The novel compound N-(2-hydroxy-5-methylphenyl)-2,3-dimethoxybenzamide, C16H17NO4, I, was prepared by a two-step reaction and then characterized by elemental analysis and X-ray diffraction (XRD) methods. Moreover, its spectroscopic properties were investigated by FT–IR and 1H and 13C NMR. Compound I crystallized in the monoclinic space group P21/c and the molecular geometry is not planar, being divided into three planar regions. Supramolecular structures are formed by connecting units via hydrogen bonds. The ground-state molecular structure of I was optimized by the DFT-B3LYP/6-31G(d,p) method and the theoretical structure was compared with that obtained by X-ray diffraction. Intermolecular interactions in the crystal network were studied by two-dimensional (2D) and three-dimensional (3D) Hirshfeld analyses. The calculated electronic transition results were examined and the molecular electrostatic potentials (MEPs) were also determined. The in vitro antimicrobial activities of I against three Gram-positive bacteria, three Gram-negative bacteria and two fungi were determined. The compound was compared with several control drugs and showed better activity than the amoxicillin standard against Gram-positive bacteria B. subtilis, S. aureus and E. faecalis, and Gram-negative bacteria E. coli, K. pneumoniae and P. aeruginosa. The density functional theory (DFT)-optimized structure of the small molecule was used to perform molecular docking studies with proteins from experimentally studied bacterial and fungal organisms using AutoDock to determine the most preferred binding mode of the ligand within the protein cavity. A druglikeness assay and ADME (absorption, distribution, metabolism and excretion) and toxicology studies were carried out and predict a good drug-like character.
Supporting information
CCDC reference: 2174193
Data collection: APEX2 (Bruker, 2006); cell refinement: SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); program(s) used to solve structure: SHELXT2018 (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2018 (Sheldrick, 2015b); molecular graphics: WinGX (Farrugia, 2012), ORTEP-3 (Farrugia, 2012) and Mercury
(Macrae et al., 2020); software used to prepare material for publication: SHELXTL (Bruker, 2006).
N-(2-Hydroxy-5-methylphenyl)-2,3-dimethoxybenzamide
top
Crystal data top
C16H17NO4 | F(000) = 608 |
Mr = 287.30 | Dx = 1.333 Mg m−3 |
Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
a = 6.7134 (5) Å | Cell parameters from 9654 reflections |
b = 15.9685 (11) Å | θ = 3.0–25.9° |
c = 13.3879 (8) Å | µ = 0.10 mm−1 |
β = 93.999 (2)° | T = 293 K |
V = 1431.73 (17) Å3 | Block, colourless |
Z = 4 | 0.19 × 0.16 × 0.12 mm |
Data collection top
Bruker D8 QUEST diffractometer | Rint = 0.052 |
Radiation source: fine-focus sealed tube | θmax = 28.3°, θmin = 2.0° |
φ and ω scans | h = −8→8 |
29028 measured reflections | k = −21→21 |
3533 independent reflections | l = −17→17 |
2474 reflections with I > 2σ(I) | |
Refinement top
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)] = 0.053 | Hydrogen site location: mixed |
wR(F2) = 0.157 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.08 | w = 1/[σ2(Fo2) + (0.0737P)2 + 0.3634P] where P = (Fo2 + 2Fc2)/3 |
3533 reflections | (Δ/σ)max < 0.001 |
222 parameters | Δρmax = 0.24 e Å−3 |
0 restraints | Δρmin = −0.18 e Å−3 |
Special details top
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. |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
O4 | 0.54603 (18) | 0.43051 (8) | 0.39099 (8) | 0.0401 (3) | |
O2 | 0.8022 (2) | 0.34966 (9) | 0.13115 (9) | 0.0512 (4) | |
O1 | 0.8127 (2) | 0.25647 (10) | 0.46937 (10) | 0.0565 (4) | |
O3 | 0.2097 (2) | 0.52048 (10) | 0.37656 (10) | 0.0600 (4) | |
N1 | 0.8156 (2) | 0.34236 (9) | 0.30058 (10) | 0.0379 (4) | |
C10 | 0.5479 (3) | 0.42134 (10) | 0.21206 (11) | 0.0335 (4) | |
C1 | 0.9662 (3) | 0.23909 (11) | 0.41068 (12) | 0.0389 (4) | |
C9 | 0.7333 (3) | 0.36847 (10) | 0.21119 (11) | 0.0336 (4) | |
C2 | 1.1142 (3) | 0.18170 (12) | 0.43645 (14) | 0.0468 (5) | |
H2 | 1.113523 | 0.152916 | 0.496814 | 0.056* | |
C6 | 1.1226 (3) | 0.26844 (11) | 0.25812 (13) | 0.0378 (4) | |
H6 | 1.126253 | 0.298387 | 0.198692 | 0.045* | |
C7 | 0.9699 (3) | 0.28335 (10) | 0.32024 (12) | 0.0341 (4) | |
C3 | 1.2636 (3) | 0.16683 (12) | 0.37283 (15) | 0.0481 (5) | |
H3 | 1.361682 | 0.127373 | 0.390549 | 0.058* | |
C17 | 0.4560 (3) | 0.44714 (10) | 0.29723 (12) | 0.0337 (4) | |
C4 | 1.2702 (3) | 0.20979 (11) | 0.28274 (14) | 0.0415 (4) | |
C14 | 0.2799 (3) | 0.49493 (11) | 0.28836 (14) | 0.0416 (4) | |
C11 | 0.4577 (3) | 0.44351 (12) | 0.11808 (13) | 0.0449 (5) | |
H11 | 0.516710 | 0.427138 | 0.060366 | 0.054* | |
C16 | 0.4293 (4) | 0.38700 (15) | 0.46134 (16) | 0.0499 (5) | |
C12 | 0.2843 (3) | 0.48886 (13) | 0.11000 (15) | 0.0530 (5) | |
H12 | 0.226723 | 0.502602 | 0.046932 | 0.064* | |
C13 | 0.1936 (3) | 0.51448 (12) | 0.19444 (16) | 0.0510 (5) | |
H13 | 0.075069 | 0.544742 | 0.188104 | 0.061* | |
C5 | 1.4322 (4) | 0.19196 (17) | 0.2134 (2) | 0.0582 (6) | |
C15 | 0.0319 (4) | 0.56845 (17) | 0.3735 (2) | 0.0759 (7) | |
H15A | 0.000546 | 0.581886 | 0.440568 | 0.114* | |
H15B | 0.050199 | 0.619218 | 0.336892 | 0.114* | |
H15C | −0.075649 | 0.536759 | 0.341149 | 0.114* | |
H1A | 0.749 (3) | 0.3585 (13) | 0.3510 (15) | 0.046 (6)* | |
H16A | 0.330 (5) | 0.354 (2) | 0.431 (3) | 0.121 (12)* | |
H16B | 0.364 (4) | 0.426 (2) | 0.504 (2) | 0.098 (9)* | |
H16C | 0.523 (5) | 0.357 (2) | 0.503 (2) | 0.104 (10)* | |
H5A | 1.424 (4) | 0.230 (2) | 0.156 (2) | 0.094 (9)* | |
H5B | 1.427 (4) | 0.1382 (19) | 0.1910 (19) | 0.085 (9)* | |
H5C | 1.564 (5) | 0.194 (2) | 0.247 (2) | 0.104 (10)* | |
H1 | 0.815 (4) | 0.2212 (17) | 0.5191 (19) | 0.072 (7)* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O4 | 0.0399 (7) | 0.0530 (7) | 0.0272 (6) | 0.0070 (5) | 0.0016 (5) | −0.0028 (5) |
O2 | 0.0563 (9) | 0.0698 (9) | 0.0284 (6) | 0.0072 (7) | 0.0096 (6) | −0.0054 (6) |
O1 | 0.0630 (10) | 0.0679 (10) | 0.0409 (7) | 0.0222 (7) | 0.0212 (7) | 0.0189 (7) |
O3 | 0.0531 (9) | 0.0692 (10) | 0.0578 (9) | 0.0266 (7) | 0.0041 (7) | −0.0082 (7) |
N1 | 0.0428 (9) | 0.0452 (8) | 0.0265 (7) | 0.0093 (7) | 0.0088 (6) | 0.0008 (6) |
C10 | 0.0387 (10) | 0.0322 (8) | 0.0294 (8) | −0.0055 (7) | −0.0003 (7) | 0.0023 (6) |
C1 | 0.0433 (10) | 0.0399 (9) | 0.0340 (9) | 0.0042 (8) | 0.0060 (7) | −0.0002 (7) |
C9 | 0.0383 (10) | 0.0356 (9) | 0.0273 (8) | −0.0063 (7) | 0.0042 (7) | −0.0013 (6) |
C2 | 0.0535 (12) | 0.0457 (10) | 0.0408 (10) | 0.0083 (9) | 0.0006 (9) | 0.0060 (8) |
C6 | 0.0415 (10) | 0.0381 (9) | 0.0343 (9) | −0.0021 (8) | 0.0068 (7) | −0.0035 (7) |
C7 | 0.0363 (9) | 0.0350 (8) | 0.0311 (8) | 0.0022 (7) | 0.0025 (7) | −0.0026 (7) |
C3 | 0.0471 (12) | 0.0418 (10) | 0.0548 (12) | 0.0108 (8) | −0.0010 (9) | −0.0018 (8) |
C17 | 0.0373 (9) | 0.0321 (8) | 0.0311 (8) | −0.0026 (7) | −0.0023 (7) | 0.0006 (6) |
C4 | 0.0385 (10) | 0.0397 (9) | 0.0468 (10) | −0.0006 (8) | 0.0059 (8) | −0.0110 (8) |
C14 | 0.0398 (10) | 0.0372 (9) | 0.0473 (10) | 0.0023 (8) | −0.0005 (8) | 0.0007 (7) |
C11 | 0.0519 (12) | 0.0497 (11) | 0.0325 (9) | −0.0050 (9) | −0.0020 (8) | 0.0059 (7) |
C16 | 0.0567 (14) | 0.0587 (13) | 0.0353 (10) | 0.0060 (11) | 0.0108 (9) | 0.0051 (9) |
C12 | 0.0560 (13) | 0.0571 (12) | 0.0434 (11) | −0.0013 (10) | −0.0148 (9) | 0.0139 (9) |
C13 | 0.0439 (11) | 0.0452 (11) | 0.0621 (12) | 0.0064 (9) | −0.0093 (9) | 0.0081 (9) |
C5 | 0.0506 (14) | 0.0562 (14) | 0.0700 (16) | 0.0047 (11) | 0.0196 (12) | −0.0106 (12) |
C15 | 0.0580 (15) | 0.0777 (16) | 0.0920 (18) | 0.0322 (13) | 0.0055 (13) | −0.0112 (14) |
Geometric parameters (Å, º) top
O4—C17 | 1.3804 (19) | C3—C4 | 1.391 (3) |
O4—C16 | 1.445 (2) | C3—H3 | 0.9300 |
O2—C9 | 1.2336 (19) | C17—C14 | 1.405 (2) |
O1—C1 | 1.367 (2) | C4—C5 | 1.505 (3) |
O1—H1 | 0.87 (3) | C14—C13 | 1.383 (3) |
O3—C14 | 1.364 (2) | C11—C12 | 1.369 (3) |
O3—C15 | 1.417 (2) | C11—H11 | 0.9300 |
N1—C9 | 1.349 (2) | C16—H16A | 0.92 (4) |
N1—C7 | 1.411 (2) | C16—H16B | 0.97 (3) |
N1—H1A | 0.87 (2) | C16—H16C | 0.95 (3) |
C10—C17 | 1.396 (2) | C12—C13 | 1.383 (3) |
C10—C11 | 1.403 (2) | C12—H12 | 0.9300 |
C10—C9 | 1.505 (2) | C13—H13 | 0.9300 |
C1—C2 | 1.378 (3) | C5—H5A | 0.97 (3) |
C1—C7 | 1.404 (2) | C5—H5B | 0.91 (3) |
C2—C3 | 1.381 (3) | C5—H5C | 0.97 (3) |
C2—H2 | 0.9300 | C15—H15A | 0.9600 |
C6—C7 | 1.385 (2) | C15—H15B | 0.9600 |
C6—C4 | 1.386 (3) | C15—H15C | 0.9600 |
C6—H6 | 0.9300 | | |
| | | |
C17—O4—C16 | 117.55 (15) | C3—C4—C5 | 120.61 (19) |
C1—O1—H1 | 109.6 (16) | O3—C14—C13 | 124.85 (17) |
C14—O3—C15 | 118.59 (17) | O3—C14—C17 | 115.39 (15) |
C9—N1—C7 | 128.45 (14) | C13—C14—C17 | 119.74 (17) |
C9—N1—H1A | 113.3 (13) | C12—C11—C10 | 121.04 (18) |
C7—N1—H1A | 117.4 (13) | C12—C11—H11 | 119.5 |
C17—C10—C11 | 118.08 (16) | C10—C11—H11 | 119.5 |
C17—C10—C9 | 125.78 (14) | O4—C16—H16A | 113 (2) |
C11—C10—C9 | 116.09 (15) | O4—C16—H16B | 110.9 (17) |
O1—C1—C2 | 123.39 (16) | H16A—C16—H16B | 107 (3) |
O1—C1—C7 | 116.95 (16) | O4—C16—H16C | 105.4 (19) |
C2—C1—C7 | 119.67 (17) | H16A—C16—H16C | 114 (3) |
O2—C9—N1 | 122.70 (16) | H16B—C16—H16C | 107 (2) |
O2—C9—C10 | 120.26 (15) | C11—C12—C13 | 120.82 (17) |
N1—C9—C10 | 117.03 (14) | C11—C12—H12 | 119.6 |
C1—C2—C3 | 120.14 (17) | C13—C12—H12 | 119.6 |
C1—C2—H2 | 119.9 | C12—C13—C14 | 119.75 (18) |
C3—C2—H2 | 119.9 | C12—C13—H13 | 120.1 |
C7—C6—C4 | 121.34 (16) | C14—C13—H13 | 120.1 |
C7—C6—H6 | 119.3 | C4—C5—H5A | 111.1 (16) |
C4—C6—H6 | 119.3 | C4—C5—H5B | 111.6 (17) |
C6—C7—C1 | 119.32 (16) | H5A—C5—H5B | 109 (2) |
C6—C7—N1 | 124.55 (15) | C4—C5—H5C | 112.7 (18) |
C1—C7—N1 | 116.11 (15) | H5A—C5—H5C | 111 (2) |
C2—C3—C4 | 121.23 (17) | H5B—C5—H5C | 101 (2) |
C2—C3—H3 | 119.4 | O3—C15—H15A | 109.5 |
C4—C3—H3 | 119.4 | O3—C15—H15B | 109.5 |
O4—C17—C10 | 119.73 (15) | H15A—C15—H15B | 109.5 |
O4—C17—C14 | 119.57 (15) | O3—C15—H15C | 109.5 |
C10—C17—C14 | 120.55 (15) | H15A—C15—H15C | 109.5 |
C6—C4—C3 | 118.30 (16) | H15B—C15—H15C | 109.5 |
C6—C4—C5 | 121.09 (19) | | |
| | | |
C7—N1—C9—O2 | −8.8 (3) | C9—C10—C17—O4 | 6.0 (2) |
C7—N1—C9—C10 | 170.08 (16) | C11—C10—C17—C14 | −0.9 (2) |
C17—C10—C9—O2 | −179.66 (16) | C9—C10—C17—C14 | −178.47 (15) |
C11—C10—C9—O2 | 2.7 (2) | C7—C6—C4—C3 | −1.1 (3) |
C17—C10—C9—N1 | 1.4 (2) | C7—C6—C4—C5 | 178.10 (18) |
C11—C10—C9—N1 | −176.22 (15) | C2—C3—C4—C6 | 0.2 (3) |
O1—C1—C2—C3 | 179.38 (18) | C2—C3—C4—C5 | −179.1 (2) |
C7—C1—C2—C3 | −1.1 (3) | C15—O3—C14—C13 | 2.1 (3) |
C4—C6—C7—C1 | 1.0 (3) | C15—O3—C14—C17 | −179.56 (19) |
C4—C6—C7—N1 | 179.51 (17) | O4—C17—C14—O3 | −1.0 (2) |
O1—C1—C7—C6 | 179.71 (16) | C10—C17—C14—O3 | −176.52 (15) |
C2—C1—C7—C6 | 0.1 (3) | O4—C17—C14—C13 | 177.48 (16) |
O1—C1—C7—N1 | 1.1 (2) | C10—C17—C14—C13 | 1.9 (3) |
C2—C1—C7—N1 | −178.53 (17) | C17—C10—C11—C12 | −0.2 (3) |
C9—N1—C7—C6 | 30.2 (3) | C9—C10—C11—C12 | 177.57 (17) |
C9—N1—C7—C1 | −151.24 (18) | C10—C11—C12—C13 | 0.3 (3) |
C1—C2—C3—C4 | 0.9 (3) | C11—C12—C13—C14 | 0.7 (3) |
C16—O4—C17—C10 | −125.94 (18) | O3—C14—C13—C12 | 176.47 (18) |
C16—O4—C17—C14 | 58.5 (2) | C17—C14—C13—C12 | −1.8 (3) |
C11—C10—C17—O4 | −176.44 (15) | | |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2i | 0.87 (3) | 1.89 (3) | 2.7548 (19) | 175 (2) |
N1—H1A···O1 | 0.87 (2) | 2.29 (2) | 2.6447 (19) | 104.1 (15) |
N1—H1A···O4 | 0.87 (2) | 1.89 (2) | 2.6510 (19) | 144.7 (18) |
C6—H6···O2 | 0.93 | 2.44 | 2.948 (2) | 115 |
C11—H11···O2 | 0.93 | 2.42 | 2.751 (2) | 101 |
C16—H16B···O3 | 0.97 (3) | 2.45 (3) | 2.788 (3) | 100.2 (19) |
Symmetry code: (i) x, −y+1/2, z+1/2. |
Dihedral angles (°) between planes topPlanes | Dihedral angle (XRD) | Dihedral angle (DFT) |
P1–P2 | 5.87° | 6.18° |
P2–P3 | 23.24° | 3.08° |
P1–P3 | 27.12° | 3.12° |
Bond lengths (Å) and bond angles (°) related to X-ray diffraction (XRD) and
theoretical calculations (DFT) topBond length | XRD | DFT | Bond angles | XRD | DFT |
O4—C17 | 1.380 (2) | 1.398 | C17—O4—C16 | 117.55 (15) | 119.60 |
O4—C16 | 1.445 (2) | 1.472 | C14—O3—C15 | 118.59 (17) | 118.57 |
O2—C9 | 1.234 (2) | 1.259 | C9—N1—C7 | 128.45 (14) | 127.69 |
O1—C1 | 1.367 (2) | 1.403 | C17—C10—C11 | 118.08 (16) | 118.66 |
O3—C14 | 1.364 (2) | 1.393 | C17—C10—C9 | 125.78 (14) | 125.85 |
O3—C15 | 1.417 (2) | 1.452 | C11—C10—C9 | 116.09 (15) | 115.47 |
N1—C9 | 1.349 (2) | 1.370 | O1—C1—C2 | 123.39 (16) | 123.11 |
N1—C7 | 1.411 (2) | 1.407 | O1—C1—C7 | 116.95 (16) | 116.00 |
C10—C17 | 1.396 (2) | 1.408 | C2—C1—C7 | 119.67 (17) | 120.94 |
C10—C11 | 1.403 (2) | 1.409 | O2—C9—N1 | 122.70 (16) | 123.29 |
C10—C9 | 1.505 (2) | 1.509 | O2—C9—C10 | 120.26 (17) | 119.47 |
C1—C2 | 1.378 (3) | 1.389 | N1—C9—C10 | 117.03 (14) | 117.24 |
C1—C7 | 1.404 (2) | 1.413 | C1—C2—C3 | 120.14 (17) | 119.85 |
C2—C3 | 1.381 (3) | 1.402 | C7—C6—C4 | 121.34 (16) | 121.05 |
C6—C7 | 1.385 (2) | 1.402 | C6—C7—C1 | 119.32 (16) | 118.51 |
C6—C4 | 1.386 (3) | 1.407 | C6—C7—N1 | 124.55 (15) | 125.35 |
C3—C4 | 1.391 (3) | 1.400 | C1—C7—N1 | 116.11 (15) | 116.13 |
C17—C14 | 1.405 (2) | 1.412 | C2—C3—C4 | 121.23 (17) | 120.48 |
C4—C5 | 1.505 (3) | 1.514 | O4—C17—C10 | 119.73 (15) | 119.28 |
C14—C13 | 1.383 (3) | 1.396 | O4—C17—C14 | 119.57 (15) | 120.43 |
C11—C12 | 1.369 (3) | 1.389 | C10—C17—C14 | 120.55 (15) | 120.16 |
C12—C13 | 1.383 (3) | 1.401 | C3—C4—C6 | 118.53 (19) | 119.16 |
| | | C3—C4—C5 | 120.61 (19) | 121.09 |
| | | C6—C4—C5 | 120.09 (19) | 119.74 |
| | | O3—C14—C13 | 124.85 (17) | 123.98 |
| | | O3—C14—C17 | 115.39 (15) | 115.82 |
| | | C13—C14—C17 | 119.74 (17) | 120.19 |
| | | C12—C11—C10 | 121.04 (18) | 120.97 |
The geometric data of noncovalent interactions topCg1 is the centroid of the C1–C3/C5–C7 ring. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2i | 0.87 | 1.89 | 2.7548 (19) | 175.0 (2) |
N1—H1A···O1 | 0.87 (2) | 2.29 (3) | 2.6447 (19) | 104.1 (15) |
N1—H1A···O4 | 0.87 (2) | 1.89 (3) | 2.6510 (19) | 144.7 (18) |
C6—H6···O2 | 0.93 | 2.44 | 2.948 (3) | 115 |
C11—H11···O2 | 0.93 | 2.42 | 2.751 (3) | 101 |
C16—H16B···O3 | 0.97 | 2.45 (3) | 2.788 (3) | 100.2 (19) |
| | | | |
X—H···Cg | X—H | H···Cg | X···Cg | X—H···Cg |
C16—H16A···Cg1ii | 0.92 (4) | 2.71 (3) | 3.603 | 164 |
Symmetry codes:
(i) x, -y+1/2, z+1/2;
(ii) x-1, y, z. |
MPA of title compound topAtom | MPA | Atom | MPA | Atom | MPA | Atom | MPA |
O1 | -0.6480 | C3 | -0.1569 | C9 | 0.5055 | C15 | -0.1692 |
H1 | 0.3768 | H3 | 0.1170 | C10 | 0.0360 | H15A | 0.1706 |
O2 | -0.4809 | C4 | 0.0935 | C11 | -0.1561 | H15B | 0.1515 |
O3 | -0.5673 | C5 | -0.4781 | H11 | 0.1729 | H15C | 0.1559 |
O4 | -0.5919 | H5A | 0.1348 | C12 | -0.1344 | C16 | -0.1709 |
N1 | -0.8147 | H5B | 0.1538 | H12 | 0.1318 | H16B | 0.1698 |
H1A | 0.4190 | H5C | 0.1541 | C13 | -0.1333 | H16A | 0.1454 |
C1 | 0.1938 | C6 | -0.1422 | H13 | 0.1347 | H16C | 0.1809 |
C2 | -0.1336 | H6 | 0.1853 | C14 | 0.2966 | C17 | 0.2417 |
H2 | 0.1130 | C7 | 0.3427 | | | | |
Comparison of quantum chemical descriptors of I
with the literature topHOMO is the highest occupied molecular orbital,
LUMO is the lowest unoccupied molecular orbital,
Egap is the energy band gap,
I is ionization potantial,
A is electron affinity,
η is chemical hardness,
σ is the hemical softness,
χ is lectronegativity,
µ is chemical potential,
ω is the electrophilic index,
N is the ucleophilic index;
ΔNmax is maximum charge transfer and
S is global softness. |
| Title compound DFT-B3LYP/631-G | Demir et al. (2015) |
EHOMO (eV) | -5.39 | -5.44 |
ELUMO (eV) | -1.03 | -0.98 |
Egap (eV) (EHOMO – ELUMO) | 4.36 | 4.46 |
I (eV) (–EHOMO) | 5.39 | 5.44 |
A (eV) (–ELUMO) | 1.03 | 0.98 |
η (eV) ((I-A)/2) | 2.18 | 2.23 |
σ (eV-1) (1/η) | 0.46 | 0.45 |
χ (eV) ((I+A)/2) | 3.21 | 3.21 |
µ (eV) –((I+A)/2) | -3.21 | -3.21 |
ω (eV) (µ2/2η) | 2.36 | 2.31 |
N (eV-1) (1/ω) | 0.42 | 0.43 |
ΣNmax (-µ/η) | 1.47 | 1.44 |
S (eV-1) (1/2η) | 0.23 | 0.22 |
Experimental and theoretical
1H and 13C NMR chemical shifts of the title
compound topAtom | Experimental | Calculated | Atom | Experimental | Calculated |
C1 | 147.69 | 132.98 | H1 | 7.16 | 6.00 |
C2 | 152.61 | 139.40 | H2 | 7.26-7.22 | 6.34 |
C3 | 119.83 | 100.44 | H3 | 7.82 | 7.25 |
C4 | 124.98 | 108.14 | H (NH) | 10.40 | 10.30 |
C5 | 123.14 | 108.92 | H4 | 6.99 | 5.57 |
C6 | 122.91 | 112.18 | H5 | 6.87 | 5.84 |
C7 | 169.32 | 150.76 | H6 | 7.83 | 8.13 |
C8 | 125.49 | 113.56 | H (OH) | 9.10 | 3.16 |
C9 | 149.97 | 126.31 | H7a | 2.31 | 1.66 |
C10 | 116.54 | 97.67 | H7b | | 1.66 |
C11 | 127.76 | 107.65 | H7c | | 0.90 |
C12 | 129.7602 | 117.31 | H8a | 3.96 | 3.81 |
C13 | 124.80 | 104.61 | H8b | | 2.76 |
C14 | 20.40 | 9.97 | H8c | | 4.45 |
C15 | 61.73 | 49.24 | H9a | 4.06 | 3.55 |
C16 | 56.21 | 43.12 | H9b | | 3.13 |
| | | H9c | | 3.03 |
Intermolecular interactions in the complex according to XRD and
Hirshfeld results topInteraction | H···O (XRD) (Å) | H···O (Hirshfeld) (Å) |
O1—H1···O2 | 1.89 | 1.97 |
The physicochemical properties, druglikeness and pharmacological
properties with SwissADME prediction of I topMW is tmolecular weight (g/mol),
H-A is the number of hydrogen-bond acceptors,
H-D is the number of hydrogen-bond donors,
LogS is solubility,
TPSA is the total polar surface area,
MR is molar refractivity
Natoms is the number of atoms,
WLogP is lipophilicity,
SA is synthetic accessibility,
GI is gastrointestinal,
BBB is blood–brain barrier,
P-gp is P-glycoprotein,
CYP1A2 is cytochrome P450 family 1 subfamily A member 2 (PDB entry 2hi4),
CYP2D6 is cytochrome P450 family 2 subfamily D member 6 (PDB entry 5tft) and
Log Kp is skin permeation (cm s-1) |
Physicochemical properties | | Druglikeness | | Pharmacokinetic properties | |
MW | 299.41 | WLogP | 1.48 | GI | High |
H-A | 4 | SA | 4.09 | BBB | Yes |
TPSA | 67.79 | LogS | -2.84 | CYP1A2 inhibitor | No |
Rotatable bonds | 5 | | | CYP2C6 inhibitor | No |
MR | 81.13 | | | LogKp | -7.22 |
Natoms | 21 | | | | |
Toxicity prediction values and results of compound and its intermediates
calculated by T.E.S.T and Pro-TOX II topAcute toxicity | | Developmental toxicity | | Mutagenicity | |
Oral rat LD50 (mg kg-1) | Fat-head minnow LC50 (96 h) (mg l-1) | Predicted value | Predicted result | Predicted value | Predicted result |
118.19 | 39.55 | 10.04 | Developmental toxicant | 0.75 | Negative |
| | | | | |
Organ toxicity | Toxicity End points | | | | |
Hepatotoxicity | Carcinogenicity | Immunotoxicity | Mutagenicity | Cytotoxicity | LD50 (mg kg-1) |
Inactive | Inactive | Inactive | Inactive | Inactive | 5000 |
Molecular docking energy values for the ligand–protein interaction topProtein ID | Affinity (kcal mol-1) | Est. free energy of binding (kcal mol-1) | Est. inhibition constant, Ki (mM) | vdW + Hbond + desolve energy (kcal mol-1) | Electrostatic energy (kcal mol-1) | Final total internal energy (kcal mol-1) | Torsional free energy (kcal mol-1) | Unbound system's energy (kcal mol-1) | Total internal energy (kcal mol-1) |
1zuw | -6.8 | -4.36 | 0.64 | -5.8 | -0.04 | -2.08 | +1.49 | -2.08 | -5.85 |
5j9b | -6.9 | -4.44 | 0.55 | -5.79 | -0.14 | -2.34 | +1.49 | -2.34 | -5.94 |
4ph6 | -6.1 | -4.02 | 1.13 | 5.51 | +0.00 | -2.32 | +1.49 | -2.32 | -5.51 |
5bmm | -6.6 | -3.96 | 1.24 | -5.12 | -0.34 | -1.99 | +1.49 | -1.99 | -5.46 |
7bye | -6.2 | -5.05 | 0.20 | -6.27 | -0.27 | -1.34 | +1.49 | -1.34 | -6.54 |
4f0v | -6.0 | -3.67 | 2.04 | -5.19 | +0.03 | -1.99 | +1.49 | -1.99 | -5.16 |
1zap | -6.0 | -3.60 | 2.28 | -4.97 | -0.13 | -1.33 | +1.49 | -1.33 | -5.10 |
3k4p | -7.1 | -4.40 | 0.60 | -5.86 | -0.03 | -1.91 | +1.49 | -1.91 | -5.89 |
The minimum inhibition concentrations (MICs) of the
compound and standard drugs top | MIC (µg ml-1) | | | | | | | |
| Gram-staining positive | | | Gram-staining negative | | | Fungi | |
Sample | B. subtilis | S. aureus | E. faecalis | E. coli | K. pneumoniae | P. aeruginosa | A. niger | C. albicans |
Title compound | 128 | 256 | 512 | 512 | 512 | 256 | - | - |
Amoxicillin | >1024 | >1024 | >1024 | >1024 | >1024 | >1024 | - | - |
Tetracycline | 4 | 64 | 64 | 64 | 64 | 64 | - | - |
Ketoconazole | - | - | - | - | - | - | 1 | 2 |