organic compounds
of 2-amino-4-(4-chlorophenyl)-1-(4-methylphenyl)-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carbonitrile
aChemistry and Environmental Division, Manchester Metropolitan University, Manchester M1 5GD, England, bChemistry Department, Faculty of Science, Minia University, 61519 El-Minia, Egypt, cDepartment of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey, dDepartment of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA, eChemistry Department, Faculty of Science, Sohag University, 82524 Sohag, Egypt, and fKirkuk University, College of Science, Department of Chemistry, Kirkuk, Iraq
*Correspondence e-mail: shaabankamel@yahoo.com
In the title compound, C23H20ClN3O, each of the cyclohexene and 1,4-dihydropyridine rings of the 1,4,5,6,7,8-hexahydroquinoline ring system adopts a twisted-boat conformation. The dihedral angle between the two benzene rings is 11.52 (7)°. In the crystal, molecules are linked through a pair of amino–nitrile N—H⋯N hydrogen bonds, forming inversion dimers. These assemble into a three-dimensional network via C—H⋯O and C—H⋯π interactions.
Keywords: crystal structure; dihydropyridines; annelated dihydropyridines; hydrogen bonding; inversion dimers.
CCDC reference: 1436038
1. Related literature
For the synthesis and pharmaceutical applications of dihydropyridines, see: Kumar & Maurya (2007); Kendre et al. (2008); Heydari et al. (2009).
2. Experimental
2.1. Crystal data
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2.3. Refinement
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Data collection: CrysAlis PRO (Agilent, 2014); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).
Supporting information
CCDC reference: 1436038
https://doi.org/10.1107/S2056989015021313/tk5407sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015021313/tk5407Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989015021313/tk5407Isup3.cml
To a solution of 1.3-cyclohexanedione (3.36 g, 0.03 mol) in 40 ml ethanol, p-toluidine (3.21 g, 0.03 mol) and catalytic a amount of triethylamine were added. The mixture was heated under reflux for 3 h. (4-Chlorobenzylidene)malononitrile (5.68 g, 0.03 mol) was added to the reaction mixture and refluxed for another 3 h. The separated solid was filtered off while hot, dried and crystallized from DMF as colourless crystals. Yield: 49.7%; m.p. 573 K, IR (λmax, cm-1): 3472, 3325 (NH2), 3209, 3032 (CHarom.), 2972–2879 (CHaliph.), 2177 (C≡N), 1631 (C=O); 1H-NMR (DMSO-d6), δ ppm: 7.39–7.29 (m, 8H, CHarom.), 5.32 (s, 2H, NH2, masked by D2O), 4.51 (s, 1H, CH), 2.4 (s, 3H, CH3), 2.23–2.19 (t, 2H, CH2—C=O), 1.93–1.81 (t, 2H, CH2—C=C), 1.67–1.62 (m, 2H, CH2-CH2-CH2); 13C-NMR (DMSO-d6), δ ppm: 195.45, 153.14, 151.70, 146.07, 139.86, 133.96, 131.26, 131.03, 130.10, 129.13, 128.79, 121.78, 112.72, 60.26, 36.45, 36.21, 28.23, 21.22, 21.06.
All H atoms were placed in calculated positions with N2—H1N = 0.90 Å, N2—H2N = 0.91 Å, and C—H = 0.93 - 1.04 Å, and refined as riding with Uiso(H) = 1.2 or 1.5Ueq(C, N).
Dihydropiridines (DHP's) are a significant class of heterocyclic molecules due to their important biological activities (Kumar & Maurya, 2007). Dihydropyridine drugs, such as nifedipine, nicardipine and amlodipine are well known as cardiovascular agents for the treatment of hypertension (Kendre et al., 2008), calcium channel modulators and for cardiovascular disease treatment (Heydari et al., 2009). In this context, we report here the synthesis and
of the title compound.In the title compound (Fig. 1), the cyclohexene (C1–C6) and 1,4-dihydropyridine (N1/C5–C9) rings of the 1,4,5,6,7,8-hexahydroquinoline ring system (N1/C1–C9) each adopt a twisted-boat conformation (the puckering parameters are QT = 0.4813 (16) Å, θ = 123.31 (18)°, φ = 283.9 (2)° and QT = 0.2182 (14) Å, θ = 103.7 (4)°, φ = 353.5 (4)°, respectively). The dihedral angle between the methyl- and chloro-benzene rings is 11.52 (7)°.
In the crystal, a pair of N—H···N intermolecular hydrogen bonds connects two molecules by an R22(12) ring motif (Table 1), forming a centrosymmetric dimer (Fig. 2). Weak C—H···O and C—H···π interactions connect the dimers to each other, forming a three-dimensional network.
For the synthesis and pharmaceutical applications of dihydropyridines, see: Kumar & Maurya (2007); Kendre et al. (2008); Heydari et al. (2009).
Data collection: CrysAlis PRO (Agilent, 2014); cell
CrysAlis PRO (Agilent, 2014); data reduction: CrysAlis PRO (Agilent, 2014); program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. Molecular structure of the title compound with displacement ellipsoids drawn at the 30% probability level. | |
Fig. 2. View of the dimers formed by N—H···N hydrogen bonds down the b axis. |
C23H20ClN3O | F(000) = 816 |
Mr = 389.87 | Dx = 1.337 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 4336 reflections |
a = 8.7759 (3) Å | θ = 3.5–32.1° |
b = 10.6399 (3) Å | µ = 0.22 mm−1 |
c = 20.7929 (7) Å | T = 293 K |
β = 93.842 (3)° | Irregular, colourless |
V = 1937.17 (11) Å3 | 0.46 × 0.42 × 0.38 mm |
Z = 4 |
Agilent Xcalibur Eos Gemini diffractometer | 6453 independent reflections |
Radiation source: Enhance (Mo) X-ray Source | 4853 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
Detector resolution: 16.0416 pixels mm-1 | θmax = 32.8°, θmin = 3.5° |
ω scans | h = −13→12 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2014) | k = −15→13 |
Tmin = 0.841, Tmax = 1.000 | l = −31→29 |
15538 measured reflections |
Refinement on F2 | 0 restraints |
Least-squares matrix: full | Hydrogen site location: mixed |
R[F2 > 2σ(F2)] = 0.053 | H-atom parameters constrained |
wR(F2) = 0.144 | w = 1/[σ2(Fo2) + (0.0563P)2 + 0.8789P] where P = (Fo2 + 2Fc2)/3 |
S = 1.04 | (Δ/σ)max < 0.001 |
6453 reflections | Δρmax = 0.50 e Å−3 |
254 parameters | Δρmin = −0.48 e Å−3 |
C23H20ClN3O | V = 1937.17 (11) Å3 |
Mr = 389.87 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.7759 (3) Å | µ = 0.22 mm−1 |
b = 10.6399 (3) Å | T = 293 K |
c = 20.7929 (7) Å | 0.46 × 0.42 × 0.38 mm |
β = 93.842 (3)° |
Agilent Xcalibur Eos Gemini diffractometer | 6453 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2014) | 4853 reflections with I > 2σ(I) |
Tmin = 0.841, Tmax = 1.000 | Rint = 0.027 |
15538 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 0 restraints |
wR(F2) = 0.144 | H-atom parameters constrained |
S = 1.04 | Δρmax = 0.50 e Å−3 |
6453 reflections | Δρmin = −0.48 e Å−3 |
254 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
Refinement. Refinement on F2 for ALL reflections except those flagged by the user for potential systematic errors. Weighted R-factors wR and all goodnesses of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The observed criterion of F2 > σ(F2) is used only for calculating -R-factor-obs 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 | −0.06881 (6) | 1.08244 (7) | 0.09288 (3) | 0.0623 (2) | |
O1 | 0.50713 (13) | 1.30415 (10) | 0.28910 (6) | 0.0326 (3) | |
N1 | 0.45035 (14) | 0.91350 (11) | 0.39374 (6) | 0.0244 (3) | |
N2 | 0.26036 (17) | 0.87555 (14) | 0.46421 (7) | 0.0396 (4) | |
N3 | −0.00227 (17) | 1.12750 (16) | 0.44726 (8) | 0.0423 (5) | |
C1 | 0.56260 (16) | 1.20335 (12) | 0.30796 (7) | 0.0232 (3) | |
C2 | 0.72897 (16) | 1.17417 (14) | 0.30258 (8) | 0.0276 (4) | |
C3 | 0.75310 (17) | 1.03530 (14) | 0.29019 (8) | 0.0291 (4) | |
C4 | 0.69031 (16) | 0.95720 (14) | 0.34366 (8) | 0.0282 (4) | |
C5 | 0.53218 (15) | 0.99782 (12) | 0.35801 (6) | 0.0213 (3) | |
C6 | 0.47011 (15) | 1.10911 (12) | 0.33829 (6) | 0.0206 (3) | |
C7 | 0.30491 (15) | 1.14205 (12) | 0.34566 (6) | 0.0212 (3) | |
C8 | 0.24453 (15) | 1.06023 (13) | 0.39764 (6) | 0.0221 (3) | |
C9 | 0.31330 (16) | 0.95091 (13) | 0.41841 (7) | 0.0236 (3) | |
C10 | 0.50999 (16) | 0.78952 (12) | 0.40891 (7) | 0.0223 (3) | |
C11 | 0.61730 (19) | 0.77207 (14) | 0.45979 (8) | 0.0315 (4) | |
C12 | 0.67482 (19) | 0.65278 (16) | 0.47317 (8) | 0.0340 (4) | |
C13 | 0.62493 (17) | 0.54973 (14) | 0.43663 (7) | 0.0268 (4) | |
C14 | 0.51702 (19) | 0.56892 (14) | 0.38571 (7) | 0.0296 (4) | |
C15 | 0.45943 (17) | 0.68829 (14) | 0.37163 (7) | 0.0270 (4) | |
C16 | 0.6846 (2) | 0.42010 (16) | 0.45269 (8) | 0.0369 (5) | |
C17 | 0.10810 (17) | 1.09671 (14) | 0.42500 (7) | 0.0267 (4) | |
C18 | 0.21047 (15) | 1.12918 (13) | 0.28167 (7) | 0.0215 (3) | |
C19 | 0.12277 (17) | 1.22793 (14) | 0.25608 (8) | 0.0290 (4) | |
C20 | 0.03681 (18) | 1.21482 (16) | 0.19772 (8) | 0.0351 (4) | |
C21 | 0.03801 (18) | 1.10148 (18) | 0.16578 (8) | 0.0341 (5) | |
C22 | 0.12380 (19) | 1.00150 (17) | 0.19015 (8) | 0.0334 (4) | |
C23 | 0.21025 (17) | 1.01654 (14) | 0.24800 (7) | 0.0284 (4) | |
H1N | 0.31260 | 0.80530 | 0.47550 | 0.0480* | |
H2A | 0.78620 | 1.19830 | 0.34220 | 0.0330* | |
H2B | 0.76720 | 1.22270 | 0.26760 | 0.0330* | |
H2N | 0.17130 | 0.89510 | 0.48190 | 0.0480* | |
H3A | 0.86130 | 1.01850 | 0.28810 | 0.0350* | |
H3B | 0.70190 | 1.01210 | 0.24910 | 0.0350* | |
H4A | 0.68820 | 0.86940 | 0.33100 | 0.0340* | |
H4B | 0.75760 | 0.96510 | 0.38240 | 0.0340* | |
H7 | 0.29660 | 1.23540 | 0.36000 | 0.0250* | |
H11 | 0.65090 | 0.84010 | 0.48500 | 0.0380* | |
H12 | 0.74800 | 0.64170 | 0.50720 | 0.0410* | |
H14 | 0.48270 | 0.50090 | 0.36060 | 0.0350* | |
H15 | 0.38730 | 0.70000 | 0.33730 | 0.0320* | |
H16A | 0.63750 | 0.36050 | 0.42290 | 0.0550* | |
H16B | 0.66120 | 0.39850 | 0.49580 | 0.0550* | |
H16C | 0.79330 | 0.41860 | 0.44960 | 0.0550* | |
H19 | 0.12140 | 1.30390 | 0.27820 | 0.0350* | |
H20 | −0.02070 | 1.28170 | 0.18050 | 0.0420* | |
H22 | 0.12370 | 0.92540 | 0.16820 | 0.0400* | |
H23 | 0.26920 | 0.94990 | 0.26450 | 0.0340* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cl1 | 0.0483 (3) | 0.0933 (5) | 0.0424 (3) | 0.0171 (3) | −0.0178 (2) | −0.0039 (3) |
O1 | 0.0312 (6) | 0.0215 (5) | 0.0457 (6) | −0.0005 (4) | 0.0073 (5) | 0.0058 (4) |
N1 | 0.0234 (6) | 0.0192 (5) | 0.0318 (6) | 0.0035 (4) | 0.0106 (4) | 0.0033 (4) |
N2 | 0.0389 (8) | 0.0354 (7) | 0.0476 (8) | 0.0117 (6) | 0.0251 (6) | 0.0171 (6) |
N3 | 0.0319 (7) | 0.0531 (9) | 0.0439 (8) | 0.0113 (7) | 0.0168 (6) | 0.0056 (7) |
C1 | 0.0228 (6) | 0.0203 (6) | 0.0267 (6) | −0.0028 (5) | 0.0036 (5) | −0.0022 (5) |
C2 | 0.0213 (6) | 0.0253 (6) | 0.0370 (8) | −0.0037 (5) | 0.0069 (5) | 0.0027 (6) |
C3 | 0.0231 (7) | 0.0277 (7) | 0.0377 (8) | 0.0004 (5) | 0.0121 (6) | 0.0016 (6) |
C4 | 0.0222 (6) | 0.0250 (6) | 0.0383 (8) | 0.0032 (5) | 0.0095 (5) | 0.0040 (6) |
C5 | 0.0206 (6) | 0.0200 (6) | 0.0238 (6) | −0.0014 (5) | 0.0058 (5) | −0.0011 (5) |
C6 | 0.0190 (6) | 0.0192 (6) | 0.0242 (6) | −0.0001 (4) | 0.0050 (4) | −0.0012 (5) |
C7 | 0.0199 (6) | 0.0179 (5) | 0.0264 (6) | 0.0012 (5) | 0.0068 (5) | −0.0016 (5) |
C8 | 0.0210 (6) | 0.0237 (6) | 0.0224 (6) | 0.0007 (5) | 0.0065 (5) | −0.0017 (5) |
C9 | 0.0229 (6) | 0.0235 (6) | 0.0253 (6) | 0.0004 (5) | 0.0084 (5) | 0.0001 (5) |
C10 | 0.0235 (6) | 0.0197 (6) | 0.0242 (6) | 0.0023 (5) | 0.0063 (5) | 0.0025 (5) |
C11 | 0.0362 (8) | 0.0255 (7) | 0.0319 (7) | 0.0001 (6) | −0.0049 (6) | −0.0045 (6) |
C12 | 0.0364 (8) | 0.0326 (8) | 0.0315 (7) | 0.0062 (6) | −0.0081 (6) | 0.0014 (6) |
C13 | 0.0302 (7) | 0.0257 (6) | 0.0249 (6) | 0.0060 (5) | 0.0054 (5) | 0.0042 (5) |
C14 | 0.0371 (8) | 0.0230 (6) | 0.0282 (7) | 0.0024 (6) | −0.0007 (6) | −0.0032 (5) |
C15 | 0.0296 (7) | 0.0259 (7) | 0.0250 (6) | 0.0034 (5) | −0.0016 (5) | −0.0003 (5) |
C16 | 0.0449 (10) | 0.0304 (8) | 0.0357 (8) | 0.0127 (7) | 0.0049 (7) | 0.0060 (6) |
C17 | 0.0242 (7) | 0.0304 (7) | 0.0260 (6) | 0.0031 (5) | 0.0054 (5) | 0.0021 (5) |
C18 | 0.0184 (6) | 0.0213 (6) | 0.0255 (6) | 0.0017 (5) | 0.0063 (5) | 0.0028 (5) |
C19 | 0.0257 (7) | 0.0232 (6) | 0.0385 (8) | 0.0037 (5) | 0.0059 (6) | 0.0060 (6) |
C20 | 0.0265 (7) | 0.0384 (8) | 0.0406 (8) | 0.0081 (6) | 0.0030 (6) | 0.0150 (7) |
C21 | 0.0234 (7) | 0.0500 (10) | 0.0287 (7) | 0.0041 (7) | 0.0007 (5) | 0.0050 (7) |
C22 | 0.0323 (8) | 0.0378 (8) | 0.0298 (7) | 0.0057 (6) | 0.0006 (6) | −0.0057 (6) |
C23 | 0.0307 (7) | 0.0267 (7) | 0.0277 (7) | 0.0074 (6) | 0.0004 (5) | −0.0005 (5) |
Cl1—C21 | 1.7399 (18) | C14—C15 | 1.391 (2) |
O1—C1 | 1.2310 (17) | C18—C23 | 1.388 (2) |
N1—C5 | 1.3943 (18) | C18—C19 | 1.387 (2) |
N1—C9 | 1.3967 (19) | C19—C20 | 1.392 (2) |
N1—C10 | 1.4462 (18) | C20—C21 | 1.377 (3) |
N2—C9 | 1.351 (2) | C21—C22 | 1.380 (3) |
N3—C17 | 1.149 (2) | C22—C23 | 1.388 (2) |
C1—C2 | 1.504 (2) | C2—H2A | 0.9700 |
C1—C6 | 1.4596 (19) | C2—H2B | 0.9700 |
C2—C3 | 1.517 (2) | C3—H3A | 0.9700 |
N2—H2N | 0.9100 | C3—H3B | 0.9700 |
N2—H1N | 0.9000 | C4—H4A | 0.9700 |
C3—C4 | 1.521 (2) | C4—H4B | 0.9700 |
C4—C5 | 1.5024 (19) | C7—H7 | 1.0400 |
C5—C6 | 1.3554 (18) | C11—H11 | 0.9300 |
C6—C7 | 1.5093 (19) | C12—H12 | 0.9300 |
C7—C18 | 1.5259 (19) | C14—H14 | 0.9300 |
C7—C8 | 1.5112 (18) | C15—H15 | 0.9300 |
C8—C17 | 1.414 (2) | C16—H16A | 0.9600 |
C8—C9 | 1.3670 (19) | C16—H16B | 0.9600 |
C10—C15 | 1.383 (2) | C16—H16C | 0.9600 |
C10—C11 | 1.381 (2) | C19—H19 | 0.9300 |
C11—C12 | 1.387 (2) | C20—H20 | 0.9300 |
C12—C13 | 1.388 (2) | C22—H22 | 0.9300 |
C13—C16 | 1.505 (2) | C23—H23 | 0.9300 |
C13—C14 | 1.388 (2) | ||
C5—N1—C9 | 119.95 (11) | Cl1—C21—C20 | 120.07 (14) |
C5—N1—C10 | 120.75 (12) | C20—C21—C22 | 121.31 (15) |
C9—N1—C10 | 119.20 (12) | C21—C22—C23 | 118.85 (16) |
O1—C1—C2 | 121.42 (13) | C18—C23—C22 | 121.27 (14) |
O1—C1—C6 | 121.11 (13) | C1—C2—H2A | 109.00 |
C2—C1—C6 | 117.45 (12) | C1—C2—H2B | 109.00 |
C1—C2—C3 | 111.15 (12) | C3—C2—H2A | 109.00 |
C9—N2—H1N | 119.00 | C3—C2—H2B | 109.00 |
C9—N2—H2N | 120.00 | H2A—C2—H2B | 108.00 |
H1N—N2—H2N | 121.00 | C2—C3—H3A | 110.00 |
C2—C3—C4 | 110.27 (13) | C2—C3—H3B | 110.00 |
C3—C4—C5 | 111.89 (12) | C4—C3—H3A | 110.00 |
N1—C5—C6 | 120.83 (12) | C4—C3—H3B | 110.00 |
N1—C5—C4 | 115.87 (12) | H3A—C3—H3B | 108.00 |
C4—C5—C6 | 123.31 (12) | C3—C4—H4A | 109.00 |
C1—C6—C5 | 120.47 (12) | C3—C4—H4B | 109.00 |
C1—C6—C7 | 116.75 (11) | C5—C4—H4A | 109.00 |
C5—C6—C7 | 122.78 (12) | C5—C4—H4B | 109.00 |
C6—C7—C18 | 111.10 (10) | H4A—C4—H4B | 108.00 |
C8—C7—C18 | 112.08 (11) | C6—C7—H7 | 110.00 |
C6—C7—C8 | 108.91 (11) | C8—C7—H7 | 108.00 |
C7—C8—C17 | 118.46 (12) | C18—C7—H7 | 107.00 |
C7—C8—C9 | 123.20 (12) | C10—C11—H11 | 120.00 |
C9—C8—C17 | 118.31 (13) | C12—C11—H11 | 120.00 |
N1—C9—N2 | 115.79 (13) | C11—C12—H12 | 119.00 |
N1—C9—C8 | 119.95 (13) | C13—C12—H12 | 119.00 |
N2—C9—C8 | 124.22 (13) | C13—C14—H14 | 119.00 |
C11—C10—C15 | 120.10 (13) | C15—C14—H14 | 120.00 |
N1—C10—C11 | 120.53 (12) | C10—C15—H15 | 120.00 |
N1—C10—C15 | 119.37 (13) | C14—C15—H15 | 120.00 |
C10—C11—C12 | 119.80 (14) | C13—C16—H16A | 109.00 |
C11—C12—C13 | 121.05 (15) | C13—C16—H16B | 109.00 |
C12—C13—C14 | 118.40 (14) | C13—C16—H16C | 109.00 |
C14—C13—C16 | 120.92 (14) | H16A—C16—H16B | 110.00 |
C12—C13—C16 | 120.68 (14) | H16A—C16—H16C | 109.00 |
C13—C14—C15 | 120.99 (14) | H16B—C16—H16C | 109.00 |
C10—C15—C14 | 119.66 (13) | C18—C19—H19 | 120.00 |
N3—C17—C8 | 179.36 (17) | C20—C19—H19 | 120.00 |
C7—C18—C19 | 121.43 (13) | C19—C20—H20 | 120.00 |
C7—C18—C23 | 119.98 (12) | C21—C20—H20 | 120.00 |
C19—C18—C23 | 118.59 (14) | C21—C22—H22 | 121.00 |
C18—C19—C20 | 120.84 (14) | C23—C22—H22 | 121.00 |
C19—C20—C21 | 119.14 (15) | C18—C23—H23 | 119.00 |
Cl1—C21—C22 | 118.62 (14) | C22—C23—H23 | 119.00 |
C5—N1—C10—C11 | 81.13 (18) | C6—C7—C8—C17 | 162.97 (12) |
C9—N1—C10—C11 | −95.26 (17) | C18—C7—C8—C9 | 104.62 (15) |
C5—N1—C10—C15 | −98.38 (16) | C18—C7—C8—C17 | −73.69 (15) |
C5—N1—C9—N2 | −165.14 (13) | C6—C7—C18—C23 | 55.07 (16) |
C10—N1—C9—N2 | 11.28 (19) | C8—C7—C18—C19 | 112.49 (15) |
C5—N1—C9—C8 | 12.5 (2) | C8—C7—C18—C23 | −67.03 (16) |
C10—N1—C9—C8 | −171.05 (13) | C6—C7—C18—C19 | −125.41 (14) |
C9—N1—C5—C4 | 169.55 (13) | C7—C8—C9—N1 | 3.4 (2) |
C10—N1—C5—C4 | −6.82 (18) | C17—C8—C9—N1 | −178.31 (13) |
C9—N1—C5—C6 | −10.23 (19) | C17—C8—C9—N2 | −0.8 (2) |
C10—N1—C5—C6 | 173.41 (12) | C7—C8—C9—N2 | −179.15 (13) |
C9—N1—C10—C15 | 85.23 (17) | N1—C10—C11—C12 | −179.16 (14) |
C6—C1—C2—C3 | 35.47 (18) | C15—C10—C11—C12 | 0.4 (2) |
O1—C1—C6—C5 | 179.08 (13) | N1—C10—C15—C14 | 179.60 (13) |
C2—C1—C6—C7 | 177.66 (12) | C11—C10—C15—C14 | 0.1 (2) |
O1—C1—C2—C3 | −146.41 (15) | C10—C11—C12—C13 | −0.8 (2) |
C2—C1—C6—C5 | −2.80 (19) | C11—C12—C13—C14 | 0.7 (2) |
O1—C1—C6—C7 | −0.5 (2) | C11—C12—C13—C16 | −178.22 (15) |
C1—C2—C3—C4 | −57.68 (17) | C12—C13—C14—C15 | −0.3 (2) |
C2—C3—C4—C5 | 47.83 (16) | C16—C13—C14—C15 | 178.66 (14) |
C3—C4—C5—C6 | −16.04 (19) | C13—C14—C15—C10 | −0.1 (2) |
C3—C4—C5—N1 | 164.19 (12) | C7—C18—C19—C20 | −179.83 (14) |
N1—C5—C6—C1 | 172.36 (12) | C23—C18—C19—C20 | −0.3 (2) |
N1—C5—C6—C7 | −8.13 (19) | C7—C18—C23—C22 | 179.08 (14) |
C4—C5—C6—C7 | 172.11 (12) | C19—C18—C23—C22 | −0.5 (2) |
C4—C5—C6—C1 | −7.4 (2) | C18—C19—C20—C21 | 0.9 (2) |
C1—C6—C7—C8 | −159.39 (11) | C19—C20—C21—Cl1 | 179.82 (13) |
C1—C6—C7—C18 | 76.69 (14) | C19—C20—C21—C22 | −0.7 (2) |
C5—C6—C7—C8 | 21.09 (17) | Cl1—C21—C22—C23 | 179.45 (12) |
C5—C6—C7—C18 | −102.84 (14) | C20—C21—C22—C23 | −0.1 (2) |
C6—C7—C8—C9 | −18.72 (17) | C21—C22—C23—C18 | 0.6 (2) |
Cg3 and Cg4 are the centroids of the methyl- and chloro-benzene rings (C10–C15 and C18–C23), respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···N3i | 0.91 | 2.17 | 3.013 (2) | 153 |
C14—H14···O1ii | 0.93 | 2.58 | 3.4577 (19) | 156 |
C3—H3A···Cg4iii | 0.97 | 2.93 | 3.7210 (16) | 139 |
C16—H16B···Cg3iv | 0.96 | 2.81 | 3.6464 (18) | 146 |
Symmetry codes: (i) −x, −y+2, −z+1; (ii) x, y−1, z; (iii) x+1, y, z; (iv) −x+1, −y+1, −z+1. |
Cg3 and Cg4 are the centroids of the methyl- and chloro-benzene rings (C10–C15 and C18–C23), respectively. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2N···N3i | 0.91 | 2.17 | 3.013 (2) | 153 |
C14—H14···O1ii | 0.93 | 2.58 | 3.4577 (19) | 156 |
C3—H3A···Cg4iii | 0.97 | 2.93 | 3.7210 (16) | 139 |
C16—H16B···Cg3iv | 0.96 | 2.81 | 3.6464 (18) | 146 |
Symmetry codes: (i) −x, −y+2, −z+1; (ii) x, y−1, z; (iii) x+1, y, z; (iv) −x+1, −y+1, −z+1. |
Acknowledgements
JPJ acknowledges the NSF–MRI program (grant No. CHE-1039027) for funds to purchase the X-ray diffractometer.
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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.
Dihydropiridines (DHP's) are a significant class of heterocyclic molecules due to their important biological activities (Kumar & Maurya, 2007). Dihydropyridine drugs, such as nifedipine, nicardipine and amlodipine are well known as cardiovascular agents for the treatment of hypertension (Kendre et al., 2008), calcium channel modulators and for cardiovascular disease treatment (Heydari et al., 2009). In this context, we report here the synthesis and crystal structure of the title compound.
In the title compound (Fig. 1), the cyclohexene (C1–C6) and 1,4-dihydropyridine (N1/C5–C9) rings of the 1,4,5,6,7,8-hexahydroquinoline ring system (N1/C1–C9) each adopt a twisted-boat conformation (the puckering parameters are QT = 0.4813 (16) Å, θ = 123.31 (18)°, φ = 283.9 (2)° and QT = 0.2182 (14) Å, θ = 103.7 (4)°, φ = 353.5 (4)°, respectively). The dihedral angle between the methyl- and chloro-benzene rings is 11.52 (7)°.
In the crystal, a pair of N—H···N intermolecular hydrogen bonds connects two molecules by an R22(12) ring motif (Table 1), forming a centrosymmetric dimer (Fig. 2). Weak C—H···O and C—H···π interactions connect the dimers to each other, forming a three-dimensional network.