organic compounds
6-[(2-Chloropyridin-5-ylmethyl)(ethyl)azanyl]-4-(2-fluorophenyl)-1-methyl-5-nitro-1,2,3,4-tetrahydropyridin-2-one
aDepartment of Chemistry, College of Life and Environmental Science, Shanghai Normal University, Shanghai 200234, People's Republic of China
*Correspondence e-mail: jingwangchemistry@163.com
In the title compound, C20H20ClFN4O3, the tetrahydropyridone ring adopts a skew boat conformation. The dihedral angle between the mean planes of the benzene and pyridine rings is 80.7 (3)°. In the crystal, weak C—H⋯O interactions are observed.
Related literature
For general background to neonicotinoid compounds and their application as insecticides, see: Jeschke & Nauen (2008); Kagabu & Matsuno (1997); Ohno et al. (2009); Shao et al. (2008); Tian et al. (2007); Tomizawa & Casida (2009). For the synthesis of the title compound, see: Zhang et al. (2010). For puckering parameters, see Cremer & Pople (1975).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2001); cell SMART; data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536812005776/jj2119sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812005776/jj2119Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812005776/jj2119Isup3.mol
Supporting information file. DOI: 10.1107/S1600536812005776/jj2119Isup4.cml
In the preparation of the title compound, a solution of 2-fluorobenzaldehyde (15 mmol), Meldrum's acid (15 mmol) in ethanol (30 ml), with piperidine (0.1 mmol) used as catalyst, was added dropwise and the solution was stirred at room temperature for 2 h. Nitenpyram (2.75 g, 10 mmol) was added to the reaction mixture, heated to 65 °C for 6 h and then cooled to room temperature. The reaction mixture was concentrated under reduced pressure and treated with 20 ml of water whereby the solution was extracted three times with CH2Cl2, and the combined extracts were dried over MgSO4. The organic phase was evaporated under reduced pressure and the crude product was subjected to flash
on silica gel, eluting with ethyl acetate /petroleum ether to afford pure yellow crystals (yield 81%). Anal. calcd. for C20H20ClFN4O3 C 57.33, H 4.80, N 13.36% found, C 57.35, H 4.81, N 13.38%.All H atoms bonded to C were positioned geometrically [C—H = 0.93 Å (aromatic), 0.97 Å (methylene) and 0.96Å (methyl)] and refined in the riding mode with [Uiso(H) = 1.2Ueq(aromatic and methylene C) and 1.5Ueq(methyl C)].
Data collection: SMART (Bruker, 2001); cell
SMART (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C20H20ClFN4O3 | Z = 2 |
Mr = 418.85 | F(000) = 436 |
Triclinic, P1 | Dx = 1.428 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 6.750 (2) Å | Cell parameters from 906 reflections |
b = 8.262 (3) Å | θ = 2.3–19.9° |
c = 17.853 (6) Å | µ = 0.24 mm−1 |
α = 94.981 (6)° | T = 298 K |
β = 91.302 (7)° | Block, yellow |
γ = 100.593 (7)° | 0.23 × 0.20 × 0.20 mm |
V = 974.2 (6) Å3 |
Bruker SMART CCD area-detector diffractometer | 3391 independent reflections |
Radiation source: fine-focus sealed tube | 1943 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.073 |
phi and ω scans | θmax = 25.0°, θmin = 2.3° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | h = −7→8 |
Tmin = 0.938, Tmax = 0.954 | k = −9→9 |
5691 measured reflections | l = −21→16 |
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)] = 0.070 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.151 | H-atom parameters constrained |
S = 0.96 | w = 1/[σ2(Fo2) + (0.0497P)2] where P = (Fo2 + 2Fc2)/3 |
3391 reflections | (Δ/σ)max < 0.001 |
264 parameters | Δρmax = 0.23 e Å−3 |
0 restraints | Δρmin = −0.25 e Å−3 |
C20H20ClFN4O3 | γ = 100.593 (7)° |
Mr = 418.85 | V = 974.2 (6) Å3 |
Triclinic, P1 | Z = 2 |
a = 6.750 (2) Å | Mo Kα radiation |
b = 8.262 (3) Å | µ = 0.24 mm−1 |
c = 17.853 (6) Å | T = 298 K |
α = 94.981 (6)° | 0.23 × 0.20 × 0.20 mm |
β = 91.302 (7)° |
Bruker SMART CCD area-detector diffractometer | 3391 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2003) | 1943 reflections with I > 2σ(I) |
Tmin = 0.938, Tmax = 0.954 | Rint = 0.073 |
5691 measured reflections |
R[F2 > 2σ(F2)] = 0.070 | 0 restraints |
wR(F2) = 0.151 | H-atom parameters constrained |
S = 0.96 | Δρmax = 0.23 e Å−3 |
3391 reflections | Δρmin = −0.25 e Å−3 |
264 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 | ||
Cl1 | −0.0482 (2) | 0.19595 (18) | 1.06337 (7) | 0.0963 (5) | |
F1 | 0.0556 (4) | −0.3141 (3) | 0.57751 (14) | 0.0768 (8) | |
O1 | 0.1183 (4) | 0.3810 (3) | 0.70839 (17) | 0.0579 (8) | |
O2 | 0.0164 (4) | 0.1954 (4) | 0.61628 (17) | 0.0745 (10) | |
O3 | 0.4797 (4) | −0.1603 (3) | 0.82425 (15) | 0.0613 (8) | |
N1 | 0.0698 (5) | 0.3252 (5) | 0.9407 (2) | 0.0677 (11) | |
N2 | 0.5075 (4) | 0.3694 (3) | 0.76441 (15) | 0.0358 (7) | |
N3 | 0.5073 (4) | 0.0931 (3) | 0.78309 (15) | 0.0367 (7) | |
N4 | 0.1287 (5) | 0.2474 (4) | 0.67181 (19) | 0.0457 (8) | |
C1 | 0.1333 (7) | 0.2582 (5) | 0.9985 (2) | 0.0579 (12) | |
C2 | 0.3272 (8) | 0.2367 (5) | 1.0112 (2) | 0.0620 (13) | |
H2 | 0.3632 | 0.1866 | 1.0528 | 0.074* | |
C3 | 0.2101 (7) | 0.3769 (5) | 0.8917 (2) | 0.0595 (12) | |
H3 | 0.1690 | 0.4245 | 0.8501 | 0.071* | |
C4 | 0.4110 (6) | 0.3647 (4) | 0.8982 (2) | 0.0431 (10) | |
C5 | 0.4664 (6) | 0.2921 (5) | 0.9599 (2) | 0.0539 (11) | |
H5 | 0.5998 | 0.2804 | 0.9669 | 0.065* | |
C6 | 0.5569 (6) | 0.4366 (4) | 0.8427 (2) | 0.0475 (11) | |
H6A | 0.5631 | 0.5553 | 0.8461 | 0.057* | |
H6B | 0.6899 | 0.4176 | 0.8567 | 0.057* | |
C7 | 0.5241 (6) | 0.4907 (4) | 0.7083 (2) | 0.0468 (10) | |
H7A | 0.4291 | 0.5638 | 0.7190 | 0.056* | |
H7B | 0.4883 | 0.4331 | 0.6588 | 0.056* | |
C8 | 0.7339 (6) | 0.5922 (5) | 0.7079 (3) | 0.0664 (13) | |
H8A | 0.7682 | 0.6524 | 0.7563 | 0.100* | |
H8B | 0.7388 | 0.6686 | 0.6701 | 0.100* | |
H8C | 0.8283 | 0.5204 | 0.6970 | 0.100* | |
C9 | 0.4199 (5) | 0.2097 (4) | 0.74628 (18) | 0.0333 (9) | |
C10 | 0.2653 (5) | 0.1481 (4) | 0.6955 (2) | 0.0360 (9) | |
C11 | 0.2062 (5) | −0.0340 (4) | 0.6735 (2) | 0.0387 (9) | |
H11 | 0.0674 | −0.0550 | 0.6527 | 0.046* | |
C12 | 0.2044 (5) | −0.1165 (4) | 0.7469 (2) | 0.0444 (10) | |
H12A | 0.0999 | −0.0843 | 0.7782 | 0.053* | |
H12B | 0.1738 | −0.2357 | 0.7359 | 0.053* | |
C13 | 0.4050 (6) | −0.0674 (5) | 0.78885 (19) | 0.0401 (9) | |
C14 | 0.7233 (5) | 0.1245 (5) | 0.8024 (2) | 0.0539 (11) | |
H14A | 0.7442 | 0.1457 | 0.8560 | 0.081* | |
H14B | 0.7887 | 0.2190 | 0.7787 | 0.081* | |
H14C | 0.7789 | 0.0297 | 0.7852 | 0.081* | |
C15 | 0.3356 (5) | −0.1057 (4) | 0.6151 (2) | 0.0371 (9) | |
C16 | 0.2525 (6) | −0.2468 (5) | 0.5697 (2) | 0.0491 (11) | |
C17 | 0.3578 (7) | −0.3229 (5) | 0.5167 (2) | 0.0621 (13) | |
H17 | 0.2958 | −0.4175 | 0.4870 | 0.074* | |
C18 | 0.5569 (7) | −0.2557 (5) | 0.5088 (2) | 0.0590 (12) | |
H18 | 0.6323 | −0.3060 | 0.4740 | 0.071* | |
C19 | 0.6450 (6) | −0.1144 (5) | 0.5521 (2) | 0.0500 (11) | |
H19 | 0.7796 | −0.0685 | 0.5462 | 0.060* | |
C20 | 0.5345 (6) | −0.0401 (5) | 0.6044 (2) | 0.0418 (10) | |
H20 | 0.5957 | 0.0563 | 0.6330 | 0.050* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.1069 (11) | 0.1166 (12) | 0.0622 (9) | 0.0018 (9) | 0.0239 (8) | 0.0258 (8) |
F1 | 0.0722 (17) | 0.0626 (16) | 0.0813 (18) | −0.0162 (13) | 0.0080 (14) | −0.0141 (14) |
O1 | 0.0526 (17) | 0.0505 (18) | 0.077 (2) | 0.0280 (15) | −0.0045 (15) | 0.0027 (16) |
O2 | 0.074 (2) | 0.072 (2) | 0.077 (2) | 0.0232 (17) | −0.0420 (18) | −0.0028 (17) |
O3 | 0.087 (2) | 0.0429 (17) | 0.0585 (19) | 0.0198 (16) | −0.0108 (16) | 0.0156 (15) |
N1 | 0.062 (2) | 0.098 (3) | 0.044 (2) | 0.014 (2) | 0.0000 (19) | 0.013 (2) |
N2 | 0.0406 (18) | 0.0324 (17) | 0.0344 (17) | 0.0059 (14) | 0.0014 (14) | 0.0049 (14) |
N3 | 0.0360 (17) | 0.0358 (17) | 0.0382 (18) | 0.0071 (14) | −0.0067 (14) | 0.0046 (14) |
N4 | 0.0395 (19) | 0.045 (2) | 0.054 (2) | 0.0081 (16) | −0.0040 (17) | 0.0101 (17) |
C1 | 0.073 (3) | 0.059 (3) | 0.038 (3) | 0.006 (2) | 0.003 (2) | −0.001 (2) |
C2 | 0.089 (4) | 0.059 (3) | 0.038 (3) | 0.010 (3) | −0.007 (2) | 0.010 (2) |
C3 | 0.067 (3) | 0.077 (3) | 0.037 (2) | 0.015 (3) | −0.002 (2) | 0.013 (2) |
C4 | 0.050 (3) | 0.040 (2) | 0.036 (2) | 0.008 (2) | −0.0077 (19) | −0.0111 (18) |
C5 | 0.064 (3) | 0.056 (3) | 0.042 (3) | 0.015 (2) | −0.012 (2) | 0.004 (2) |
C6 | 0.055 (3) | 0.037 (2) | 0.046 (2) | 0.0004 (19) | −0.008 (2) | −0.0034 (18) |
C7 | 0.056 (3) | 0.037 (2) | 0.050 (2) | 0.0093 (19) | 0.004 (2) | 0.0132 (19) |
C8 | 0.059 (3) | 0.054 (3) | 0.089 (4) | 0.007 (2) | 0.017 (3) | 0.028 (3) |
C9 | 0.036 (2) | 0.035 (2) | 0.031 (2) | 0.0089 (17) | 0.0030 (17) | 0.0075 (16) |
C10 | 0.033 (2) | 0.035 (2) | 0.041 (2) | 0.0104 (17) | −0.0037 (17) | 0.0038 (17) |
C11 | 0.032 (2) | 0.040 (2) | 0.042 (2) | 0.0021 (17) | −0.0060 (17) | 0.0020 (18) |
C12 | 0.046 (2) | 0.040 (2) | 0.045 (2) | 0.0019 (18) | 0.0107 (19) | 0.0051 (18) |
C13 | 0.056 (3) | 0.039 (2) | 0.026 (2) | 0.012 (2) | 0.0009 (18) | 0.0049 (17) |
C14 | 0.043 (2) | 0.052 (3) | 0.068 (3) | 0.014 (2) | −0.010 (2) | 0.003 (2) |
C15 | 0.042 (2) | 0.035 (2) | 0.035 (2) | 0.0100 (18) | −0.0018 (17) | 0.0062 (17) |
C16 | 0.054 (3) | 0.041 (2) | 0.048 (3) | −0.003 (2) | −0.001 (2) | 0.006 (2) |
C17 | 0.089 (4) | 0.046 (3) | 0.049 (3) | 0.013 (3) | 0.011 (3) | −0.006 (2) |
C18 | 0.076 (3) | 0.065 (3) | 0.044 (3) | 0.031 (3) | 0.009 (2) | 0.010 (2) |
C19 | 0.054 (3) | 0.064 (3) | 0.037 (2) | 0.022 (2) | 0.001 (2) | 0.009 (2) |
C20 | 0.049 (2) | 0.046 (2) | 0.032 (2) | 0.011 (2) | −0.0010 (18) | 0.0057 (18) |
Cl1—C1 | 1.744 (4) | C7—H7B | 0.9700 |
F1—C16 | 1.358 (4) | C8—H8A | 0.9600 |
O1—N4 | 1.247 (4) | C8—H8B | 0.9600 |
O2—N4 | 1.231 (4) | C8—H8C | 0.9600 |
O3—C13 | 1.206 (4) | C9—C10 | 1.360 (4) |
N1—C1 | 1.312 (5) | C10—C11 | 1.499 (5) |
N1—C3 | 1.342 (5) | C11—C15 | 1.526 (5) |
N2—C9 | 1.352 (4) | C11—C12 | 1.527 (5) |
N2—C6 | 1.467 (4) | C11—H11 | 0.9800 |
N2—C7 | 1.469 (4) | C12—C13 | 1.503 (5) |
N3—C13 | 1.391 (4) | C12—H12A | 0.9700 |
N3—C9 | 1.417 (4) | C12—H12B | 0.9700 |
N3—C14 | 1.461 (4) | C14—H14A | 0.9600 |
N4—C10 | 1.422 (4) | C14—H14B | 0.9600 |
C1—C2 | 1.370 (6) | C14—H14C | 0.9600 |
C2—C5 | 1.373 (5) | C15—C20 | 1.376 (5) |
C2—H2 | 0.9300 | C15—C16 | 1.381 (5) |
C3—C4 | 1.381 (5) | C16—C17 | 1.373 (5) |
C3—H3 | 0.9300 | C17—C18 | 1.372 (5) |
C4—C5 | 1.374 (5) | C17—H17 | 0.9300 |
C4—C6 | 1.495 (5) | C18—C19 | 1.371 (5) |
C5—H5 | 0.9300 | C18—H18 | 0.9300 |
C6—H6A | 0.9700 | C19—C20 | 1.381 (5) |
C6—H6B | 0.9700 | C19—H19 | 0.9300 |
C7—C8 | 1.508 (5) | C20—H20 | 0.9300 |
C7—H7A | 0.9700 | ||
C1—N1—C3 | 115.8 (4) | N2—C9—N3 | 115.0 (3) |
C9—N2—C6 | 121.8 (3) | C10—C9—N3 | 116.8 (3) |
C9—N2—C7 | 121.2 (3) | C9—C10—N4 | 121.7 (3) |
C6—N2—C7 | 116.1 (3) | C9—C10—C11 | 121.2 (3) |
C13—N3—C9 | 122.3 (3) | N4—C10—C11 | 116.0 (3) |
C13—N3—C14 | 115.9 (3) | C10—C11—C15 | 115.7 (3) |
C9—N3—C14 | 120.6 (3) | C10—C11—C12 | 105.8 (3) |
O2—N4—O1 | 121.0 (3) | C15—C11—C12 | 112.4 (3) |
O2—N4—C10 | 118.5 (3) | C10—C11—H11 | 107.5 |
O1—N4—C10 | 120.4 (3) | C15—C11—H11 | 107.5 |
N1—C1—C2 | 125.1 (4) | C12—C11—H11 | 107.5 |
N1—C1—Cl1 | 115.6 (4) | C13—C12—C11 | 110.8 (3) |
C2—C1—Cl1 | 119.3 (4) | C13—C12—H12A | 109.5 |
C1—C2—C5 | 117.3 (4) | C11—C12—H12A | 109.5 |
C1—C2—H2 | 121.4 | C13—C12—H12B | 109.5 |
C5—C2—H2 | 121.4 | C11—C12—H12B | 109.5 |
N1—C3—C4 | 125.0 (4) | H12A—C12—H12B | 108.1 |
N1—C3—H3 | 117.5 | O3—C13—N3 | 120.4 (3) |
C4—C3—H3 | 117.5 | O3—C13—C12 | 123.4 (3) |
C5—C4—C3 | 116.0 (4) | N3—C13—C12 | 116.2 (3) |
C5—C4—C6 | 123.5 (4) | N3—C14—H14A | 109.5 |
C3—C4—C6 | 120.3 (4) | N3—C14—H14B | 109.5 |
C2—C5—C4 | 120.8 (4) | H14A—C14—H14B | 109.5 |
C2—C5—H5 | 119.6 | N3—C14—H14C | 109.5 |
C4—C5—H5 | 119.6 | H14A—C14—H14C | 109.5 |
N2—C6—C4 | 114.6 (3) | H14B—C14—H14C | 109.5 |
N2—C6—H6A | 108.6 | C20—C15—C16 | 116.4 (4) |
C4—C6—H6A | 108.6 | C20—C15—C11 | 124.4 (3) |
N2—C6—H6B | 108.6 | C16—C15—C11 | 119.2 (3) |
C4—C6—H6B | 108.6 | F1—C16—C17 | 118.1 (4) |
H6A—C6—H6B | 107.6 | F1—C16—C15 | 118.4 (4) |
N2—C7—C8 | 112.1 (3) | C17—C16—C15 | 123.6 (4) |
N2—C7—H7A | 109.2 | C18—C17—C16 | 118.3 (4) |
C8—C7—H7A | 109.2 | C18—C17—H17 | 120.9 |
N2—C7—H7B | 109.2 | C16—C17—H17 | 120.9 |
C8—C7—H7B | 109.2 | C19—C18—C17 | 120.1 (4) |
H7A—C7—H7B | 107.9 | C19—C18—H18 | 119.9 |
C7—C8—H8A | 109.5 | C17—C18—H18 | 119.9 |
C7—C8—H8B | 109.5 | C18—C19—C20 | 120.2 (4) |
H8A—C8—H8B | 109.5 | C18—C19—H19 | 119.9 |
C7—C8—H8C | 109.5 | C20—C19—H19 | 119.9 |
H8A—C8—H8C | 109.5 | C15—C20—C19 | 121.4 (4) |
H8B—C8—H8C | 109.5 | C15—C20—H20 | 119.3 |
N2—C9—C10 | 128.1 (3) | C19—C20—H20 | 119.3 |
C3—N1—C1—C2 | −0.7 (7) | O2—N4—C10—C11 | −24.8 (5) |
C3—N1—C1—Cl1 | 178.5 (3) | O1—N4—C10—C11 | 152.5 (3) |
N1—C1—C2—C5 | 1.1 (7) | C9—C10—C11—C15 | −80.5 (4) |
Cl1—C1—C2—C5 | −178.1 (3) | N4—C10—C11—C15 | 111.0 (3) |
C1—N1—C3—C4 | −0.2 (7) | C9—C10—C11—C12 | 44.6 (4) |
N1—C3—C4—C5 | 0.7 (6) | N4—C10—C11—C12 | −123.9 (3) |
N1—C3—C4—C6 | −175.9 (4) | C10—C11—C12—C13 | −56.2 (4) |
C1—C2—C5—C4 | −0.5 (6) | C15—C11—C12—C13 | 70.9 (4) |
C3—C4—C5—C2 | −0.3 (6) | C9—N3—C13—O3 | −175.8 (3) |
C6—C4—C5—C2 | 176.2 (3) | C14—N3—C13—O3 | 17.0 (5) |
C9—N2—C6—C4 | −34.4 (5) | C9—N3—C13—C12 | 6.1 (5) |
C7—N2—C6—C4 | 134.8 (3) | C14—N3—C13—C12 | −161.1 (3) |
C5—C4—C6—N2 | 124.5 (4) | C11—C12—C13—O3 | −143.5 (4) |
C3—C4—C6—N2 | −59.1 (5) | C11—C12—C13—N3 | 34.5 (4) |
C9—N2—C7—C8 | −131.8 (4) | C10—C11—C15—C20 | 27.1 (5) |
C6—N2—C7—C8 | 58.8 (4) | C12—C11—C15—C20 | −94.5 (4) |
C6—N2—C9—C10 | 136.3 (4) | C10—C11—C15—C16 | −153.7 (3) |
C7—N2—C9—C10 | −32.4 (5) | C12—C11—C15—C16 | 84.6 (4) |
C6—N2—C9—N3 | −46.4 (4) | C20—C15—C16—F1 | −179.0 (3) |
C7—N2—C9—N3 | 144.8 (3) | C11—C15—C16—F1 | 1.8 (5) |
C13—N3—C9—N2 | 160.7 (3) | C20—C15—C16—C17 | 0.9 (6) |
C14—N3—C9—N2 | −32.6 (4) | C11—C15—C16—C17 | −178.4 (4) |
C13—N3—C9—C10 | −21.8 (5) | F1—C16—C17—C18 | −179.8 (4) |
C14—N3—C9—C10 | 144.9 (3) | C15—C16—C17—C18 | 0.4 (6) |
N2—C9—C10—N4 | −21.6 (6) | C16—C17—C18—C19 | −1.2 (6) |
N3—C9—C10—N4 | 161.2 (3) | C17—C18—C19—C20 | 0.7 (6) |
N2—C9—C10—C11 | 170.6 (3) | C16—C15—C20—C19 | −1.4 (5) |
N3—C9—C10—C11 | −6.6 (5) | C11—C15—C20—C19 | 177.8 (3) |
O2—N4—C10—C9 | 166.7 (3) | C18—C19—C20—C15 | 0.7 (5) |
O1—N4—C10—C9 | −16.0 (5) |
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8C···O1i | 0.96 | 2.46 | 3.383 (5) | 161 |
C6—H6A···O3ii | 0.97 | 2.57 | 3.506 (5) | 161 |
C3—H3···O1 | 0.93 | 2.53 | 3.320 (5) | 143 |
C2—H2···O3iii | 0.93 | 2.46 | 3.344 (5) | 159 |
Symmetry codes: (i) x+1, y, z; (ii) x, y+1, z; (iii) −x+1, −y, −z+2. |
Experimental details
Crystal data | |
Chemical formula | C20H20ClFN4O3 |
Mr | 418.85 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 6.750 (2), 8.262 (3), 17.853 (6) |
α, β, γ (°) | 94.981 (6), 91.302 (7), 100.593 (7) |
V (Å3) | 974.2 (6) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.24 |
Crystal size (mm) | 0.23 × 0.20 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2003) |
Tmin, Tmax | 0.938, 0.954 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5691, 3391, 1943 |
Rint | 0.073 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.070, 0.151, 0.96 |
No. of reflections | 3391 |
No. of parameters | 264 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.23, −0.25 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
C8—H8C···O1i | 0.96 | 2.46 | 3.383 (5) | 161 |
C6—H6A···O3ii | 0.97 | 2.57 | 3.506 (5) | 161 |
C3—H3···O1 | 0.93 | 2.53 | 3.320 (5) | 143 |
C2—H2···O3iii | 0.93 | 2.46 | 3.344 (5) | 159 |
Symmetry codes: (i) x+1, y, z; (ii) x, y+1, z; (iii) −x+1, −y, −z+2. |
Acknowledgements
This work was supported mostly by the National Natural Science Foundation of China (grant Nos 21042010, 21102092 and 30870560).
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.
In recent years, neonicotinoid insecticide compounds have rapidly grown and become a new chemical class of insecticides because of their novel structure and mode of action (Jeschke & Nauen,2008; Kagabu & Matsuno,1997; Ohno et al., 2009; Shao et al., 2008; Tian et al., 2007; Tomizawa & Casida, 2009). We report here the synthesis and crystal structure of one of these compounds, C20H20ClFN4O3, the title compound, (I).
In (I) the tetrahydropyridone ring adopts a skew boat conformation with puckering paramers (Cremer & Pople, 1975) Q, θ and ϕ of 0.526 (4)Å, 113.2 (4)° and 22.0 (4)°) and a N2/C9/C10/N4 dihedral angle of -21.6 (6)° (Fig.1). In the tetrahydropyridone moiety, C11—C10, C12—C11 and C13—C12 bond lengths (1.499 (5) Å, 1.527 (5) Å and 1.503 (5) Å) are slightly shorter than normal. The C13—N3, C9—N3, and C10—N4 bond lengths (1.391 (4)Å, 1.417 (4)Å, and 1.422 (4)Å, respectively) are slightly shorter than normal while the C9═C10 bond length (1.360 (4)Å) is slightly longer than normal. The dihedral angle between the mean planes of the benzene and pryidine rings is 80.7 (3)°. In the crystal structure weak C2—H2···O3, C8—H8C···O1 and C6—H6A···O3 intermolecular interactions are observed which may influence crystal packing (Fig.2).