organic compounds
4-(4-Fluorophenyl)-2-oxo-1,2,5,6-tetrahydrobenzo[h]quinoline-3-carbonitrile
aDepartment of Public Health, Xuzhou Medical College, Xuzhou 221000, People's Republic of China, and bCollege of Chemistry and Chemical Engineering, Xuzhou Normal University, Xuzhou 221116, People's Republic of China
*Correspondence e-mail: yanshu126@126.com
In the molecule of the title compound, C20H13FN2O, the fluorophenyl ring is oriented at a dihedral angle of 72.76 (3)° with respect to the fused benzene ring. In the intermolecular N—H⋯O, C—H⋯O and C—H⋯F interactions link the molecules into chains. π–π contacts between the quinoline and benzene rings [centroid–centroid distance = 3.918 (3) Å] may further stabilize the structure. A weak C—H⋯π interaction is also present. The O atom and two of the CH2 groups of the quinoline ring system are disordered over two positions. The O atom was refined with occupancies of 0.489 (17) and 0.511 (17), while C and H atoms were refined with occupancies of 0.435 (13) and 0.565 (13).
Related literature
For general background to substituted six-membered ); Plunkett (1994); Robertson et al. (1986). For bond-length data, see: Allen et al. (1987).
see: Daly (1998Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1998); cell SAINT (Bruker, 1998); 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, 1997); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2009).
Supporting information
10.1107/S1600536809017991/hk2684sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536809017991/hk2684Isup2.hkl
The title compound was prepared by the reaction of 3,4-dihydronaphthalen-1(2H) -one (2 mmol), aromatic
(2 mmol), malononitrile (3 mmol) and NaOH (2 mmol) under solvent-free conditions using heating method.The O1, C12, C13, H12A, H12B, H13A and H13B atoms were disordered. During the
process, the disordered C and H atoms were refined with occupancies of 0.435 (13) and 0.565 (13), while O atom was refined with occupancies of 0.489 (17) and 0.511 (17). H atoms were positioned geometrically with N-H = 0.86 Å (for NH) and C-H = 0.93 and 0.97 Å, for aromatic and methylene H atoms, respectively, and constrained to ride on their parent atoms, with Uiso(H) = 1.2Ueq(C,N).Data collection: SMART (Bruker, 1998); cell
SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); 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, 1997); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title molecule, with the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. | |
Fig. 2. A partial packing diagram of the title compound. Hydrogen bonds are shown as dashed lines. |
C20H13FN2O | Z = 2 |
Mr = 316.32 | F(000) = 328 |
Triclinic, P1 | Dx = 1.365 Mg m−3 |
Hall symbol: -P 1 | Melting point > 598 K |
a = 8.116 (10) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 9.278 (12) Å | Cell parameters from 929 reflections |
c = 11.263 (14) Å | θ = 2.3–25.4° |
α = 98.674 (19)° | µ = 0.09 mm−1 |
β = 105.095 (17)° | T = 298 K |
γ = 104.846 (18)° | Block, colourless |
V = 769.7 (16) Å3 | 0.48 × 0.35 × 0.33 mm |
Bruker SMART CCD area-detector diffractometer | 2656 independent reflections |
Radiation source: fine-focus sealed tube | 1399 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.020 |
ϕ and ω scans | θmax = 25.0°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −9→9 |
Tmin = 0.956, Tmax = 0.970 | k = −11→8 |
3950 measured reflections | l = −9→13 |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.048 | H-atom parameters constrained |
wR(F2) = 0.144 | w = 1/[σ2(Fo2) + (0.0683P)2] where P = (Fo2 + 2Fc2)/3 |
S = 1.00 | (Δ/σ)max < 0.001 |
2656 reflections | Δρmax = 0.15 e Å−3 |
240 parameters | Δρmin = −0.17 e Å−3 |
Primary atom site location: structure-invariant direct methods |
C20H13FN2O | γ = 104.846 (18)° |
Mr = 316.32 | V = 769.7 (16) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.116 (10) Å | Mo Kα radiation |
b = 9.278 (12) Å | µ = 0.09 mm−1 |
c = 11.263 (14) Å | T = 298 K |
α = 98.674 (19)° | 0.48 × 0.35 × 0.33 mm |
β = 105.095 (17)° |
Bruker SMART CCD area-detector diffractometer | 2656 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 1399 reflections with I > 2σ(I) |
Tmin = 0.956, Tmax = 0.970 | Rint = 0.020 |
3950 measured reflections |
R[F2 > 2σ(F2)] = 0.048 | 240 parameters |
wR(F2) = 0.144 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.15 e Å−3 |
2656 reflections | Δρmin = −0.17 e Å−3 |
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 | Occ. (<1) | |
F1 | 0.2899 (2) | 0.4261 (2) | −0.18711 (16) | 0.1127 (7) | |
N1 | 0.2029 (3) | 0.1315 (2) | 0.45914 (18) | 0.0580 (6) | |
H1 | 0.1926 | 0.0948 | 0.5235 | 0.070* | |
N2 | −0.2136 (3) | 0.1660 (3) | 0.0916 (2) | 0.0781 (7) | |
O1 | −0.101 (3) | 0.0761 (19) | 0.3875 (16) | 0.063 (2) | 0.489 (17) |
O1' | −0.100 (2) | 0.0203 (19) | 0.3604 (16) | 0.063 (2) | 0.511 (17) |
C1 | 0.0482 (3) | 0.1170 (3) | 0.3667 (2) | 0.0589 (7) | |
C2 | 0.0742 (3) | 0.1847 (3) | 0.2646 (2) | 0.0474 (6) | |
C3 | 0.2423 (3) | 0.2493 (3) | 0.2576 (2) | 0.0449 (6) | |
C4 | 0.3947 (3) | 0.2594 (3) | 0.3564 (2) | 0.0514 (7) | |
C5 | 0.3716 (3) | 0.1991 (3) | 0.4576 (2) | 0.0441 (6) | |
C6 | 0.5250 (3) | 0.2014 (3) | 0.5626 (2) | 0.0472 (6) | |
C7 | 0.5053 (4) | 0.1393 (3) | 0.6645 (2) | 0.0611 (7) | |
H7 | 0.3908 | 0.0975 | 0.6694 | 0.073* | |
C8 | 0.6514 (4) | 0.1387 (3) | 0.7579 (2) | 0.0673 (8) | |
H8 | 0.6354 | 0.0973 | 0.8259 | 0.081* | |
C9 | 0.8191 (4) | 0.1978 (3) | 0.7521 (3) | 0.0705 (8) | |
H9 | 0.9181 | 0.1954 | 0.8149 | 0.085* | |
C10 | 0.8420 (4) | 0.2613 (4) | 0.6529 (3) | 0.0817 (9) | |
H10 | 0.9575 | 0.3021 | 0.6496 | 0.098* | |
C11 | 0.6977 (4) | 0.2660 (3) | 0.5580 (2) | 0.0652 (8) | |
C12 | 0.7151 (13) | 0.2943 (16) | 0.4310 (10) | 0.060 (2) | 0.435 (13) |
H12A | 0.8345 | 0.3611 | 0.4429 | 0.072* | 0.435 (13) |
H12B | 0.6964 | 0.1979 | 0.3740 | 0.072* | 0.435 (13) |
C13 | 0.5770 (13) | 0.3675 (14) | 0.3755 (13) | 0.061 (3) | 0.435 (13) |
H13A | 0.5955 | 0.4640 | 0.4323 | 0.073* | 0.435 (13) |
H13B | 0.5872 | 0.3880 | 0.2953 | 0.073* | 0.435 (13) |
C12' | 0.7237 (10) | 0.3759 (13) | 0.4687 (7) | 0.069 (2) | 0.565 (13) |
H12C | 0.7097 | 0.4729 | 0.5027 | 0.083* | 0.565 (13) |
H12D | 0.8432 | 0.3954 | 0.4608 | 0.083* | 0.565 (13) |
C13' | 0.5852 (10) | 0.3014 (12) | 0.3417 (7) | 0.059 (2) | 0.565 (13) |
H13C | 0.6068 | 0.2095 | 0.3046 | 0.071* | 0.565 (13) |
H13D | 0.5936 | 0.3710 | 0.2858 | 0.071* | 0.565 (13) |
C14 | 0.2601 (3) | 0.3026 (3) | 0.1417 (2) | 0.0493 (6) | |
C15 | 0.2276 (4) | 0.4341 (3) | 0.1176 (3) | 0.0681 (8) | |
H15 | 0.1976 | 0.4956 | 0.1764 | 0.082* | |
C16 | 0.2388 (4) | 0.4774 (4) | 0.0065 (3) | 0.0769 (9) | |
H16 | 0.2165 | 0.5671 | −0.0098 | 0.092* | |
C17 | 0.2827 (4) | 0.3865 (4) | −0.0771 (3) | 0.0729 (9) | |
C18 | 0.3162 (4) | 0.2565 (4) | −0.0566 (3) | 0.0858 (10) | |
H18 | 0.3456 | 0.1957 | −0.1163 | 0.103* | |
C19 | 0.3064 (4) | 0.2146 (4) | 0.0539 (3) | 0.0769 (9) | |
H19 | 0.3314 | 0.1256 | 0.0696 | 0.092* | |
C20 | −0.0853 (4) | 0.1739 (3) | 0.1674 (2) | 0.0561 (7) |
U11 | U22 | U33 | U12 | U13 | U23 | |
F1 | 0.0932 (13) | 0.1675 (19) | 0.0723 (12) | 0.0028 (12) | 0.0250 (10) | 0.0801 (12) |
N1 | 0.0489 (13) | 0.0912 (17) | 0.0447 (12) | 0.0206 (12) | 0.0199 (11) | 0.0405 (12) |
N2 | 0.0698 (17) | 0.100 (2) | 0.0663 (16) | 0.0261 (15) | 0.0106 (14) | 0.0435 (15) |
O1 | 0.0480 (12) | 0.100 (8) | 0.058 (6) | 0.025 (5) | 0.027 (3) | 0.044 (5) |
O1' | 0.0480 (12) | 0.100 (8) | 0.058 (6) | 0.025 (5) | 0.027 (3) | 0.044 (5) |
C1 | 0.0495 (16) | 0.088 (2) | 0.0505 (16) | 0.0231 (15) | 0.0207 (14) | 0.0367 (15) |
C2 | 0.0511 (15) | 0.0574 (16) | 0.0420 (14) | 0.0187 (13) | 0.0187 (12) | 0.0256 (12) |
C3 | 0.0535 (15) | 0.0467 (15) | 0.0418 (14) | 0.0153 (12) | 0.0212 (12) | 0.0207 (12) |
C4 | 0.0509 (15) | 0.0569 (16) | 0.0503 (15) | 0.0113 (13) | 0.0198 (13) | 0.0266 (13) |
C5 | 0.0461 (14) | 0.0482 (15) | 0.0414 (14) | 0.0141 (12) | 0.0164 (12) | 0.0163 (12) |
C6 | 0.0485 (15) | 0.0505 (16) | 0.0426 (14) | 0.0140 (13) | 0.0143 (12) | 0.0131 (12) |
C7 | 0.0549 (17) | 0.078 (2) | 0.0479 (16) | 0.0119 (14) | 0.0124 (13) | 0.0282 (14) |
C8 | 0.072 (2) | 0.068 (2) | 0.0521 (17) | 0.0144 (16) | 0.0056 (16) | 0.0245 (15) |
C9 | 0.064 (2) | 0.080 (2) | 0.0585 (19) | 0.0225 (17) | 0.0024 (15) | 0.0179 (16) |
C10 | 0.0517 (18) | 0.114 (3) | 0.080 (2) | 0.0235 (18) | 0.0158 (16) | 0.037 (2) |
C11 | 0.0536 (17) | 0.085 (2) | 0.0588 (17) | 0.0193 (15) | 0.0158 (14) | 0.0276 (16) |
C12 | 0.043 (4) | 0.072 (6) | 0.068 (5) | 0.015 (5) | 0.020 (4) | 0.026 (4) |
C13 | 0.065 (5) | 0.062 (6) | 0.057 (5) | 0.012 (4) | 0.024 (4) | 0.024 (4) |
C12' | 0.055 (3) | 0.079 (5) | 0.071 (4) | 0.010 (4) | 0.021 (3) | 0.029 (4) |
C13' | 0.049 (3) | 0.071 (5) | 0.062 (5) | 0.010 (4) | 0.024 (3) | 0.032 (4) |
C14 | 0.0499 (15) | 0.0571 (16) | 0.0440 (15) | 0.0110 (13) | 0.0178 (12) | 0.0253 (13) |
C15 | 0.084 (2) | 0.0655 (19) | 0.0653 (19) | 0.0249 (16) | 0.0280 (16) | 0.0360 (15) |
C16 | 0.077 (2) | 0.075 (2) | 0.079 (2) | 0.0134 (17) | 0.0159 (18) | 0.0533 (18) |
C17 | 0.0537 (18) | 0.108 (3) | 0.0502 (18) | −0.0009 (18) | 0.0128 (14) | 0.0486 (19) |
C18 | 0.104 (3) | 0.112 (3) | 0.064 (2) | 0.038 (2) | 0.0474 (19) | 0.041 (2) |
C19 | 0.112 (3) | 0.086 (2) | 0.0628 (19) | 0.046 (2) | 0.0480 (19) | 0.0436 (17) |
C20 | 0.0602 (18) | 0.0676 (18) | 0.0495 (17) | 0.0195 (15) | 0.0222 (15) | 0.0318 (14) |
F1—C17 | 1.356 (3) | C10—C11 | 1.381 (4) |
N1—C5 | 1.358 (3) | C10—H10 | 0.9300 |
N1—C1 | 1.367 (3) | C11—C12 | 1.528 (9) |
N1—H1 | 0.8600 | C11—C12' | 1.550 (8) |
N2—C20 | 1.139 (3) | C12—C13 | 1.505 (14) |
O1—C1 | 1.267 (18) | C12—H12A | 0.9700 |
O1'—C1 | 1.279 (18) | C12—H12B | 0.9700 |
C1—C2 | 1.428 (3) | C13—H13A | 0.9700 |
C2—C3 | 1.370 (3) | C13—H13B | 0.9700 |
C2—C20 | 1.431 (4) | C12'—C13' | 1.501 (12) |
C3—C4 | 1.404 (3) | C12'—H12C | 0.9700 |
C3—C14 | 1.491 (3) | C12'—H12D | 0.9700 |
C4—C5 | 1.377 (3) | C13'—H13C | 0.9700 |
C4—C13 | 1.499 (10) | C13'—H13D | 0.9700 |
C4—C13' | 1.553 (8) | C14—C15 | 1.363 (4) |
C5—C6 | 1.470 (3) | C14—C19 | 1.376 (4) |
C6—C7 | 1.387 (3) | C15—C16 | 1.389 (4) |
C6—C11 | 1.394 (4) | C15—H15 | 0.9300 |
C7—C8 | 1.367 (4) | C16—C17 | 1.347 (4) |
C7—H7 | 0.9300 | C16—H16 | 0.9300 |
C8—C9 | 1.354 (4) | C17—C18 | 1.342 (4) |
C8—H8 | 0.9300 | C18—C19 | 1.375 (4) |
C9—C10 | 1.371 (4) | C18—H18 | 0.9300 |
C9—H9 | 0.9300 | C19—H19 | 0.9300 |
C5—N1—C1 | 125.3 (2) | C13—C12—H12A | 109.9 |
C5—N1—H1 | 117.4 | C11—C12—H12A | 109.9 |
C1—N1—H1 | 117.4 | C13—C12—H12B | 109.9 |
O1—C1—N1 | 119.7 (9) | C11—C12—H12B | 109.9 |
O1'—C1—N1 | 120.2 (8) | H12A—C12—H12B | 108.3 |
O1—C1—C2 | 124.0 (9) | C4—C13—C12 | 108.2 (9) |
O1'—C1—C2 | 123.2 (8) | C4—C13—H13A | 110.1 |
N1—C1—C2 | 114.7 (2) | C12—C13—H13A | 110.1 |
C3—C2—C1 | 121.7 (2) | C4—C13—H13B | 110.1 |
C3—C2—C20 | 122.2 (2) | C12—C13—H13B | 110.1 |
C1—C2—C20 | 116.0 (2) | H13A—C13—H13B | 108.4 |
C2—C3—C4 | 120.1 (2) | C13'—C12'—C11 | 108.2 (7) |
C2—C3—C14 | 119.1 (2) | C13'—C12'—H12C | 110.1 |
C4—C3—C14 | 120.8 (2) | C11—C12'—H12C | 110.1 |
C5—C4—C3 | 118.8 (2) | C13'—C12'—H12D | 110.1 |
C5—C4—C13 | 116.3 (5) | C11—C12'—H12D | 110.1 |
C3—C4—C13 | 122.8 (5) | H12C—C12'—H12D | 108.4 |
C5—C4—C13' | 118.0 (4) | C12'—C13'—C4 | 109.8 (7) |
C3—C4—C13' | 121.8 (4) | C12'—C13'—H13C | 109.7 |
N1—C5—C4 | 119.4 (2) | C4—C13'—H13C | 109.7 |
N1—C5—C6 | 118.8 (2) | C12'—C13'—H13D | 109.7 |
C4—C5—C6 | 121.8 (2) | C4—C13'—H13D | 109.7 |
C7—C6—C11 | 118.7 (2) | H13C—C13'—H13D | 108.2 |
C7—C6—C5 | 122.9 (2) | C15—C14—C19 | 118.4 (2) |
C11—C6—C5 | 118.4 (2) | C15—C14—C3 | 122.3 (2) |
C8—C7—C6 | 121.1 (3) | C19—C14—C3 | 119.2 (2) |
C8—C7—H7 | 119.5 | C14—C15—C16 | 120.9 (3) |
C6—C7—H7 | 119.5 | C14—C15—H15 | 119.5 |
C9—C8—C7 | 120.4 (3) | C16—C15—H15 | 119.5 |
C9—C8—H8 | 119.8 | C17—C16—C15 | 118.4 (3) |
C7—C8—H8 | 119.8 | C17—C16—H16 | 120.8 |
C8—C9—C10 | 119.5 (3) | C15—C16—H16 | 120.8 |
C8—C9—H9 | 120.2 | C18—C17—C16 | 122.5 (3) |
C10—C9—H9 | 120.2 | C18—C17—F1 | 118.7 (3) |
C9—C10—C11 | 121.6 (3) | C16—C17—F1 | 118.8 (3) |
C9—C10—H10 | 119.2 | C17—C18—C19 | 118.9 (3) |
C11—C10—H10 | 119.2 | C17—C18—H18 | 120.5 |
C10—C11—C6 | 118.7 (3) | C19—C18—H18 | 120.5 |
C10—C11—C12 | 121.7 (4) | C18—C19—C14 | 120.9 (3) |
C6—C11—C12 | 117.1 (4) | C18—C19—H19 | 119.6 |
C10—C11—C12' | 120.9 (4) | C14—C19—H19 | 119.6 |
C6—C11—C12' | 118.5 (4) | N2—C20—C2 | 178.8 (3) |
C13—C12—C11 | 108.8 (9) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.86 | 2.08 | 2.883 (3) | 155 |
C7—H7···O1i | 0.93 | 2.35 | 3.223 (3) | 157 |
C12—H12B···O1ii | 0.97 | 2.21 | 2.863 (3) | 124 |
C13—H13B···F1iii | 0.97 | 2.42 | 3.270 (3) | 147 |
C15—H15···Cg3iv | 0.93 | 2.90 | 3.671 (3) | 141 |
Symmetry codes: (i) −x, −y, −z+1; (ii) x+1, y, z; (iii) −x+1, −y+1, −z; (iv) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C20H13FN2O |
Mr | 316.32 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 8.116 (10), 9.278 (12), 11.263 (14) |
α, β, γ (°) | 98.674 (19), 105.095 (17), 104.846 (18) |
V (Å3) | 769.7 (16) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.48 × 0.35 × 0.33 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.956, 0.970 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 3950, 2656, 1399 |
Rint | 0.020 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.048, 0.144, 1.00 |
No. of reflections | 2656 |
No. of parameters | 240 |
No. of restraints | ? |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.15, −0.17 |
Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), SHELXL97 (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.86 | 2.08 | 2.883 (3) | 155 |
C7—H7···O1i | 0.93 | 2.35 | 3.223 (3) | 157 |
C12—H12B···O1ii | 0.97 | 2.21 | 2.863 (3) | 124 |
C13—H13B···F1iii | 0.97 | 2.42 | 3.270 (3) | 147 |
C15—H15···Cg3iv | 0.93 | 2.90 | 3.671 (3) | 141 |
Symmetry codes: (i) −x, −y, −z+1; (ii) x+1, y, z; (iii) −x+1, −y+1, −z; (iv) −x+1, −y+1, −z+1. |
Acknowledgements
The authors thank the National Natural Science Foundation of China (grant No. 30872143) and the Foundation of Xuzhou Medical College (grant No. 08 K J50) for financial support.
References
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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.
Substituted six-membered lactams have attracted the attention of synthetic organic chemists for many years because these structural features are found in a wide variety of naturally occurring alkaloids (Daly, 1998; Plunkett, 1994). Since compounds with these scaffolds have been shown to exhibit significant pharmacological properties, medicinal chemists often incorporate these motifs in the design of novel biologically active molecules. For example, compounds Arnrinone 1 and Milrinone 2 are the cardiotonic drugs (Robertson et al., 1986) and that have been found to display effective activities on therapy of miocardial infarction. Development of a general and efficient synthetic strategy to synthesize those compounds is still desired. We report herein the crystal structure of the title compound.
In the molecule of the title compound (Fig. 1), the bond lengths (Allen et al., 1987) and angles are within normal ranges. Rings A (N1/C1-C5), C (C6-C11) and D (C14-C19) are, of course, planar and they are oriented at dihedral angles of A/C = 3.57 (3), A/D = 76.11 (3) and C/D = 72.76 (3) °. Ring B (C4-C6/C11-C13) is not planar, and adopts twisted conformation.
In the crystal structure, intermolecular N-H···O, C-H···O and C-H···F interactions (Table 1) link the molecules into chains (Fig. 2), in which they may be effective in the stabilization of the structure. The π···π contact between the quinoline and the benzene rings, Cg1—Cg3i [symmetry code: (i) 1 - x, -y, 1 - z, where Cg1 and Cg3 are centroids of the rings A (N1/C1-C5) and C (C6-C11), respectively] may further stabilize the structure, with centroid-centroid distance of 3.918 (3) Å. There also exists a weak C-H···π interaction (Table 1).