organic compounds
1-Allyl-3-benzyl-1H-benzimidazol-2(3H)-one
aLaboratoire de Chimie Organique Appliquée, Université Sidi Mohamed Ben Abdallah, Faculté des Sciences et Techniques, Route d'Immouzzer, BP 2202 Fès, Morocco, bUnité de Catalyse et de Chimie du Solide (UCCS), UMR 8181, Ecole Nationale Supérieure de Chimie de Lille, France, cUSR 3290 Miniaturisation pour l'Analyse, la Synthèse et la Protéomique, 59655 Villeneuve d'Ascq Cedex, Université Lille 1, France, dLaboratoire de Chimie Organique Hétérocyclique, URAC 21, Pôle de Compétences Pharmacochimie, Université Mohammed V-Agdal, BP 1014 Avenue, Ibn Batouta, Rabat, Morocco, and eLaboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco
*Correspondence e-mail: amal_haoudi@yahoo.fr
In the title compound, C17H16N2O, the fused benzimidazol-2(3H)-one system is essentially planar, the largest deviation from the mean plane being 0.006 (2) Å for the carbonyl C atom. Its mean plane is almost perpendicular to the benzyl plane and to the allyl group, making dihedral angles of 80.6 (1) and 77.4 (3)°, respectively. The benzyl group and the allyl subsituent lie on opposite sides of the fused ring system. In the crystal, molecules are linked by bifurcated C—H⋯O hydrogen bonds in which the carbonyl O atom acts as accepter to two aromatic C—H groups, forming a two-dimensional network parallel to (001).
Related literature
For the biological activity of benzimidazole derivatives, see: Gravatt et al. (1994); Soderlind et al. (1999); Bouwman et al. (1990) and for potential applications in the treatment of some diseases, see: Zhu et al. (2008); Ogino et al. (2008); Shah et al. (2008). For their use as intermediates in chemical synthesis, see: Bai et al. (2001). For similar compounds, see: Belaziz et al. (2012, 2013).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2009); cell SAINT-Plus (Bruker, 2009); data reduction: SAINT-Plus; 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: PLATON (Spek, 2009) and publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536813023568/im2438sup1.cif
contains datablock I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536813023568/im2438Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536813023568/im2438Isup3.cml
To 1H-benzo[d]imidazol-2(3H)-one (0.2 g, 1.49 mmol), potassium carbonate (0.41 g, 2.98 mmol) and tetra-n-butylammonium bromide (0.05 g, 0.15 mmol) in DMF (20 ml) was added benzylchloride (0.22 g, 1.79 mmol). Stirring was continued at room temperature for 6 h. The resulting salt was removed by filtration and the filtrate concentrated under reduced pressure. The residue was separated by
on a column of silica gel with ethyl acetate/hexane (1/2) as The compound was recrystallized from ethanol to give colorless crystals. To the compound obtained (1-benzyl-benzimidazol-2-one (0.15 g, 0.67 mmol) was added allylbromide (0.10 g, 0.87 mmol) in DMF (10 ml), and potassium carbonate (0.18 g, 1.33 mmol) and tetra-n-butylammonium bromide (0.02 g, 0.07 mmol). Stirring was continued at room temperature for 12 h. The formed salt was removed by filtration and the filtrate concentrated under reduced pressure. The residue was separated by on a column of silica gel with ethyl acetate/hexane (1/1) as (yield 82%, based on the intermediate). The title compound was recrystallized from dichloromethane/hexane to give colourless crystals.All H atoms could be located in a difference Fourier map. However, they were placed in calculated positions with C—H = 0.93 Å (aromatic, olefinic), and C—H = 0.97 Å (methylene) and refined as riding on their parent atoms with Uiso(H) = 1.2 Ueq (C).
Data collection: APEX2 (Bruker, 2009); cell
SAINT-Plus (Bruker, 2009); data reduction: SAINT-Plus (Bruker, 2009); 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: PLATON (Spek, 2009) and publCIF (Westrip, 2010).C17H16N2O | Z = 2 |
Mr = 264.32 | F(000) = 280 |
Triclinic, P1 | Dx = 1.242 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 9.0667 (2) Å | Cell parameters from 3494 reflections |
b = 9.3922 (2) Å | θ = 2.3–28.3° |
c = 9.6486 (2) Å | µ = 0.08 mm−1 |
α = 94.218 (1)° | T = 296 K |
β = 113.543 (1)° | Irregular shape, colourless |
γ = 106.265 (1)° | 0.43 × 0.20 × 0.16 mm |
V = 706.87 (3) Å3 |
Bruker APEXII CCD diffractometer | 3494 independent reflections |
Radiation source: microfocus source | 2573 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.021 |
ϕ and ω scans | θmax = 28.3°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −12→12 |
Tmin = 0.967, Tmax = 0.988 | k = −12→12 |
12670 measured reflections | l = −12→12 |
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)] = 0.047 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.141 | H-atom parameters constrained |
S = 1.06 | w = 1/[σ2(Fo2) + (0.0617P)2 + 0.1232P] where P = (Fo2 + 2Fc2)/3 |
3494 reflections | (Δ/σ)max < 0.001 |
181 parameters | Δρmax = 0.18 e Å−3 |
0 restraints | Δρmin = −0.15 e Å−3 |
C17H16N2O | γ = 106.265 (1)° |
Mr = 264.32 | V = 706.87 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.0667 (2) Å | Mo Kα radiation |
b = 9.3922 (2) Å | µ = 0.08 mm−1 |
c = 9.6486 (2) Å | T = 296 K |
α = 94.218 (1)° | 0.43 × 0.20 × 0.16 mm |
β = 113.543 (1)° |
Bruker APEXII CCD diffractometer | 3494 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 2573 reflections with I > 2σ(I) |
Tmin = 0.967, Tmax = 0.988 | Rint = 0.021 |
12670 measured reflections |
R[F2 > 2σ(F2)] = 0.047 | 0 restraints |
wR(F2) = 0.141 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.18 e Å−3 |
3494 reflections | Δρmin = −0.15 e Å−3 |
181 parameters |
Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 | 0.08458 (17) | 0.53012 (15) | 0.75007 (15) | 0.0503 (3) | |
C2 | −0.0580 (2) | 0.4975 (2) | 0.77755 (18) | 0.0652 (4) | |
H2 | −0.0800 | 0.4235 | 0.8325 | 0.078* | |
C3 | −0.1663 (2) | 0.5780 (2) | 0.7211 (2) | 0.0785 (5) | |
H3 | −0.2638 | 0.5575 | 0.7376 | 0.094* | |
C4 | −0.1336 (2) | 0.6887 (2) | 0.6404 (2) | 0.0778 (5) | |
H4 | −0.2098 | 0.7410 | 0.6034 | 0.093* | |
C5 | 0.0111 (2) | 0.72378 (18) | 0.61297 (19) | 0.0636 (4) | |
H5 | 0.0338 | 0.7989 | 0.5594 | 0.076* | |
C6 | 0.11833 (17) | 0.64210 (14) | 0.66878 (15) | 0.0484 (3) | |
C7 | 0.33127 (18) | 0.54248 (15) | 0.73733 (17) | 0.0524 (3) | |
C8 | 0.2415 (2) | 0.35712 (18) | 0.88407 (19) | 0.0710 (5) | |
H8A | 0.2268 | 0.3845 | 0.9755 | 0.085* | |
H8B | 0.3582 | 0.3588 | 0.9181 | 0.085* | |
C9 | 0.1241 (3) | 0.20112 (19) | 0.8030 (2) | 0.0777 (5) | |
H9 | 0.1257 | 0.1609 | 0.7128 | 0.093* | |
C10 | 0.0209 (3) | 0.1174 (3) | 0.8466 (4) | 0.1171 (9) | |
H10A | 0.0154 | 0.1535 | 0.9362 | 0.141* | |
H10B | −0.0490 | 0.0201 | 0.7889 | 0.141* | |
C11 | 0.3572 (2) | 0.74859 (15) | 0.59174 (18) | 0.0576 (4) | |
H11A | 0.2751 | 0.7508 | 0.4904 | 0.069* | |
H11B | 0.4401 | 0.7099 | 0.5778 | 0.069* | |
C12 | 0.44798 (18) | 0.90823 (15) | 0.68814 (16) | 0.0507 (3) | |
C13 | 0.4105 (2) | 1.02876 (17) | 0.6275 (2) | 0.0635 (4) | |
H13 | 0.3285 | 1.0118 | 0.5261 | 0.076* | |
C14 | 0.4935 (3) | 1.17505 (18) | 0.7159 (3) | 0.0762 (5) | |
H14 | 0.4671 | 1.2557 | 0.6738 | 0.091* | |
C15 | 0.6135 (3) | 1.2009 (2) | 0.8642 (3) | 0.0798 (6) | |
H15 | 0.6686 | 1.2991 | 0.9236 | 0.096* | |
C16 | 0.6534 (3) | 1.0830 (2) | 0.9259 (2) | 0.0854 (6) | |
H16 | 0.7360 | 1.1011 | 1.0273 | 0.102* | |
C17 | 0.5712 (2) | 0.93636 (19) | 0.8379 (2) | 0.0709 (5) | |
H17 | 0.5994 | 0.8565 | 0.8803 | 0.085* | |
N1 | 0.21567 (15) | 0.47062 (13) | 0.79022 (14) | 0.0546 (3) | |
N2 | 0.26911 (15) | 0.64676 (12) | 0.66155 (14) | 0.0504 (3) | |
O1 | 0.46264 (14) | 0.51931 (12) | 0.75495 (15) | 0.0703 (3) |
U11 | U22 | U33 | U12 | U13 | U23 | |
C1 | 0.0468 (7) | 0.0456 (7) | 0.0449 (7) | 0.0041 (6) | 0.0168 (6) | −0.0037 (5) |
C2 | 0.0565 (9) | 0.0695 (10) | 0.0581 (9) | 0.0033 (7) | 0.0286 (7) | −0.0032 (7) |
C3 | 0.0530 (9) | 0.0892 (13) | 0.0808 (12) | 0.0110 (9) | 0.0317 (9) | −0.0143 (10) |
C4 | 0.0553 (10) | 0.0799 (12) | 0.0836 (12) | 0.0281 (9) | 0.0168 (9) | −0.0067 (10) |
C5 | 0.0600 (9) | 0.0563 (9) | 0.0633 (9) | 0.0209 (7) | 0.0168 (7) | 0.0043 (7) |
C6 | 0.0462 (7) | 0.0418 (6) | 0.0467 (7) | 0.0087 (5) | 0.0164 (6) | −0.0024 (5) |
C7 | 0.0488 (8) | 0.0387 (6) | 0.0586 (8) | 0.0074 (6) | 0.0193 (6) | 0.0016 (6) |
C8 | 0.0755 (11) | 0.0578 (9) | 0.0593 (9) | 0.0110 (8) | 0.0165 (8) | 0.0192 (7) |
C9 | 0.0935 (13) | 0.0534 (9) | 0.0736 (11) | 0.0171 (9) | 0.0287 (10) | 0.0196 (8) |
C10 | 0.120 (2) | 0.0697 (13) | 0.162 (2) | 0.0150 (13) | 0.0698 (18) | 0.0428 (15) |
C11 | 0.0682 (9) | 0.0451 (7) | 0.0594 (8) | 0.0098 (7) | 0.0352 (7) | 0.0057 (6) |
C12 | 0.0544 (8) | 0.0424 (7) | 0.0567 (8) | 0.0078 (6) | 0.0322 (7) | 0.0066 (6) |
C13 | 0.0704 (10) | 0.0526 (8) | 0.0670 (9) | 0.0180 (7) | 0.0316 (8) | 0.0126 (7) |
C14 | 0.0904 (13) | 0.0455 (8) | 0.1024 (15) | 0.0198 (8) | 0.0541 (12) | 0.0139 (9) |
C15 | 0.0848 (13) | 0.0490 (9) | 0.0948 (14) | −0.0039 (8) | 0.0512 (11) | −0.0105 (9) |
C16 | 0.0789 (12) | 0.0732 (12) | 0.0676 (11) | −0.0026 (9) | 0.0191 (9) | −0.0043 (9) |
C17 | 0.0726 (11) | 0.0556 (9) | 0.0693 (10) | 0.0109 (8) | 0.0237 (9) | 0.0128 (8) |
N1 | 0.0539 (7) | 0.0447 (6) | 0.0559 (7) | 0.0095 (5) | 0.0199 (5) | 0.0109 (5) |
N2 | 0.0508 (6) | 0.0381 (5) | 0.0604 (7) | 0.0103 (5) | 0.0262 (5) | 0.0074 (5) |
O1 | 0.0533 (6) | 0.0580 (6) | 0.0960 (9) | 0.0210 (5) | 0.0287 (6) | 0.0116 (6) |
C1—C2 | 1.378 (2) | C9—C10 | 1.274 (3) |
C1—N1 | 1.3824 (19) | C9—H9 | 0.9300 |
C1—C6 | 1.396 (2) | C10—H10A | 0.9300 |
C2—C3 | 1.371 (3) | C10—H10B | 0.9300 |
C2—H2 | 0.9300 | C11—N2 | 1.4503 (18) |
C3—C4 | 1.381 (3) | C11—C12 | 1.5109 (19) |
C3—H3 | 0.9300 | C11—H11A | 0.9700 |
C4—C5 | 1.396 (3) | C11—H11B | 0.9700 |
C4—H4 | 0.9300 | C12—C13 | 1.376 (2) |
C5—C6 | 1.373 (2) | C12—C17 | 1.377 (2) |
C5—H5 | 0.9300 | C13—C14 | 1.385 (2) |
C6—N2 | 1.3853 (18) | C13—H13 | 0.9300 |
C7—O1 | 1.2181 (17) | C14—C15 | 1.359 (3) |
C7—N1 | 1.3771 (19) | C14—H14 | 0.9300 |
C7—N2 | 1.3773 (18) | C15—C16 | 1.364 (3) |
C8—N1 | 1.4572 (19) | C15—H15 | 0.9300 |
C8—C9 | 1.478 (2) | C16—C17 | 1.386 (2) |
C8—H8A | 0.9700 | C16—H16 | 0.9300 |
C8—H8B | 0.9700 | C17—H17 | 0.9300 |
C2—C1—N1 | 131.78 (15) | H10A—C10—H10B | 120.0 |
C2—C1—C6 | 121.12 (15) | N2—C11—C12 | 112.61 (11) |
N1—C1—C6 | 107.10 (12) | N2—C11—H11A | 109.1 |
C3—C2—C1 | 117.73 (17) | C12—C11—H11A | 109.1 |
C3—C2—H2 | 121.1 | N2—C11—H11B | 109.1 |
C1—C2—H2 | 121.1 | C12—C11—H11B | 109.1 |
C2—C3—C4 | 121.36 (17) | H11A—C11—H11B | 107.8 |
C2—C3—H3 | 119.3 | C13—C12—C17 | 118.60 (14) |
C4—C3—H3 | 119.3 | C13—C12—C11 | 120.70 (14) |
C3—C4—C5 | 121.50 (17) | C17—C12—C11 | 120.70 (14) |
C3—C4—H4 | 119.2 | C12—C13—C14 | 120.70 (17) |
C5—C4—H4 | 119.2 | C12—C13—H13 | 119.6 |
C6—C5—C4 | 116.84 (17) | C14—C13—H13 | 119.6 |
C6—C5—H5 | 121.6 | C15—C14—C13 | 120.04 (17) |
C4—C5—H5 | 121.6 | C15—C14—H14 | 120.0 |
C5—C6—N2 | 131.80 (14) | C13—C14—H14 | 120.0 |
C5—C6—C1 | 121.45 (14) | C14—C15—C16 | 120.13 (16) |
N2—C6—C1 | 106.75 (12) | C14—C15—H15 | 119.9 |
O1—C7—N1 | 126.96 (14) | C16—C15—H15 | 119.9 |
O1—C7—N2 | 126.92 (14) | C15—C16—C17 | 120.12 (18) |
N1—C7—N2 | 106.13 (12) | C15—C16—H16 | 119.9 |
N1—C8—C9 | 114.03 (14) | C17—C16—H16 | 119.9 |
N1—C8—H8A | 108.7 | C12—C17—C16 | 120.40 (17) |
C9—C8—H8A | 108.7 | C12—C17—H17 | 119.8 |
N1—C8—H8B | 108.7 | C16—C17—H17 | 119.8 |
C9—C8—H8B | 108.7 | C7—N1—C1 | 109.97 (12) |
H8A—C8—H8B | 107.6 | C7—N1—C8 | 122.70 (14) |
C10—C9—C8 | 125.3 (2) | C1—N1—C8 | 127.18 (14) |
C10—C9—H9 | 117.4 | C7—N2—C6 | 110.04 (12) |
C8—C9—H9 | 117.4 | C7—N2—C11 | 123.15 (12) |
C9—C10—H10A | 120.0 | C6—N2—C11 | 126.76 (12) |
C9—C10—H10B | 120.0 | ||
N1—C1—C2—C3 | −179.88 (14) | C15—C16—C17—C12 | −0.5 (3) |
C6—C1—C2—C3 | 0.6 (2) | O1—C7—N1—C1 | 178.76 (14) |
C1—C2—C3—C4 | −0.4 (2) | N2—C7—N1—C1 | −0.76 (15) |
C2—C3—C4—C5 | −0.1 (3) | O1—C7—N1—C8 | 2.9 (2) |
C3—C4—C5—C6 | 0.6 (2) | N2—C7—N1—C8 | −176.64 (12) |
C4—C5—C6—N2 | 179.56 (14) | C2—C1—N1—C7 | −179.26 (14) |
C4—C5—C6—C1 | −0.5 (2) | C6—C1—N1—C7 | 0.34 (15) |
C2—C1—C6—C5 | −0.1 (2) | C2—C1—N1—C8 | −3.6 (2) |
N1—C1—C6—C5 | −179.75 (12) | C6—C1—N1—C8 | 175.99 (13) |
C2—C1—C6—N2 | 179.87 (12) | C9—C8—N1—C7 | −109.85 (18) |
N1—C1—C6—N2 | 0.22 (14) | C9—C8—N1—C1 | 75.0 (2) |
N1—C8—C9—C10 | −121.4 (2) | O1—C7—N2—C6 | −178.62 (14) |
N2—C11—C12—C13 | −122.16 (15) | N1—C7—N2—C6 | 0.90 (15) |
N2—C11—C12—C17 | 58.5 (2) | O1—C7—N2—C11 | −1.0 (2) |
C17—C12—C13—C14 | −0.7 (2) | N1—C7—N2—C11 | 178.55 (11) |
C11—C12—C13—C14 | 179.94 (15) | C5—C6—N2—C7 | 179.26 (14) |
C12—C13—C14—C15 | 0.0 (3) | C1—C6—N2—C7 | −0.70 (14) |
C13—C14—C15—C16 | 0.5 (3) | C5—C6—N2—C11 | 1.7 (2) |
C14—C15—C16—C17 | −0.3 (3) | C1—C6—N2—C11 | −178.24 (12) |
C13—C12—C17—C16 | 0.9 (3) | C12—C11—N2—C7 | −102.99 (15) |
C11—C12—C17—C16 | −179.72 (16) | C12—C11—N2—C6 | 74.25 (18) |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O1i | 0.93 | 2.48 | 3.405 (2) | 173 |
C14—H14···O1ii | 0.93 | 2.56 | 3.330 (2) | 141 |
Symmetry codes: (i) x−1, y, z; (ii) x, y+1, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
C3—H3···O1i | 0.93 | 2.48 | 3.405 (2) | 172.9 |
C14—H14···O1ii | 0.93 | 2.56 | 3.330 (2) | 140.7 |
Symmetry codes: (i) x−1, y, z; (ii) x, y+1, z. |
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Functionalized benzimidazoles represent an important class of N-containing heterocyclic compounds and have received considerable attention in recent times because of their applications as antiulcers, antihypertensives, antivirals, antifungals, anticancers and antihistamines among others (Gravatt et al., 1994; Soderlind et al., 1999). They are also important intermediates in many organic reactions (Bai et al., 2001) and act as ligands to transition metals for modelling biological systems (Bouwman et al., 1990). In addition, the treatment potency of benzimidazoles in diseases such as ischemia–reperfusion injury (Zhu et al., 2008), hypertension (Ogino et al., 2008), obesity (Shah et al., 2008) etc. have been recently reported.
In continuation of our research work devoted to the development of substituted benzimidazol-2-one derivatives (Belaziz et al., 2012, 2013), we reported a synthesis of new benzimidazol-2-one derivative differently substituted by action of allylbromide with 1-benzyl -1H-benzo[d]imidazol-2(3H)-one in the presence of a catalytic quantity of tetra-n-butylammonium bromide under mild conditions to obtain disubstituted compound (Scheme 1).
The molecule of title compound, 1-allyl-3-(benzyl)-1H-benzo[d]imidazol-2(3H)- one, is built up from two fused five- and six-membered rings linked to a benzyl substituent and an allyl group as shown in Fig. 1. The fused rings system (N1, N2, C1-C7) is essentially planar with the largest deviation from the mean plane being -0.006 (2) A° at C5 atom. The benzyl group and the allyl group are almost perpendicular to the benzo[d]imidazol-2(3H)-one as indicated by the dihedral angles of 80.6 (1) and 77.4 (3) °, respectively.
In the crystal, the molecules are linked by C3–H3···O1 and C14–H14···O1 hydrogen bonds in the way to build two-dimensional network as shown in Fig. 2 and Table 2.