organic compounds
Methyl 2-{[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene)(4-nitrophenyl)methyl]amino}-3-phenylpropanoate
aCollege of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
*Correspondence e-mail: zxin_tj@126.com
The molecule of the title compound, C27H24N4O5, exists in the keto–enamine tautomeric form, stabilized by an intramolecular N—H⋯O hydrogen bond. An intramolecular C—H⋯·O hydrogen bond also occurs. In the crystal, C—H⋯O hydrogen bonds link the molecules into chains.
Related literature
For general background to et al. (1993); Harrop et al. (2003); Habibi et al. (2007). For antibacterial properties of derived from 4-acyl-5-pyrazolone and their metal complexes, see: Li et al. (1997, 2004). For the antibacterial and biological activity of amino acid see: Xiong et al. (1993). For related structures, see: Wang et al. (2003); Zhang et al. (2005). For synthetic details, see: Remya et al. (2005). For standard bond lengths, see: Allen et al. (1987).
in coordination chemistry, see: WuExperimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); 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
10.1107/S1600536812010343/yk2041sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812010343/yk2041Isup2.hkl
Supporting information file. DOI: 10.1107/S1600536812010343/yk2041Isup3.cml
The title compound was synthesized by refluxing a mixture of 1–phenyl–3—methyl–4–(p–nitro–benzyl)–5–pyrazolone (15 mmol) (Remya et al., 2005) and phenylalanine methyl ester (15 mmol) in ethanol (100 ml) for about 5 h. The product was recrystallized from ethanol, affording pale yellow crystals suitable for X–ray analysis.
All H atoms were positioned geometrically with N—H = 0.86 Å and C—H = 0.93–0.98 Å, and constrained to ride on their parent atoms, with Uiso(H) = xUeq(C,N), where x = 1.5 for methyl H and x = 1.2 for other H atoms.
In recent years,
play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism, and molecular architectures (Wu et al., 1993; Harrop et al., 2003; Habibi et al., 2007). In recent years, the derived from 4–acyl–5–pyrazolone and their metal complexes have been studied widely for their high antibacterial activity (Li et al., 1997, 2004). Both 1–phenyl–3–methyl–4–(p–nitro–benzyl)–5–pyrazolone and its metal complexes are widely used and well known for their analgetic activity (Remya et al., 2005). Amino acid also demonstrate high antibacterial and biological activity (Xiong et al., 1993). Structure of Schiff base derived from 4–acyl–5–pyrazolone and amino acid ester, closely related to the title compound, has been reported (Zhang et al., 2005).The molecular structure of the title compound is presented in Fig. 1, and the numerical results are given in tables below. Atoms O1, C9, C8, C11 and N4 form a plane, the largest deviation being 0.021 (4) Å for atom C11. The dihedral angle between this mean plane and the pyrazolone ring is 1.2 (1)°, indicating that they are essentially coplanar, as seen in 4–{[3,4–dihydro–5–methyl–3–oxo–2–phenyl–2H–pyrazol–4–ylidene]–(phenyl)methyl]amino}–1,5–dimethyl–2–phenyl–1H–pyrazol–3(2H)–one [3.56 (3)°; Wang et al., 2003]. The bond lengths within central part of the molecule lie between typical single- and double- bond lengths, indicating extensive conjugation. A strong intramolecular N—H···O hydrogen bond is observed, stabilizing the enamine-keto tautomeric form. In the
intermolecular C1—H1···O4 hydrogen bonds link the molecules into chains, shown in Fig. 2.For general background to
in coordination chemistry, see: Wu et al. (1993); Harrop et al. (2003); Habibi et al. (2007). For antibacterial properties of derived from 4-acyl-5-pyrazolone and their metal complexes, see: Li et al. (1997, 2004). For the antibacterial and biological activity of amino acid see: Xiong et al. (1993). For related structures, see: Wang et al. (2003); Zhang et al. (2005). For synthetic details, see: Remya et al. (2005). For standard bond lengths, see: Allen et al. (1987).Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); 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).C27H24N4O5 | F(000) = 508 |
Mr = 484.50 | Dx = 1.312 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: P 2yb | Cell parameters from 2125 reflections |
a = 6.7713 (16) Å | θ = 2.5–22.4° |
b = 8.917 (2) Å | µ = 0.09 mm−1 |
c = 20.339 (5) Å | T = 296 K |
β = 92.489 (4)° | Block, colourless |
V = 1226.9 (5) Å3 | 0.20 × 0.16 × 0.12 mm |
Z = 2 |
Bruker APEXII CCD diffractometer | 2315 independent reflections |
Radiation source: fine-focus sealed tube | 1855 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.021 |
φ and ω scan | θmax = 25.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | h = −8→7 |
Tmin = 0.980, Tmax = 0.989 | k = −10→10 |
6305 measured reflections | l = −24→16 |
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)] = 0.040 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.106 | H-atom parameters constrained |
S = 1.07 | w = 1/[σ2(Fo2) + (0.0582P)2 + 0.0914P] where P = (Fo2 + 2Fc2)/3 |
2315 reflections | (Δ/σ)max < 0.001 |
327 parameters | Δρmax = 0.26 e Å−3 |
1 restraint | Δρmin = −0.15 e Å−3 |
C27H24N4O5 | V = 1226.9 (5) Å3 |
Mr = 484.50 | Z = 2 |
Monoclinic, P21 | Mo Kα radiation |
a = 6.7713 (16) Å | µ = 0.09 mm−1 |
b = 8.917 (2) Å | T = 296 K |
c = 20.339 (5) Å | 0.20 × 0.16 × 0.12 mm |
β = 92.489 (4)° |
Bruker APEXII CCD diffractometer | 2315 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2007) | 1855 reflections with I > 2σ(I) |
Tmin = 0.980, Tmax = 0.989 | Rint = 0.021 |
6305 measured reflections |
R[F2 > 2σ(F2)] = 0.040 | 1 restraint |
wR(F2) = 0.106 | H-atom parameters constrained |
S = 1.07 | Δρmax = 0.26 e Å−3 |
2315 reflections | Δρmin = −0.15 e Å−3 |
327 parameters |
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. |
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 > σ(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 | 0.2384 (4) | −0.1136 (2) | 0.34497 (13) | 0.0631 (7) | |
O2 | −0.7694 (4) | 0.4350 (4) | 0.12919 (15) | 0.0803 (9) | |
O3 | −0.5325 (5) | 0.4977 (5) | 0.06804 (18) | 0.1058 (12) | |
O4 | −0.3079 (4) | −0.3075 (3) | 0.31388 (15) | 0.0683 (7) | |
O5 | −0.4842 (5) | −0.3580 (4) | 0.22187 (18) | 0.1000 (11) | |
N1 | 0.3237 (4) | 0.1290 (3) | 0.38007 (13) | 0.0506 (7) | |
N2 | 0.2558 (4) | 0.2758 (3) | 0.36907 (15) | 0.0579 (7) | |
N3 | −0.5986 (4) | 0.4262 (4) | 0.11306 (16) | 0.0645 (8) | |
N4 | −0.0863 (4) | −0.0999 (3) | 0.26012 (15) | 0.0551 (7) | |
H4 | −0.0086 | −0.1510 | 0.2861 | 0.066* | |
C1 | 0.6183 (5) | −0.0145 (5) | 0.4130 (2) | 0.0709 (11) | |
H1 | 0.5785 | −0.0909 | 0.3842 | 0.085* | |
C2 | 0.7941 (6) | −0.0259 (6) | 0.4492 (2) | 0.0879 (14) | |
H2 | 0.8727 | −0.1104 | 0.4444 | 0.105* | |
C3 | 0.8550 (7) | 0.0833 (8) | 0.4916 (3) | 0.1011 (17) | |
H3 | 0.9744 | 0.0747 | 0.5156 | 0.121* | |
C4 | 0.7377 (8) | 0.2064 (9) | 0.4983 (3) | 0.118 (2) | |
H4A | 0.7776 | 0.2803 | 0.5283 | 0.142* | |
C5 | 0.5612 (7) | 0.2250 (6) | 0.4621 (2) | 0.0901 (15) | |
H5 | 0.4852 | 0.3112 | 0.4661 | 0.108* | |
C6 | 0.5025 (5) | 0.1097 (4) | 0.41960 (16) | 0.0534 (8) | |
C7 | 0.1051 (5) | 0.2653 (4) | 0.32700 (17) | 0.0508 (8) | |
C8 | 0.0671 (4) | 0.1120 (3) | 0.30814 (15) | 0.0437 (7) | |
C9 | 0.2132 (4) | 0.0246 (4) | 0.34512 (16) | 0.0474 (8) | |
C10 | 0.0044 (6) | 0.4069 (4) | 0.3050 (3) | 0.0824 (13) | |
H10A | 0.0556 | 0.4893 | 0.3310 | 0.124* | |
H10B | −0.1352 | 0.3979 | 0.3106 | 0.124* | |
H10C | 0.0281 | 0.4245 | 0.2595 | 0.124* | |
C11 | −0.0733 (4) | 0.0480 (4) | 0.26523 (15) | 0.0449 (8) | |
C12 | −0.2120 (4) | 0.1434 (3) | 0.22373 (15) | 0.0423 (7) | |
C13 | −0.1507 (5) | 0.2096 (4) | 0.16670 (17) | 0.0514 (8) | |
H13 | −0.0236 | 0.1915 | 0.1530 | 0.062* | |
C14 | −0.2753 (5) | 0.3019 (4) | 0.12978 (17) | 0.0545 (9) | |
H14 | −0.2339 | 0.3465 | 0.0914 | 0.065* | |
C15 | −0.4630 (4) | 0.3264 (4) | 0.15121 (17) | 0.0489 (8) | |
C16 | −0.5284 (5) | 0.2614 (4) | 0.20677 (18) | 0.0593 (9) | |
H16 | −0.6562 | 0.2791 | 0.2199 | 0.071* | |
C17 | −0.4023 (5) | 0.1686 (4) | 0.24343 (17) | 0.0564 (9) | |
H17 | −0.4454 | 0.1231 | 0.2814 | 0.068* | |
C18 | −0.2165 (5) | −0.1856 (4) | 0.21573 (19) | 0.0591 (9) | |
H18 | −0.3020 | −0.1133 | 0.1920 | 0.071* | |
C19 | −0.3515 (6) | −0.2928 (4) | 0.2507 (2) | 0.0636 (10) | |
C20 | −0.4402 (7) | −0.4046 (5) | 0.3506 (3) | 0.0948 (15) | |
H20A | −0.5692 | −0.3599 | 0.3509 | 0.142* | |
H20B | −0.3884 | −0.4159 | 0.3950 | 0.142* | |
H20C | −0.4494 | −0.5012 | 0.3299 | 0.142* | |
C21 | −0.0987 (6) | −0.2697 (4) | 0.1635 (2) | 0.0731 (11) | |
H21A | −0.0013 | −0.3339 | 0.1857 | 0.088* | |
H21B | −0.1884 | −0.3331 | 0.1375 | 0.088* | |
C22 | 0.0040 (6) | −0.1652 (4) | 0.1186 (2) | 0.0635 (10) | |
C23 | −0.0986 (7) | −0.0965 (5) | 0.0657 (2) | 0.0777 (12) | |
H23 | −0.2311 | −0.1194 | 0.0570 | 0.093* | |
C24 | −0.0046 (8) | 0.0060 (6) | 0.0261 (2) | 0.0874 (14) | |
H24 | −0.0743 | 0.0508 | −0.0091 | 0.105* | |
C25 | 0.1903 (8) | 0.0413 (6) | 0.0387 (3) | 0.0911 (14) | |
H25 | 0.2528 | 0.1109 | 0.0126 | 0.109* | |
C26 | 0.2911 (7) | −0.0259 (6) | 0.0894 (3) | 0.0903 (14) | |
H26 | 0.4238 | −0.0028 | 0.0976 | 0.108* | |
C27 | 0.2016 (6) | −0.1274 (5) | 0.1291 (2) | 0.0816 (13) | |
H27 | 0.2746 | −0.1717 | 0.1637 | 0.098* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0668 (15) | 0.0396 (15) | 0.0809 (17) | 0.0042 (11) | −0.0176 (12) | 0.0071 (12) |
O2 | 0.0508 (15) | 0.087 (2) | 0.103 (2) | 0.0157 (14) | −0.0078 (14) | 0.0168 (17) |
O3 | 0.086 (2) | 0.128 (3) | 0.104 (2) | 0.033 (2) | 0.0136 (17) | 0.062 (2) |
O4 | 0.0676 (15) | 0.0495 (15) | 0.088 (2) | −0.0010 (13) | 0.0039 (14) | 0.0021 (14) |
O5 | 0.093 (2) | 0.072 (2) | 0.132 (3) | −0.0315 (19) | −0.0316 (19) | 0.004 (2) |
N1 | 0.0474 (14) | 0.0488 (16) | 0.0552 (16) | −0.0002 (13) | −0.0033 (12) | −0.0010 (14) |
N2 | 0.0578 (16) | 0.0465 (16) | 0.0688 (19) | 0.0048 (14) | −0.0034 (14) | −0.0125 (14) |
N3 | 0.0571 (18) | 0.064 (2) | 0.072 (2) | 0.0105 (15) | −0.0038 (15) | 0.0147 (17) |
N4 | 0.0621 (17) | 0.0311 (15) | 0.0703 (19) | 0.0030 (13) | −0.0170 (14) | 0.0037 (13) |
C1 | 0.066 (2) | 0.071 (3) | 0.074 (3) | 0.007 (2) | −0.0150 (19) | −0.001 (2) |
C2 | 0.064 (2) | 0.095 (4) | 0.102 (3) | 0.009 (3) | −0.020 (2) | 0.012 (3) |
C3 | 0.062 (3) | 0.145 (5) | 0.094 (4) | −0.008 (3) | −0.028 (2) | 0.003 (4) |
C4 | 0.089 (4) | 0.153 (6) | 0.109 (4) | −0.005 (4) | −0.039 (3) | −0.045 (4) |
C5 | 0.073 (3) | 0.104 (4) | 0.092 (3) | 0.004 (2) | −0.018 (2) | −0.034 (3) |
C6 | 0.0458 (17) | 0.070 (2) | 0.0444 (19) | −0.0047 (18) | 0.0009 (13) | 0.0002 (17) |
C7 | 0.0468 (18) | 0.0410 (17) | 0.065 (2) | 0.0064 (15) | 0.0035 (15) | −0.0057 (16) |
C8 | 0.0424 (16) | 0.0355 (17) | 0.0530 (19) | 0.0032 (14) | −0.0005 (13) | 0.0001 (14) |
C9 | 0.0440 (18) | 0.046 (2) | 0.052 (2) | 0.0001 (14) | 0.0027 (14) | −0.0001 (15) |
C10 | 0.080 (3) | 0.046 (2) | 0.119 (4) | 0.016 (2) | −0.025 (2) | −0.018 (2) |
C11 | 0.0440 (17) | 0.0440 (19) | 0.0469 (19) | 0.0036 (14) | 0.0046 (14) | 0.0020 (14) |
C12 | 0.0439 (16) | 0.0315 (15) | 0.0514 (18) | 0.0007 (13) | 0.0008 (13) | −0.0007 (14) |
C13 | 0.0421 (17) | 0.0472 (18) | 0.065 (2) | 0.0044 (15) | 0.0073 (15) | 0.0034 (17) |
C14 | 0.0540 (19) | 0.053 (2) | 0.057 (2) | 0.0031 (16) | 0.0082 (15) | 0.0122 (16) |
C15 | 0.0441 (16) | 0.0418 (18) | 0.060 (2) | 0.0067 (14) | −0.0031 (15) | 0.0012 (15) |
C16 | 0.0439 (17) | 0.069 (2) | 0.065 (2) | 0.0101 (18) | 0.0069 (15) | 0.011 (2) |
C17 | 0.0525 (18) | 0.060 (2) | 0.057 (2) | 0.0054 (17) | 0.0089 (15) | 0.0169 (16) |
C18 | 0.067 (2) | 0.0341 (17) | 0.075 (3) | 0.0029 (16) | −0.0178 (19) | −0.0030 (17) |
C19 | 0.064 (2) | 0.0346 (17) | 0.092 (3) | 0.0031 (17) | −0.007 (2) | −0.0013 (19) |
C20 | 0.088 (3) | 0.063 (3) | 0.136 (4) | −0.007 (2) | 0.036 (3) | 0.011 (3) |
C21 | 0.086 (3) | 0.045 (2) | 0.087 (3) | 0.0055 (19) | −0.007 (2) | −0.009 (2) |
C22 | 0.072 (2) | 0.047 (2) | 0.070 (2) | 0.0085 (18) | −0.0045 (19) | −0.0138 (18) |
C23 | 0.086 (3) | 0.076 (3) | 0.070 (3) | 0.012 (2) | −0.016 (2) | −0.016 (2) |
C24 | 0.117 (4) | 0.091 (4) | 0.053 (2) | 0.014 (3) | −0.003 (2) | −0.005 (2) |
C25 | 0.106 (4) | 0.088 (3) | 0.081 (3) | 0.011 (3) | 0.025 (3) | −0.003 (3) |
C26 | 0.067 (3) | 0.091 (3) | 0.113 (4) | 0.007 (3) | 0.012 (3) | −0.003 (3) |
C27 | 0.069 (3) | 0.079 (3) | 0.096 (3) | 0.017 (2) | −0.011 (2) | 0.002 (3) |
O1—C9 | 1.244 (4) | C11—C12 | 1.500 (4) |
O2—N3 | 1.218 (4) | C12—C13 | 1.381 (4) |
O3—N3 | 1.217 (4) | C12—C17 | 1.384 (4) |
O4—C19 | 1.313 (5) | C13—C14 | 1.378 (5) |
O4—C20 | 1.473 (5) | C13—H13 | 0.9300 |
O5—C19 | 1.201 (4) | C14—C15 | 1.379 (4) |
N1—C9 | 1.374 (4) | C14—H14 | 0.9300 |
N1—N2 | 1.403 (4) | C15—C16 | 1.361 (5) |
N1—C6 | 1.434 (4) | C16—C17 | 1.384 (5) |
N2—C7 | 1.306 (4) | C16—H16 | 0.9300 |
N3—C15 | 1.474 (4) | C17—H17 | 0.9300 |
N4—C11 | 1.326 (4) | C18—C19 | 1.520 (6) |
N4—C18 | 1.452 (4) | C18—C21 | 1.550 (6) |
N4—H4 | 0.8600 | C18—H18 | 0.9800 |
C1—C6 | 1.367 (6) | C20—H20A | 0.9600 |
C1—C2 | 1.376 (5) | C20—H20B | 0.9600 |
C1—H1 | 0.9300 | C20—H20C | 0.9600 |
C2—C3 | 1.352 (8) | C21—C22 | 1.497 (6) |
C2—H2 | 0.9300 | C21—H21A | 0.9700 |
C3—C4 | 1.365 (8) | C21—H21B | 0.9700 |
C3—H3 | 0.9300 | C22—C27 | 1.387 (6) |
C4—C5 | 1.386 (7) | C22—C23 | 1.396 (6) |
C4—H4A | 0.9300 | C23—C24 | 1.391 (7) |
C5—C6 | 1.391 (6) | C23—H23 | 0.9300 |
C5—H5 | 0.9300 | C24—C25 | 1.370 (7) |
C7—C8 | 1.440 (5) | C24—H24 | 0.9300 |
C7—C10 | 1.494 (5) | C25—C26 | 1.352 (7) |
C8—C11 | 1.385 (4) | C25—H25 | 0.9300 |
C8—C9 | 1.445 (4) | C26—C27 | 1.371 (7) |
C10—H10A | 0.9600 | C26—H26 | 0.9300 |
C10—H10B | 0.9600 | C27—H27 | 0.9300 |
C10—H10C | 0.9600 | ||
C19—O4—C20 | 116.1 (3) | C12—C13—H13 | 119.5 |
C9—N1—N2 | 112.5 (2) | C13—C14—C15 | 118.3 (3) |
C9—N1—C6 | 129.5 (3) | C13—C14—H14 | 120.9 |
N2—N1—C6 | 117.7 (3) | C15—C14—H14 | 120.9 |
C7—N2—N1 | 106.2 (3) | C16—C15—C14 | 122.2 (3) |
O3—N3—O2 | 123.6 (3) | C16—C15—N3 | 118.5 (3) |
O3—N3—C15 | 118.1 (3) | C14—C15—N3 | 119.4 (3) |
O2—N3—C15 | 118.2 (3) | C15—C16—C17 | 119.1 (3) |
C11—N4—C18 | 127.5 (3) | C15—C16—H16 | 120.4 |
C11—N4—H4 | 116.3 | C17—C16—H16 | 120.4 |
C18—N4—H4 | 116.3 | C16—C17—C12 | 120.1 (3) |
C6—C1—C2 | 119.6 (4) | C16—C17—H17 | 119.9 |
C6—C1—H1 | 120.2 | C12—C17—H17 | 119.9 |
C2—C1—H1 | 120.2 | N4—C18—C19 | 113.7 (3) |
C3—C2—C1 | 121.3 (5) | N4—C18—C21 | 111.3 (3) |
C3—C2—H2 | 119.3 | C19—C18—C21 | 110.8 (3) |
C1—C2—H2 | 119.3 | N4—C18—H18 | 106.9 |
C2—C3—C4 | 118.7 (4) | C19—C18—H18 | 106.9 |
C2—C3—H3 | 120.6 | C21—C18—H18 | 106.9 |
C4—C3—H3 | 120.6 | O5—C19—O4 | 124.1 (4) |
C3—C4—C5 | 122.3 (5) | O5—C19—C18 | 121.9 (4) |
C3—C4—H4A | 118.8 | O4—C19—C18 | 114.0 (3) |
C5—C4—H4A | 118.8 | O4—C20—H20A | 109.5 |
C4—C5—C6 | 117.3 (5) | O4—C20—H20B | 109.5 |
C4—C5—H5 | 121.4 | H20A—C20—H20B | 109.5 |
C6—C5—H5 | 121.4 | O4—C20—H20C | 109.5 |
C1—C6—C5 | 120.7 (3) | H20A—C20—H20C | 109.5 |
C1—C6—N1 | 121.1 (3) | H20B—C20—H20C | 109.5 |
C5—C6—N1 | 118.1 (4) | C22—C21—C18 | 112.6 (3) |
N2—C7—C8 | 111.6 (3) | C22—C21—H21A | 109.1 |
N2—C7—C10 | 117.9 (3) | C18—C21—H21A | 109.1 |
C8—C7—C10 | 130.4 (3) | C22—C21—H21B | 109.1 |
C11—C8—C7 | 132.0 (3) | C18—C21—H21B | 109.1 |
C11—C8—C9 | 122.8 (3) | H21A—C21—H21B | 107.8 |
C7—C8—C9 | 105.3 (3) | C27—C22—C23 | 117.2 (4) |
O1—C9—N1 | 126.9 (3) | C27—C22—C21 | 121.8 (4) |
O1—C9—C8 | 128.6 (3) | C23—C22—C21 | 120.9 (4) |
N1—C9—C8 | 104.4 (3) | C24—C23—C22 | 120.6 (4) |
C7—C10—H10A | 109.5 | C24—C23—H23 | 119.7 |
C7—C10—H10B | 109.5 | C22—C23—H23 | 119.7 |
H10A—C10—H10B | 109.5 | C25—C24—C23 | 120.3 (5) |
C7—C10—H10C | 109.5 | C25—C24—H24 | 119.9 |
H10A—C10—H10C | 109.5 | C23—C24—H24 | 119.9 |
H10B—C10—H10C | 109.5 | C26—C25—C24 | 119.4 (5) |
N4—C11—C8 | 120.0 (3) | C26—C25—H25 | 120.3 |
N4—C11—C12 | 118.9 (3) | C24—C25—H25 | 120.3 |
C8—C11—C12 | 121.1 (3) | C25—C26—C27 | 121.4 (5) |
C13—C12—C17 | 119.4 (3) | C25—C26—H26 | 119.3 |
C13—C12—C11 | 120.7 (3) | C27—C26—H26 | 119.3 |
C17—C12—C11 | 119.8 (3) | C26—C27—C22 | 121.2 (4) |
C14—C13—C12 | 120.9 (3) | C26—C27—H27 | 119.4 |
C14—C13—H13 | 119.5 | C22—C27—H27 | 119.4 |
C9—N1—N2—C7 | −0.7 (4) | N4—C11—C12—C17 | 81.3 (4) |
C6—N1—N2—C7 | 173.7 (3) | C8—C11—C12—C17 | −99.0 (4) |
C6—C1—C2—C3 | 0.3 (7) | C17—C12—C13—C14 | 1.0 (5) |
C1—C2—C3—C4 | 0.3 (9) | C11—C12—C13—C14 | −177.5 (3) |
C2—C3—C4—C5 | −1.7 (10) | C12—C13—C14—C15 | −0.1 (5) |
C3—C4—C5—C6 | 2.4 (9) | C13—C14—C15—C16 | −0.7 (5) |
C2—C1—C6—C5 | 0.5 (6) | C13—C14—C15—N3 | 179.3 (3) |
C2—C1—C6—N1 | 176.6 (4) | O3—N3—C15—C16 | 171.5 (4) |
C4—C5—C6—C1 | −1.7 (7) | O2—N3—C15—C16 | −7.0 (5) |
C4—C5—C6—N1 | −178.0 (4) | O3—N3—C15—C14 | −8.5 (5) |
C9—N1—C6—C1 | 18.5 (5) | O2—N3—C15—C14 | 173.0 (3) |
N2—N1—C6—C1 | −154.8 (3) | C14—C15—C16—C17 | 0.6 (6) |
C9—N1—C6—C5 | −165.3 (4) | N3—C15—C16—C17 | −179.4 (3) |
N2—N1—C6—C5 | 21.4 (5) | C15—C16—C17—C12 | 0.3 (6) |
N1—N2—C7—C8 | −0.2 (4) | C13—C12—C17—C16 | −1.1 (5) |
N1—N2—C7—C10 | −178.9 (3) | C11—C12—C17—C16 | 177.4 (3) |
N2—C7—C8—C11 | −179.3 (3) | C11—N4—C18—C19 | −121.9 (4) |
C10—C7—C8—C11 | −0.9 (7) | C11—N4—C18—C21 | 112.2 (4) |
N2—C7—C8—C9 | 1.0 (4) | C20—O4—C19—O5 | −3.5 (5) |
C10—C7—C8—C9 | 179.4 (4) | C20—O4—C19—C18 | 177.1 (3) |
N2—N1—C9—O1 | 179.9 (3) | N4—C18—C19—O5 | 170.7 (4) |
C6—N1—C9—O1 | 6.3 (5) | C21—C18—C19—O5 | −63.1 (5) |
N2—N1—C9—C8 | 1.3 (3) | N4—C18—C19—O4 | −10.0 (4) |
C6—N1—C9—C8 | −172.3 (3) | C21—C18—C19—O4 | 116.3 (4) |
C11—C8—C9—O1 | 0.4 (5) | N4—C18—C21—C22 | −64.3 (4) |
C7—C8—C9—O1 | −179.9 (3) | C19—C18—C21—C22 | 168.2 (3) |
C11—C8—C9—N1 | 179.0 (3) | C18—C21—C22—C27 | 97.0 (5) |
C7—C8—C9—N1 | −1.3 (3) | C18—C21—C22—C23 | −80.1 (5) |
C18—N4—C11—C8 | −176.7 (3) | C27—C22—C23—C24 | −0.4 (6) |
C18—N4—C11—C12 | 3.1 (5) | C21—C22—C23—C24 | 176.9 (4) |
C7—C8—C11—N4 | −174.9 (4) | C22—C23—C24—C25 | −0.3 (7) |
C9—C8—C11—N4 | 4.7 (5) | C23—C24—C25—C26 | 0.9 (7) |
C7—C8—C11—C12 | 5.3 (5) | C24—C25—C26—C27 | −0.8 (7) |
C9—C8—C11—C12 | −175.1 (3) | C25—C26—C27—C22 | 0.1 (7) |
N4—C11—C12—C13 | −100.2 (4) | C23—C22—C27—C26 | 0.5 (6) |
C8—C11—C12—C13 | 79.5 (4) | C21—C22—C27—C26 | −176.8 (4) |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···O1 | 0.86 | 2.04 | 2.738 (4) | 138 |
C1—H1···O1 | 0.93 | 2.41 | 3.001 (4) | 121 |
C20—H20A···O1i | 0.96 | 2.55 | 3.385 (5) | 145 |
Symmetry code: (i) x−1, y, z. |
Experimental details
Crystal data | |
Chemical formula | C27H24N4O5 |
Mr | 484.50 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 296 |
a, b, c (Å) | 6.7713 (16), 8.917 (2), 20.339 (5) |
β (°) | 92.489 (4) |
V (Å3) | 1226.9 (5) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.20 × 0.16 × 0.12 |
Data collection | |
Diffractometer | Bruker APEXII CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2007) |
Tmin, Tmax | 0.980, 0.989 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 6305, 2315, 1855 |
Rint | 0.021 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.040, 0.106, 1.07 |
No. of reflections | 2315 |
No. of parameters | 327 |
No. of restraints | 1 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.26, −0.15 |
Computer programs: APEX2 (Bruker, 2007), SAINT (Bruker, 2007), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···O1 | 0.86 | 2.04 | 2.738 (4) | 138 |
C1—H1···O1 | 0.93 | 2.41 | 3.001 (4) | 121 |
C20—H20A···O1i | 0.96 | 2.55 | 3.385 (5) | 145.0 |
Symmetry code: (i) x−1, y, z. |
References
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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.
In recent years, Schiff bases play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism, and molecular architectures (Wu et al., 1993; Harrop et al., 2003; Habibi et al., 2007). In recent years, the Schiff bases derived from 4–acyl–5–pyrazolone and their metal complexes have been studied widely for their high antibacterial activity (Li et al., 1997, 2004). Both 1–phenyl–3–methyl–4–(p–nitro–benzyl)–5–pyrazolone and its metal complexes are widely used and well known for their analgetic activity (Remya et al., 2005). Amino acid esters also demonstrate high antibacterial and biological activity (Xiong et al., 1993). Structure of Schiff base derived from 4–acyl–5–pyrazolone and amino acid ester, closely related to the title compound, has been reported (Zhang et al., 2005).
The molecular structure of the title compound is presented in Fig. 1, and the numerical results are given in tables below. Atoms O1, C9, C8, C11 and N4 form a plane, the largest deviation being 0.021 (4) Å for atom C11. The dihedral angle between this mean plane and the pyrazolone ring is 1.2 (1)°, indicating that they are essentially coplanar, as seen in 4–{[3,4–dihydro–5–methyl–3–oxo–2–phenyl–2H–pyrazol–4–ylidene]–(phenyl)methyl]amino}–1,5–dimethyl–2–phenyl–1H–pyrazol–3(2H)–one [3.56 (3)°; Wang et al., 2003]. The bond lengths within central part of the molecule lie between typical single- and double- bond lengths, indicating extensive conjugation. A strong intramolecular N—H···O hydrogen bond is observed, stabilizing the enamine-keto tautomeric form. In the crystal structure, intermolecular C1—H1···O4 hydrogen bonds link the molecules into chains, shown in Fig. 2.