |
H8 | 0.2959 | 0.3885 | 0.2476 | 0.080* | |
C9 | 0.2780 (2) | 0.3480 (2) | 0.18998 (7) | 0.0608 (6) | |
H9 | 0.3434 | 0.2972 | 0.1888 | 0.073* | |
C10 | 0.20970 (17) | 0.36673 (17) | 0.15631 (6) | 0.0456 (5) | |
H10 | 0.2295 | 0.3301 | 0.1324 | 0.055* | |
C11 | 0.11189 (15) | 0.44049 (15) | 0.15873 (5) | 0.0353 (4) | |
C12 | −0.16608 (15) | 0.33962 (16) | 0.14310 (5) | 0.0371 (4) | |
H12A | −0.1860 | 0.4087 | 0.1591 | 0.045* | |
H12B | −0.2371 | 0.3133 | 0.1291 | 0.045* | |
C13 | −0.11700 (16) | 0.24208 (18) | 0.16851 (6) | 0.0425 (4) | |
C14 | 0.00594 (15) | 0.25280 (16) | 0.11418 (5) | 0.0350 (4) | |
C15 | −0.22493 (16) | 0.39732 (16) | 0.05782 (5) | 0.0364 (4) | |
C16 | −0.26396 (17) | 0.30838 (16) | 0.03233 (5) | 0.0402 (4) | |
H16 | −0.2092 | 0.2538 | 0.0224 | 0.048* | |
C17 | −0.38205 (17) | 0.29936 (17) | 0.02148 (6) | 0.0443 (5) | |
H17 | −0.4061 | 0.2395 | 0.0041 | 0.053* | |
C18 | −0.46497 (16) | 0.37864 (17) | 0.03623 (5) | 0.0385 (4) | |
C19 | −0.42807 (17) | 0.46898 (18) | 0.06074 (6) | 0.0455 (5) | |
H19 | −0.4829 | 0.5242 | 0.0702 | 0.055* | |
C20 | −0.30887 (17) | 0.47782 (18) | 0.07131 (6) | 0.0467 (5) | |
H20 | −0.2848 | 0.5395 | 0.0879 | 0.056* | |
C21 | −0.67018 (18) | 0.4326 (2) | 0.04175 (7) | 0.0595 (6) | |
H21A | −0.6672 | 0.4262 | 0.0702 | 0.089* | |
H21B | −0.7469 | 0.4068 | 0.0324 | 0.089* | |
H21C | −0.6575 | 0.5139 | 0.0341 | 0.089* | |
C22 | −0.0594 (2) | 0.6521 (2) | 0.21968 (7) | 0.0586 (6) | |
H22A | −0.1135 | 0.7077 | 0.2077 | 0.088* | |
H22B | 0.0048 | 0.6945 | 0.2322 | 0.088* | |
H22C | −0.1011 | 0.6058 | 0.2393 | 0.088* | |
C23 | 0.0372 (2) | 0.0838 (2) | 0.16109 (7) | 0.0633 (6) | |
H23A | 0.0928 | 0.1050 | 0.1816 | 0.095* | |
H23B | 0.0795 | 0.0491 | 0.1391 | 0.095* | |
H23C | −0.0193 | 0.0274 | 0.1713 | 0.095* | |
C24 | 0.12923 (19) | 0.63178 (18) | 0.09418 (7) | 0.0540 (5) | |
H24A | 0.0752 | 0.6924 | 0.1031 | 0.081* | |
H24B | 0.1609 | 0.6532 | 0.0686 | 0.081* | |
H24C | 0.1934 | 0.6240 | 0.1129 | 0.081* | |
N1 | −0.01162 (14) | 0.57366 (14) | 0.18924 (4) | 0.0424 (4) | |
N2 | 0.06588 (13) | 0.51895 (13) | 0.09103 (4) | 0.0381 (4) | |
N3 | −0.02527 (14) | 0.18934 (13) | 0.14773 (5) | 0.0416 (4) | |
O1 | −0.13847 (12) | 0.62471 (12) | 0.13906 (4) | 0.0506 (4) | |
O2 | 0.07934 (11) | 0.21993 (11) | 0.09054 (4) | 0.0455 (3) | |
O3 | −0.14963 (13) | 0.21122 (15) | 0.20112 (4) | 0.0626 (4) | |
O4 | −0.58015 (12) | 0.36018 (13) | 0.02477 (4) | 0.0529 (4) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0316 (9) | 0.0305 (9) | 0.0360 (9) | 0.0035 (7) | −0.0024 (7) | −0.0031 (7) |
C2 | 0.0300 (8) | 0.0310 (8) | 0.0337 (9) | 0.0008 (7) | 0.0001 (7) | −0.0048 (7) |
C3 | 0.0377 (9) | 0.0411 (10) | 0.0308 (9) | 0.0030 (8) | −0.0017 (7) | −0.0047 (8) |
C4 | 0.0462 (11) | 0.0472 (11) | 0.0365 (10) | −0.0004 (9) | −0.0011 (8) | 0.0048 (9) |
C5 | 0.0345 (9) | 0.0329 (9) | 0.0397 (10) | 0.0020 (8) | −0.0012 (8) | −0.0045 (8) |
C6 | 0.0390 (10) | 0.0426 (10) | 0.0409 (11) | −0.0025 (8) | −0.0057 (8) | −0.0017 (8) |
C7 | 0.0603 (13) | 0.0691 (15) | 0.0453 (12) | −0.0024 (12) | −0.0145 (10) | −0.0015 (11) |
C8 | 0.0634 (14) | 0.0700 (16) | 0.0662 (16) | 0.0002 (13) | −0.0310 (13) | 0.0131 (13) |
C9 | 0.0487 (12) | 0.0501 (12) | 0.0835 (17) | 0.0085 (10) | −0.0224 (12) | 0.0048 (12) |
C10 | 0.0367 (10) | 0.0390 (10) | 0.0611 (12) | 0.0032 (8) | −0.0081 (9) | −0.0028 (9) |
C11 | 0.0318 (9) | 0.0318 (9) | 0.0423 (10) | −0.0023 (7) | −0.0050 (8) | −0.0006 (8) |
C12 | 0.0317 (9) | 0.0398 (10) | 0.0400 (10) | −0.0002 (8) | 0.0002 (8) | −0.0027 (8) |
C13 | 0.0392 (10) | 0.0468 (11) | 0.0416 (11) | −0.0076 (9) | −0.0038 (9) | 0.0011 (9) |
C14 | 0.0350 (9) | 0.0315 (9) | 0.0385 (10) | −0.0002 (7) | −0.0022 (8) | −0.0044 (8) |
C15 | 0.0407 (10) | 0.0363 (9) | 0.0323 (9) | 0.0044 (8) | −0.0059 (8) | −0.0029 (8) |
C16 | 0.0436 (10) | 0.0376 (10) | 0.0394 (10) | 0.0054 (8) | −0.0029 (8) | −0.0079 (8) |
C17 | 0.0499 (11) | 0.0392 (10) | 0.0438 (11) | −0.0027 (9) | −0.0081 (9) | −0.0104 (9) |
C18 | 0.0379 (10) | 0.0417 (10) | 0.0360 (10) | −0.0021 (8) | −0.0071 (8) | 0.0024 (8) |
C19 | 0.0438 (11) | 0.0444 (11) | 0.0482 (11) | 0.0102 (9) | −0.0038 (9) | −0.0114 (9) |
C20 | 0.0457 (11) | 0.0451 (11) | 0.0492 (11) | 0.0061 (9) | −0.0118 (9) | −0.0176 (9) |
C21 | 0.0392 (11) | 0.0701 (15) | 0.0692 (15) | 0.0060 (11) | −0.0010 (10) | −0.0035 (12) |
C22 | 0.0547 (13) | 0.0710 (15) | 0.0501 (13) | 0.0037 (11) | 0.0039 (10) | −0.0247 (11) |
C23 | 0.0818 (16) | 0.0473 (13) | 0.0608 (14) | 0.0158 (12) | −0.0029 (12) | 0.0122 (11) |
C24 | 0.0500 (12) | 0.0444 (12) | 0.0675 (14) | −0.0118 (9) | 0.0000 (11) | 0.0069 (10) |
N1 | 0.0433 (9) | 0.0453 (9) | 0.0387 (9) | 0.0044 (7) | −0.0038 (7) | −0.0107 (7) |
N2 | 0.0369 (8) | 0.0362 (8) | 0.0411 (9) | −0.0048 (7) | 0.0012 (7) | 0.0017 (7) |
N3 | 0.0475 (9) | 0.0348 (8) | 0.0427 (9) | 0.0038 (7) | −0.0018 (7) | 0.0043 (7) |
O1 | 0.0501 (8) | 0.0470 (8) | 0.0548 (8) | 0.0192 (6) | −0.0080 (7) | −0.0098 (7) |
O2 | 0.0473 (7) | 0.0394 (7) | 0.0498 (8) | 0.0078 (6) | 0.0059 (6) | −0.0087 (6) |
O3 | 0.0606 (9) | 0.0849 (12) | 0.0423 (8) | −0.0018 (8) | 0.0053 (7) | 0.0165 (8) |
O4 | 0.0391 (8) | 0.0582 (9) | 0.0615 (9) | 0.0001 (6) | −0.0094 (7) | −0.0099 (7) |
C1—N2 | 1.452 (2) | C13—N3 | 1.377 (2) |
C1—C11 | 1.511 (2) | C14—O2 | 1.202 (2) |
C1—C5 | 1.555 (2) | C14—N3 | 1.379 (2) |
C1—C2 | 1.577 (2) | C15—C20 | 1.382 (2) |
C2—C14 | 1.528 (2) | C15—C16 | 1.387 (2) |
C2—C12 | 1.541 (2) | C16—C17 | 1.377 (3) |
C2—C3 | 1.564 (2) | C16—H16 | 0.93 |
C3—C15 | 1.509 (2) | C17—C18 | 1.380 (3) |
C3—C4 | 1.524 (3) | C17—H17 | 0.93 |
C3—H3 | 0.98 | C18—O4 | 1.363 (2) |
C4—N2 | 1.458 (2) | C18—C19 | 1.371 (3) |
C4—H4A | 0.97 | C19—C20 | 1.386 (3) |
C4—H4B | 0.97 | C19—H19 | 0.93 |
C5—O1 | 1.213 (2) | C20—H20 | 0.93 |
C5—N1 | 1.357 (2) | C21—O4 | 1.417 (2) |
C6—C7 | 1.379 (3) | C21—H21A | 0.96 |
C6—C11 | 1.383 (3) | C21—H21B | 0.96 |
C6—N1 | 1.402 (2) | C21—H21C | 0.96 |
C7—C8 | 1.384 (3) | C22—N1 | 1.453 (2) |
C7—H7 | 0.93 | C22—H22A | 0.96 |
C8—C9 | 1.374 (3) | C22—H22B | 0.96 |
C8—H8 | 0.93 | C22—H22C | 0.96 |
C9—C10 | 1.382 (3) | C23—N3 | 1.449 (2) |
C9—H9 | 0.93 | C23—H23A | 0.96 |
C10—C11 | 1.377 (2) | C23—H23B | 0.96 |
C10—H10 | 0.93 | C23—H23C | 0.96 |
C12—C13 | 1.495 (3) | C24—N2 | 1.457 (2) |
C12—H12A | 0.97 | C24—H24A | 0.96 |
C12—H12B | 0.97 | C24—H24B | 0.96 |
C13—O3 | 1.206 (2) | C24—H24C | 0.96 |
N2—C1—C11 | 114.62 (14) | O2—C14—C2 | 127.58 (17) |
N2—C1—C5 | 113.10 (14) | N3—C14—C2 | 108.69 (15) |
C11—C1—C5 | 100.82 (13) | C20—C15—C16 | 117.38 (16) |
N2—C1—C2 | 102.35 (13) | C20—C15—C3 | 123.29 (16) |
C11—C1—C2 | 116.31 (14) | C16—C15—C3 | 119.33 (16) |
C5—C1—C2 | 110.02 (13) | C17—C16—C15 | 121.32 (17) |
C14—C2—C12 | 101.07 (14) | C17—C16—H16 | 119.3 |
C14—C2—C3 | 109.14 (14) | C15—C16—H16 | 119.3 |
C12—C2—C3 | 120.23 (14) | C16—C17—C18 | 120.32 (17) |
C14—C2—C1 | 108.66 (13) | C16—C17—H17 | 119.8 |
C12—C2—C1 | 113.20 (13) | C18—C17—H17 | 119.8 |
C3—C2—C1 | 104.19 (13) | O4—C18—C19 | 124.61 (17) |
C15—C3—C4 | 115.57 (15) | O4—C18—C17 | 115.98 (16) |
C15—C3—C2 | 116.42 (14) | C19—C18—C17 | 119.41 (17) |
C4—C3—C2 | 104.44 (13) | C18—C19—C20 | 119.84 (18) |
C15—C3—H3 | 106.6 | C18—C19—H19 | 120.1 |
C4—C3—H3 | 106.6 | C20—C19—H19 | 120.1 |
C2—C3—H3 | 106.6 | C15—C20—C19 | 121.69 (17) |
N2—C4—C3 | 103.73 (14) | C15—C20—H20 | 119.2 |
N2—C4—H4A | 111.0 | C19—C20—H20 | 119.2 |
C3—C4—H4A | 111.0 | O4—C21—H21A | 109.5 |
N2—C4—H4B | 111.0 | O4—C21—H21B | 109.5 |
C3—C4—H4B | 111.0 | H21A—C21—H21B | 109.5 |
H4A—C4—H4B | 109.0 | O4—C21—H21C | 109.5 |
O1—C5—N1 | 124.84 (17) | H21A—C21—H21C | 109.5 |
O1—C5—C1 | 126.55 (16) | H21B—C21—H21C | 109.5 |
N1—C5—C1 | 108.61 (15) | N1—C22—H22A | 109.5 |
C7—C6—C11 | 122.24 (18) | N1—C22—H22B | 109.5 |
C7—C6—N1 | 127.72 (18) | H22A—C22—H22B | 109.5 |
C11—C6—N1 | 110.04 (15) | N1—C22—H22C | 109.5 |
C6—C7—C8 | 117.1 (2) | H22A—C22—H22C | 109.5 |
C6—C7—H7 | 121.5 | H22B—C22—H22C | 109.5 |
C8—C7—H7 | 121.5 | N3—C23—H23A | 109.5 |
C9—C8—C7 | 121.5 (2) | N3—C23—H23B | 109.5 |
C9—C8—H8 | 119.3 | H23A—C23—H23B | 109.5 |
C7—C8—H8 | 119.3 | N3—C23—H23C | 109.5 |
C8—C9—C10 | 120.6 (2) | H23A—C23—H23C | 109.5 |
C8—C9—H9 | 119.7 | H23B—C23—H23C | 109.5 |
C10—C9—H9 | 119.7 | N2—C24—H24A | 109.5 |
C11—C10—C9 | 118.96 (19) | N2—C24—H24B | 109.5 |
C11—C10—H10 | 120.5 | H24A—C24—H24B | 109.5 |
C9—C10—H10 | 120.5 | N2—C24—H24C | 109.5 |
C10—C11—C6 | 119.59 (17) | H24A—C24—H24C | 109.5 |
C10—C11—C1 | 131.08 (17) | H24B—C24—H24C | 109.5 |
C6—C11—C1 | 109.33 (15) | C5—N1—C6 | 111.01 (15) |
C13—C12—C2 | 104.72 (14) | C5—N1—C22 | 123.85 (17) |
C13—C12—H12A | 110.8 | C6—N1—C22 | 125.11 (16) |
C2—C12—H12A | 110.8 | C1—N2—C24 | 115.17 (15) |
C13—C12—H12B | 110.8 | C1—N2—C4 | 106.52 (13) |
C2—C12—H12B | 110.8 | C24—N2—C4 | 113.80 (15) |
H12A—C12—H12B | 108.9 | C13—N3—C14 | 112.41 (15) |
O3—C13—N3 | 124.28 (19) | C13—N3—C23 | 123.79 (17) |
O3—C13—C12 | 128.21 (18) | C14—N3—C23 | 123.66 (16) |
N3—C13—C12 | 107.50 (16) | C18—O4—C21 | 118.25 (16) |
O2—C14—N3 | 123.71 (17) | ||
N2—C1—C2—C14 | 93.48 (15) | C3—C2—C14—O2 | 35.9 (2) |
C11—C1—C2—C14 | −32.26 (19) | C1—C2—C14—O2 | −77.1 (2) |
C5—C1—C2—C14 | −146.03 (14) | C12—C2—C14—N3 | −17.91 (17) |
N2—C1—C2—C12 | −155.10 (13) | C3—C2—C14—N3 | −145.57 (14) |
C11—C1—C2—C12 | 79.16 (18) | C1—C2—C14—N3 | 101.41 (15) |
C5—C1—C2—C12 | −34.61 (18) | C4—C3—C15—C20 | −52.9 (2) |
N2—C1—C2—C3 | −22.77 (15) | C2—C3—C15—C20 | 70.3 (2) |
C11—C1—C2—C3 | −148.51 (14) | C4—C3—C15—C16 | 127.21 (18) |
C5—C1—C2—C3 | 97.71 (15) | C2—C3—C15—C16 | −109.68 (18) |
C14—C2—C3—C15 | 113.00 (16) | C20—C15—C16—C17 | −1.2 (3) |
C12—C2—C3—C15 | −2.9 (2) | C3—C15—C16—C17 | 178.77 (17) |
C1—C2—C3—C15 | −131.08 (15) | C15—C16—C17—C18 | −0.7 (3) |
C14—C2—C3—C4 | −118.28 (15) | C16—C17—C18—O4 | −178.00 (17) |
C12—C2—C3—C4 | 125.78 (16) | C16—C17—C18—C19 | 2.2 (3) |
C1—C2—C3—C4 | −2.36 (17) | O4—C18—C19—C20 | 178.42 (18) |
C15—C3—C4—N2 | 155.96 (14) | C17—C18—C19—C20 | −1.8 (3) |
C2—C3—C4—N2 | 26.73 (18) | C16—C15—C20—C19 | 1.6 (3) |
N2—C1—C5—O1 | 52.8 (2) | C3—C15—C20—C19 | −178.35 (18) |
C11—C1—C5—O1 | 175.67 (18) | C18—C19—C20—C15 | −0.1 (3) |
C2—C1—C5—O1 | −61.0 (2) | O1—C5—N1—C6 | −177.45 (18) |
N2—C1—C5—N1 | −126.61 (16) | C1—C5—N1—C6 | 2.0 (2) |
C11—C1—C5—N1 | −3.74 (18) | O1—C5—N1—C22 | 0.8 (3) |
C2—C1—C5—N1 | 119.62 (15) | C1—C5—N1—C22 | −179.82 (17) |
C11—C6—C7—C8 | 0.0 (3) | C7—C6—N1—C5 | −179.8 (2) |
N1—C6—C7—C8 | −179.1 (2) | C11—C6—N1—C5 | 0.9 (2) |
C6—C7—C8—C9 | 2.0 (4) | C7—C6—N1—C22 | 2.0 (3) |
C7—C8—C9—C10 | −1.5 (4) | C11—C6—N1—C22 | −177.27 (18) |
C8—C9—C10—C11 | −1.1 (3) | C11—C1—N2—C24 | −64.5 (2) |
C9—C10—C11—C6 | 3.1 (3) | C5—C1—N2—C24 | 50.3 (2) |
C9—C10—C11—C1 | −176.66 (19) | C2—C1—N2—C24 | 168.64 (14) |
C7—C6—C11—C10 | −2.6 (3) | C11—C1—N2—C4 | 168.29 (15) |
N1—C6—C11—C10 | 176.70 (16) | C5—C1—N2—C4 | −76.88 (17) |
C7—C6—C11—C1 | 177.21 (18) | C2—C1—N2—C4 | 41.45 (16) |
N1—C6—C11—C1 | −3.5 (2) | C3—C4—N2—C1 | −43.87 (18) |
N2—C1—C11—C10 | −54.1 (3) | C3—C4—N2—C24 | −171.88 (15) |
C5—C1—C11—C10 | −175.93 (19) | O3—C13—N3—C14 | −170.56 (18) |
C2—C1—C11—C10 | 65.2 (2) | C12—C13—N3—C14 | 10.2 (2) |
N2—C1—C11—C6 | 126.08 (16) | O3—C13—N3—C23 | 5.3 (3) |
C5—C1—C11—C6 | 4.28 (18) | C12—C13—N3—C23 | −174.00 (18) |
C2—C1—C11—C6 | −114.63 (16) | O2—C14—N3—C13 | −175.89 (17) |
C14—C2—C12—C13 | 22.91 (17) | C2—C14—N3—C13 | 5.5 (2) |
C3—C2—C12—C13 | 142.96 (15) | O2—C14—N3—C23 | 8.3 (3) |
C1—C2—C12—C13 | −93.10 (16) | C2—C14—N3—C23 | −170.30 (17) |
C2—C12—C13—O3 | 159.54 (19) | C19—C18—O4—C21 | −5.5 (3) |
C2—C12—C13—N3 | −21.23 (19) | C17—C18—O4—C21 | 174.65 (18) |
C12—C2—C14—O2 | 163.58 (17) |
D—H···A | D—H | H···A | D···A | D—H···A |
C10—H10···O2 | 0.93 | 2.52 | 3.122 (2) | 123 |
C12—H12A···O1 | 0.97 | 2.58 | 3.222 (2) | 124 |
C20—H20···O1 | 0.93 | 2.56 | 3.400 (2) | 150 |
C12—H12B···O1i | 0.97 | 2.56 | 3.264 (2) | 129 |
C16—H16···O4ii | 0.93 | 2.50 | 3.394 (2) | 161 |
C19—H19···O2iii | 0.93 | 2.54 | 3.440 (2) | 162 |
C21—H21C···Cg1iv | 0.96 | 2.93 | 3.592 (2) | 127 |
Symmetry codes: (i) −x−1/2, y−1/2, z; (ii) x+1/2, −y+1/2, −z; (iii) −x−1/2, y+1/2, z; (iv) −x+1, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C24H25N3O4 |
Mr | 419.47 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 293 |
a, b, c (Å) | 11.2074 (3), 11.2406 (3), 33.6082 (9) |
V (Å3) | 4233.9 (2) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.25 × 0.17 × 0.15 |
Data collection | |
Diffractometer | Bruker Kappa APEXII area-detector diffractometer |
Absorption correction | Multi-scan (Blessing, 1995) |
Tmin, Tmax | 0.978, 0.987 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 17736, 5023, 3269 |
Rint | 0.028 |
(sin θ/λ)max (Å−1) | 0.669 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.152, 1.07 |
No. of reflections | 5023 |
No. of parameters | 284 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.24, −0.18 |
Computer programs: APEX2 (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
C10—H10···O2 | 0.93 | 2.52 | 3.122 (2) | 123 |
C12—H12A···O1 | 0.97 | 2.58 | 3.222 (2) | 124 |
C20—H20···O1 | 0.93 | 2.56 | 3.400 (2) | 150 |
C12—H12B···O1i | 0.97 | 2.56 | 3.264 (2) | 129 |
C16—H16···O4ii | 0.93 | 2.50 | 3.394 (2) | 161 |
C19—H19···O2iii | 0.93 | 2.54 | 3.440 (2) | 162 |
C21—H21C···Cg1iv | 0.96 | 2.93 | 3.592 (2) | 127 |
Symmetry codes: (i) −x−1/2, y−1/2, z; (ii) x+1/2, −y+1/2, −z; (iii) −x−1/2, y+1/2, z; (iv) −x+1, −y+1, −z. |
Acknowledgements
SN thanks Dr Babu Vargheese, SAIF, IIT Madras, India, for his help with the data collection. SN also thanks SRM management, India, for their support.
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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.
Spiro compounds are a particular class of naturally occurring substances characterized by highly pronounced biological properties (Kobayashi et al., 1991; James et al., 1991). The spiro-pyrrolidine ring system is also found in phermones, antibiotics (Gore et al., 1991) and antitumour agents (Tietze et al., 1988; Araki et al., 2002).
Indole compounds can be used as bioactive drugs (Stevenson et al., 2000). Indole derivatives exhibit antiallergic, central nervous system depressant and muscle relaxant properties (Harris & Uhle, 1960; Ho et al., 1986). In view of this biological importance, the crystal structure of the title compound was determined and the results are presented here.
An ORTEP (Farrugia,1997) plot of the molecule is shown in Fig.1. The indole unit is planar, with a maximum deviation of -0.050 (9) Å for atom C1. The dihedral angle between the indole unit and the methoxyphenyl ring is 40.36 (4)°. The sum of angles at atoms N1 (360.0°) and N3 (359.9°) is in accordance with sp2 hybridization, whereas the sum of angles at N2 (335.5°) is in accordance with sp3 hybridization. The N1—C5 and C5—O1 bond lengths show electron delocalization over atoms N1, C5 and O1. In the oxindole ring system, the variation in endocyclic angles are due to the fusion of the five- and six-membered rings (Govind et al., 2003). The methoxy group is almost coplanar with the C15-C20 benzene ring [C21—O4—C18—C17 = 174.7 (2)°]. The N2/C1-C4 pyrrolidine ring adopts an envelope conformation with puckering parameters q2 and ϕ of 0.404 (2) Å and -38.8 (2)° respectively (Cremer & Pople, 1975). Atom N2 deviates by 0.590 Å from the least-squares plane through the remaining four atoms. The N3/C2/C12-C14 pyrrolidine ring adopts a twist conformation, with puckering parameters q2 and ϕ of 0.233 (2) Å and -13.2 (4)° respectively (Cremer & Pople, 1975).
The molecular structure is stabilized by intramolecular C— H···O hydrogen bonds and the crystal packing is determined by intermolecular C—H···O hydrogen bonds and C—H···π interactions involving C15—C20 benzene rings (Table 1). In addition the packing is stabilized by van der Waals forces.