Abstract
The title compound, C16H18ClNO3, was obtained by the organocatalytic asymmetric Michael addition of cyclohexanone to 1-chloro-4-[(1E,3E)-4-nitrobuta-1,3-dienyl]benzene. The double bond has an E configuration. The cyclohexanone ring adopts a chair conformation. The conformation of the molecule is stabilized by a weak intramolecular C—H⋯O hydrogen bond.
Related literature
For asymmetric Michael addition reactions employing chiral organocatalysts, see: Belot et al. (2008 ▶); Dalko & Moisan (2004 ▶); Yu et al. (2009 ▶). For details of the synthesis, see: Xu et al. (2008 ▶); For puckering parameters, see: Cremer & Pople (1975 ▶).
Experimental
Crystal data
C16H18ClNO3
M r = 307.78
Orthorhombic,
a = 5.5300 (3) Å
b = 8.5175 (6) Å
c = 34.0903 (18) Å
V = 1605.71 (17) Å3
Z = 4
Mo Kα radiation
μ = 0.25 mm−1
T = 296 K
0.48 × 0.32 × 0.28 mm
Data collection
Rigaku R-AXIS RAPID diffractometer
Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T min = 0.879, T max = 0.933
15644 measured reflections
2148 independent reflections
1391 reflections with F 2 > 2σ(F 2)
R int = 0.034
Refinement
R[F 2 > 2σ(F 2)] = 0.044
wR(F 2) = 0.124
S = 1.00
2148 reflections
192 parameters
H-atom parameters constrained
Δρmax = 0.22 e Å−3
Δρmin = −0.27 e Å−3
Absolute structure: Flack (1983 ▶), 1486 Friedel pairs
Flack parameter: 0.27 (18)
Data collection: PROCESS-AUTO (Rigaku, 2006 ▶); cell refinement: PROCESS-AUTO; data reduction: CrystalStructure (Rigaku, 2007 ▶); program(s) used to solve structure: SIR97 (Altomare et al., 1999 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997 ▶); software used to prepare material for publication: CrystalStructure.
Supplementary Material
Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809029213/bx2224sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536809029213/bx2224Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report
Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C8—H81⋯O1 | 0.97 | 2.37 | 3.020 (4) | 124 |
Acknowledgments
We acknowledge the help of Professor Jianming Gu of Zhejiang University. We are also grateful for financial support by the Catalytic Hydrogenation Research Center of Zhejiang University of Technology.
supplementary crystallographic information
Comment
As one of the most important chiral carbon-carbon bond-forming processes in modern organic chemistry, the field of asymmetric Michael addition employing chiral organocatalysts has gained more and more attention and become the focus of intense research efforts (Dalko & Moisan, 2004; Belot et al., 2008; Yu et al., 2009). Consequently, we have synthesized a series of Michael adducts by employing cyclo-ketones to nitrodienes in our laboratory. We report here the crystal structure and the absolute configuration of the title compound, (I). The cyclohexanone ring adopts a chair conformation as shown by the Cremer & Pople (1975) puckering parameters [QT = 0.568 (4) Å , θ=3.9 (4)° , φ=355 (6) °]. The C1—C9—C10—C11 torsion angle of 175.2 (3) confirms the E configuration of the molecule with respect to the C9═C10 bond. The conformation of (I) is stabilized by one weak intramolecular C—H···O hydrogen bond, Table 1, Fig 1.
Experimental
A 1,2-dichloroethane (0.5 ml) solution of cyclohexanone (0.25 mmol) and 1-chloro-4-((1E,3E)-4-nitrobuta-1,3-dienyl)benzene (0.25 mmol) in the presence of (S)-1-methyl-2-(pyrrolidin-2-ylmethylthio)-1H-imidazole (0.025 mmol) as amine catalyst and (R)-2-(3-(3,5-bis(trifluoromethyl)phenyl)thioureido)-2-phenylacetic acid (0.025 mmol) as acid module at room tempreture was stirred vigorously (Xu et al., 2008). After completion of the reaction, the resulted reaction mixture was purified directly by silica gel column chromatography (eluent: petroleum ether-EtOAc). Single crystals were obtained by slow evaporation of an ethanol-dichloromethane solution.
Refinement
All carbon-bonded H atoms were placed in calculated positions with C—H = 0.93 Å (aromatic), C—H = 0.98 Å (sp2), C—H = 0.97 Å (sp3) and refined using a riding model, with Uiso(H)=1.2eq(C).
The absolute configuration of this compound is established from both the diffraction data and the absolute configuration of a similar compound reported in Xu et al. (2008), therein the organocatalyst has the same structure as in the title compound.
Figures
Fig. 1.
The asymmetric unit of the title compound with the atomic labeling scheme; displacement ellipsoids are drawn at the 30% probability level. Dotted lines show hydrogen bonding.
Crystal data
| C16H18ClNO3 | F(000) = 648.00 |
| Mr = 307.78 | Dx = 1.273 Mg m−3 |
| Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71075 Å |
| Hall symbol: P 2ac 2ab | Cell parameters from 9533 reflections |
| a = 5.5300 (3) Å | θ = 3.0–27.4° |
| b = 8.5175 (6) Å | µ = 0.25 mm−1 |
| c = 34.0903 (18) Å | T = 296 K |
| V = 1605.71 (17) Å3 | Chunk, colourless |
| Z = 4 | 0.48 × 0.32 × 0.28 mm |
Data collection
| Rigaku R-AXIS RAPID diffractometer | 1391 reflections with F2 > 2σ(F2) |
| Detector resolution: 10.00 pixels mm-1 | Rint = 0.034 |
| ω scans | θmax = 27.4° |
| Absorption correction: multi-scan (ABSCOR; Higashi, 1995) | h = −7→6 |
| Tmin = 0.879, Tmax = 0.933 | k = −11→11 |
| 15644 measured reflections | l = −43→44 |
| 2148 independent reflections |
Refinement
| Refinement on F2 | (Δ/σ)max = 0.001 |
| R[F2 > 2σ(F2)] = 0.044 | Δρmax = 0.22 e Å−3 |
| wR(F2) = 0.124 | Δρmin = −0.27 e Å−3 |
| S = 1.00 | Extinction correction: SHELXL97 (Sheldrick, 2008) |
| 2148 reflections | Extinction coefficient: 0.027 (2) |
| 192 parameters | Absolute structure: Flack (1983), 1486 Friedel pairs |
| H-atom parameters constrained | Flack parameter: 0.27 (18) |
| w = 1/[σ2(Fo2) + (0.032P)2 + 1.2P] where P = (Fo2 + 2Fc2)/3 |
Special details
| Geometry. ENTER SPECIAL DETAILS OF THE MOLECULAR GEOMETRY |
| Refinement. Refinement using all reflections. The weighted R-factor (wR) and goodness of fit (S) are based on F2. R-factor (gt) are based on F. The threshold expression of F2 > 2.0 σ(F2) is used only for calculating R-factor (gt). |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)
| x | y | z | Uiso*/Ueq | ||
| Cl1 | 0.6163 (3) | 0.6280 (2) | 1.07164 (3) | 0.1211 (6) | |
| O1 | 0.9458 (5) | 0.1436 (3) | 0.77121 (8) | 0.0735 (8) | |
| O2 | 1.2699 (5) | 0.5169 (4) | 0.83637 (10) | 0.0841 (9) | |
| O3 | 0.9882 (6) | 0.6855 (3) | 0.84395 (12) | 0.1019 (12) | |
| N1 | 1.0607 (6) | 0.5581 (4) | 0.83299 (10) | 0.0633 (8) | |
| C1 | 0.8554 (6) | 0.3047 (4) | 0.84336 (9) | 0.0497 (8) | |
| C2 | 0.6749 (6) | 0.1873 (4) | 0.82559 (9) | 0.0486 (7) | |
| C3 | 0.6291 (9) | 0.0456 (4) | 0.85244 (10) | 0.0705 (12) | |
| C4 | 0.4412 (9) | −0.0647 (5) | 0.83580 (12) | 0.0801 (13) | |
| C5 | 0.5077 (9) | −0.1218 (5) | 0.79532 (12) | 0.0764 (12) | |
| C6 | 0.5632 (7) | 0.0143 (4) | 0.76796 (10) | 0.0643 (10) | |
| C7 | 0.7474 (7) | 0.1200 (4) | 0.78612 (10) | 0.0532 (8) | |
| C8 | 0.8838 (7) | 0.4463 (4) | 0.81622 (10) | 0.0562 (9) | |
| C9 | 0.7707 (7) | 0.3624 (4) | 0.88279 (9) | 0.0552 (8) | |
| C10 | 0.8919 (7) | 0.3590 (4) | 0.91561 (10) | 0.0601 (9) | |
| C11 | 0.8194 (7) | 0.4250 (4) | 0.95375 (10) | 0.0596 (9) | |
| C12 | 0.6144 (9) | 0.5173 (5) | 0.95838 (12) | 0.0754 (12) | |
| C13 | 0.5508 (9) | 0.5783 (5) | 0.99460 (12) | 0.0809 (13) | |
| C14 | 0.6932 (9) | 0.5491 (5) | 1.02636 (12) | 0.0754 (12) | |
| C15 | 0.8973 (10) | 0.4591 (6) | 1.02286 (12) | 0.0837 (14) | |
| C16 | 0.9577 (8) | 0.3972 (5) | 0.98675 (11) | 0.0726 (12) | |
| H1 | 1.0127 | 0.2531 | 0.8464 | 0.060* | |
| H2 | 0.5206 | 0.2421 | 0.8221 | 0.058* | |
| H9 | 0.6159 | 0.4048 | 0.8839 | 0.066* | |
| H10 | 1.0415 | 0.3092 | 0.9148 | 0.072* | |
| H12 | 0.5177 | 0.5386 | 0.9367 | 0.090* | |
| H13 | 0.4118 | 0.6389 | 0.9972 | 0.097* | |
| H15 | 0.9943 | 0.4398 | 1.0446 | 0.100* | |
| H16 | 1.0952 | 0.3350 | 0.9846 | 0.087* | |
| H31 | 0.7795 | −0.0114 | 0.8558 | 0.085* | |
| H32 | 0.5737 | 0.0833 | 0.8777 | 0.085* | |
| H41 | 0.4259 | −0.1546 | 0.8531 | 0.096* | |
| H42 | 0.2875 | −0.0101 | 0.8344 | 0.096* | |
| H51 | 0.3737 | −0.1816 | 0.7847 | 0.092* | |
| H52 | 0.6493 | −0.1886 | 0.7972 | 0.092* | |
| H61 | 0.6255 | −0.0263 | 0.7434 | 0.077* | |
| H62 | 0.4162 | 0.0732 | 0.7631 | 0.077* | |
| H81 | 0.9403 | 0.4111 | 0.7908 | 0.067* | |
| H82 | 0.7287 | 0.4981 | 0.8133 | 0.067* |
Atomic displacement parameters (Å2)
| U11 | U22 | U33 | U12 | U13 | U23 | |
| Cl1 | 0.1546 (14) | 0.1453 (13) | 0.0635 (6) | −0.0040 (13) | 0.0179 (8) | −0.0299 (7) |
| O1 | 0.0658 (17) | 0.0833 (19) | 0.0716 (16) | −0.0074 (17) | 0.0162 (14) | −0.0129 (15) |
| O2 | 0.0494 (16) | 0.086 (2) | 0.117 (2) | −0.0064 (16) | −0.0101 (17) | 0.006 (2) |
| O3 | 0.087 (2) | 0.0605 (17) | 0.158 (3) | −0.005 (2) | −0.018 (2) | −0.023 (2) |
| N1 | 0.0585 (19) | 0.0535 (18) | 0.078 (2) | −0.0089 (18) | −0.0045 (18) | 0.0029 (17) |
| C1 | 0.0521 (19) | 0.0498 (18) | 0.0472 (16) | −0.0037 (18) | −0.0020 (16) | −0.0009 (15) |
| C2 | 0.0516 (18) | 0.0480 (18) | 0.0462 (15) | −0.0035 (17) | 0.0013 (15) | −0.0015 (14) |
| C3 | 0.101 (3) | 0.061 (2) | 0.0486 (18) | −0.032 (2) | 0.001 (2) | 0.0005 (17) |
| C4 | 0.109 (3) | 0.067 (2) | 0.064 (2) | −0.037 (2) | 0.000 (2) | −0.003 (2) |
| C5 | 0.095 (3) | 0.058 (2) | 0.076 (2) | −0.010 (2) | −0.009 (2) | −0.009 (2) |
| C6 | 0.072 (2) | 0.068 (2) | 0.0534 (19) | −0.009 (2) | −0.0023 (19) | −0.0126 (18) |
| C7 | 0.057 (2) | 0.053 (2) | 0.0501 (17) | 0.0003 (19) | −0.0022 (17) | −0.0014 (16) |
| C8 | 0.060 (2) | 0.050 (2) | 0.0583 (19) | −0.014 (2) | −0.0097 (18) | 0.0038 (16) |
| C9 | 0.058 (2) | 0.055 (2) | 0.0526 (17) | −0.0046 (19) | −0.0029 (17) | −0.0023 (17) |
| C10 | 0.063 (2) | 0.064 (2) | 0.0537 (18) | 0.005 (2) | −0.0053 (18) | −0.0025 (17) |
| C11 | 0.064 (2) | 0.060 (2) | 0.0547 (19) | −0.005 (2) | −0.0032 (18) | −0.0040 (17) |
| C12 | 0.079 (2) | 0.089 (3) | 0.058 (2) | 0.010 (2) | −0.006 (2) | −0.006 (2) |
| C13 | 0.085 (3) | 0.089 (3) | 0.069 (2) | 0.014 (3) | 0.002 (2) | −0.012 (2) |
| C14 | 0.090 (3) | 0.079 (2) | 0.058 (2) | −0.012 (3) | 0.006 (2) | −0.007 (2) |
| C15 | 0.097 (3) | 0.101 (3) | 0.053 (2) | −0.006 (3) | −0.011 (2) | −0.005 (2) |
| C16 | 0.075 (2) | 0.085 (3) | 0.059 (2) | 0.004 (2) | −0.011 (2) | −0.003 (2) |
Geometric parameters (Å, °)
| Cl1—C14 | 1.736 (4) | C14—C15 | 1.370 (7) |
| O1—C7 | 1.226 (4) | C15—C16 | 1.380 (5) |
| O2—N1 | 1.214 (4) | C1—H1 | 0.980 |
| O3—N1 | 1.216 (4) | C2—H2 | 0.980 |
| N1—C8 | 1.480 (5) | C3—H31 | 0.970 |
| C1—C2 | 1.537 (4) | C3—H32 | 0.970 |
| C1—C8 | 1.528 (4) | C4—H41 | 0.970 |
| C1—C9 | 1.506 (4) | C4—H42 | 0.970 |
| C2—C3 | 1.536 (5) | C5—H51 | 0.970 |
| C2—C7 | 1.516 (4) | C5—H52 | 0.970 |
| C3—C4 | 1.512 (6) | C6—H61 | 0.970 |
| C4—C5 | 1.509 (5) | C6—H62 | 0.970 |
| C5—C6 | 1.519 (5) | C8—H81 | 0.970 |
| C6—C7 | 1.494 (5) | C8—H82 | 0.970 |
| C9—C10 | 1.305 (4) | C9—H9 | 0.930 |
| C10—C11 | 1.472 (5) | C10—H10 | 0.930 |
| C11—C12 | 1.389 (6) | C12—H12 | 0.930 |
| C11—C16 | 1.381 (5) | C13—H13 | 0.930 |
| C12—C13 | 1.385 (6) | C15—H15 | 0.930 |
| C13—C14 | 1.362 (6) | C16—H16 | 0.930 |
| O2—N1—O3 | 122.9 (3) | C2—C3—H32 | 108.8 |
| O2—N1—C8 | 118.7 (3) | C4—C3—H31 | 108.8 |
| O3—N1—C8 | 118.4 (3) | C4—C3—H32 | 108.8 |
| C2—C1—C8 | 110.0 (2) | H31—C3—H32 | 109.5 |
| C2—C1—C9 | 111.2 (2) | C3—C4—H41 | 108.8 |
| C8—C1—C9 | 108.3 (2) | C3—C4—H42 | 108.8 |
| C1—C2—C3 | 112.5 (2) | C5—C4—H41 | 108.8 |
| C1—C2—C7 | 115.1 (2) | C5—C4—H42 | 108.8 |
| C3—C2—C7 | 106.0 (2) | H41—C4—H42 | 109.5 |
| C2—C3—C4 | 112.2 (3) | C4—C5—H51 | 109.0 |
| C3—C4—C5 | 112.1 (3) | C4—C5—H52 | 109.0 |
| C4—C5—C6 | 111.4 (3) | C6—C5—H51 | 109.0 |
| C5—C6—C7 | 110.1 (3) | C6—C5—H52 | 109.0 |
| O1—C7—C2 | 122.9 (3) | H51—C5—H52 | 109.5 |
| O1—C7—C6 | 122.5 (3) | C5—C6—H61 | 109.3 |
| C2—C7—C6 | 114.5 (3) | C5—C6—H62 | 109.3 |
| N1—C8—C1 | 110.0 (2) | C7—C6—H61 | 109.3 |
| C1—C9—C10 | 126.8 (3) | C7—C6—H62 | 109.3 |
| C9—C10—C11 | 127.5 (3) | H61—C6—H62 | 109.5 |
| C10—C11—C12 | 122.6 (3) | N1—C8—H81 | 109.3 |
| C10—C11—C16 | 120.2 (3) | N1—C8—H82 | 109.3 |
| C12—C11—C16 | 117.2 (3) | C1—C8—H81 | 109.3 |
| C11—C12—C13 | 121.4 (4) | C1—C8—H82 | 109.3 |
| C12—C13—C14 | 119.6 (4) | H81—C8—H82 | 109.5 |
| Cl1—C14—C13 | 119.6 (3) | C1—C9—H9 | 116.6 |
| Cl1—C14—C15 | 119.7 (3) | C10—C9—H9 | 116.6 |
| C13—C14—C15 | 120.6 (4) | C9—C10—H10 | 116.2 |
| C14—C15—C16 | 119.4 (4) | C11—C10—H10 | 116.2 |
| C11—C16—C15 | 121.8 (4) | C11—C12—H12 | 119.3 |
| C2—C1—H1 | 109.1 | C13—C12—H12 | 119.3 |
| C8—C1—H1 | 109.1 | C12—C13—H13 | 120.2 |
| C9—C1—H1 | 109.1 | C14—C13—H13 | 120.2 |
| C1—C2—H2 | 107.6 | C14—C15—H15 | 120.3 |
| C3—C2—H2 | 107.6 | C16—C15—H15 | 120.3 |
| C7—C2—H2 | 107.6 | C11—C16—H16 | 119.1 |
| C2—C3—H31 | 108.8 | C15—C16—H16 | 119.1 |
| O2—N1—C8—C1 | 64.7 (4) | C3—C4—C5—C6 | −52.9 (5) |
| O3—N1—C8—C1 | −112.9 (3) | C4—C5—C6—C7 | 52.5 (5) |
| C2—C1—C8—N1 | −179.0 (2) | C5—C6—C7—O1 | 118.3 (4) |
| C8—C1—C2—C3 | −177.3 (3) | C5—C6—C7—C2 | −58.0 (4) |
| C8—C1—C2—C7 | 61.1 (3) | C1—C9—C10—C11 | 175.2 (3) |
| C2—C1—C9—C10 | 126.2 (4) | C9—C10—C11—C12 | −7.3 (6) |
| C9—C1—C2—C3 | −57.3 (4) | C9—C10—C11—C16 | 173.2 (4) |
| C9—C1—C2—C7 | −178.8 (2) | C10—C11—C12—C13 | −179.8 (4) |
| C8—C1—C9—C10 | −112.8 (4) | C10—C11—C16—C15 | 179.0 (4) |
| C9—C1—C8—N1 | 59.2 (3) | C12—C11—C16—C15 | −0.6 (6) |
| C1—C2—C3—C4 | 176.8 (3) | C16—C11—C12—C13 | −0.2 (6) |
| C1—C2—C7—O1 | 7.5 (5) | C11—C12—C13—C14 | 0.8 (7) |
| C1—C2—C7—C6 | −176.2 (3) | C12—C13—C14—Cl1 | 179.0 (3) |
| C3—C2—C7—O1 | −117.6 (4) | C12—C13—C14—C15 | −0.5 (7) |
| C3—C2—C7—C6 | 58.7 (4) | Cl1—C14—C15—C16 | −179.8 (3) |
| C7—C2—C3—C4 | −56.6 (4) | C13—C14—C15—C16 | −0.3 (6) |
| C2—C3—C4—C5 | 56.4 (4) | C14—C15—C16—C11 | 0.8 (7) |
Hydrogen-bond geometry (Å, °)
| D—H···A | D—H | H···A | D···A | D—H···A |
| C8—H81···O1 | 0.97 | 2.37 | 3.020 (4) | 124 |
Footnotes
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BX2224).
References
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Associated Data
This section collects any data citations, data availability statements, or supplementary materials included in this article.
Supplementary Materials
Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536809029213/bx2224sup1.cif
Structure factors: contains datablocks I. DOI: 10.1107/S1600536809029213/bx2224Isup2.hkl
Additional supplementary materials: crystallographic information; 3D view; checkCIF report

