Home Crystal structure of methyl 1-(4-fluorobenzyl)-3-phenyl-1H-pyrazole-5-carboxylate, C18H15FN2O2
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Crystal structure of methyl 1-(4-fluorobenzyl)-3-phenyl-1H-pyrazole-5-carboxylate, C18H15FN2O2

  • Wen-Chang Xu , Jin-Zong You , Yi-Ping Zhang , Xu-Wen Huang , Tang-Qi Li , Sheng-Yue Tong and De-Qiang Qi EMAIL logo
Published/Copyright: February 25, 2017

Abstract

C18H15FN2O2, triclinic, P1̅ (no. 2), a = 7.8272(8) Å, b = 9.6662(10) Å, c = 10.9834(12) Å, α = 107.859(2)°, β = 92.559(2)°, γ = 99.415(2)°, V = 776.31(14) Å3, Z = 2, Rgt(F) = 0.0407, wRref(F2) = 0.1187, T = 296 K.

CCDC no.:: 1530789

The asymmetric unit of the title crystal structure is shown in the figure. Tables 1 and 2 contain details on crystal structure and measurement conditions and a list of the atoms including atomic coordinates and displacement parameters.

Table 1:

Data collection and handling.

Crystal:Colourless block
Size:0.24 × 0.20 × 0.15 mm
Wavelength:Mo Kα radiation (0.71073 Å)
μ:1.0 cm−1
Diffractometer, scan mode:Bruker SMART, φ and ω
2θmax, completeness:51°, >99%
N(hkl)measured, N(hkl)unique, Rint:4513, 2868, 0.020
Criterion for Iobs, N(hkl)gt:Iobs > 2 σ(Iobs), 2047
N(param)refined:210
Programs:Bruker programs [10], SHELX [11]
Table 2:

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2).

AtomxyzUiso*/Ueq
C10.32589(18)0.87363(16)0.30960(14)0.0477(4)
C20.3806(2)0.74106(19)0.25569(17)0.0629(5)
H20.39540.68080.30560.075*
C30.4134(2)0.6975(2)0.12795(19)0.0723(5)
H30.44970.60800.09250.087*
C40.3925(2)0.7857(2)0.05324(18)0.0723(5)
H40.41260.7554−0.03300.087*
C50.3418(2)0.9191(2)0.10692(17)0.0692(5)
H50.33000.98030.05740.083*
C60.3084(2)0.96235(18)0.23367(16)0.0592(4)
H60.27351.05260.26890.071*
C70.28512(18)0.91869(16)0.44392(15)0.0477(4)
C80.23917(19)1.05074(17)0.51632(15)0.0520(4)
H80.22991.13210.48980.062*
C90.21044(18)1.03644(17)0.63412(15)0.0509(4)
C100.1616(2)1.14148(19)0.74919(17)0.0593(4)
C110.2165(2)0.82323(19)0.72494(17)0.0630(5)
H11A0.25660.89280.80990.076*
H11B0.28730.74710.70820.076*
C120.0282(2)0.75261(17)0.72320(15)0.0537(4)
C13−0.0484(2)0.77049(19)0.83652(17)0.0618(5)
H130.01680.82560.91420.074*
C14−0.2202(2)0.70778(19)0.83630(18)0.0655(5)
H14−0.27140.71950.91280.079*
C15−0.3128(2)0.62827(18)0.7209(2)0.0643(5)
C16−0.2427(3)0.60595(19)0.60668(19)0.0719(5)
H16−0.30890.54990.52970.086*
C17−0.0705(2)0.66886(18)0.60836(17)0.0641(5)
H17−0.02000.65490.53150.077*
C180.0928(3)1.3805(2)0.8290(2)0.1000(8)
H18A−0.00161.33910.86760.150*
H18B0.05771.45430.79670.150*
H18C0.19131.42490.89220.150*
F1−0.48454(14)0.56969(12)0.71949(13)0.0901(4)
N10.28546(16)0.82659(14)0.51391(13)0.0549(4)
N20.24077(16)0.90048(15)0.62995(13)0.0540(4)
O10.14536(18)1.12230(15)0.85152(13)0.0829(4)
O20.13973(17)1.26468(14)0.72421(13)0.0774(4)

Source of material

A mixture of methyl 3-phenyl-1H-pyrazole-5-carboxylate (2.02 g, 0.01 mol), 1-(chloromethyl)-4-fluorobenzene (1.44 g, 0.01 mmol) and K2CO3 (1.38 g, 0.01 mmol) in acetonitrile (25 mL) was refluxed for 3 h. The resulting solution was concentrated by vacuum evaporation and the residue was purified by column chromatography on silica gel using ethyl acetate and petroleum ether (1:5, v/v), to obtain the title compound in 78% yields. Crystals were obtained by slow evaporation from ethanol at room temperature.

Experimental details

All H atoms were placed in idealized positions and treated as riding on their parent atoms, with d(C—H) = 0.96 (methyl) and 0.97 Å (methylene), Uiso(H) = 1.5Ueq(C) and d(C—H) = 0.93 Å (aromatic), Uiso(H) = 1.2Ueq(C).

Discussion

In recent years, much effort has been focused on the pyrazole derivatives due to their wide range of biological properties such as antiviral, anti-bacterial, anti-inflammatory, analgesic activities [1], [2], [3], [4]. Pyrazoles were also found to possess inhibitory activities against xanthine oxidase, cyclooxygenase, and alkaline phosphatases [5], [6], [7]. Particular substituents at the pyrazole provide additional biological activities [8, 9] .

In the title crystal structure, all bond lengths and angles are within normal ranges. The pyrazole ring (N1/N2/C9/C8/C7) and the phenyl moiety (C1/C2/C3/C4/C5/C6) are almost coplanar with a dihedral angle of 6.0°. The dihedral angle between the pyrazole ring (N1/N2/C9/C8/C7) and the fluorobenzyl moiety (C12/C13/C14/C15/C16/C17) is 81.9°. The two six-membered rings are twisted by an angle of 87.3°.

Acknowledgement

This work was supported by Project of Science and Technology Department of Zhejiang Province of China (No. 2017C33098).

References

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Received: 2016-9-2
Accepted: 2017-2-7
Published Online: 2017-2-25
Published in Print: 2017-3-1

©2017 Wen-Chang Xu et al., published by De Gruyter.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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