organic compounds
3-Anilino-1,3-di-2-pyridylpropan-1-one
aMicroscale Science Institute, Department of Chemistry and Chemical Engineering, Weifang University, Weifang 261061, People's Republic of China
*Correspondence e-mail: wj-crystal@163.com
The title compound, C19H17N3O, was prepared by the 1,4-addition reaction of 1,3-di-2-pyridylprop-2-en-1-one with aniline, and includes one chiral C atom of the methine group with an R configuration. The is stabilized by intermolecular N—H⋯N and C—H⋯O hydrogen bonds. The also exhibits weak intermolecular C—H⋯π interactions between a pyridyl H atom and the phenyl ring of adjacent molecules.
Related literature
For properties of binucleating ligand coordination compounds, see: Casalino et al. (2009); Clare et al. (2004); Lam et al. (1996). For multiple pyridyl compounds, see: Huang et al. (2008). For related structures, see: Champouret et al. (2006); Murthy et al. (2001).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1997); cell SAINT (Bruker, 1997); data reduction: SAINT; 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
https://doi.org/10.1107/S160053680904121X/lx2115sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053680904121X/lx2115Isup2.hkl
1,3-di-2-pyridyl-2-en-1-one (5 mmol/1.044 g) was mixed with aniline (6 mmol/0.558 g) in toluene (20 ml). And then the phosphotungsitic (0.01 g) in water (10 ml) was added dropwise and refluxed for 2 h. The insoluble materials were produced, and then removed by filtration. The organic layer was kept at room temperature for about two days. Yellow-colored and block shaped crystals were collected (yield 67.6%).
All the Friedel pairs were merged. H atoms were positioned geometrically and allowed to ride on their parent atoms, with N—H and C—H distances of 0.86 and 0.93–0.96 Å, respectively, and with Uiso(H) = 1.2Ueq of the parent atoms.
The binucleating ligand has continued to arouse interest among chemists, because the extensive investigation of binucleating ligands plays a key role in bimetallic chemistry. These coordination compounds were potentially applied in bioinorganic chemistry,
magnetic exchange processes, and information of performance on important enzymes (Lam et al., 1996, Clare et al., 2004 & Casalino et al., 2009). Furthermore, compounds comprising multiple pyridyl groups are widely used in the design and self-assembly of metal-organic architectures (Huang et al., 2008). Here we report the of title compound (I) (Fig. 1).The bond distances and angles in (I) are consistent with the values in related structures (Champouret et al., 2006 & Murthy et al., 2001). The chiral C8 atom possesses the expected R configuaration. The molecualr packing (Fig. 2) is stabiized by intermolecular N—H···N and C—H···O hydrogen bonds; the first between the amino H atom and the pyridyl (C9–C13/N2) N atom, with a N3—H3···N2i, the second between the pyridyl (C9–C13/N2) H atom and the oxygen of the C═O unit, with a C10—H10···O1i, respectively (Table 1). The crystal packing (Fig. 3) is further stabilized by intermolecular C—H···π interactions between the pyridyl (C1–C5/N1) H atom and the phenyl ring, with a C3—H3···Cgii (Table 1; Cg is the centroid of the C14–C19 phenyl ring).
For properties of binucleating ligand coordination compounds, see: Casalino et al. (2009); Clare et al. (2004); Lam et al. (1996). For multiple pyridyl compounds, see: Huang et al. (2008). For related structures, see: Champouret et al. (2006); Murthy et al. (2001). Cg is the centroid of the C14–C19 phenyl ring.
Data collection: SMART (Bruker, 1997); cell
SAINT (Bruker, 1997); data reduction: SAINT (Bruker, 1997); 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).C19H17N3O | Dx = 1.264 Mg m−3 |
Mr = 303.36 | Melting point: 400 K |
Orthorhombic, P212121 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: p 2ac 2ab | Cell parameters from 1025 reflections |
a = 9.316 (2) Å | θ = 2.3–27.0° |
b = 10.275 (2) Å | µ = 0.08 mm−1 |
c = 16.652 (3) Å | T = 293 K |
V = 1594.0 (5) Å3 | Block, yellow |
Z = 4 | 0.35 × 0.30 × 0.24 mm |
F(000) = 640 |
Bruker SMART CCD diffractometer | 1961 independent reflections |
Radiation source: fine-focus sealed tube | 1040 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.077 |
Detector resolution: 10.0 pixels mm-1 | θmax = 27.0°, θmin = 2.3° |
φ and ω scans | h = −11→10 |
Absorption correction: multi-scan (SADABS; Sheldrick (2000) | k = −13→13 |
Tmin = 0.950, Tmax = 0.976 | l = −13→21 |
7562 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)] = 0.048 | Hydrogen site location: difference Fourier map |
wR(F2) = 0.118 | H-atom parameters constrained |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0005P)2 + 0.0531P] where P = (Fo2 + 2Fc2)/3 |
1961 reflections | (Δ/σ)max < 0.001 |
208 parameters | Δρmax = 0.15 e Å−3 |
0 restraints | Δρmin = −0.13 e Å−3 |
C19H17N3O | V = 1594.0 (5) Å3 |
Mr = 303.36 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 9.316 (2) Å | µ = 0.08 mm−1 |
b = 10.275 (2) Å | T = 293 K |
c = 16.652 (3) Å | 0.35 × 0.30 × 0.24 mm |
Bruker SMART CCD diffractometer | 1961 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick (2000) | 1040 reflections with I > 2σ(I) |
Tmin = 0.950, Tmax = 0.976 | Rint = 0.077 |
7562 measured reflections |
R[F2 > 2σ(F2)] = 0.048 | 0 restraints |
wR(F2) = 0.118 | H-atom parameters constrained |
S = 1.00 | Δρmax = 0.15 e Å−3 |
1961 reflections | Δρmin = −0.13 e Å−3 |
208 parameters |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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 | ||
O1 | 0.5253 (4) | 0.4411 (3) | 0.5808 (2) | 0.0934 (11) | |
N1 | 0.6804 (4) | 0.1340 (3) | 0.5653 (2) | 0.0659 (9) | |
N2 | 0.6078 (3) | 0.4744 (3) | 0.8480 (2) | 0.0551 (8) | |
N3 | 0.3789 (3) | 0.2540 (3) | 0.7351 (2) | 0.0628 (9) | |
H3N | 0.3971 | 0.1851 | 0.7076 | 0.075* | |
C1 | 0.7052 (5) | 0.0421 (5) | 0.5109 (3) | 0.0828 (14) | |
H1 | 0.7626 | −0.0277 | 0.5260 | 0.099* | |
C2 | 0.6530 (5) | 0.0426 (5) | 0.4350 (3) | 0.0841 (14) | |
H2 | 0.6734 | −0.0252 | 0.3997 | 0.101* | |
C3 | 0.5700 (5) | 0.1446 (5) | 0.4115 (3) | 0.0754 (13) | |
H3 | 0.5324 | 0.1480 | 0.3598 | 0.090* | |
C4 | 0.5428 (5) | 0.2424 (4) | 0.4655 (3) | 0.0693 (12) | |
H4 | 0.4868 | 0.3135 | 0.4508 | 0.083* | |
C5 | 0.5998 (4) | 0.2338 (3) | 0.5418 (2) | 0.0531 (10) | |
C6 | 0.5753 (4) | 0.3385 (4) | 0.6019 (3) | 0.0612 (11) | |
C7 | 0.6147 (4) | 0.3152 (4) | 0.6885 (2) | 0.0614 (11) | |
H7A | 0.6977 | 0.3677 | 0.7021 | 0.074* | |
H7B | 0.6405 | 0.2245 | 0.6956 | 0.074* | |
C8 | 0.4910 (4) | 0.3490 (3) | 0.7454 (2) | 0.0512 (10) | |
H8 | 0.4527 | 0.4340 | 0.7293 | 0.061* | |
C9 | 0.5452 (4) | 0.3607 (3) | 0.8309 (2) | 0.0493 (9) | |
C10 | 0.5356 (4) | 0.2627 (4) | 0.8858 (3) | 0.0660 (11) | |
H10 | 0.4912 | 0.1846 | 0.8726 | 0.079* | |
C11 | 0.5924 (5) | 0.2811 (5) | 0.9609 (3) | 0.0828 (14) | |
H11A | 0.5857 | 0.2156 | 0.9992 | 0.099* | |
C12 | 0.6590 (5) | 0.3961 (6) | 0.9794 (3) | 0.0842 (15) | |
H12 | 0.7000 | 0.4101 | 1.0296 | 0.101* | |
C13 | 0.6627 (4) | 0.4886 (4) | 0.9215 (3) | 0.0701 (13) | |
H13 | 0.7065 | 0.5674 | 0.9339 | 0.084* | |
C14 | 0.2431 (4) | 0.2689 (3) | 0.7675 (2) | 0.0504 (9) | |
C15 | 0.1444 (4) | 0.1682 (3) | 0.7591 (2) | 0.0552 (10) | |
H15 | 0.1720 | 0.0907 | 0.7348 | 0.066* | |
C16 | 0.0075 (5) | 0.1827 (4) | 0.7863 (3) | 0.0652 (11) | |
H16 | −0.0574 | 0.1149 | 0.7794 | 0.078* | |
C17 | −0.0373 (4) | 0.2942 (4) | 0.8235 (3) | 0.0654 (11) | |
H17 | −0.1312 | 0.3027 | 0.8417 | 0.078* | |
C18 | 0.0597 (4) | 0.3928 (4) | 0.8330 (3) | 0.0611 (11) | |
H18 | 0.0312 | 0.4690 | 0.8586 | 0.073* | |
C19 | 0.2000 (4) | 0.3816 (3) | 0.8054 (2) | 0.0545 (10) | |
H19 | 0.2644 | 0.4498 | 0.8124 | 0.065* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.135 (3) | 0.0631 (17) | 0.082 (2) | 0.0240 (19) | −0.001 (2) | 0.0020 (17) |
N1 | 0.071 (2) | 0.067 (2) | 0.060 (2) | 0.0110 (19) | −0.0054 (18) | −0.008 (2) |
N2 | 0.0545 (19) | 0.0534 (19) | 0.057 (2) | −0.0029 (16) | 0.0051 (16) | −0.0056 (17) |
N3 | 0.0509 (19) | 0.0561 (19) | 0.082 (2) | −0.0027 (16) | 0.0062 (17) | −0.0321 (19) |
C1 | 0.098 (4) | 0.081 (3) | 0.069 (3) | 0.023 (3) | −0.011 (3) | −0.011 (3) |
C2 | 0.096 (4) | 0.083 (3) | 0.073 (3) | 0.008 (3) | 0.002 (3) | −0.020 (3) |
C3 | 0.094 (4) | 0.082 (3) | 0.050 (3) | −0.007 (3) | 0.007 (2) | 0.000 (3) |
C4 | 0.084 (3) | 0.066 (3) | 0.057 (3) | −0.002 (2) | 0.002 (2) | 0.019 (2) |
C5 | 0.055 (2) | 0.047 (2) | 0.057 (3) | −0.005 (2) | 0.0043 (19) | 0.008 (2) |
C6 | 0.066 (3) | 0.056 (2) | 0.062 (3) | 0.001 (2) | 0.006 (2) | 0.002 (2) |
C7 | 0.064 (3) | 0.065 (2) | 0.055 (3) | 0.002 (2) | 0.005 (2) | −0.009 (2) |
C8 | 0.050 (2) | 0.0438 (19) | 0.060 (3) | −0.0032 (18) | 0.0016 (18) | −0.0048 (19) |
C9 | 0.046 (2) | 0.0425 (19) | 0.060 (2) | 0.0001 (18) | 0.0037 (19) | −0.002 (2) |
C10 | 0.068 (3) | 0.052 (2) | 0.077 (3) | 0.001 (2) | 0.009 (2) | 0.012 (2) |
C11 | 0.091 (4) | 0.087 (3) | 0.069 (3) | 0.028 (3) | 0.015 (3) | 0.028 (3) |
C12 | 0.084 (4) | 0.110 (4) | 0.058 (3) | 0.025 (3) | −0.007 (3) | −0.008 (3) |
C13 | 0.063 (3) | 0.076 (3) | 0.071 (3) | −0.001 (2) | 0.002 (2) | −0.021 (3) |
C14 | 0.052 (2) | 0.046 (2) | 0.054 (2) | 0.0035 (18) | −0.0036 (19) | −0.007 (2) |
C15 | 0.060 (3) | 0.048 (2) | 0.058 (2) | −0.001 (2) | −0.002 (2) | −0.0083 (19) |
C16 | 0.064 (3) | 0.064 (3) | 0.068 (3) | −0.013 (2) | 0.005 (2) | 0.001 (2) |
C17 | 0.050 (2) | 0.079 (3) | 0.067 (3) | 0.009 (2) | 0.006 (2) | 0.000 (2) |
C18 | 0.065 (3) | 0.059 (2) | 0.059 (3) | 0.015 (2) | −0.003 (2) | −0.005 (2) |
C19 | 0.055 (3) | 0.051 (2) | 0.058 (2) | 0.0027 (18) | −0.006 (2) | −0.0078 (19) |
O1—C6 | 1.205 (4) | C8—C9 | 1.516 (5) |
N1—C5 | 1.329 (4) | C8—H8 | 0.9800 |
N1—C1 | 1.330 (5) | C9—C10 | 1.363 (5) |
N2—C13 | 1.335 (5) | C10—C11 | 1.370 (7) |
N2—C9 | 1.336 (4) | C10—H10 | 0.9300 |
N3—C14 | 1.384 (4) | C11—C12 | 1.370 (6) |
N3—C8 | 1.440 (4) | C11—H11A | 0.9300 |
N3—H3N | 0.8600 | C12—C13 | 1.354 (6) |
C1—C2 | 1.354 (7) | C12—H12 | 0.9300 |
C1—H1 | 0.9300 | C13—H13 | 0.9300 |
C2—C3 | 1.359 (6) | C14—C19 | 1.379 (5) |
C2—H2 | 0.9300 | C14—C15 | 1.390 (5) |
C3—C4 | 1.372 (6) | C15—C16 | 1.362 (5) |
C3—H3 | 0.9300 | C15—H15 | 0.9300 |
C4—C5 | 1.380 (6) | C16—C17 | 1.367 (5) |
C4—H4 | 0.9300 | C16—H16 | 0.9300 |
C5—C6 | 1.487 (5) | C17—C18 | 1.366 (5) |
C6—C7 | 1.506 (6) | C17—H17 | 0.9300 |
C7—C8 | 1.531 (5) | C18—C19 | 1.391 (5) |
C7—H7A | 0.9700 | C18—H18 | 0.9300 |
C7—H7B | 0.9700 | C19—H19 | 0.9300 |
C5—N1—C1 | 116.4 (4) | C7—C8—H8 | 107.9 |
C13—N2—C9 | 117.2 (4) | N2—C9—C10 | 122.1 (4) |
C14—N3—C8 | 122.8 (3) | N2—C9—C8 | 114.5 (3) |
C14—N3—H3N | 118.6 | C10—C9—C8 | 123.4 (3) |
C8—N3—H3N | 118.6 | C9—C10—C11 | 119.0 (4) |
N1—C1—C2 | 124.8 (5) | C9—C10—H10 | 120.5 |
N1—C1—H1 | 117.6 | C11—C10—H10 | 120.5 |
C2—C1—H1 | 117.6 | C12—C11—C10 | 119.9 (4) |
C1—C2—C3 | 118.4 (5) | C12—C11—H11A | 120.0 |
C1—C2—H2 | 120.8 | C10—C11—H11A | 120.0 |
C3—C2—H2 | 120.8 | C13—C12—C11 | 117.2 (4) |
C2—C3—C4 | 118.8 (4) | C13—C12—H12 | 121.4 |
C2—C3—H3 | 120.6 | C11—C12—H12 | 121.4 |
C4—C3—H3 | 120.6 | N2—C13—C12 | 124.5 (4) |
C3—C4—C5 | 119.0 (4) | N2—C13—H13 | 117.7 |
C3—C4—H4 | 120.5 | C12—C13—H13 | 117.7 |
C5—C4—H4 | 120.5 | C19—C14—N3 | 122.5 (3) |
N1—C5—C4 | 122.5 (4) | C19—C14—C15 | 118.6 (3) |
N1—C5—C6 | 116.5 (4) | N3—C14—C15 | 118.9 (3) |
C4—C5—C6 | 121.0 (4) | C16—C15—C14 | 120.3 (3) |
O1—C6—C5 | 119.8 (4) | C16—C15—H15 | 119.9 |
O1—C6—C7 | 120.8 (4) | C14—C15—H15 | 119.9 |
C5—C6—C7 | 119.5 (3) | C15—C16—C17 | 121.9 (4) |
C6—C7—C8 | 111.9 (3) | C15—C16—H16 | 119.0 |
C6—C7—H7A | 109.2 | C17—C16—H16 | 119.0 |
C8—C7—H7A | 109.2 | C18—C17—C16 | 118.1 (4) |
C6—C7—H7B | 109.2 | C18—C17—H17 | 120.9 |
C8—C7—H7B | 109.2 | C16—C17—H17 | 120.9 |
H7A—C7—H7B | 107.9 | C17—C18—C19 | 121.5 (4) |
N3—C8—C9 | 114.0 (3) | C17—C18—H18 | 119.3 |
N3—C8—C7 | 108.5 (3) | C19—C18—H18 | 119.3 |
C9—C8—C7 | 110.4 (3) | C14—C19—C18 | 119.6 (4) |
N3—C8—H8 | 107.9 | C14—C19—H19 | 120.2 |
C9—C8—H8 | 107.9 | C18—C19—H19 | 120.2 |
C5—N1—C1—C2 | −1.0 (7) | N3—C8—C9—N2 | −157.1 (3) |
N1—C1—C2—C3 | 0.7 (8) | C7—C8—C9—N2 | 80.3 (4) |
C1—C2—C3—C4 | 0.0 (7) | N3—C8—C9—C10 | 24.8 (5) |
C2—C3—C4—C5 | −0.3 (7) | C7—C8—C9—C10 | −97.7 (4) |
C1—N1—C5—C4 | 0.7 (6) | N2—C9—C10—C11 | −0.2 (6) |
C1—N1—C5—C6 | −178.4 (4) | C8—C9—C10—C11 | 177.7 (4) |
C3—C4—C5—N1 | −0.1 (6) | C9—C10—C11—C12 | −0.8 (7) |
C3—C4—C5—C6 | 179.0 (4) | C10—C11—C12—C13 | 1.3 (7) |
N1—C5—C6—O1 | 167.1 (4) | C9—N2—C13—C12 | 0.0 (6) |
C4—C5—C6—O1 | −12.0 (6) | C11—C12—C13—N2 | −0.9 (7) |
N1—C5—C6—C7 | −12.3 (5) | C8—N3—C14—C19 | 6.6 (5) |
C4—C5—C6—C7 | 168.6 (4) | C8—N3—C14—C15 | −175.7 (3) |
O1—C6—C7—C8 | 51.2 (5) | C19—C14—C15—C16 | 1.5 (6) |
C5—C6—C7—C8 | −129.4 (3) | N3—C14—C15—C16 | −176.3 (4) |
C14—N3—C8—C9 | 67.7 (4) | C14—C15—C16—C17 | −1.0 (6) |
C14—N3—C8—C7 | −168.8 (3) | C15—C16—C17—C18 | 0.0 (6) |
C6—C7—C8—N3 | 69.9 (4) | C16—C17—C18—C19 | 0.6 (6) |
C6—C7—C8—C9 | −164.4 (3) | N3—C14—C19—C18 | 176.7 (4) |
C13—N2—C9—C10 | 0.6 (5) | C15—C14—C19—C18 | −0.9 (5) |
C13—N2—C9—C8 | −177.4 (3) | C17—C18—C19—C14 | −0.1 (6) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···N2i | 0.86 | 2.35 | 3.191 (4) | 164 |
C10—H10···O1i | 0.93 | 2.62 | 3.398 (5) | 141 |
C3—H3···Cgii | 0.93 | 2.77 | 3.548 (5) | 142 |
Symmetry codes: (i) −x+1, y−1/2, −z+3/2; (ii) x+1/2, −y+1/2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C19H17N3O |
Mr | 303.36 |
Crystal system, space group | Orthorhombic, P212121 |
Temperature (K) | 293 |
a, b, c (Å) | 9.316 (2), 10.275 (2), 16.652 (3) |
V (Å3) | 1594.0 (5) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.35 × 0.30 × 0.24 |
Data collection | |
Diffractometer | Bruker SMART CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick (2000) |
Tmin, Tmax | 0.950, 0.976 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 7562, 1961, 1040 |
Rint | 0.077 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.048, 0.118, 1.00 |
No. of reflections | 1961 |
No. of parameters | 208 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.15, −0.13 |
Computer programs: SMART (Bruker, 1997), SAINT (Bruker, 1997), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3N···N2i | 0.86 | 2.35 | 3.191 (4) | 164.2 |
C10—H10···O1i | 0.93 | 2.62 | 3.398 (5) | 141.2 |
C3—H3···Cgii | 0.93 | 2.77 | 3.548 (5) | 141.9 |
Symmetry codes: (i) −x+1, y−1/2, −z+3/2; (ii) x+1/2, −y+1/2, −z+1. |
References
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The binucleating ligand has continued to arouse interest among chemists, because the extensive investigation of binucleating ligands plays a key role in bimetallic chemistry. These coordination compounds were potentially applied in bioinorganic chemistry, homogeneous catalysis, magnetic exchange processes, and information of performance on important enzymes (Lam et al., 1996, Clare et al., 2004 & Casalino et al., 2009). Furthermore, compounds comprising multiple pyridyl groups are widely used in the design and self-assembly of metal-organic architectures (Huang et al., 2008). Here we report the crystal structure of title compound (I) (Fig. 1).
The bond distances and angles in (I) are consistent with the values in related structures (Champouret et al., 2006 & Murthy et al., 2001). The chiral C8 atom possesses the expected R configuaration. The molecualr packing (Fig. 2) is stabiized by intermolecular N—H···N and C—H···O hydrogen bonds; the first between the amino H atom and the pyridyl (C9–C13/N2) N atom, with a N3—H3···N2i, the second between the pyridyl (C9–C13/N2) H atom and the oxygen of the C═O unit, with a C10—H10···O1i, respectively (Table 1). The crystal packing (Fig. 3) is further stabilized by intermolecular C—H···π interactions between the pyridyl (C1–C5/N1) H atom and the phenyl ring, with a C3—H3···Cgii (Table 1; Cg is the centroid of the C14–C19 phenyl ring).