organic compounds
(3aR,8bR)-3a,8b-Dihydroxy-1-(4-methoxyphenyl)-2-methylsulfanyl-3-nitro-1,8b-dihydroindeno[1,2-b]pyrrol-4(3aH)-one
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
In the title compound, C19H16N2O6S, the pyrrolidine ring adopts a twisted conformation with puckering parameters q2 = 0.088 (3) Å and Φ2 = 61.5 (14)°. The cyclopentane ring adopts a twisted conformation with puckering parameters q2 = 0.099 (2) Å and Φ2 = 242.8 (14)°. A weak intramolecular O—H⋯O interaction occurs. In the crystal, pairs of C—H⋯O interactions generate dimers with graph-set motif R22(24) and they are interconnected by pairs of O—H⋯O hydrogen bonds, which link the molecules into inversion dimers with graph-set motif R22(10).
CCDC reference: 972037
Related literature
For the importance of pyrrolidine derivatives, see: Cordell (1981); Morais et al. (2009); Bello et al. (2010); Obniska et al. (2010). For related structures, see: Liu et al. (2008); Ghorbani (2012). For additional conformation analysis, see: Cremer & Pople (1975).
Experimental
Crystal data
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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
CCDC reference: 972037
10.1107/S1600536813031279/zq2211sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813031279/zq2211Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813031279/zq2211Isup3.cml
A mixture of (E)-4-methoxy-N-(1-(methylthio)-2-nitrovinyl)aniline (1 mmol) with ninhydrin (1 mmol) in presence of glacial AcOH (3–5 drops) was thoroughly ground in a pestle and mortar at room temperature for 2–10 min. The reaction progress was monitored by thin layer
After completion of the reaction, the reaction mixture was triturated with crushed ice, the resulting solid filtered off and washed with water to afford the pure product. The compound was further recrystallized from ethanol to obtain suitable crystals for X-ray analysis. Melting point 473 K - 475 K. Yield: 95%H atoms were placed at calculated positions and allowed to ride on their carrier atoms with C—H = 0.93–0.98 Å and O—H = 0.82 Å. Uiso = 1.2Ueq(C) for CH2 and CH groups and Uiso = 1.5Ueq(C) for CH3 and OH groups.
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).C19H16N2O6S | F(000) = 832 |
Mr = 400.40 | Dx = 1.503 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -p 2yn | Cell parameters from 2000 reflections |
a = 13.6601 (7) Å | θ = 2–31° |
b = 8.5782 (5) Å | µ = 0.23 mm−1 |
c = 15.2373 (8) Å | T = 293 K |
β = 97.684 (3)° | Block, yellow |
V = 1769.46 (17) Å3 | 0.21 × 0.19 × 0.18 mm |
Z = 4 |
Bruker Kappa APEXII diffractometer | 3311 independent reflections |
Radiation source: fine-focus sealed tube | 2661 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.047 |
Detector resolution: 0 pixels mm-1 | θmax = 25.5°, θmin = 1.9° |
ω and ϕ scans | h = −16→15 |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | k = −10→7 |
Tmin = 0.967, Tmax = 0.974 | l = −17→18 |
13771 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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.155 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.0989P)2 + 0.7209P] where P = (Fo2 + 2Fc2)/3 |
3311 reflections | (Δ/σ)max < 0.001 |
253 parameters | Δρmax = 0.42 e Å−3 |
0 restraints | Δρmin = −0.44 e Å−3 |
C19H16N2O6S | V = 1769.46 (17) Å3 |
Mr = 400.40 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 13.6601 (7) Å | µ = 0.23 mm−1 |
b = 8.5782 (5) Å | T = 293 K |
c = 15.2373 (8) Å | 0.21 × 0.19 × 0.18 mm |
β = 97.684 (3)° |
Bruker Kappa APEXII diffractometer | 3311 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2661 reflections with I > 2σ(I) |
Tmin = 0.967, Tmax = 0.974 | Rint = 0.047 |
13771 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.155 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.42 e Å−3 |
3311 reflections | Δρmin = −0.44 e Å−3 |
253 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 F.2 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 | 0.70509 (13) | 0.0236 (3) | 0.42776 (14) | 0.0363 (5) | |
C2 | 0.82032 (13) | 0.0315 (3) | 0.43000 (14) | 0.0375 (5) | |
C3 | 0.82888 (14) | 0.0735 (3) | 0.33568 (15) | 0.0387 (5) | |
C4 | 0.73865 (14) | 0.0682 (2) | 0.28246 (14) | 0.0361 (5) | |
C5 | 0.60238 (18) | 0.0213 (4) | 0.12776 (17) | 0.0575 (7) | |
H5A | 0.5917 | 0.0297 | 0.0644 | 0.086* | |
H5B | 0.5551 | 0.0849 | 0.1525 | 0.086* | |
H5C | 0.5948 | −0.0854 | 0.1446 | 0.086* | |
C6 | 0.85309 (15) | 0.1658 (3) | 0.49362 (14) | 0.0407 (5) | |
C7 | 0.76369 (15) | 0.2479 (3) | 0.51268 (14) | 0.0410 (5) | |
C8 | 0.67980 (14) | 0.1644 (3) | 0.48003 (13) | 0.0389 (5) | |
C9 | 0.58736 (16) | 0.2127 (3) | 0.49893 (14) | 0.0468 (6) | |
H9 | 0.5307 | 0.1555 | 0.4797 | 0.056* | |
C10 | 0.58276 (19) | 0.3479 (3) | 0.54700 (16) | 0.0557 (7) | |
H10 | 0.5218 | 0.3826 | 0.5599 | 0.067* | |
C11 | 0.6668 (2) | 0.4338 (3) | 0.57670 (18) | 0.0609 (7) | |
H11 | 0.6611 | 0.5260 | 0.6077 | 0.073* | |
C12 | 0.75837 (19) | 0.3837 (3) | 0.56070 (16) | 0.0540 (6) | |
H12 | 0.8151 | 0.4395 | 0.5816 | 0.065* | |
C13 | 0.56455 (13) | 0.0879 (2) | 0.31000 (13) | 0.0337 (5) | |
C14 | 0.54498 (14) | 0.2415 (3) | 0.28747 (14) | 0.0393 (5) | |
H14 | 0.5967 | 0.3094 | 0.2813 | 0.047* | |
C15 | 0.44902 (14) | 0.2942 (3) | 0.27415 (15) | 0.0413 (5) | |
H15 | 0.4355 | 0.3966 | 0.2565 | 0.050* | |
C16 | 0.37246 (13) | 0.1939 (3) | 0.28725 (14) | 0.0367 (5) | |
C17 | 0.39162 (14) | 0.0406 (3) | 0.30889 (15) | 0.0400 (5) | |
H17 | 0.3400 | −0.0268 | 0.3164 | 0.048* | |
C18 | 0.48858 (14) | −0.0138 (3) | 0.31960 (14) | 0.0377 (5) | |
H18 | 0.5020 | −0.1180 | 0.3331 | 0.045* | |
C19 | 0.20231 (15) | 0.1754 (3) | 0.30760 (19) | 0.0563 (7) | |
H19A | 0.1421 | 0.2340 | 0.2963 | 0.085* | |
H19B | 0.2181 | 0.1579 | 0.3701 | 0.085* | |
H19C | 0.1942 | 0.0771 | 0.2774 | 0.085* | |
N1 | 0.66559 (11) | 0.0372 (2) | 0.33164 (11) | 0.0349 (4) | |
N2 | 0.91927 (13) | 0.0968 (2) | 0.30602 (14) | 0.0452 (5) | |
O1 | 0.93701 (11) | 0.1960 (2) | 0.52411 (12) | 0.0554 (5) | |
O2 | 0.67032 (10) | −0.11114 (19) | 0.46335 (10) | 0.0443 (4) | |
H2 | 0.6844 | −0.1868 | 0.4346 | 0.066* | |
O3 | 0.86160 (10) | −0.11224 (19) | 0.45807 (11) | 0.0475 (4) | |
H3 | 0.9208 | −0.1119 | 0.4537 | 0.071* | |
O4 | 0.92122 (12) | 0.1327 (2) | 0.22720 (13) | 0.0597 (5) | |
O5 | 0.99515 (11) | 0.0817 (2) | 0.35945 (13) | 0.0621 (5) | |
O6 | 0.28043 (9) | 0.2606 (2) | 0.27626 (11) | 0.0473 (4) | |
S1 | 0.72558 (4) | 0.08679 (9) | 0.16864 (4) | 0.0526 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0206 (9) | 0.0434 (13) | 0.0459 (11) | 0.0030 (8) | 0.0079 (8) | 0.0032 (9) |
C2 | 0.0209 (9) | 0.0407 (12) | 0.0519 (12) | 0.0040 (8) | 0.0077 (8) | −0.0005 (9) |
C3 | 0.0242 (9) | 0.0430 (13) | 0.0514 (12) | 0.0010 (8) | 0.0143 (8) | −0.0048 (9) |
C4 | 0.0274 (9) | 0.0350 (11) | 0.0483 (11) | 0.0048 (8) | 0.0138 (8) | 0.0023 (9) |
C5 | 0.0478 (13) | 0.0747 (19) | 0.0499 (13) | 0.0045 (12) | 0.0060 (10) | −0.0085 (13) |
C6 | 0.0293 (10) | 0.0464 (13) | 0.0466 (11) | 0.0039 (9) | 0.0056 (8) | −0.0001 (10) |
C7 | 0.0343 (10) | 0.0467 (13) | 0.0424 (11) | 0.0065 (9) | 0.0067 (8) | 0.0003 (9) |
C8 | 0.0295 (10) | 0.0468 (13) | 0.0416 (10) | 0.0076 (8) | 0.0095 (8) | 0.0019 (9) |
C9 | 0.0335 (10) | 0.0617 (16) | 0.0482 (12) | 0.0097 (10) | 0.0158 (9) | 0.0032 (11) |
C10 | 0.0508 (14) | 0.0675 (18) | 0.0533 (13) | 0.0196 (12) | 0.0235 (11) | −0.0003 (12) |
C11 | 0.0675 (17) | 0.0617 (18) | 0.0571 (15) | 0.0136 (13) | 0.0216 (13) | −0.0126 (13) |
C12 | 0.0523 (14) | 0.0603 (17) | 0.0505 (13) | 0.0019 (11) | 0.0104 (11) | −0.0109 (12) |
C13 | 0.0189 (9) | 0.0404 (12) | 0.0426 (11) | 0.0019 (7) | 0.0074 (7) | 0.0010 (8) |
C14 | 0.0219 (9) | 0.0413 (13) | 0.0568 (12) | −0.0010 (8) | 0.0136 (8) | 0.0046 (10) |
C15 | 0.0272 (10) | 0.0400 (13) | 0.0583 (13) | 0.0042 (8) | 0.0118 (9) | 0.0090 (10) |
C16 | 0.0200 (9) | 0.0449 (13) | 0.0457 (11) | 0.0024 (8) | 0.0068 (7) | −0.0011 (9) |
C17 | 0.0218 (9) | 0.0444 (13) | 0.0547 (12) | −0.0044 (8) | 0.0086 (8) | 0.0008 (10) |
C18 | 0.0273 (9) | 0.0364 (12) | 0.0504 (12) | 0.0003 (8) | 0.0085 (8) | 0.0018 (9) |
C19 | 0.0245 (10) | 0.0686 (17) | 0.0778 (17) | 0.0003 (10) | 0.0140 (10) | 0.0083 (14) |
N1 | 0.0186 (7) | 0.0440 (11) | 0.0436 (9) | 0.0031 (6) | 0.0094 (6) | 0.0022 (8) |
N2 | 0.0292 (9) | 0.0450 (12) | 0.0653 (13) | −0.0016 (7) | 0.0203 (8) | −0.0069 (9) |
O1 | 0.0299 (8) | 0.0645 (12) | 0.0697 (11) | 0.0010 (7) | −0.0008 (7) | −0.0141 (9) |
O2 | 0.0334 (8) | 0.0465 (10) | 0.0547 (9) | 0.0002 (6) | 0.0126 (6) | 0.0093 (7) |
O3 | 0.0247 (7) | 0.0448 (10) | 0.0719 (11) | 0.0070 (6) | 0.0022 (7) | 0.0016 (8) |
O4 | 0.0439 (9) | 0.0645 (12) | 0.0767 (12) | −0.0021 (8) | 0.0300 (8) | 0.0084 (10) |
O5 | 0.0217 (8) | 0.0881 (14) | 0.0779 (12) | −0.0032 (7) | 0.0118 (8) | −0.0144 (10) |
O6 | 0.0194 (6) | 0.0518 (10) | 0.0723 (10) | 0.0048 (6) | 0.0117 (6) | 0.0072 (8) |
S1 | 0.0402 (3) | 0.0725 (5) | 0.0474 (4) | 0.0029 (3) | 0.0146 (3) | 0.0101 (3) |
C1—O2 | 1.387 (3) | C11—C12 | 1.375 (4) |
C1—N1 | 1.496 (3) | C11—H11 | 0.9300 |
C1—C8 | 1.512 (3) | C12—H12 | 0.9300 |
C1—C2 | 1.571 (2) | C13—C14 | 1.378 (3) |
C2—O3 | 1.399 (3) | C13—C18 | 1.379 (3) |
C2—C3 | 1.501 (3) | C13—N1 | 1.443 (2) |
C2—C6 | 1.533 (3) | C14—C15 | 1.376 (3) |
C3—C4 | 1.383 (3) | C14—H14 | 0.9300 |
C3—N2 | 1.385 (3) | C15—C16 | 1.389 (3) |
C4—N1 | 1.352 (3) | C15—H15 | 0.9300 |
C4—S1 | 1.727 (2) | C16—O6 | 1.371 (2) |
C5—S1 | 1.804 (3) | C16—C17 | 1.372 (3) |
C5—H5A | 0.9600 | C17—C18 | 1.393 (3) |
C5—H5B | 0.9600 | C17—H17 | 0.9300 |
C5—H5C | 0.9600 | C18—H18 | 0.9300 |
C6—O1 | 1.206 (3) | C19—O6 | 1.427 (3) |
C6—C7 | 1.472 (3) | C19—H19A | 0.9600 |
C7—C12 | 1.383 (3) | C19—H19B | 0.9600 |
C7—C8 | 1.386 (3) | C19—H19C | 0.9600 |
C8—C9 | 1.395 (3) | N2—O5 | 1.236 (3) |
C9—C10 | 1.378 (4) | N2—O4 | 1.244 (3) |
C9—H9 | 0.9300 | O2—H2 | 0.8200 |
C10—C11 | 1.388 (4) | O3—H3 | 0.8200 |
C10—H10 | 0.9300 | ||
O2—C1—N1 | 110.51 (17) | C12—C11—H11 | 119.7 |
O2—C1—C8 | 110.19 (16) | C10—C11—H11 | 119.7 |
N1—C1—C8 | 112.04 (17) | C11—C12—C7 | 118.1 (2) |
O2—C1—C2 | 114.95 (16) | C11—C12—H12 | 121.0 |
N1—C1—C2 | 104.30 (15) | C7—C12—H12 | 121.0 |
C8—C1—C2 | 104.65 (16) | C14—C13—C18 | 120.52 (18) |
O3—C2—C3 | 115.10 (17) | C14—C13—N1 | 119.52 (17) |
O3—C2—C6 | 113.41 (17) | C18—C13—N1 | 119.71 (19) |
C3—C2—C6 | 111.82 (18) | C15—C14—C13 | 120.01 (19) |
O3—C2—C1 | 109.29 (17) | C15—C14—H14 | 120.0 |
C3—C2—C1 | 101.28 (15) | C13—C14—H14 | 120.0 |
C6—C2—C1 | 104.66 (16) | C14—C15—C16 | 119.7 (2) |
C4—C3—N2 | 125.2 (2) | C14—C15—H15 | 120.1 |
C4—C3—C2 | 112.11 (17) | C16—C15—H15 | 120.1 |
N2—C3—C2 | 122.27 (18) | O6—C16—C17 | 124.89 (18) |
N1—C4—C3 | 110.34 (18) | O6—C16—C15 | 114.77 (19) |
N1—C4—S1 | 126.15 (16) | C17—C16—C15 | 120.34 (18) |
C3—C4—S1 | 123.39 (15) | C16—C17—C18 | 119.81 (19) |
S1—C5—H5A | 109.5 | C16—C17—H17 | 120.1 |
S1—C5—H5B | 109.5 | C18—C17—H17 | 120.1 |
H5A—C5—H5B | 109.5 | C13—C18—C17 | 119.5 (2) |
S1—C5—H5C | 109.5 | C13—C18—H18 | 120.2 |
H5A—C5—H5C | 109.5 | C17—C18—H18 | 120.2 |
H5B—C5—H5C | 109.5 | O6—C19—H19A | 109.5 |
O1—C6—C7 | 126.3 (2) | O6—C19—H19B | 109.5 |
O1—C6—C2 | 125.94 (19) | H19A—C19—H19B | 109.5 |
C7—C6—C2 | 107.72 (17) | O6—C19—H19C | 109.5 |
C12—C7—C8 | 121.7 (2) | H19A—C19—H19C | 109.5 |
C12—C7—C6 | 127.7 (2) | H19B—C19—H19C | 109.5 |
C8—C7—C6 | 110.5 (2) | C4—N1—C13 | 124.66 (17) |
C7—C8—C9 | 120.0 (2) | C4—N1—C1 | 111.19 (15) |
C7—C8—C1 | 111.45 (17) | C13—N1—C1 | 117.14 (15) |
C9—C8—C1 | 128.5 (2) | O5—N2—O4 | 122.52 (18) |
C10—C9—C8 | 117.8 (2) | O5—N2—C3 | 118.4 (2) |
C10—C9—H9 | 121.1 | O4—N2—C3 | 119.08 (19) |
C8—C9—H9 | 121.1 | C1—O2—H2 | 109.5 |
C9—C10—C11 | 121.7 (2) | C2—O3—H3 | 109.5 |
C9—C10—H10 | 119.1 | C16—O6—C19 | 117.35 (18) |
C11—C10—H10 | 119.1 | C4—S1—C5 | 106.52 (11) |
C12—C11—C10 | 120.6 (3) | ||
O2—C1—C2—O3 | 7.7 (2) | C7—C8—C9—C10 | 2.8 (3) |
N1—C1—C2—O3 | −113.49 (18) | C1—C8—C9—C10 | −178.9 (2) |
C8—C1—C2—O3 | 128.67 (18) | C8—C9—C10—C11 | −0.5 (4) |
O2—C1—C2—C3 | 129.54 (19) | C9—C10—C11—C12 | −1.6 (4) |
N1—C1—C2—C3 | 8.4 (2) | C10—C11—C12—C7 | 1.4 (4) |
C8—C1—C2—C3 | −109.45 (18) | C8—C7—C12—C11 | 0.9 (4) |
O2—C1—C2—C6 | −114.1 (2) | C6—C7—C12—C11 | −174.7 (2) |
N1—C1—C2—C6 | 124.73 (18) | C18—C13—C14—C15 | −0.2 (3) |
C8—C1—C2—C6 | 6.9 (2) | N1—C13—C14—C15 | −174.4 (2) |
O3—C2—C3—C4 | 109.7 (2) | C13—C14—C15—C16 | 2.8 (3) |
C6—C2—C3—C4 | −119.03 (19) | C14—C15—C16—O6 | 177.0 (2) |
C1—C2—C3—C4 | −8.1 (2) | C14—C15—C16—C17 | −3.4 (3) |
O3—C2—C3—N2 | −63.6 (3) | O6—C16—C17—C18 | −179.1 (2) |
C6—C2—C3—N2 | 67.7 (3) | C15—C16—C17—C18 | 1.4 (3) |
C1—C2—C3—N2 | 178.6 (2) | C14—C13—C18—C17 | −1.9 (3) |
N2—C3—C4—N1 | 177.5 (2) | N1—C13—C18—C17 | 172.37 (19) |
C2—C3—C4—N1 | 4.4 (3) | C16—C17—C18—C13 | 1.3 (3) |
N2—C3—C4—S1 | 1.3 (3) | C3—C4—N1—C13 | 151.4 (2) |
C2—C3—C4—S1 | −171.80 (15) | S1—C4—N1—C13 | −32.5 (3) |
O3—C2—C6—O1 | 49.2 (3) | C3—C4—N1—C1 | 1.8 (2) |
C3—C2—C6—O1 | −82.9 (3) | S1—C4—N1—C1 | 177.84 (15) |
C1—C2—C6—O1 | 168.3 (2) | C14—C13—N1—C4 | −48.6 (3) |
O3—C2—C6—C7 | −129.12 (18) | C18—C13—N1—C4 | 137.1 (2) |
C3—C2—C6—C7 | 98.72 (19) | C14—C13—N1—C1 | 99.4 (2) |
C1—C2—C6—C7 | −10.1 (2) | C18—C13—N1—C1 | −74.9 (3) |
O1—C6—C7—C12 | 7.6 (4) | O2—C1—N1—C4 | −130.78 (17) |
C2—C6—C7—C12 | −174.1 (2) | C8—C1—N1—C4 | 105.92 (19) |
O1—C6—C7—C8 | −168.5 (2) | C2—C1—N1—C4 | −6.7 (2) |
C2—C6—C7—C8 | 9.9 (3) | O2—C1—N1—C13 | 77.1 (2) |
C12—C7—C8—C9 | −3.1 (3) | C8—C1—N1—C13 | −46.2 (2) |
C6—C7—C8—C9 | 173.2 (2) | C2—C1—N1—C13 | −158.86 (17) |
C12—C7—C8—C1 | 178.3 (2) | C4—C3—N2—O5 | −172.1 (2) |
C6—C7—C8—C1 | −5.3 (3) | C2—C3—N2—O5 | 0.3 (3) |
O2—C1—C8—C7 | 122.85 (19) | C4—C3—N2—O4 | 8.2 (3) |
N1—C1—C8—C7 | −113.67 (19) | C2—C3—N2—O4 | −179.4 (2) |
C2—C1—C8—C7 | −1.3 (2) | C17—C16—O6—C19 | 14.1 (3) |
O2—C1—C8—C9 | −55.6 (3) | C15—C16—O6—C19 | −166.3 (2) |
N1—C1—C8—C9 | 67.9 (3) | N1—C4—S1—C5 | −10.5 (2) |
C2—C1—C8—C9 | −179.7 (2) | C3—C4—S1—C5 | 165.1 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H3···O5 | 0.82 | 2.50 | 3.014 (3) | 122 |
O3—H3···O1i | 0.82 | 2.06 | 2.821 (2) | 155 |
C11—H11···O6ii | 0.93 | 2.60 | 3.461 (3) | 155 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) −x+1, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
O3—H3···O5 | 0.82 | 2.50 | 3.014 (3) | 122.0 |
O3—H3···O1i | 0.82 | 2.06 | 2.821 (2) | 154.8 |
C11—H11···O6ii | 0.93 | 2.60 | 3.461 (3) | 155.1 |
Symmetry codes: (i) −x+2, −y, −z+1; (ii) −x+1, −y+1, −z+1. |
Acknowledgements
JS and RAN thank the management of the Madura College for their encouragement and support. RRK thanks the DST, New Delhi, for funds under the fast-track scheme (No. SR/FT/CS-073/2009)
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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.
Pyrrolidine ring system is a frequently encountered structural motif in many biologically relevant alkaloids (Cordell, 1981). Pyrrolidine derivatives possess anticonvulsant (Obniska et al., 2010), anti-angiogenic (Morais et al., 2009) and antitumor activities (Bello et al., 2010). In view of the high medicinal value of these compounds in conjunction with our research interests, prompted us to synthesize and report the X-ray studies of the title compound (Fig. 1).
In the title compound, C19H16N2O6S, the pyrrolidine ring (N1/C1/C2/C3/C4) adopts a twisted conformation with the puckering parameters q2 = 0.088 (3) Å and Φ2 = 61.5 (14) °. The cyclopentane ring (C1/C2/C6–C8) adopts a twisted conformation with the puckering parameters q2 = 0.099 (2) Å and Φ2 = 242.8 (14) °. The benzene ring of the indane ring is planar with a r.m.s deviation of 0.0113 (1) °. The methoxy benzene ring (C13–C18) is planar with a r.m.s. deviation of 0.0120 Å. The sum of the C—N—C bond angles around N1 atom (352.99 (18)°) is implying a noticeable flattening of the trigonal pyramidal geometry about N1. The conformation of the methylsulfanyl moiety is antiperiplanar, as evidenced from the torsion angles C5—S1—C4—C3 = 165.1 (2) °. The bond length C4—S1 = 1.727 (2) Å is shorter than S1—C5 = 1.804 (3) Å as found in a similar structure (Ghorbani, 2012). The methyl group of the methyl sulfanyl substituent is tilted towards the plane of the benzene ring as indicated by the angle C4—S1—C5 = 106.52 (11) °. Due to the p - π conjugation of atom O6, the bond distance of O6—C16 (1.371 (2) Å) is significantly shorter than the bond distance of O6—C19 (1.427 (3) Å) as found in a similar structure (Liu et al., 2008). The dihedral angle 68.8 (1) ° between the mean planes of the phenyl ring and of the pyrrolidine ring (C1/C3/C4/N1) indicates that the substituent at N1 is in an equatorial position. The shorter bond lengths, C4—N1 (1.352 (3) Å), C3—N2 (1.385 (3) Å) than the normal C—N (1.47 Å) indicate the electron donating effects of nitrogen atoms.
The crystal structure features a weak intramolecular O—H···O interaction and some intermolecular C—H···O and O—H···O interactions. The O3—H3···O1i (symmetry code: i = -x+2, -y, -z+1) intermolecular interaction connects, inversely related dimers generating a graph set motif R22(10) (Cremer & Pople, 1975). The C11—H11···O6 intermolecular interaction connects dimers generating a graph set motif R22(24) (Fig 2).