organic compounds
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3-(2,5-Dimethylfuran-3-yl)-1H-pyrazol-5-ol–ethyl 3-(propan-2-ylidene)carbazate (1/1)
aX-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia, and bDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri, Mangalore 574 199, India
*Correspondence e-mail: hkfun@usm.my
In the title 1:1 adduct, C6H12N2O2·C9H10N2O2, the maximum deviations from the 1H-pyrazole-5-ol and furan rings are 0.014 (1) and 0.003 (1) Å, respectively. The dihedral angle formed between the 1H-pyrazol-5-ol and 2,5-dimethylfuran rings is 21.07 (5)°. In the crystal, pairs of intermolecular O—H⋯N hydrogen bonds form inversion dimers of the 3-(2,5-dimethylfuran-3-yl)-1H-pyrazol-5-ol species, generating R22(8) ring motifs. Molecules are further linked by intermolecular N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds to form ribbons along the [010] direction containing bifurcated R12(5) and R21(7) ring motifs. Further stablization of the packing is provided by weak π–π [centroid–centroid distance = 3.5686 (15) Å] and C—H⋯π interactions.
Related literature
For pyrazole derivatives and their microbial activities, see: Ragavan et al. (2009, 2010). For a related structure, see: Shahani et al. (2010). For ring conformations, see: Cremer & Pople (1975). For hydrogen-bond motifs, see: Bernstein et al. (1995). For bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
Experimental
Crystal data
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Refinement
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Data collection: APEX2 (Bruker, 2009); cell SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supporting information
https://doi.org/10.1107/S1600536810043886/hb5696sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810043886/hb5696Isup2.hkl
The compound has been synthesized using the method available in the literature (Ragavan et al.,2009) and recrystallized using the ethanol-chloroform 1:1 mixture to yield colourless blocks of (I). Yield: 78%. M.p. 225.5–227.5 °C.
The hydrogen atoms bound to C atoms were positioned geometrically [C–H = 0.96–0.97 Å] with Uiso(H) =1.2 or 1.5Uiso(C). A rotating group model was applied to the methyl groups. The hydrogen atoms attached to the N and O atoms were located from the difference map and refined freely, [N–H = 0.872 (18)–0.883 (18) Å, O–H = 0.93 Å].
Antibacterial and antifungal activities of the azoles are most widely studied and some of them are in clinical practice as anti-microbial agents. However, the azole-resistant strain had led to the development of new antimicrobial compounds. In particular, pyrazole derivatives are extensively studied and used as antimicrobial agents. Pyrazole is an important class of
and many pyrazole derivatives are reported to have the broad spectrum of biological properties such as anti-inflammatory, antifungal, herbicidal, anti-tumour, cytotoxic, molecular modelling and antiviral activities. Pyrazole derivatives also act as antiangiogenic agents, A3 adenosine receptor antagonists, neuropeptide YY5 receptor antagonists, kinase inhibitor for treatment of type 2 diabetes, hyperlipidemia, obesity, and thrombopiotinmimetics. Recently urea derivatives of pyrazoles have been reported as potent inhibitors of p38 kinase. Since the high of halogens (particularly chlorine and fluorine) in the aromatic part of the drug molecules play an important role in enhancing their biological activity, we are interested to have 4-fluoro or 4-chloro substitution in the aryls of 1,5-diaryl pyrazoles. As part of our on-going research aiming the synthesis of new antimicrobial compounds, we have reported the synthesis of novel pyrazole derivatives and their microbial activities (Ragavan et al., 2009; 2010). The structure of the title compound is presented here.The
of the title compound, (Fig. 1), consists of one 3-(2,5-dimethylfuran-3-yl)-1H-pyrazol-5-ol and one ethyl2- (propan-2-ylidene)hydrazine carboxylate. The maximum deviations in 1H- pyrazole-5-ol (N1/N2/C1–C3/O2) and furan (C4–C7/O1) rings are 0.014 (1) and 0.003 (1) Å at atoms C2 and C7, respectively. The dihedral angles formed between the 1H-pyrazole-5-ol ring and 2,5-dimethylfuran ring (C4–C9/O1) is 21.07 (5)°. The bond lengths (Allen et al.,1987) and angles are within normal ranges and comparable to those closely related structures (Shahani et al., 2010).In the crystal packing (Fig. 2), pairs of intermolecular N2—H1O2···O2 hydrogen bonds form dimers with neighbouring molecules, generating R22(8) ring motif. Furthermore N1—H1N1···O4, N1—H1N1···N4, N3—H1N3···O2, O2—H1O2···N2 and C5—H5A···O4 hydrogen bonds (Table 1) link the molecules into ribbons along [010] direction with bifurcated R12(5) and R21(7) ring motifs. The π–π and C—H···π interactions [Cg1···Cg1 = 3.5686 (15) Å, symmetry code, 2-X, 1-Y, –Z], Cg1 is the centroids of the 1H-pyrazole ring (N1/N2/C1—C3) and Cg2 is the centroids of the 1H-pyrazole ring (N1/N2/C1–C3).
is stablilized by weakFor pyrazole derivatives and their microbial activities, see: Ragavan et al. (2009, 2010). For a related structure, see: Shahani et al. (2010). For ring conformations, see: Cremer & Pople (1975). For hydrogen-bond motifs, see: Bernstein et al. (1995). For bond-length data, see: Allen et al. (1987). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986).
Data collection: APEX2 (Bruker, 2009); cell
SAINT (Bruker, 2009); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).Fig. 1. The molecular structure of the title compound, showing 50% probability displacement ellipsoids. | |
Fig. 2. The crystal packing of the title compound, viewed along c axis, showing ribbons along the [010] direction.. |
C6H12N2O2·C9H10N2O2 | Z = 2 |
Mr = 322.37 | F(000) = 344 |
Triclinic, P1 | Dx = 1.269 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 8.6988 (17) Å | Cell parameters from 7782 reflections |
b = 9.4830 (19) Å | θ = 2.6–31.7° |
c = 11.837 (4) Å | µ = 0.09 mm−1 |
α = 107.293 (4)° | T = 100 K |
β = 100.354 (5)° | Block, colourless |
γ = 108.346 (3)° | 0.40 × 0.21 × 0.13 mm |
V = 843.7 (3) Å3 |
Bruker APEXII DUO CCD diffractometer | 3264 independent reflections |
Radiation source: fine-focus sealed tube | 2911 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.026 |
φ and ω scans | θmax = 26.0°, θmin = 1.9° |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | h = −10→10 |
Tmin = 0.964, Tmax = 0.988 | k = −11→11 |
13322 measured reflections | l = −14→14 |
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)] = 0.033 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.099 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.11 | w = 1/[σ2(Fo2) + (0.045P)2 + 0.2939P] where P = (Fo2 + 2Fc2)/3 |
3264 reflections | (Δ/σ)max < 0.001 |
225 parameters | Δρmax = 0.29 e Å−3 |
0 restraints | Δρmin = −0.22 e Å−3 |
C6H12N2O2·C9H10N2O2 | γ = 108.346 (3)° |
Mr = 322.37 | V = 843.7 (3) Å3 |
Triclinic, P1 | Z = 2 |
a = 8.6988 (17) Å | Mo Kα radiation |
b = 9.4830 (19) Å | µ = 0.09 mm−1 |
c = 11.837 (4) Å | T = 100 K |
α = 107.293 (4)° | 0.40 × 0.21 × 0.13 mm |
β = 100.354 (5)° |
Bruker APEXII DUO CCD diffractometer | 3264 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2009) | 2911 reflections with I > 2σ(I) |
Tmin = 0.964, Tmax = 0.988 | Rint = 0.026 |
13322 measured reflections |
R[F2 > 2σ(F2)] = 0.033 | 0 restraints |
wR(F2) = 0.099 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.11 | Δρmax = 0.29 e Å−3 |
3264 reflections | Δρmin = −0.22 e Å−3 |
225 parameters |
Experimental. The crystal was placed in the cold stream of an Oxford Cyrosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. |
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 | 0.72298 (12) | 0.49965 (12) | −0.03577 (8) | 0.0272 (2) | |
O2 | 1.41202 (12) | 1.13027 (10) | 0.43430 (9) | 0.0232 (2) | |
N1 | 1.21447 (13) | 0.71967 (13) | 0.29969 (10) | 0.0197 (2) | |
N2 | 1.34466 (13) | 0.85605 (12) | 0.38574 (9) | 0.0190 (2) | |
C1 | 1.31074 (15) | 0.97528 (15) | 0.36573 (11) | 0.0185 (3) | |
C2 | 1.16205 (16) | 0.91874 (15) | 0.26795 (12) | 0.0211 (3) | |
H2A | 1.1136 | 0.9791 | 0.2366 | 0.025* | |
C3 | 1.10286 (15) | 0.75316 (15) | 0.22806 (11) | 0.0185 (3) | |
C4 | 0.95185 (16) | 0.62751 (15) | 0.13126 (11) | 0.0201 (3) | |
C5 | 0.87164 (16) | 0.46384 (15) | 0.11997 (12) | 0.0222 (3) | |
H5A | 0.9076 | 0.4169 | 0.1725 | 0.027* | |
C6 | 0.73478 (17) | 0.39202 (16) | 0.01874 (12) | 0.0252 (3) | |
C7 | 0.85745 (16) | 0.64286 (16) | 0.03429 (12) | 0.0240 (3) | |
C8 | 0.8742 (2) | 0.77483 (18) | −0.01199 (14) | 0.0344 (3) | |
H8A | 0.9922 | 0.8414 | 0.0089 | 0.052* | |
H8B | 0.8166 | 0.8382 | 0.0257 | 0.052* | |
H8C | 0.8246 | 0.7301 | −0.1005 | 0.052* | |
C9 | 0.59939 (19) | 0.22804 (18) | −0.04258 (14) | 0.0342 (3) | |
H9A | 0.6186 | 0.1632 | 0.0027 | 0.051* | |
H9B | 0.6011 | 0.1810 | −0.1260 | 0.051* | |
H9C | 0.4909 | 0.2338 | −0.0441 | 0.051* | |
O3 | 0.08857 (11) | 0.22838 (11) | 0.42456 (9) | 0.0236 (2) | |
O4 | 0.06433 (11) | 0.42612 (11) | 0.36063 (9) | 0.0244 (2) | |
N3 | 0.29597 (14) | 0.35988 (13) | 0.36500 (10) | 0.0209 (2) | |
N4 | 0.37772 (13) | 0.48909 (12) | 0.33504 (10) | 0.0201 (2) | |
C10 | −0.21443 (18) | 0.07821 (18) | 0.31978 (15) | 0.0346 (3) | |
H10A | −0.3233 | 0.0471 | 0.3338 | 0.052* | |
H10B | −0.1904 | −0.0153 | 0.2871 | 0.052* | |
H10C | −0.2154 | 0.1302 | 0.2615 | 0.052* | |
C11 | −0.07996 (17) | 0.19197 (17) | 0.44018 (13) | 0.0267 (3) | |
H11A | −0.0984 | 0.2905 | 0.4695 | 0.032* | |
H11B | −0.0878 | 0.1443 | 0.5021 | 0.032* | |
C12 | 0.14196 (16) | 0.34622 (14) | 0.38212 (11) | 0.0194 (3) | |
C13 | 0.52197 (16) | 0.50193 (15) | 0.31731 (11) | 0.0212 (3) | |
C14 | 0.60676 (18) | 0.38865 (18) | 0.32513 (14) | 0.0300 (3) | |
H14A | 0.6155 | 0.3777 | 0.4039 | 0.045* | |
H14B | 0.7183 | 0.4299 | 0.3169 | 0.045* | |
H14C | 0.5408 | 0.2856 | 0.2596 | 0.045* | |
C15 | 0.61073 (17) | 0.64131 (16) | 0.28562 (13) | 0.0249 (3) | |
H15A | 0.5436 | 0.7044 | 0.2843 | 0.037* | |
H15B | 0.6259 | 0.6025 | 0.2054 | 0.037* | |
H15C | 0.7196 | 0.7063 | 0.3468 | 0.037* | |
H1N1 | 1.211 (2) | 0.626 (2) | 0.3012 (15) | 0.033 (4)* | |
H1N3 | 0.347 (2) | 0.304 (2) | 0.3897 (15) | 0.031 (4)* | |
H1O2 | 1.496 (3) | 1.138 (2) | 0.500 (2) | 0.057 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0228 (5) | 0.0284 (5) | 0.0227 (5) | 0.0062 (4) | 0.0009 (4) | 0.0068 (4) |
O2 | 0.0222 (5) | 0.0154 (4) | 0.0274 (5) | 0.0068 (4) | −0.0018 (4) | 0.0078 (4) |
N1 | 0.0200 (5) | 0.0146 (5) | 0.0221 (5) | 0.0065 (4) | 0.0026 (4) | 0.0061 (4) |
N2 | 0.0178 (5) | 0.0157 (5) | 0.0215 (5) | 0.0065 (4) | 0.0028 (4) | 0.0061 (4) |
C1 | 0.0190 (6) | 0.0173 (6) | 0.0212 (6) | 0.0085 (5) | 0.0067 (5) | 0.0080 (5) |
C2 | 0.0209 (6) | 0.0212 (6) | 0.0231 (6) | 0.0115 (5) | 0.0041 (5) | 0.0090 (5) |
C3 | 0.0174 (6) | 0.0216 (6) | 0.0187 (6) | 0.0095 (5) | 0.0070 (5) | 0.0079 (5) |
C4 | 0.0190 (6) | 0.0218 (6) | 0.0194 (6) | 0.0090 (5) | 0.0073 (5) | 0.0059 (5) |
C5 | 0.0215 (6) | 0.0224 (6) | 0.0217 (6) | 0.0084 (5) | 0.0074 (5) | 0.0069 (5) |
C6 | 0.0233 (7) | 0.0258 (7) | 0.0243 (7) | 0.0080 (5) | 0.0089 (5) | 0.0073 (5) |
C7 | 0.0211 (6) | 0.0246 (7) | 0.0221 (6) | 0.0075 (5) | 0.0043 (5) | 0.0060 (5) |
C8 | 0.0364 (8) | 0.0329 (8) | 0.0294 (7) | 0.0115 (7) | −0.0003 (6) | 0.0139 (6) |
C9 | 0.0279 (7) | 0.0295 (8) | 0.0323 (8) | 0.0019 (6) | 0.0049 (6) | 0.0067 (6) |
O3 | 0.0212 (5) | 0.0240 (5) | 0.0319 (5) | 0.0101 (4) | 0.0109 (4) | 0.0159 (4) |
O4 | 0.0234 (5) | 0.0235 (5) | 0.0314 (5) | 0.0129 (4) | 0.0088 (4) | 0.0133 (4) |
N3 | 0.0214 (5) | 0.0195 (5) | 0.0282 (6) | 0.0108 (5) | 0.0090 (4) | 0.0139 (5) |
N4 | 0.0217 (5) | 0.0185 (5) | 0.0218 (5) | 0.0084 (4) | 0.0064 (4) | 0.0093 (4) |
C10 | 0.0259 (7) | 0.0307 (8) | 0.0430 (9) | 0.0076 (6) | 0.0118 (6) | 0.0112 (7) |
C11 | 0.0232 (7) | 0.0288 (7) | 0.0340 (7) | 0.0104 (6) | 0.0152 (6) | 0.0156 (6) |
C12 | 0.0218 (6) | 0.0168 (6) | 0.0187 (6) | 0.0079 (5) | 0.0045 (5) | 0.0063 (5) |
C13 | 0.0221 (6) | 0.0226 (6) | 0.0196 (6) | 0.0100 (5) | 0.0061 (5) | 0.0079 (5) |
C14 | 0.0310 (7) | 0.0334 (8) | 0.0411 (8) | 0.0207 (6) | 0.0195 (6) | 0.0215 (7) |
C15 | 0.0234 (7) | 0.0261 (7) | 0.0293 (7) | 0.0108 (5) | 0.0100 (5) | 0.0138 (6) |
O1—C7 | 1.3719 (16) | C9—H9C | 0.9600 |
O1—C6 | 1.3792 (17) | O3—C12 | 1.3445 (15) |
O2—C1 | 1.3468 (15) | O3—C11 | 1.4558 (15) |
O2—H1O2 | 0.93 (2) | O4—C12 | 1.2124 (15) |
N1—C3 | 1.3493 (16) | N3—C12 | 1.3625 (17) |
N1—N2 | 1.3685 (14) | N3—N4 | 1.3905 (15) |
N1—H1N1 | 0.883 (18) | N3—H1N3 | 0.872 (18) |
N2—C1 | 1.3288 (16) | N4—C13 | 1.2834 (17) |
C1—C2 | 1.3988 (18) | C10—C11 | 1.502 (2) |
C2—C3 | 1.3844 (18) | C10—H10A | 0.9600 |
C2—H2A | 0.9300 | C10—H10B | 0.9600 |
C3—C4 | 1.4561 (18) | C10—H10C | 0.9600 |
C4—C7 | 1.3597 (19) | C11—H11A | 0.9700 |
C4—C5 | 1.4405 (18) | C11—H11B | 0.9700 |
C5—C6 | 1.3448 (19) | C13—C14 | 1.4967 (19) |
C5—H5A | 0.9300 | C13—C15 | 1.4967 (18) |
C6—C9 | 1.4835 (19) | C14—H14A | 0.9600 |
C7—C8 | 1.486 (2) | C14—H14B | 0.9600 |
C8—H8A | 0.9600 | C14—H14C | 0.9600 |
C8—H8B | 0.9600 | C15—H15A | 0.9600 |
C8—H8C | 0.9600 | C15—H15B | 0.9600 |
C9—H9A | 0.9600 | C15—H15C | 0.9600 |
C9—H9B | 0.9600 | ||
C7—O1—C6 | 107.17 (10) | H9A—C9—H9C | 109.5 |
C1—O2—H1O2 | 110.5 (13) | H9B—C9—H9C | 109.5 |
C3—N1—N2 | 111.95 (10) | C12—O3—C11 | 115.88 (10) |
C3—N1—H1N1 | 129.8 (11) | C12—N3—N4 | 116.20 (11) |
N2—N1—H1N1 | 118.1 (11) | C12—N3—H1N3 | 119.0 (11) |
C1—N2—N1 | 104.49 (10) | N4—N3—H1N3 | 123.2 (11) |
N2—C1—O2 | 121.83 (11) | C13—N4—N3 | 116.67 (11) |
N2—C1—C2 | 111.95 (11) | C11—C10—H10A | 109.5 |
O2—C1—C2 | 126.22 (11) | C11—C10—H10B | 109.5 |
C3—C2—C1 | 104.84 (11) | H10A—C10—H10B | 109.5 |
C3—C2—H2A | 127.6 | C11—C10—H10C | 109.5 |
C1—C2—H2A | 127.6 | H10A—C10—H10C | 109.5 |
N1—C3—C2 | 106.77 (11) | H10B—C10—H10C | 109.5 |
N1—C3—C4 | 122.08 (11) | O3—C11—C10 | 110.77 (11) |
C2—C3—C4 | 131.15 (12) | O3—C11—H11A | 109.5 |
C7—C4—C5 | 106.49 (11) | C10—C11—H11A | 109.5 |
C7—C4—C3 | 126.43 (12) | O3—C11—H11B | 109.5 |
C5—C4—C3 | 127.08 (12) | C10—C11—H11B | 109.5 |
C6—C5—C4 | 106.74 (12) | H11A—C11—H11B | 108.1 |
C6—C5—H5A | 126.6 | O4—C12—O3 | 125.45 (12) |
C4—C5—H5A | 126.6 | O4—C12—N3 | 125.31 (12) |
C5—C6—O1 | 109.97 (12) | O3—C12—N3 | 109.22 (10) |
C5—C6—C9 | 134.00 (13) | N4—C13—C14 | 125.22 (12) |
O1—C6—C9 | 116.02 (12) | N4—C13—C15 | 116.82 (12) |
C4—C7—O1 | 109.62 (12) | C14—C13—C15 | 117.96 (11) |
C4—C7—C8 | 134.17 (13) | C13—C14—H14A | 109.5 |
O1—C7—C8 | 116.15 (11) | C13—C14—H14B | 109.5 |
C7—C8—H8A | 109.5 | H14A—C14—H14B | 109.5 |
C7—C8—H8B | 109.5 | C13—C14—H14C | 109.5 |
H8A—C8—H8B | 109.5 | H14A—C14—H14C | 109.5 |
C7—C8—H8C | 109.5 | H14B—C14—H14C | 109.5 |
H8A—C8—H8C | 109.5 | C13—C15—H15A | 109.5 |
H8B—C8—H8C | 109.5 | C13—C15—H15B | 109.5 |
C6—C9—H9A | 109.5 | H15A—C15—H15B | 109.5 |
C6—C9—H9B | 109.5 | C13—C15—H15C | 109.5 |
H9A—C9—H9B | 109.5 | H15A—C15—H15C | 109.5 |
C6—C9—H9C | 109.5 | H15B—C15—H15C | 109.5 |
C3—N1—N2—C1 | 0.09 (13) | C7—O1—C6—C5 | 0.06 (14) |
N1—N2—C1—O2 | 179.58 (11) | C7—O1—C6—C9 | 179.60 (11) |
N1—N2—C1—C2 | −0.44 (14) | C5—C4—C7—O1 | 0.55 (14) |
N2—C1—C2—C3 | 0.62 (14) | C3—C4—C7—O1 | −178.68 (11) |
O2—C1—C2—C3 | −179.40 (11) | C5—C4—C7—C8 | −176.26 (16) |
N2—N1—C3—C2 | 0.30 (14) | C3—C4—C7—C8 | 4.5 (2) |
N2—N1—C3—C4 | −178.86 (10) | C6—O1—C7—C4 | −0.39 (14) |
C1—C2—C3—N1 | −0.53 (13) | C6—O1—C7—C8 | 177.06 (12) |
C1—C2—C3—C4 | 178.51 (12) | C12—N3—N4—C13 | −179.21 (11) |
N1—C3—C4—C7 | −161.23 (13) | C12—O3—C11—C10 | 84.10 (14) |
C2—C3—C4—C7 | 19.8 (2) | C11—O3—C12—O4 | 2.70 (18) |
N1—C3—C4—C5 | 19.70 (19) | C11—O3—C12—N3 | −176.27 (10) |
C2—C3—C4—C5 | −159.23 (13) | N4—N3—C12—O4 | 8.26 (18) |
C7—C4—C5—C6 | −0.50 (14) | N4—N3—C12—O3 | −172.77 (10) |
C3—C4—C5—C6 | 178.72 (12) | N3—N4—C13—C14 | 0.65 (19) |
C4—C5—C6—O1 | 0.27 (14) | N3—N4—C13—C15 | −179.72 (11) |
C4—C5—C6—C9 | −179.15 (15) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N1···O4i | 0.883 (18) | 2.304 (19) | 3.0363 (19) | 140.1 (16) |
N1—H1N1···N4i | 0.883 (18) | 2.288 (19) | 3.043 (2) | 143.1 (16) |
N3—H1N3···O2ii | 0.872 (18) | 2.076 (19) | 2.9293 (19) | 166.7 (18) |
O2—H1O2···N2iii | 0.93 (2) | 1.73 (2) | 2.6602 (17) | 176 (2) |
C5—H5A···O4i | 0.93 | 2.35 | 3.212 (2) | 153 |
C11—H11B···Cg2iv | 0.97 | 2.71 | 3.50 (2) | 138 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y−1, z; (iii) −x+3, −y+2, −z+1; (iv) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C6H12N2O2·C9H10N2O2 |
Mr | 322.37 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 100 |
a, b, c (Å) | 8.6988 (17), 9.4830 (19), 11.837 (4) |
α, β, γ (°) | 107.293 (4), 100.354 (5), 108.346 (3) |
V (Å3) | 843.7 (3) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.09 |
Crystal size (mm) | 0.40 × 0.21 × 0.13 |
Data collection | |
Diffractometer | Bruker APEXII DUO CCD |
Absorption correction | Multi-scan (SADABS; Bruker, 2009) |
Tmin, Tmax | 0.964, 0.988 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 13322, 3264, 2911 |
Rint | 0.026 |
(sin θ/λ)max (Å−1) | 0.617 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.033, 0.099, 1.11 |
No. of reflections | 3264 |
No. of parameters | 225 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.29, −0.22 |
Computer programs: APEX2 (Bruker, 2009), SAINT (Bruker, 2009), SHELXTL (Sheldrick, 2008) and PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1N1···O4i | 0.883 (18) | 2.304 (19) | 3.0363 (19) | 140.1 (16) |
N1—H1N1···N4i | 0.883 (18) | 2.288 (19) | 3.043 (2) | 143.1 (16) |
N3—H1N3···O2ii | 0.872 (18) | 2.076 (19) | 2.9293 (19) | 166.7 (18) |
O2—H1O2···N2iii | 0.93 (2) | 1.73 (2) | 2.6602 (17) | 176 (2) |
C5—H5A···O4i | 0.93 | 2.35 | 3.212 (2) | 153 |
C11—H11B···Cg2iv | 0.97 | 2.71 | 3.498 (20) | 138 |
Symmetry codes: (i) x+1, y, z; (ii) x−1, y−1, z; (iii) −x+3, −y+2, −z+1; (iv) −x+1, −y+1, −z+1. |
Footnotes
‡Thomson Reuters ResearcherID: A-3561-2009.
Acknowledgements
HKF and TS thank Universiti Sains Malaysia (USM) for the Research University Grant No. 1001/PFIZIK/811160. TS also thanks USM for the award of a research fellowship. VV is grateful to DST–India for funding through the Young Scientist Scheme (Fast Track Proposal).
References
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Antibacterial and antifungal activities of the azoles are most widely studied and some of them are in clinical practice as anti-microbial agents. However, the azole-resistant strain had led to the development of new antimicrobial compounds. In particular, pyrazole derivatives are extensively studied and used as antimicrobial agents. Pyrazole is an important class of heterocyclic compounds and many pyrazole derivatives are reported to have the broad spectrum of biological properties such as anti-inflammatory, antifungal, herbicidal, anti-tumour, cytotoxic, molecular modelling and antiviral activities. Pyrazole derivatives also act as antiangiogenic agents, A3 adenosine receptor antagonists, neuropeptide YY5 receptor antagonists, kinase inhibitor for treatment of type 2 diabetes, hyperlipidemia, obesity, and thrombopiotinmimetics. Recently urea derivatives of pyrazoles have been reported as potent inhibitors of p38 kinase. Since the high electronegativity of halogens (particularly chlorine and fluorine) in the aromatic part of the drug molecules play an important role in enhancing their biological activity, we are interested to have 4-fluoro or 4-chloro substitution in the aryls of 1,5-diaryl pyrazoles. As part of our on-going research aiming the synthesis of new antimicrobial compounds, we have reported the synthesis of novel pyrazole derivatives and their microbial activities (Ragavan et al., 2009; 2010). The structure of the title compound is presented here.
The asymmetric unit of the title compound, (Fig. 1), consists of one 3-(2,5-dimethylfuran-3-yl)-1H-pyrazol-5-ol and one ethyl2- (propan-2-ylidene)hydrazine carboxylate. The maximum deviations in 1H- pyrazole-5-ol (N1/N2/C1–C3/O2) and furan (C4–C7/O1) rings are 0.014 (1) and 0.003 (1) Å at atoms C2 and C7, respectively. The dihedral angles formed between the 1H-pyrazole-5-ol ring and 2,5-dimethylfuran ring (C4–C9/O1) is 21.07 (5)°. The bond lengths (Allen et al.,1987) and angles are within normal ranges and comparable to those closely related structures (Shahani et al., 2010).
In the crystal packing (Fig. 2), pairs of intermolecular N2—H1O2···O2 hydrogen bonds form dimers with neighbouring molecules, generating R22(8) ring motif. Furthermore N1—H1N1···O4, N1—H1N1···N4, N3—H1N3···O2, O2—H1O2···N2 and C5—H5A···O4 hydrogen bonds (Table 1) link the molecules into ribbons along [010] direction with bifurcated R12(5) and R21(7) ring motifs. The crystal structure is stablilized by weak π–π and C—H···π interactions [Cg1···Cg1 = 3.5686 (15) Å, symmetry code, 2-X, 1-Y, –Z], Cg1 is the centroids of the 1H-pyrazole ring (N1/N2/C1—C3) and Cg2 is the centroids of the 1H-pyrazole ring (N1/N2/C1–C3).