organic compounds
2-Amino-4-(3,4-dimethoxyphenyl)-5,6-dihydrobenzo[h]quinoline-3-carbonitrile–3-amino-1-(3,4-dimethoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile (1/19)
aChemistry Department, Faculty of Science, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia, bCenter of Excellence for Advanced Materials Research, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia, and cDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
*Correspondence e-mail: seikweng@um.edu.my
The h]quinoline-3-carbonitrile and 3-amino-1-(3,4-dimethoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile, 0.05C22H19N3O2·0.95C24H19N3O2, has the atoms of the fused-ring system and those of the amino, cyano and dimethoxyphenyl substitutents overlapped. The fused-ring system is buckled owing to the ethylene linkage in the central ring with the two flanking aromatic rings being twisted by 31.9 (1)°. The ring of the dimethoxyphenyl substituent is twisted by 72.4 (1)° relative to the amino- and cyano-bearing aromatic ring. In the crystal, molecules are linked by duplex amine N—H⋯O(methoxy) hydrogen bonds in a cyclic association [graph-set R22(7)], generating a helical chain structure extending along [201].
of the 1:19 title of 2-amino-4-(3,4-dimethoxyphenyl)-5,6-dihydrobenzo[Related literature
For a similar et al. (2011). For graph-set analysis, see: Etter et al. (1990).
see: AsiriExperimental
Crystal data
|
Refinement
|
Data collection: CrysAlis PRO (Agilent, 2010); cell CrysAlis PRO; data reduction: CrysAlis PRO; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).
Supporting information
10.1107/S1600536811040517/zs2146sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536811040517/zs2146Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536811040517/zs2146Isup3.cml
A mixture of 3,4-dimethoxybenzaldehyde (1.66 g,10 mmol), α-tetralone (1.46 g, 10 mmol), ethyl cyanoacetate (1.13 g, 10 mmol) and ammonium acetate (6.16 g, 80 mmol) in absolute ethanol (50 ml) was refluxed for 6 h. The mixture was allowed to cool and the precipitate that formed was filtered, washed with water, dried and recrystallized from DMF.
Carbon-bound H-atoms were placed in calculated positions [C–H = 0.95–0.99 Å; Uiso(H) 1.2–1.5Ueq(C)] and were included in the
in the riding model approximation. The amino H-atoms were located in a difference Fourier map and were refined without restraint, including their temperature isotropic displacement parameters. The compound is a of 2-amino-4-(3,4-dimethoxy)-5,6-dihydrobenzoquinoline-3-carbonitrile (C22H19N3O2) and 3-amino-1-(3,4-dimethoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile (C24H19N3O2). The first component is a dihydrobenzoquinoline and has only one cyano substituent. The second component is a dihydrophenanthrene with two cyano substituents. The two-coordinate N atom of the first molecule occupies the same site as the three-coordinate C atom of the second molecule. As the occupancy refined to an almost 1:19 ratio, the occupancy was then fixed as this ratio.Data collection: CrysAlis PRO (Agilent, 2010); cell
CrysAlis PRO (Agilent, 2010); data reduction: CrysAlis PRO (Agilent, 2010); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001); software used to prepare material for publication: publCIF (Westrip, 2010).0.05C22H19N3O2·0.95C24H19N3O2 | F(000) = 797.6 |
Mr = 380.22 | Dx = 1.357 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2ybc | Cell parameters from 3220 reflections |
a = 8.9347 (3) Å | θ = 2.3–29.2° |
b = 14.4915 (5) Å | µ = 0.09 mm−1 |
c = 14.7818 (6) Å | T = 100 K |
β = 103.446 (4)° | Block, orange |
V = 1861.45 (12) Å3 | 0.30 × 0.25 × 0.20 mm |
Z = 4 |
Agilent SuperNova Dual diffractometer with an Atlas detector | 4160 independent reflections |
Radiation source: SuperNova (Mo) X-ray Source | 3146 reflections with I > 2σ(I) |
Mirror monochromator | Rint = 0.031 |
Detector resolution: 10.4041 pixels mm-1 | θmax = 27.5°, θmin = 2.3° |
ω scans | h = −11→8 |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | k = −18→17 |
Tmin = 0.974, Tmax = 0.983 | l = −19→17 |
9240 measured reflections |
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)] = 0.049 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.124 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | w = 1/[σ2(Fo2) + (0.0502P)2 + 0.6446P] where P = (Fo2 + 2Fc2)/3 |
4160 reflections | (Δ/σ)max = 0.001 |
270 parameters | Δρmax = 0.30 e Å−3 |
0 restraints | Δρmin = −0.24 e Å−3 |
0.05C22H19N3O2·0.95C24H19N3O2 | V = 1861.45 (12) Å3 |
Mr = 380.22 | Z = 4 |
Monoclinic, P21/c | Mo Kα radiation |
a = 8.9347 (3) Å | µ = 0.09 mm−1 |
b = 14.4915 (5) Å | T = 100 K |
c = 14.7818 (6) Å | 0.30 × 0.25 × 0.20 mm |
β = 103.446 (4)° |
Agilent SuperNova Dual diffractometer with an Atlas detector | 4160 independent reflections |
Absorption correction: multi-scan (CrysAlis PRO; Agilent, 2010) | 3146 reflections with I > 2σ(I) |
Tmin = 0.974, Tmax = 0.983 | Rint = 0.031 |
9240 measured reflections |
R[F2 > 2σ(F2)] = 0.049 | 0 restraints |
wR(F2) = 0.124 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.04 | Δρmax = 0.30 e Å−3 |
4160 reflections | Δρmin = −0.24 e Å−3 |
270 parameters |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
O1 | 0.30588 (13) | 0.63995 (9) | 0.10804 (8) | 0.0271 (3) | |
O2 | 0.07648 (12) | 0.69798 (8) | 0.17421 (8) | 0.0220 (3) | |
N1 | 0.94620 (18) | 0.95400 (11) | 0.33260 (11) | 0.0197 (3) | 0.05 |
C1' | 0.94620 (18) | 0.95400 (11) | 0.33260 (11) | 0.0197 (3) | 0.95 |
N2 | 1.21403 (18) | 1.02734 (11) | 0.39566 (11) | 0.0279 (4) | 0.95 |
N3 | 1.00292 (18) | 0.87635 (11) | 0.48043 (11) | 0.0271 (4) | |
H1 | 1.104 (3) | 0.9012 (16) | 0.4948 (16) | 0.053 (7)* | |
H2 | 0.973 (2) | 0.8423 (15) | 0.5258 (15) | 0.035 (6)* | |
N4 | 0.68515 (17) | 0.74165 (11) | 0.49326 (11) | 0.0294 (4) | |
C1 | 0.84721 (19) | 0.97189 (11) | 0.24628 (11) | 0.0209 (4) | |
C2 | 0.8945 (2) | 1.02681 (12) | 0.17292 (12) | 0.0253 (4) | |
C3 | 1.0457 (2) | 1.02878 (13) | 0.16227 (13) | 0.0315 (4) | |
H3 | 1.1232 | 0.9947 | 0.2038 | 0.038* | |
C4 | 1.0837 (3) | 1.07998 (14) | 0.09164 (14) | 0.0374 (5) | |
H4 | 1.1867 | 1.0808 | 0.0847 | 0.045* | |
C5 | 0.9711 (3) | 1.12980 (14) | 0.03145 (14) | 0.0425 (5) | |
H5 | 0.9976 | 1.1660 | −0.0161 | 0.051* | |
C6 | 0.8200 (3) | 1.12739 (13) | 0.03999 (13) | 0.0382 (5) | |
H6 | 0.7435 | 1.1618 | −0.0019 | 0.046* | |
C7 | 0.7794 (2) | 1.07502 (12) | 0.10951 (12) | 0.0295 (4) | |
C8 | 0.6159 (2) | 1.06430 (13) | 0.11720 (13) | 0.0326 (4) | |
H8A | 0.5449 | 1.0839 | 0.0585 | 0.039* | |
H8B | 0.5970 | 1.1035 | 0.1682 | 0.039* | |
C9 | 0.5876 (2) | 0.96303 (13) | 0.13680 (12) | 0.0292 (4) | |
H9A | 0.4801 | 0.9547 | 0.1424 | 0.035* | |
H9B | 0.6036 | 0.9242 | 0.0848 | 0.035* | |
C10 | 0.69749 (19) | 0.93394 (12) | 0.22619 (12) | 0.0231 (4) | |
C11 | 0.65552 (18) | 0.87253 (11) | 0.28827 (11) | 0.0213 (4) | |
C12 | 0.75689 (18) | 0.85343 (11) | 0.37374 (11) | 0.0193 (3) | |
C13 | 0.90408 (18) | 0.89474 (11) | 0.39830 (11) | 0.0196 (3) | |
C14 | 1.0941 (2) | 0.99715 (12) | 0.36327 (12) | 0.0225 (4) | 0.95 |
C15 | 0.71436 (18) | 0.79079 (12) | 0.43878 (12) | 0.0224 (4) | |
C16 | 0.50312 (18) | 0.82492 (12) | 0.26343 (11) | 0.0215 (4) | |
C17 | 0.47860 (19) | 0.75520 (12) | 0.19617 (12) | 0.0224 (4) | |
H17 | 0.5599 | 0.7375 | 0.1683 | 0.027* | |
C18 | 0.33741 (18) | 0.71173 (11) | 0.16982 (11) | 0.0203 (4) | |
C19 | 0.21512 (18) | 0.74044 (11) | 0.20790 (11) | 0.0193 (3) | |
C20 | 0.2414 (2) | 0.80721 (12) | 0.27631 (12) | 0.0249 (4) | |
H20 | 0.1605 | 0.8251 | 0.3044 | 0.030* | |
C21 | 0.3855 (2) | 0.84870 (13) | 0.30454 (12) | 0.0262 (4) | |
H21 | 0.4026 | 0.8937 | 0.3526 | 0.031* | |
C22 | 0.4368 (2) | 0.59651 (14) | 0.08517 (15) | 0.0368 (5) | |
H22A | 0.4020 | 0.5462 | 0.0409 | 0.055* | |
H22B | 0.5043 | 0.5716 | 0.1418 | 0.055* | |
H22C | 0.4934 | 0.6420 | 0.0571 | 0.055* | |
C23 | −0.05031 (19) | 0.73108 (12) | 0.20937 (13) | 0.0260 (4) | |
H23A | −0.1430 | 0.6957 | 0.1814 | 0.039* | |
H23B | −0.0678 | 0.7965 | 0.1937 | 0.039* | |
H23C | −0.0268 | 0.7236 | 0.2771 | 0.039* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0180 (6) | 0.0316 (7) | 0.0312 (7) | 0.0003 (5) | 0.0050 (5) | −0.0126 (6) |
O2 | 0.0152 (6) | 0.0253 (6) | 0.0258 (6) | −0.0021 (5) | 0.0051 (5) | −0.0061 (5) |
N1 | 0.0175 (8) | 0.0197 (8) | 0.0218 (8) | −0.0008 (7) | 0.0042 (7) | −0.0027 (7) |
C1' | 0.0175 (8) | 0.0197 (8) | 0.0218 (8) | −0.0008 (7) | 0.0042 (7) | −0.0027 (7) |
N2 | 0.0214 (8) | 0.0270 (8) | 0.0354 (9) | −0.0022 (7) | 0.0065 (7) | 0.0011 (7) |
N3 | 0.0209 (8) | 0.0325 (9) | 0.0240 (8) | −0.0045 (7) | −0.0028 (6) | 0.0063 (7) |
N4 | 0.0257 (8) | 0.0309 (8) | 0.0315 (8) | −0.0031 (7) | 0.0065 (7) | 0.0030 (7) |
C1 | 0.0233 (8) | 0.0196 (8) | 0.0192 (8) | 0.0004 (7) | 0.0036 (7) | −0.0026 (7) |
C2 | 0.0347 (10) | 0.0209 (8) | 0.0199 (8) | −0.0056 (8) | 0.0056 (8) | −0.0035 (7) |
C3 | 0.0391 (11) | 0.0267 (10) | 0.0308 (10) | −0.0063 (8) | 0.0126 (9) | −0.0034 (8) |
C4 | 0.0523 (13) | 0.0317 (10) | 0.0342 (11) | −0.0115 (10) | 0.0219 (10) | −0.0042 (9) |
C5 | 0.0717 (16) | 0.0323 (11) | 0.0272 (10) | −0.0162 (11) | 0.0190 (11) | −0.0001 (9) |
C6 | 0.0593 (14) | 0.0284 (10) | 0.0228 (9) | −0.0058 (10) | 0.0013 (9) | 0.0015 (8) |
C7 | 0.0434 (11) | 0.0237 (9) | 0.0191 (9) | −0.0057 (8) | 0.0026 (8) | −0.0020 (7) |
C8 | 0.0400 (11) | 0.0293 (10) | 0.0217 (9) | 0.0011 (9) | −0.0065 (8) | 0.0023 (8) |
C9 | 0.0298 (10) | 0.0303 (10) | 0.0225 (9) | −0.0031 (8) | −0.0041 (8) | 0.0001 (8) |
C10 | 0.0217 (8) | 0.0244 (9) | 0.0205 (8) | −0.0004 (7) | −0.0006 (7) | −0.0016 (7) |
C11 | 0.0175 (8) | 0.0229 (8) | 0.0231 (8) | 0.0010 (7) | 0.0037 (7) | −0.0042 (7) |
C12 | 0.0174 (8) | 0.0204 (8) | 0.0205 (8) | −0.0001 (7) | 0.0051 (7) | −0.0015 (7) |
C13 | 0.0180 (8) | 0.0185 (8) | 0.0216 (8) | 0.0019 (7) | 0.0031 (7) | −0.0025 (7) |
C14 | 0.0246 (9) | 0.0218 (9) | 0.0218 (9) | 0.0016 (8) | 0.0068 (8) | 0.0016 (7) |
C15 | 0.0161 (8) | 0.0247 (9) | 0.0243 (9) | −0.0003 (7) | 0.0007 (7) | −0.0036 (7) |
C16 | 0.0159 (8) | 0.0251 (8) | 0.0210 (8) | 0.0015 (7) | −0.0006 (7) | 0.0023 (7) |
C17 | 0.0164 (8) | 0.0281 (9) | 0.0225 (8) | 0.0019 (7) | 0.0041 (7) | −0.0008 (7) |
C18 | 0.0198 (8) | 0.0219 (8) | 0.0184 (8) | 0.0010 (7) | 0.0026 (7) | −0.0027 (7) |
C19 | 0.0151 (8) | 0.0210 (8) | 0.0203 (8) | −0.0001 (6) | 0.0013 (7) | 0.0029 (7) |
C20 | 0.0195 (8) | 0.0294 (9) | 0.0266 (9) | −0.0019 (7) | 0.0072 (7) | −0.0068 (7) |
C21 | 0.0230 (9) | 0.0300 (10) | 0.0247 (9) | −0.0023 (8) | 0.0035 (7) | −0.0072 (8) |
C22 | 0.0242 (10) | 0.0402 (12) | 0.0475 (12) | 0.0015 (9) | 0.0115 (9) | −0.0201 (10) |
C23 | 0.0168 (8) | 0.0287 (9) | 0.0334 (10) | −0.0011 (7) | 0.0079 (7) | −0.0061 (8) |
O1—C18 | 1.370 (2) | C8—H8A | 0.9900 |
O1—C22 | 1.436 (2) | C8—H8B | 0.9900 |
O2—C19 | 1.3690 (19) | C9—C10 | 1.512 (2) |
O2—C23 | 1.434 (2) | C9—H9A | 0.9900 |
N1—C1 | 1.397 (2) | C9—H9B | 0.9900 |
N1—C13 | 1.411 (2) | C10—C11 | 1.391 (2) |
N2—C14 | 1.153 (2) | C11—C12 | 1.400 (2) |
N3—C13 | 1.351 (2) | C11—C16 | 1.494 (2) |
N3—H1 | 0.95 (2) | C12—C13 | 1.413 (2) |
N3—H2 | 0.92 (2) | C12—C15 | 1.436 (2) |
N4—C15 | 1.150 (2) | C16—C21 | 1.374 (2) |
C1—C10 | 1.413 (2) | C16—C17 | 1.399 (2) |
C1—C2 | 1.484 (2) | C17—C18 | 1.383 (2) |
C2—C3 | 1.396 (3) | C17—H17 | 0.9500 |
C2—C7 | 1.405 (3) | C18—C19 | 1.403 (2) |
C3—C4 | 1.386 (3) | C19—C20 | 1.380 (2) |
C3—H3 | 0.9500 | C20—C21 | 1.394 (2) |
C4—C5 | 1.381 (3) | C20—H20 | 0.9500 |
C4—H4 | 0.9500 | C21—H21 | 0.9500 |
C5—C6 | 1.386 (3) | C22—H22A | 0.9800 |
C5—H5 | 0.9500 | C22—H22B | 0.9800 |
C6—C7 | 1.392 (3) | C22—H22C | 0.9800 |
C6—H6 | 0.9500 | C23—H23A | 0.9800 |
C7—C8 | 1.499 (3) | C23—H23B | 0.9800 |
C8—C9 | 1.528 (3) | C23—H23C | 0.9800 |
C18—O1—C22 | 115.94 (13) | C1—C10—C9 | 117.78 (15) |
C19—O2—C23 | 116.23 (13) | C10—C11—C12 | 120.31 (15) |
C1—N1—C13 | 121.85 (15) | C10—C11—C16 | 120.23 (15) |
C13—N3—H1 | 121.0 (15) | C12—C11—C16 | 119.45 (15) |
C13—N3—H2 | 121.2 (13) | C11—C12—C13 | 121.05 (15) |
H1—N3—H2 | 117.7 (19) | C11—C12—C15 | 120.84 (14) |
N1—C1—C10 | 119.15 (15) | C13—C12—C15 | 118.10 (14) |
N1—C1—C2 | 122.66 (15) | N3—C13—N1 | 121.00 (15) |
C10—C1—C2 | 118.16 (15) | N3—C13—C12 | 121.45 (16) |
C3—C2—C7 | 119.44 (17) | N1—C13—C12 | 117.52 (14) |
C3—C2—C1 | 122.73 (17) | N4—C15—C12 | 177.44 (18) |
C7—C2—C1 | 117.76 (16) | C21—C16—C17 | 119.08 (15) |
C4—C3—C2 | 120.60 (19) | C21—C16—C11 | 121.48 (15) |
C4—C3—H3 | 119.7 | C17—C16—C11 | 119.44 (15) |
C2—C3—H3 | 119.7 | C18—C17—C16 | 120.75 (15) |
C5—C4—C3 | 119.7 (2) | C18—C17—H17 | 119.6 |
C5—C4—H4 | 120.1 | C16—C17—H17 | 119.6 |
C3—C4—H4 | 120.1 | O1—C18—C17 | 124.52 (15) |
C4—C5—C6 | 120.47 (19) | O1—C18—C19 | 115.72 (14) |
C4—C5—H5 | 119.8 | C17—C18—C19 | 119.76 (15) |
C6—C5—H5 | 119.8 | O2—C19—C20 | 124.56 (15) |
C5—C6—C7 | 120.5 (2) | O2—C19—C18 | 116.35 (14) |
C5—C6—H6 | 119.7 | C20—C19—C18 | 119.08 (15) |
C7—C6—H6 | 119.7 | C19—C20—C21 | 120.66 (16) |
C6—C7—C2 | 119.19 (19) | C19—C20—H20 | 119.7 |
C6—C7—C8 | 122.56 (18) | C21—C20—H20 | 119.7 |
C2—C7—C8 | 118.19 (16) | C16—C21—C20 | 120.48 (16) |
C7—C8—C9 | 108.73 (16) | C16—C21—H21 | 119.8 |
C7—C8—H8A | 109.9 | C20—C21—H21 | 119.8 |
C9—C8—H8A | 109.9 | O1—C22—H22A | 109.5 |
C7—C8—H8B | 109.9 | O1—C22—H22B | 109.5 |
C9—C8—H8B | 109.9 | H22A—C22—H22B | 109.5 |
H8A—C8—H8B | 108.3 | O1—C22—H22C | 109.5 |
C10—C9—C8 | 109.33 (14) | H22A—C22—H22C | 109.5 |
C10—C9—H9A | 109.8 | H22B—C22—H22C | 109.5 |
C8—C9—H9A | 109.8 | O2—C23—H23A | 109.5 |
C10—C9—H9B | 109.8 | O2—C23—H23B | 109.5 |
C8—C9—H9B | 109.8 | H23A—C23—H23B | 109.5 |
H9A—C9—H9B | 108.3 | O2—C23—H23C | 109.5 |
C11—C10—C1 | 119.86 (15) | H23A—C23—H23C | 109.5 |
C11—C10—C9 | 122.36 (15) | H23B—C23—H23C | 109.5 |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H1···O1i | 0.95 (2) | 2.24 (2) | 2.927 (2) | 129 (2) |
N3—H2···O2i | 0.92 (2) | 2.25 (2) | 2.987 (2) | 136 (2) |
Symmetry code: (i) x+1, −y+3/2, z+1/2. |
Experimental details
Crystal data | |
Chemical formula | 0.05C22H19N3O2·0.95C24H19N3O2 |
Mr | 380.22 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 100 |
a, b, c (Å) | 8.9347 (3), 14.4915 (5), 14.7818 (6) |
β (°) | 103.446 (4) |
V (Å3) | 1861.45 (12) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.30 × 0.25 × 0.20 |
Data collection | |
Diffractometer | Agilent SuperNova Dual diffractometer with an Atlas detector |
Absorption correction | Multi-scan (CrysAlis PRO; Agilent, 2010) |
Tmin, Tmax | 0.974, 0.983 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9240, 4160, 3146 |
Rint | 0.031 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.049, 0.124, 1.04 |
No. of reflections | 4160 |
No. of parameters | 270 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.30, −0.24 |
Computer programs: CrysAlis PRO (Agilent, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001), publCIF (Westrip, 2010).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H1···O1i | 0.95 (2) | 2.24 (2) | 2.927 (2) | 129 (2) |
N3—H2···O2i | 0.92 (2) | 2.25 (2) | 2.987 (2) | 136 (2) |
Symmetry code: (i) x+1, −y+3/2, z+1/2. |
Acknowledgements
We thank King Abdulaziz University and the University of Malaya for supporting this study.
References
Agilent (2010). CrysAlis PRO. Agilent Technologies, Yarnton, England. Google Scholar
Asiri, A. M., Al-Youbi, A. O., Faidallah, H. M. & Ng, S. W. (2011). Acta Cryst. E67, o2872. Web of Science CSD CrossRef IUCr Journals Google Scholar
Barbour, L. J. (2001). J. Supramol. Chem. 1, 189–191. CrossRef CAS Google Scholar
Etter, M. C., MacDonald, J. C. & Bernstein, J. (1990). Acta Cryst. B46, 256–262. CrossRef CAS Web of Science IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Westrip, S. P. (2010). J. Appl. Cryst. 43, 920–925. Web of Science CrossRef CAS IUCr Journals Google Scholar
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.
2-Amino-5,6-dihydro-4-phenyl-benzoquinoline-3-carbonitrile is synthesized from the reaction of the α-substituted cinnamonitrile, C6H5CH═C(CN)2, with α-tetralone in a reaction that is catalyzed by ammonium acetate. The synthesis when conducted under microwave irradiation leads to an improved yield. In previous studies, we obtained instead di-carbonitrile substituted dihydrophenanthrenes (3-amino-1-(4-methoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile and 3-amino-1-(2H-1,3-benzodioxol-5-yl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile) with 4-methoxybenzaldehyde and piperonaldehyde in syntheses that differed slightly from the reported ones as we used substituted benzaldehydes, α-tetralone and ethyl cyanoacetate along with a molar excess of ammonium acetate.
In this study, the reaction of 3,4-dimethoxybenzaldehyde, α-tetralone and ethyl cyanoacetate yielded the co-crystal of 2-amino-4-(3,4-dimethoxyphenyl)-5,6-dihydrobenzoquinoline-3-carbonitrile (C22H19N3O2) and 3-amino-1-(3,4-dimethoxyphenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile (C24H19N3O2) with the components present in a 1: 19 molar ratio (Scheme I). The fused-ring system is buckled owing to the ethylene linkage in the central ring with the two flanking aromatic rings twisted by 31.9 (1) °. Relative to the amino- and cyano-bearing aromatic ring, the benzene ring is twisted by 72.4 (1) ° (Figs. 1 and 2). Molecules are linked by duplex amine N–H···O (methoxy) hydrogen bonds (Table 1) in a cyclic association [graph set R22(7) (Etter et al., 1990)], generating a helical chain structure extending along [2 0 1].