organic compounds
2-Methyl-4-(naphthalen-2-yl)-3a-nitro-3,3a,4,9b-tetrahydro-2H-spiro[chromeno[3,4-c]pyrrole-1,3′-indolin]-2′-one
aCentre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600 025, India, and bDepartment of Organic Chemistry, University of Madras, Guindy Campus, Chennai 600 025, India
*Correspondence e-mail: shirai2011@gmail.com
In the title compound, C29H23N3O4, the 2-methylpyrrolidine ring adopts a twist conformation on the N—C bond involving the spiro C atom, while the hydropyran ring adopts an with the methine C atom bonded to the O atom as the flap. The mean plane of the indoline-2-one ring system is almost perpendicular to the mean plane of the pyrrolidine ring, making a dihedral angle of 89.73 (8)°. The latter ring makes dihedral angles of 47.80 (8) with the naphthalene ring system and 32.38 (8)° with the hydropyran ring mean plane. There is an intramolecular C-H⋯O hydrogen bond involving the indoline-2-one O atom. In the crystal, adjacent molecules are linked via N—H⋯O hydrogen bonds, forming chains propagating along [100]. The chains are linked via weak C—H⋯O hydrogen bonds, forming two-dimensional networks, lying parallel to (101), and consolidated by C—H⋯π interactions.
Related literature
For the biological importance of 4H-chromene derivatives, see: Cai (2007, 2008); Cai et al. (2006); Gabor (1988); Brooks (1998); Valenti et al. (1993); Hyana & Saimoto (1987); Tang et al. (2007). For applications of indoline-2-one and its derivatives as precursors in the synthesis of pharmaceuticals, see: Colgan et al. (1996).
Experimental
Crystal data
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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 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S160053681301533X/su2607sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681301533X/su2607Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S160053681301533X/su2607Isup3.cml
To a solution of isatin (1 equiv) and sarcosine (1.4 equiv) in dry toluene, was added 2-(naphthalen-1-yl)-3-nitro-2H-chromene (1 equiv) under a nitrogen atmosphere. The reaction mixture was refluxed for 24h in a Dean-Stark apparatus to give the cycloadducts. After completion of the reaction as indicated by TLC, the solvent was evaporated under reduced pressure. The crude product was extracted with dichloromethane. The organic layer was dried with anhydrous sodium sulphate and concentrated in vacuo. The crude product obtained was purified by
using hexane/EtOAc (7:3) as Single crystals suitable for X-ray diffraction were obtained by slow evaporation of a solution of the title compound in ethyl acetate at room temperature.The NH H atom was located in a difference Fourier map and refined with a distance restraint of N-H = 0.88 (1) Å with Uiso(H) = 1.2Ueq(N). The C-bound H atoms were placed in calculated positions and treated as riding atoms: C—H = 0.93 - 0.97 Å, with Uiso(H) = 1.5Ueq(C) for methyl H atoms and = 1.2Ueq(C) for other H atoms.
4H-chromenes are biologically important compounds used as synthetic ligands in the design of drugs and discovery processes. They exhibit numerous biological and pharmacological properties, such as anti-viral, anti-fungal, antiinflammatory, anti- diabetic, cardionthonic, anti anaphylactic and anti-cancer (Cai, 2008, 2007; Cai et al., 2006; Gabor, 1988; Brooks, 1998; Valenti et al., 1993; Hyana & Saimoto, 1987; Tang et al., 2007). Indoline-2-one and its derivatives have been used as precursors to synthesis pharmaceuticals (Colgan et al., 1996). Continuing our interest in such compounds we have synthesized the title compound and report herein on its crystal structure.
In the title compound, Fig. 1, the pyrrole ring (N2/C7/C8/C20/C21) adopts a twist conformation on bond C21-N2, while the pyran ring (O1/C1/C6-C9) adopts a
conformation with atom C9 as the flap. The pyrrole ring (N2/C7/C8/C20/C21) mean plane makes a dihedral angle of 89.73 (8)° with the mean plane of the indoline-2-one ring system (N3/C21-C28), which shows that they are almost orthogonal to each other. The same pyrrole ring mean plane makes dihedral angles of 47.80 (8) Å with the naphthalene ring system (C10-C19) and 32.38 (8)° with the pyran ring mean plane (O1/C1/C6-C9), and the oxygen atom O4 attached to the pyrrole ring deviates by -0.0886 (2) Å. The nitro group (N1/O2/O3) is inclined to the mean plane of the pyrrole ring, to which it is attached, with a dihedral angle of 50.76 (19) °.In the crystal, adjacent molecules are linked via N—H···O hydrogen bonds forming chains propagating along [100]; see Table 1 and Fig. 2. The chains are linked via weak C-H···O hydrogen bonds forming two-dimensional networks, lying parallel to (101), and consolidated by C-H···π interactions (Table 1).
For the biological importance of 4H-chromene derivatives, see: Cai (2007, 2008); Cai et al. (2006); Gabor (1988); Brooks (1998); Valenti et al. (1993); Hyana & Saimoto (1987); Tang et al. (2007). For applications of indoline-2-one and its derivatives as precursors in the synthesis of pharmaceuticals, see: Colgan et al. (1996).
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 for Windows (Farrugia, 2012); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title molecule, with atom labelling. Displacement ellipsoids are drawn at the 30% probability level. | |
Fig. 2. A partial view, ca. perpendicular to (110), of the crystal packing of the title compound. The hydrogen bonds are shown as dashed lines - see Table 1 for details; H-atoms not involved in hydrogen bonding have been omitted for clarity. |
C29H23N3O4 | F(000) = 1000 |
Mr = 477.50 | Dx = 1.348 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 5856 reflections |
a = 9.4359 (6) Å | θ = 1.8–28.3° |
b = 16.5086 (11) Å | µ = 0.09 mm−1 |
c = 15.1964 (10) Å | T = 293 K |
β = 96.363 (4)° | Block, colourless |
V = 2352.6 (3) Å3 | 0.30 × 0.25 × 0.20 mm |
Z = 4 |
Bruker SMART APEXII area-detector diffractometer | 5856 independent reflections |
Radiation source: fine-focus sealed tube | 3862 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.035 |
ω and φ scans | θmax = 28.3°, θmin = 1.8° |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | h = −12→12 |
Tmin = 0.973, Tmax = 0.982 | k = −22→22 |
22349 measured reflections | l = −14→20 |
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)] = 0.048 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.141 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0641P)2 + 0.4707P] where P = (Fo2 + 2Fc2)/3 |
5856 reflections | (Δ/σ)max < 0.001 |
329 parameters | Δρmax = 0.27 e Å−3 |
1 restraint | Δρmin = −0.18 e Å−3 |
C29H23N3O4 | V = 2352.6 (3) Å3 |
Mr = 477.50 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 9.4359 (6) Å | µ = 0.09 mm−1 |
b = 16.5086 (11) Å | T = 293 K |
c = 15.1964 (10) Å | 0.30 × 0.25 × 0.20 mm |
β = 96.363 (4)° |
Bruker SMART APEXII area-detector diffractometer | 5856 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 3862 reflections with I > 2σ(I) |
Tmin = 0.973, Tmax = 0.982 | Rint = 0.035 |
22349 measured reflections |
R[F2 > 2σ(F2)] = 0.048 | 1 restraint |
wR(F2) = 0.141 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.27 e Å−3 |
5856 reflections | Δρmin = −0.18 e Å−3 |
329 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 | 0.48112 (16) | 0.19305 (10) | 0.41572 (11) | 0.0398 (4) | |
C2 | 0.44179 (19) | 0.19055 (11) | 0.32492 (11) | 0.0499 (4) | |
H2 | 0.4791 | 0.2279 | 0.2879 | 0.060* | |
C3 | 0.3479 (2) | 0.13283 (12) | 0.29034 (13) | 0.0568 (5) | |
H3 | 0.3204 | 0.1314 | 0.2297 | 0.068* | |
C4 | 0.29370 (19) | 0.07669 (13) | 0.34465 (13) | 0.0587 (5) | |
H4 | 0.2300 | 0.0375 | 0.3206 | 0.070* | |
C5 | 0.33401 (17) | 0.07866 (12) | 0.43511 (12) | 0.0510 (4) | |
H5 | 0.2986 | 0.0399 | 0.4714 | 0.061* | |
C6 | 0.42704 (15) | 0.13804 (10) | 0.47241 (11) | 0.0389 (4) | |
C7 | 0.47639 (14) | 0.13939 (9) | 0.57035 (10) | 0.0344 (3) | |
H7 | 0.5304 | 0.0893 | 0.5836 | 0.041* | |
C8 | 0.57755 (15) | 0.21006 (9) | 0.59985 (10) | 0.0336 (3) | |
C9 | 0.56344 (17) | 0.28055 (9) | 0.53218 (10) | 0.0379 (3) | |
H9 | 0.4669 | 0.3027 | 0.5312 | 0.046* | |
C10 | 0.66706 (18) | 0.34982 (10) | 0.55074 (10) | 0.0436 (4) | |
C11 | 0.8044 (2) | 0.34132 (13) | 0.53052 (12) | 0.0574 (5) | |
H11 | 0.8309 | 0.2936 | 0.5042 | 0.069* | |
C12 | 0.9055 (3) | 0.40300 (18) | 0.54864 (15) | 0.0809 (7) | |
H12 | 0.9988 | 0.3955 | 0.5359 | 0.097* | |
C13 | 0.8670 (3) | 0.47382 (17) | 0.58491 (16) | 0.0879 (9) | |
H13 | 0.9349 | 0.5142 | 0.5974 | 0.105* | |
C14 | 0.7272 (3) | 0.48697 (12) | 0.60376 (13) | 0.0698 (6) | |
C15 | 0.6841 (5) | 0.56123 (15) | 0.64053 (17) | 0.0970 (10) | |
H15 | 0.7512 | 0.6020 | 0.6531 | 0.116* | |
C16 | 0.5499 (5) | 0.57387 (15) | 0.65736 (19) | 0.1058 (11) | |
H16 | 0.5250 | 0.6231 | 0.6813 | 0.127* | |
C17 | 0.4470 (4) | 0.51399 (14) | 0.63942 (16) | 0.0844 (8) | |
H17 | 0.3537 | 0.5237 | 0.6507 | 0.101* | |
C18 | 0.4821 (3) | 0.44085 (11) | 0.60523 (13) | 0.0609 (5) | |
H18 | 0.4123 | 0.4013 | 0.5940 | 0.073* | |
C19 | 0.6225 (2) | 0.42464 (10) | 0.58675 (11) | 0.0506 (4) | |
C20 | 0.54002 (18) | 0.23565 (10) | 0.69127 (11) | 0.0446 (4) | |
H20A | 0.6250 | 0.2399 | 0.7332 | 0.054* | |
H20B | 0.4906 | 0.2873 | 0.6883 | 0.054* | |
C21 | 0.36114 (16) | 0.14308 (9) | 0.63575 (11) | 0.0403 (4) | |
C22 | 0.28572 (16) | 0.06403 (10) | 0.64729 (11) | 0.0430 (4) | |
C23 | 0.33684 (19) | −0.00967 (11) | 0.67741 (14) | 0.0554 (5) | |
H23 | 0.4329 | −0.0164 | 0.6974 | 0.066* | |
C24 | 0.2425 (2) | −0.07411 (12) | 0.67744 (16) | 0.0686 (6) | |
H24 | 0.2756 | −0.1245 | 0.6980 | 0.082* | |
C25 | 0.1010 (2) | −0.06438 (13) | 0.64754 (17) | 0.0713 (6) | |
H25 | 0.0397 | −0.1085 | 0.6474 | 0.086* | |
C26 | 0.0477 (2) | 0.00972 (14) | 0.61763 (16) | 0.0665 (6) | |
H26 | −0.0482 | 0.0164 | 0.5973 | 0.080* | |
C27 | 0.14211 (17) | 0.07308 (11) | 0.61905 (13) | 0.0525 (5) | |
C28 | 0.23476 (18) | 0.19965 (12) | 0.60220 (14) | 0.0554 (5) | |
C29 | 0.3701 (3) | 0.19088 (14) | 0.79120 (15) | 0.0748 (7) | |
H29A | 0.3039 | 0.2339 | 0.7748 | 0.112* | |
H29B | 0.4366 | 0.2080 | 0.8401 | 0.112* | |
H29C | 0.3192 | 0.1441 | 0.8081 | 0.112* | |
N1 | 0.72963 (13) | 0.17834 (8) | 0.60492 (9) | 0.0404 (3) | |
N2 | 0.44715 (15) | 0.17065 (8) | 0.71623 (9) | 0.0451 (3) | |
N3 | 0.11545 (15) | 0.15370 (11) | 0.59269 (13) | 0.0669 (5) | |
H3A | 0.0310 (14) | 0.1754 (13) | 0.5819 (15) | 0.080* | |
O1 | 0.57898 (12) | 0.25128 (7) | 0.44517 (7) | 0.0437 (3) | |
O2 | 0.75903 (12) | 0.13501 (8) | 0.54490 (9) | 0.0585 (4) | |
O3 | 0.81715 (14) | 0.20033 (10) | 0.66412 (10) | 0.0701 (4) | |
O4 | 0.24095 (15) | 0.27211 (9) | 0.58777 (12) | 0.0780 (5) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0412 (8) | 0.0353 (8) | 0.0413 (9) | 0.0053 (7) | −0.0030 (6) | −0.0016 (7) |
C2 | 0.0618 (11) | 0.0434 (10) | 0.0418 (9) | 0.0090 (8) | −0.0057 (8) | 0.0012 (8) |
C3 | 0.0593 (11) | 0.0611 (12) | 0.0460 (10) | 0.0100 (10) | −0.0116 (8) | −0.0120 (9) |
C4 | 0.0464 (9) | 0.0657 (13) | 0.0619 (12) | −0.0070 (9) | −0.0040 (8) | −0.0248 (10) |
C5 | 0.0434 (8) | 0.0531 (11) | 0.0569 (11) | −0.0079 (8) | 0.0074 (8) | −0.0123 (9) |
C6 | 0.0338 (7) | 0.0381 (8) | 0.0441 (9) | 0.0032 (6) | 0.0006 (6) | −0.0069 (7) |
C7 | 0.0323 (7) | 0.0292 (7) | 0.0421 (8) | 0.0012 (6) | 0.0061 (6) | −0.0014 (6) |
C8 | 0.0342 (7) | 0.0323 (7) | 0.0347 (7) | −0.0004 (6) | 0.0050 (6) | −0.0010 (6) |
C9 | 0.0444 (8) | 0.0334 (8) | 0.0361 (8) | −0.0005 (6) | 0.0048 (6) | −0.0006 (6) |
C10 | 0.0598 (10) | 0.0374 (9) | 0.0333 (8) | −0.0099 (8) | 0.0039 (7) | 0.0049 (7) |
C11 | 0.0649 (11) | 0.0593 (12) | 0.0501 (10) | −0.0193 (9) | 0.0156 (9) | 0.0055 (9) |
C12 | 0.0780 (14) | 0.098 (2) | 0.0683 (14) | −0.0452 (14) | 0.0160 (11) | 0.0106 (14) |
C13 | 0.122 (2) | 0.0761 (17) | 0.0643 (14) | −0.0620 (17) | 0.0051 (14) | 0.0065 (13) |
C14 | 0.1206 (19) | 0.0442 (11) | 0.0417 (10) | −0.0297 (12) | −0.0040 (11) | 0.0094 (9) |
C15 | 0.182 (3) | 0.0418 (14) | 0.0624 (15) | −0.0313 (18) | −0.0059 (18) | −0.0028 (11) |
C16 | 0.209 (4) | 0.0352 (13) | 0.0693 (17) | 0.0116 (19) | −0.004 (2) | −0.0054 (11) |
C17 | 0.144 (2) | 0.0465 (13) | 0.0619 (14) | 0.0291 (14) | 0.0072 (14) | 0.0016 (11) |
C18 | 0.0948 (15) | 0.0369 (10) | 0.0502 (11) | 0.0115 (10) | 0.0044 (10) | 0.0026 (8) |
C19 | 0.0856 (13) | 0.0325 (9) | 0.0323 (8) | −0.0086 (9) | −0.0001 (8) | 0.0070 (7) |
C20 | 0.0548 (9) | 0.0393 (9) | 0.0418 (9) | −0.0063 (7) | 0.0141 (7) | −0.0039 (7) |
C21 | 0.0372 (7) | 0.0332 (8) | 0.0525 (10) | 0.0020 (6) | 0.0130 (7) | 0.0025 (7) |
C22 | 0.0388 (8) | 0.0383 (9) | 0.0543 (10) | −0.0007 (7) | 0.0160 (7) | 0.0016 (7) |
C23 | 0.0460 (9) | 0.0426 (10) | 0.0796 (13) | 0.0021 (8) | 0.0165 (9) | 0.0083 (9) |
C24 | 0.0641 (12) | 0.0389 (10) | 0.1073 (18) | −0.0027 (9) | 0.0289 (12) | 0.0067 (11) |
C25 | 0.0616 (12) | 0.0537 (13) | 0.1026 (18) | −0.0186 (10) | 0.0268 (12) | −0.0024 (12) |
C26 | 0.0435 (9) | 0.0698 (15) | 0.0872 (15) | −0.0114 (9) | 0.0115 (9) | 0.0063 (12) |
C27 | 0.0388 (8) | 0.0523 (11) | 0.0687 (12) | −0.0016 (8) | 0.0162 (8) | 0.0074 (9) |
C28 | 0.0435 (9) | 0.0467 (10) | 0.0795 (13) | 0.0098 (8) | 0.0225 (9) | 0.0116 (10) |
C29 | 0.0996 (16) | 0.0645 (13) | 0.0693 (13) | −0.0159 (12) | 0.0498 (12) | −0.0099 (11) |
N1 | 0.0365 (6) | 0.0426 (8) | 0.0416 (7) | −0.0025 (6) | 0.0017 (6) | 0.0047 (6) |
N2 | 0.0553 (8) | 0.0386 (8) | 0.0443 (8) | −0.0062 (6) | 0.0185 (6) | −0.0018 (6) |
N3 | 0.0339 (7) | 0.0602 (11) | 0.1080 (14) | 0.0085 (7) | 0.0141 (8) | 0.0250 (10) |
O1 | 0.0572 (7) | 0.0395 (6) | 0.0337 (6) | −0.0071 (5) | 0.0024 (5) | −0.0003 (5) |
O2 | 0.0446 (6) | 0.0695 (9) | 0.0625 (8) | 0.0110 (6) | 0.0109 (6) | −0.0121 (7) |
O3 | 0.0476 (7) | 0.0900 (11) | 0.0677 (9) | −0.0019 (7) | −0.0162 (6) | −0.0144 (8) |
O4 | 0.0572 (8) | 0.0453 (8) | 0.1352 (14) | 0.0152 (6) | 0.0277 (8) | 0.0235 (8) |
C1—O1 | 1.3731 (19) | C16—C17 | 1.391 (4) |
C1—C6 | 1.387 (2) | C16—H16 | 0.9300 |
C1—C2 | 1.389 (2) | C17—C18 | 1.369 (3) |
C2—C3 | 1.366 (3) | C17—H17 | 0.9300 |
C2—H2 | 0.9300 | C18—C19 | 1.410 (3) |
C3—C4 | 1.377 (3) | C18—H18 | 0.9300 |
C3—H3 | 0.9300 | C20—N2 | 1.462 (2) |
C4—C5 | 1.385 (3) | C20—H20A | 0.9700 |
C4—H4 | 0.9300 | C20—H20B | 0.9700 |
C5—C6 | 1.394 (2) | C21—N2 | 1.464 (2) |
C5—H5 | 0.9300 | C21—C22 | 1.506 (2) |
C6—C7 | 1.510 (2) | C21—C28 | 1.555 (2) |
C7—C8 | 1.542 (2) | C22—C23 | 1.369 (2) |
C7—C21 | 1.5535 (19) | C22—C27 | 1.383 (2) |
C7—H7 | 0.9800 | C23—C24 | 1.387 (3) |
C8—N1 | 1.5215 (19) | C23—H23 | 0.9300 |
C8—C20 | 1.531 (2) | C24—C25 | 1.371 (3) |
C8—C9 | 1.549 (2) | C24—H24 | 0.9300 |
C9—O1 | 1.4304 (18) | C25—C26 | 1.380 (3) |
C9—C10 | 1.511 (2) | C25—H25 | 0.9300 |
C9—H9 | 0.9800 | C26—C27 | 1.372 (3) |
C10—C11 | 1.371 (3) | C26—H26 | 0.9300 |
C10—C19 | 1.433 (2) | C27—N3 | 1.405 (2) |
C11—C12 | 1.402 (3) | C28—O4 | 1.219 (2) |
C11—H11 | 0.9300 | C28—N3 | 1.352 (2) |
C12—C13 | 1.359 (4) | C29—N2 | 1.456 (2) |
C12—H12 | 0.9300 | C29—H29A | 0.9600 |
C13—C14 | 1.398 (4) | C29—H29B | 0.9600 |
C13—H13 | 0.9300 | C29—H29C | 0.9600 |
C14—C15 | 1.425 (4) | N1—O3 | 1.2077 (18) |
C14—C19 | 1.430 (3) | N1—O2 | 1.2151 (17) |
C15—C16 | 1.336 (5) | N3—H3A | 0.872 (9) |
C15—H15 | 0.9300 | ||
O1—C1—C6 | 122.43 (14) | C18—C17—H17 | 119.7 |
O1—C1—C2 | 116.13 (15) | C16—C17—H17 | 119.7 |
C6—C1—C2 | 121.41 (15) | C17—C18—C19 | 121.0 (2) |
C3—C2—C1 | 119.56 (18) | C17—C18—H18 | 119.5 |
C3—C2—H2 | 120.2 | C19—C18—H18 | 119.5 |
C1—C2—H2 | 120.2 | C18—C19—C14 | 118.22 (19) |
C2—C3—C4 | 120.48 (17) | C18—C19—C10 | 124.17 (17) |
C2—C3—H3 | 119.8 | C14—C19—C10 | 117.60 (19) |
C4—C3—H3 | 119.8 | N2—C20—C8 | 103.81 (12) |
C3—C4—C5 | 119.97 (17) | N2—C20—H20A | 111.0 |
C3—C4—H4 | 120.0 | C8—C20—H20A | 111.0 |
C5—C4—H4 | 120.0 | N2—C20—H20B | 111.0 |
C4—C5—C6 | 120.76 (18) | C8—C20—H20B | 111.0 |
C4—C5—H5 | 119.6 | H20A—C20—H20B | 109.0 |
C6—C5—H5 | 119.6 | N2—C21—C22 | 113.42 (14) |
C1—C6—C5 | 117.79 (15) | N2—C21—C7 | 100.61 (12) |
C1—C6—C7 | 120.54 (13) | C22—C21—C7 | 114.45 (13) |
C5—C6—C7 | 121.53 (15) | N2—C21—C28 | 114.91 (14) |
C6—C7—C8 | 114.27 (12) | C22—C21—C28 | 101.74 (13) |
C6—C7—C21 | 118.03 (12) | C7—C21—C28 | 112.30 (13) |
C8—C7—C21 | 103.83 (12) | C23—C22—C27 | 119.77 (16) |
C6—C7—H7 | 106.7 | C23—C22—C21 | 130.97 (15) |
C8—C7—H7 | 106.7 | C27—C22—C21 | 109.24 (15) |
C21—C7—H7 | 106.7 | C22—C23—C24 | 118.64 (18) |
N1—C8—C20 | 111.16 (12) | C22—C23—H23 | 120.7 |
N1—C8—C7 | 107.71 (12) | C24—C23—H23 | 120.7 |
C20—C8—C7 | 105.94 (11) | C25—C24—C23 | 120.8 (2) |
N1—C8—C9 | 107.66 (11) | C25—C24—H24 | 119.6 |
C20—C8—C9 | 112.57 (12) | C23—C24—H24 | 119.6 |
C7—C8—C9 | 111.74 (12) | C24—C25—C26 | 121.22 (19) |
O1—C9—C10 | 107.32 (12) | C24—C25—H25 | 119.4 |
O1—C9—C8 | 110.48 (12) | C26—C25—H25 | 119.4 |
C10—C9—C8 | 116.01 (13) | C27—C26—C25 | 117.29 (18) |
O1—C9—H9 | 107.6 | C27—C26—H26 | 121.4 |
C10—C9—H9 | 107.6 | C25—C26—H26 | 121.4 |
C8—C9—H9 | 107.6 | C26—C27—C22 | 122.29 (18) |
C11—C10—C19 | 119.88 (16) | C26—C27—N3 | 128.49 (17) |
C11—C10—C9 | 119.25 (16) | C22—C27—N3 | 109.22 (15) |
C19—C10—C9 | 120.85 (15) | O4—C28—N3 | 125.97 (17) |
C10—C11—C12 | 121.4 (2) | O4—C28—C21 | 126.73 (16) |
C10—C11—H11 | 119.3 | N3—C28—C21 | 107.29 (15) |
C12—C11—H11 | 119.3 | N2—C29—H29A | 109.5 |
C13—C12—C11 | 119.8 (2) | N2—C29—H29B | 109.5 |
C13—C12—H12 | 120.1 | H29A—C29—H29B | 109.5 |
C11—C12—H12 | 120.1 | N2—C29—H29C | 109.5 |
C12—C13—C14 | 121.2 (2) | H29A—C29—H29C | 109.5 |
C12—C13—H13 | 119.4 | H29B—C29—H29C | 109.5 |
C14—C13—H13 | 119.4 | O3—N1—O2 | 122.82 (14) |
C13—C14—C15 | 122.1 (2) | O3—N1—C8 | 119.83 (14) |
C13—C14—C19 | 120.0 (2) | O2—N1—C8 | 117.20 (13) |
C15—C14—C19 | 117.9 (3) | C29—N2—C20 | 113.58 (14) |
C16—C15—C14 | 121.8 (3) | C29—N2—C21 | 116.52 (15) |
C16—C15—H15 | 119.1 | C20—N2—C21 | 107.71 (12) |
C14—C15—H15 | 119.1 | C28—N3—C27 | 112.36 (15) |
C15—C16—C17 | 120.5 (3) | C28—N3—H3A | 121.5 (15) |
C15—C16—H16 | 119.8 | C27—N3—H3A | 125.0 (15) |
C17—C16—H16 | 119.8 | C1—O1—C9 | 113.80 (12) |
C18—C17—C16 | 120.6 (3) | ||
O1—C1—C2—C3 | 178.19 (15) | C7—C8—C20—N2 | 11.54 (16) |
C6—C1—C2—C3 | 0.0 (2) | C9—C8—C20—N2 | 133.94 (13) |
C1—C2—C3—C4 | −0.8 (3) | C6—C7—C21—N2 | −161.75 (13) |
C2—C3—C4—C5 | 0.2 (3) | C8—C7—C21—N2 | −34.11 (14) |
C3—C4—C5—C6 | 1.3 (3) | C6—C7—C21—C22 | 76.29 (18) |
O1—C1—C6—C5 | −176.63 (14) | C8—C7—C21—C22 | −156.07 (13) |
C2—C1—C6—C5 | 1.5 (2) | C6—C7—C21—C28 | −39.06 (19) |
O1—C1—C6—C7 | −0.9 (2) | C8—C7—C21—C28 | 88.58 (16) |
C2—C1—C6—C7 | 177.16 (14) | N2—C21—C22—C23 | −54.1 (2) |
C4—C5—C6—C1 | −2.1 (2) | C7—C21—C22—C23 | 60.5 (3) |
C4—C5—C6—C7 | −177.75 (15) | C28—C21—C22—C23 | −178.11 (19) |
C1—C6—C7—C8 | 5.17 (19) | N2—C21—C22—C27 | 127.56 (15) |
C5—C6—C7—C8 | −179.29 (14) | C7—C21—C22—C27 | −117.77 (16) |
C1—C6—C7—C21 | 127.66 (15) | C28—C21—C22—C27 | 3.58 (18) |
C5—C6—C7—C21 | −56.8 (2) | C27—C22—C23—C24 | 1.0 (3) |
C6—C7—C8—N1 | −97.00 (14) | C21—C22—C23—C24 | −177.17 (18) |
C21—C7—C8—N1 | 133.06 (12) | C22—C23—C24—C25 | 0.3 (3) |
C6—C7—C8—C20 | 143.98 (13) | C23—C24—C25—C26 | −0.8 (4) |
C21—C7—C8—C20 | 14.04 (15) | C24—C25—C26—C27 | 0.0 (3) |
C6—C7—C8—C9 | 21.05 (16) | C25—C26—C27—C22 | 1.3 (3) |
C21—C7—C8—C9 | −108.89 (13) | C25—C26—C27—N3 | −179.9 (2) |
N1—C8—C9—O1 | 65.62 (15) | C23—C22—C27—C26 | −1.9 (3) |
C20—C8—C9—O1 | −171.52 (12) | C21—C22—C27—C26 | 176.67 (18) |
C7—C8—C9—O1 | −52.45 (15) | C23—C22—C27—N3 | 179.16 (17) |
N1—C8—C9—C10 | −56.78 (16) | C21—C22—C27—N3 | −2.3 (2) |
C20—C8—C9—C10 | 66.07 (17) | N2—C21—C28—O4 | 52.8 (3) |
C7—C8—C9—C10 | −174.86 (12) | C22—C21—C28—O4 | 175.7 (2) |
O1—C9—C10—C11 | −45.55 (19) | C7—C21—C28—O4 | −61.4 (3) |
C8—C9—C10—C11 | 78.51 (18) | N2—C21—C28—N3 | −126.64 (16) |
O1—C9—C10—C19 | 132.72 (15) | C22—C21—C28—N3 | −3.67 (19) |
C8—C9—C10—C19 | −103.22 (17) | C7—C21—C28—N3 | 119.16 (17) |
C19—C10—C11—C12 | 3.4 (3) | C20—C8—N1—O3 | −25.4 (2) |
C9—C10—C11—C12 | −178.27 (17) | C7—C8—N1—O3 | −141.06 (15) |
C10—C11—C12—C13 | −1.7 (3) | C9—C8—N1—O3 | 98.29 (16) |
C11—C12—C13—C14 | −0.7 (4) | C20—C8—N1—O2 | 158.88 (14) |
C12—C13—C14—C15 | −179.0 (2) | C7—C8—N1—O2 | 43.25 (17) |
C12—C13—C14—C19 | 1.4 (3) | C9—C8—N1—O2 | −77.40 (17) |
C13—C14—C15—C16 | 179.1 (3) | C8—C20—N2—C29 | −165.99 (17) |
C19—C14—C15—C16 | −1.3 (4) | C8—C20—N2—C21 | −35.37 (16) |
C14—C15—C16—C17 | 0.1 (4) | C22—C21—N2—C29 | −64.53 (19) |
C15—C16—C17—C18 | 0.8 (4) | C7—C21—N2—C29 | 172.78 (15) |
C16—C17—C18—C19 | −0.5 (3) | C28—C21—N2—C29 | 51.9 (2) |
C17—C18—C19—C14 | −0.7 (3) | C22—C21—N2—C20 | 166.51 (12) |
C17—C18—C19—C10 | −179.78 (18) | C7—C21—N2—C20 | 43.82 (15) |
C13—C14—C19—C18 | −178.90 (19) | C28—C21—N2—C20 | −77.02 (16) |
C15—C14—C19—C18 | 1.5 (3) | O4—C28—N3—C27 | −176.8 (2) |
C13—C14—C19—C10 | 0.3 (3) | C21—C28—N3—C27 | 2.6 (2) |
C15—C14—C19—C10 | −179.30 (17) | C26—C27—N3—C28 | −179.2 (2) |
C11—C10—C19—C18 | 176.46 (17) | C22—C27—N3—C28 | −0.2 (2) |
C9—C10—C19—C18 | −1.8 (2) | C6—C1—O1—C9 | −32.43 (19) |
C11—C10—C19—C14 | −2.7 (2) | C2—C1—O1—C9 | 149.38 (14) |
C9—C10—C19—C14 | 179.08 (15) | C10—C9—O1—C1 | −173.96 (13) |
N1—C8—C20—N2 | −105.18 (14) | C8—C9—O1—C1 | 58.67 (16) |
Cg1 is the centroid of the C10–C14/C19 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9···O4 | 0.98 | 2.44 | 3.250 (2) | 140 |
N3—H3A···O3i | 0.87 (2) | 2.52 (2) | 3.220 (2) | 138 (2) |
C2—H2···O3ii | 0.93 | 2.58 | 3.156 (2) | 121 |
C3—H3···Cg1ii | 0.93 | 2.57 | 3.473 (2) | 164 |
Symmetry codes: (i) x−1, y, z; (ii) x−1/2, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C29H23N3O4 |
Mr | 477.50 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 293 |
a, b, c (Å) | 9.4359 (6), 16.5086 (11), 15.1964 (10) |
β (°) | 96.363 (4) |
V (Å3) | 2352.6 (3) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART APEXII area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.973, 0.982 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 22349, 5856, 3862 |
Rint | 0.035 |
(sin θ/λ)max (Å−1) | 0.668 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.048, 0.141, 1.03 |
No. of reflections | 5856 |
No. of parameters | 329 |
No. of restraints | 1 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.27, −0.18 |
Computer programs: APEX2 (Bruker, 2008), SAINT (Bruker, 2008), SHELXS97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 2012), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
Cg1 is the centroid of the C10–C14/C19 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
C9—H9···O4 | 0.98 | 2.44 | 3.250 (2) | 140 |
N3—H3A···O3i | 0.873 (16) | 2.522 (16) | 3.220 (2) | 137.6 (19) |
C2—H2···O3ii | 0.93 | 2.58 | 3.156 (2) | 121 |
C3—H3···Cg1ii | 0.93 | 2.57 | 3.473 (2) | 164 |
Symmetry codes: (i) x−1, y, z; (ii) x−1/2, −y+1/2, z−1/2. |
Acknowledgements
The authors thank the TBI X-ray facility, CAS in Crystallography and Biophysics, University of Madras, India, for the data collection. SK, TS and DV thank the UGC (SAP–CAS) for the departmental facilities. SK also thanks DST PURSE for a Junior Research Fellowship and TS also thanks DST Inspire for a fellowship.
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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.
4H-chromenes are biologically important compounds used as synthetic ligands in the design of drugs and discovery processes. They exhibit numerous biological and pharmacological properties, such as anti-viral, anti-fungal, antiinflammatory, anti- diabetic, cardionthonic, anti anaphylactic and anti-cancer (Cai, 2008, 2007; Cai et al., 2006; Gabor, 1988; Brooks, 1998; Valenti et al., 1993; Hyana & Saimoto, 1987; Tang et al., 2007). Indoline-2-one and its derivatives have been used as precursors to synthesis pharmaceuticals (Colgan et al., 1996). Continuing our interest in such compounds we have synthesized the title compound and report herein on its crystal structure.
In the title compound, Fig. 1, the pyrrole ring (N2/C7/C8/C20/C21) adopts a twist conformation on bond C21-N2, while the pyran ring (O1/C1/C6-C9) adopts a envelope conformation with atom C9 as the flap. The pyrrole ring (N2/C7/C8/C20/C21) mean plane makes a dihedral angle of 89.73 (8)° with the mean plane of the indoline-2-one ring system (N3/C21-C28), which shows that they are almost orthogonal to each other. The same pyrrole ring mean plane makes dihedral angles of 47.80 (8) Å with the naphthalene ring system (C10-C19) and 32.38 (8)° with the pyran ring mean plane (O1/C1/C6-C9), and the oxygen atom O4 attached to the pyrrole ring deviates by -0.0886 (2) Å. The nitro group (N1/O2/O3) is inclined to the mean plane of the pyrrole ring, to which it is attached, with a dihedral angle of 50.76 (19) °.
In the crystal, adjacent molecules are linked via N—H···O hydrogen bonds forming chains propagating along [100]; see Table 1 and Fig. 2. The chains are linked via weak C-H···O hydrogen bonds forming two-dimensional networks, lying parallel to (101), and consolidated by C-H···π interactions (Table 1).