organic compounds
(E)-1-[(1,3-Dioxan-4-yl)methyl]-2-(nitromethylidene)imidazolidine
aShandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, People's Republic of China, and bSchool of Sciences, University of Jinan, People's Republic of China
*Correspondence e-mail: chm_lidm@ujn.edu.cn
In the title compound, C9H15N3O4, the 1,3-dioxane ring displays a chair conformation and the five-membered ring is close to planar (r.m.s. deviation = 0.054 Å). An intramolecular N—H⋯O hydrogen bond to one of the nitro-group O atoms generates an S(6) ring. In the crystal, intermolecular N—H⋯O hydrogen bonds link the molecules into C(6) chains propagating in [010] and a C—H⋯O link also occurs.
Related literature
For a related structure, see Tian et al. (2009). For background to neonicotinoid insecticides, see Mori et al. (2001); Ohno et al. (2009); Jeschke & Nauen (2008); Kagabu (1997); Tian et al. (2007).
Experimental
Crystal data
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Refinement
|
Data collection: APEX2 (Bruker, 2005); cell SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: WinGX (Farrugia, 1999).
Supporting information
https://doi.org/10.1107/S1600536810032691/hb5607sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810032691/hb5607Isup2.hkl
A solution of N-((1,3-dioxan-4-yl)methyl)ethane-1,2-diamine (2 mmol), and 1,1-bis(thiomethyl)-2-nitroethylene (2 mmol) in 30 ml of ethanol was refluxed for 8 h and then cooled to room temperature. Evaporation under reduced pressure gave the title product after purifiction by flash
Colourless prisms of (I) were obtained by slow evaporation of a solution of the title compound in dichloromethane and ethyl acetate.All H atoms were placed in their calculated positions and then refined using riding model with C—H = 0.93–0.99 Å, Uiso(H) = 1.2 (1.5 for methyl groups) times Ueq(C).
By virtue of novel modes of action (targeting insect nicotinic acetylcholine receptors (nAChRs) (Ohno et al., 2009), low mammalian toxicity, broad insecticidal spectra, and good systemic properties (Jeschke et al., 2008), neonicotinoids has accounted for 18% of world insecticide sales in the past decades. Our interest was introducing oxygen atoms into the lead struture and synthesizing a series of new compounds, in which the title compound exhibited moderate insecticidal activities against pea aphids.
The structure of the title compound is shown in Fig. 1 with the atom-numbering scheme. The 1,3-dioxane ring displays an chair conformation with bond angles lying between 110.0 (2)° and 111.7 (2)°. The nitro moiety is in trans configuration relative to the 1,3-dioxane ring and coplanar with the olefin-amine plane [N3—C2—C1—N1 = -177.49 (18)°]. Around N2 and N3 atoms the sums of the angles are 360° and 359.72°, respectively, indicating that they are typical sp2 hybridized and leading to an essentially planar imidazole ring.
For a related structure, see Tian et al. (2009). For background to neonicotinoid insecticides, see Mori et al. (2001); Ohno et al. (2009); Jeschke et al. (2008); Kagabu (1997); Tian et al. (2007).
Data collection: APEX2 (Bruker, 2005); cell
SAINT (Bruker, 2005); data reduction: SAINT (Bruker, 2005); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: WinGX (Farrugia, 1999).Fig. 1. The molecular structure of (I) with displacement ellipsoids drawn at the 40% probability level. The H atoms are shown as spheres of arbitrary size. |
C9H15N3O4 | F(000) = 488 |
Mr = 229.24 | Dx = 1.426 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2831 reflections |
a = 5.0138 (4) Å | θ = 3.5–28.7° |
b = 9.8092 (9) Å | µ = 0.11 mm−1 |
c = 21.7162 (18) Å | T = 296 K |
β = 90° | Prism, colourless |
V = 1068.03 (16) Å3 | 0.42 × 0.26 × 0.16 mm |
Z = 4 |
Bruker APEXII CCD diffractometer | 1933 independent reflections |
Radiation source: fine-focus sealed tube | 1395 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.022 |
φ and ω scans | θmax = 25.4°, θmin = 3.5° |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | h = −6→6 |
Tmin = 0.954, Tmax = 0.982 | k = −11→11 |
5866 measured reflections | l = −26→26 |
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)] = 0.054 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.174 | H-atom parameters constrained |
S = 1.10 | w = 1/[σ2(Fo2) + (0.1126P)2] where P = (Fo2 + 2Fc2)/3 |
1933 reflections | (Δ/σ)max < 0.001 |
145 parameters | Δρmax = 0.35 e Å−3 |
0 restraints | Δρmin = −0.28 e Å−3 |
C9H15N3O4 | V = 1068.03 (16) Å3 |
Mr = 229.24 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 5.0138 (4) Å | µ = 0.11 mm−1 |
b = 9.8092 (9) Å | T = 296 K |
c = 21.7162 (18) Å | 0.42 × 0.26 × 0.16 mm |
β = 90° |
Bruker APEXII CCD diffractometer | 1933 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 1395 reflections with I > 2σ(I) |
Tmin = 0.954, Tmax = 0.982 | Rint = 0.022 |
5866 measured reflections |
R[F2 > 2σ(F2)] = 0.054 | 0 restraints |
wR(F2) = 0.174 | H-atom parameters constrained |
S = 1.10 | Δρmax = 0.35 e Å−3 |
1933 reflections | Δρmin = −0.28 e Å−3 |
145 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 | ||
O2 | 0.7955 (3) | 0.71286 (16) | 0.23056 (8) | 0.0532 (5) | |
N1 | 0.7422 (4) | 0.58813 (19) | 0.22961 (9) | 0.0420 (5) | |
C2 | 0.3945 (4) | 0.6124 (2) | 0.30617 (10) | 0.0343 (5) | |
O3 | 0.2691 (4) | 0.39753 (16) | 0.44986 (7) | 0.0536 (5) | |
N2 | 0.4042 (4) | 0.74655 (19) | 0.31417 (9) | 0.0435 (5) | |
H2 | 0.5038 | 0.8003 | 0.2930 | 0.052* | |
C1 | 0.5501 (4) | 0.5344 (2) | 0.26581 (10) | 0.0390 (6) | |
H1 | 0.5196 | 0.4409 | 0.2638 | 0.047* | |
N3 | 0.2104 (4) | 0.55718 (19) | 0.34370 (8) | 0.0421 (5) | |
O1 | 0.8720 (4) | 0.51016 (18) | 0.19406 (9) | 0.0640 (6) | |
C5 | 0.1287 (5) | 0.4153 (2) | 0.34624 (11) | 0.0432 (6) | |
H5A | 0.1514 | 0.3753 | 0.3057 | 0.052* | |
H5B | −0.0597 | 0.4115 | 0.3563 | 0.052* | |
C6 | 0.2786 (5) | 0.3314 (2) | 0.39185 (10) | 0.0406 (6) | |
H6 | 0.4653 | 0.3268 | 0.3787 | 0.049* | |
O4 | 0.2921 (5) | 0.1954 (2) | 0.50513 (9) | 0.0741 (7) | |
C7 | 0.1743 (5) | 0.1882 (2) | 0.39737 (11) | 0.0453 (6) | |
H7A | 0.2109 | 0.1387 | 0.3596 | 0.054* | |
H7B | −0.0175 | 0.1904 | 0.4032 | 0.054* | |
C4 | 0.0734 (5) | 0.6627 (3) | 0.37948 (11) | 0.0474 (6) | |
H4B | 0.0835 | 0.6438 | 0.4233 | 0.057* | |
H4A | −0.1125 | 0.6699 | 0.3675 | 0.057* | |
C3 | 0.2257 (5) | 0.7920 (2) | 0.36326 (11) | 0.0507 (7) | |
H3A | 0.1061 | 0.8629 | 0.3488 | 0.061* | |
H3B | 0.3255 | 0.8258 | 0.3984 | 0.061* | |
C9 | 0.4109 (7) | 0.3220 (3) | 0.49462 (13) | 0.0653 (8) | |
H9A | 0.5930 | 0.3086 | 0.4808 | 0.078* | |
H9B | 0.4163 | 0.3731 | 0.5328 | 0.078* | |
C8 | 0.3037 (7) | 0.1152 (3) | 0.45115 (13) | 0.0651 (8) | |
H8B | 0.2132 | 0.0293 | 0.4583 | 0.078* | |
H8A | 0.4885 | 0.0956 | 0.4413 | 0.078* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O2 | 0.0554 (11) | 0.0286 (10) | 0.0756 (13) | −0.0030 (7) | 0.0114 (9) | 0.0037 (8) |
N1 | 0.0450 (11) | 0.0278 (11) | 0.0533 (12) | 0.0051 (8) | 0.0010 (9) | 0.0052 (9) |
C2 | 0.0377 (11) | 0.0255 (12) | 0.0397 (12) | 0.0020 (9) | −0.0111 (9) | 0.0038 (9) |
O3 | 0.0719 (11) | 0.0445 (11) | 0.0443 (10) | −0.0009 (9) | −0.0041 (8) | −0.0026 (8) |
N2 | 0.0474 (11) | 0.0262 (10) | 0.0569 (12) | 0.0006 (8) | 0.0004 (9) | 0.0001 (9) |
C1 | 0.0458 (13) | 0.0261 (12) | 0.0451 (13) | −0.0020 (9) | −0.0025 (10) | 0.0019 (10) |
N3 | 0.0524 (12) | 0.0317 (11) | 0.0423 (11) | −0.0025 (8) | 0.0010 (9) | 0.0015 (8) |
O1 | 0.0772 (13) | 0.0398 (11) | 0.0750 (13) | 0.0116 (9) | 0.0302 (10) | 0.0017 (10) |
C5 | 0.0450 (13) | 0.0410 (14) | 0.0437 (13) | −0.0091 (11) | −0.0063 (10) | 0.0035 (10) |
C6 | 0.0441 (12) | 0.0376 (13) | 0.0399 (12) | −0.0056 (10) | −0.0015 (9) | 0.0002 (10) |
O4 | 0.1233 (19) | 0.0549 (12) | 0.0441 (10) | −0.0022 (12) | 0.0030 (11) | 0.0089 (9) |
C7 | 0.0536 (14) | 0.0350 (13) | 0.0471 (14) | −0.0038 (10) | 0.0041 (11) | −0.0019 (10) |
C4 | 0.0462 (13) | 0.0482 (15) | 0.0477 (13) | 0.0052 (11) | −0.0027 (10) | −0.0031 (12) |
C3 | 0.0677 (17) | 0.0349 (14) | 0.0494 (14) | 0.0088 (12) | −0.0027 (12) | −0.0024 (11) |
C9 | 0.095 (2) | 0.0565 (18) | 0.0446 (15) | 0.0001 (15) | −0.0174 (14) | 0.0038 (13) |
C8 | 0.096 (2) | 0.0411 (16) | 0.0584 (17) | 0.0051 (15) | 0.0003 (15) | 0.0049 (13) |
O2—N1 | 1.253 (2) | C6—H6 | 0.9800 |
N1—C1 | 1.350 (3) | C6—C7 | 1.504 (3) |
N1—O1 | 1.267 (2) | O4—C9 | 1.396 (4) |
C2—N2 | 1.329 (3) | O4—C8 | 1.413 (3) |
C2—C1 | 1.401 (3) | C7—H7A | 0.9700 |
C2—N3 | 1.345 (3) | C7—H7B | 0.9700 |
O3—C6 | 1.418 (3) | C7—C8 | 1.516 (4) |
O3—C9 | 1.414 (3) | C4—H4B | 0.9700 |
N2—H2 | 0.8600 | C4—H4A | 0.9700 |
N2—C3 | 1.462 (3) | C4—C3 | 1.522 (4) |
C1—H1 | 0.9300 | C3—H3A | 0.9700 |
N3—C5 | 1.452 (3) | C3—H3B | 0.9700 |
N3—C4 | 1.465 (3) | C9—H9A | 0.9700 |
C5—H5A | 0.9700 | C9—H9B | 0.9700 |
C5—H5B | 0.9700 | C8—H8B | 0.9700 |
C5—C6 | 1.491 (3) | C8—H8A | 0.9700 |
O2—N1—C1 | 121.61 (19) | H5A—C5—H5B | 107.6 |
O2—N1—O1 | 119.35 (19) | C6—C5—H5A | 108.7 |
N1—C1—C2 | 123.2 (2) | C6—C5—H5B | 108.7 |
N1—C1—H1 | 118.4 | C6—C7—H7A | 109.5 |
C2—N2—H2 | 124.0 | C6—C7—H7B | 109.5 |
C2—N2—C3 | 112.0 (2) | C6—C7—C8 | 110.7 (2) |
C2—C1—H1 | 118.4 | O4—C9—O3 | 111.3 (2) |
C2—N3—C5 | 127.03 (19) | O4—C9—H9A | 109.4 |
C2—N3—C4 | 111.03 (19) | O4—C9—H9B | 109.4 |
O3—C6—C5 | 108.72 (19) | O4—C8—C7 | 111.0 (2) |
O3—C6—H6 | 108.2 | O4—C8—H8B | 109.4 |
O3—C6—C7 | 110.17 (18) | O4—C8—H8A | 109.4 |
O3—C9—H9A | 109.4 | C7—C6—H6 | 108.2 |
O3—C9—H9B | 109.4 | C7—C8—H8B | 109.4 |
N2—C2—C1 | 127.1 (2) | C7—C8—H8A | 109.4 |
N2—C2—N3 | 110.1 (2) | H7A—C7—H7B | 108.1 |
N2—C3—C4 | 102.82 (18) | C4—C3—H3A | 111.2 |
N2—C3—H3A | 111.2 | C4—C3—H3B | 111.2 |
N2—C3—H3B | 111.2 | H4B—C4—H4A | 109.1 |
N3—C2—C1 | 122.80 (19) | C3—N2—H2 | 124.0 |
N3—C5—H5A | 108.7 | C3—C4—H4B | 111.1 |
N3—C5—H5B | 108.7 | C3—C4—H4A | 111.1 |
N3—C5—C6 | 114.35 (18) | H3A—C3—H3B | 109.1 |
N3—C4—H4B | 111.1 | C9—O3—C6 | 110.8 (2) |
N3—C4—H4A | 111.1 | C9—O4—C8 | 110.0 (2) |
N3—C4—C3 | 103.34 (19) | H9A—C9—H9B | 108.0 |
O1—N1—C1 | 119.04 (19) | C8—C7—H7A | 109.5 |
C5—N3—C4 | 121.66 (19) | C8—C7—H7B | 109.5 |
C5—C6—H6 | 108.2 | H8B—C8—H8A | 108.0 |
C5—C6—C7 | 113.16 (18) | ||
O2—N1—C1—C2 | 0.9 (3) | N3—C5—C6—O3 | 52.3 (3) |
C2—N2—C3—C4 | −7.0 (2) | N3—C5—C6—C7 | 175.06 (19) |
C2—N3—C5—C6 | 92.4 (3) | N3—C4—C3—N2 | 7.6 (2) |
C2—N3—C4—C3 | −6.3 (2) | O1—N1—C1—C2 | −179.4 (2) |
O3—C6—C7—C8 | −49.0 (3) | C5—N3—C4—C3 | 179.39 (19) |
N2—C2—C1—N1 | 1.8 (3) | C5—C6—C7—C8 | −170.9 (2) |
N2—C2—N3—C5 | 176.06 (19) | C6—O3—C9—O4 | −64.4 (3) |
N2—C2—N3—C4 | 2.1 (2) | C6—C7—C8—O4 | 49.6 (3) |
C1—C2—N2—C3 | −176.0 (2) | C4—N3—C5—C6 | −94.3 (3) |
C1—C2—N3—C5 | −4.5 (3) | C9—O3—C6—C5 | −179.5 (2) |
C1—C2—N3—C4 | −178.49 (19) | C9—O3—C6—C7 | 56.0 (3) |
N3—C2—N2—C3 | 3.4 (2) | C9—O4—C8—C7 | −56.4 (3) |
N3—C2—C1—N1 | −177.49 (18) | C8—O4—C9—O3 | 64.1 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···O2 | 0.86 | 2.17 | 2.694 (3) | 119 |
N2—H2···O1i | 0.86 | 2.17 | 2.824 (3) | 133 |
C1—H1···O2ii | 0.93 | 2.42 | 3.249 (3) | 148 |
Symmetry codes: (i) −x+3/2, y+1/2, −z+1/2; (ii) −x+3/2, y−1/2, −z+1/2. |
Experimental details
Crystal data | |
Chemical formula | C9H15N3O4 |
Mr | 229.24 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 296 |
a, b, c (Å) | 5.0138 (4), 9.8092 (9), 21.7162 (18) |
β (°) | 90, 90, 90 |
V (Å3) | 1068.03 (16) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.11 |
Crystal size (mm) | 0.42 × 0.26 × 0.16 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2005) |
Tmin, Tmax | 0.954, 0.982 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5866, 1933, 1395 |
Rint | 0.022 |
(sin θ/λ)max (Å−1) | 0.602 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.054, 0.174, 1.10 |
No. of reflections | 1933 |
No. of parameters | 145 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.35, −0.28 |
Computer programs: APEX2 (Bruker, 2005), SAINT (Bruker, 2005), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2···O2 | 0.86 | 2.17 | 2.694 (3) | 119 |
N2—H2···O1i | 0.86 | 2.17 | 2.824 (3) | 133 |
C1—H1···O2ii | 0.93 | 2.42 | 3.249 (3) | 148 |
Symmetry codes: (i) −x+3/2, y+1/2, −z+1/2; (ii) −x+3/2, y−1/2, −z+1/2. |
Acknowledgements
The authors thank the National Natural Science Foundation of China (grant No. 20902037), the Opening Fund of Shanghai Key Laboratory of Chemical Biology (grant No. SKLCB-2008–08) and Doctoral Foundation of University of Jinan (B0542) 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.
By virtue of novel modes of action (targeting insect nicotinic acetylcholine receptors (nAChRs) (Ohno et al., 2009), low mammalian toxicity, broad insecticidal spectra, and good systemic properties (Jeschke et al., 2008), neonicotinoids has accounted for 18% of world insecticide sales in the past decades. Our interest was introducing oxygen atoms into the lead struture and synthesizing a series of new compounds, in which the title compound exhibited moderate insecticidal activities against pea aphids.
The structure of the title compound is shown in Fig. 1 with the atom-numbering scheme. The 1,3-dioxane ring displays an chair conformation with bond angles lying between 110.0 (2)° and 111.7 (2)°. The nitro moiety is in trans configuration relative to the 1,3-dioxane ring and coplanar with the olefin-amine plane [N3—C2—C1—N1 = -177.49 (18)°]. Around N2 and N3 atoms the sums of the angles are 360° and 359.72°, respectively, indicating that they are typical sp2 hybridized and leading to an essentially planar imidazole ring.