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ISSN: 2056-9890

3-Hy­dr­oxy-2,2-bis­­(1H-pyrazol-1-yl)­cyclo­penta­none

aDepartment of Chemistry, Moscow State University, 119992 Moscow, Russian Federation
*Correspondence e-mail: rybakov20021@yandex.ru

(Received 14 February 2012; accepted 20 February 2012; online 24 February 2012)

The title compound, C11H12N4O2, was unexpectedly obtained in the reaction of α,α′-disubstituted cyclo­penta­none with 1,1,3,3-tetra­meth­oxy­propane in the presence of dioxane saturated with HCl. It belongs to a previously unknown class of gem-bihetaryl ketones which may be useful for screening of new substances with biological activity. In the studied structure, the cyclo­penta­none moiety adopts an envelope conformation, with the hy­droxy-bearing C atom as the flap [deviation from basal plane = 0.643 (3) Å]. The dihedral angle between the two pyrazole rings is 80.02 (8)°. In the crystal, inversion dimers are formed via a pair of O—H⋯N hydrogen bonds.

Related literature

For the medicinal chemistry of chiral carbo- and heterocyclic substituents of pyrazole, see: Bennani et al. (2007[Bennani, Y. L., Campbell, M. G., Dastrup, D. & Huck, E. P. (2007). US Patent Application 20070197526.]); Srivastava et al. (2007[Srivastava, B. K., et al. (2007). J. Med. Chem. 50, 5951-5966.]). For the α-amination of carbonyl compounds, see: List (2002[List, B. (2002). J. Am. Chem. Soc. 124, 5656-5657.]). For standard values of bond lengths in organic compounds, see: Allen et al. (1987[Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1-19.]).

[Scheme 1]

Experimental

Crystal data
  • C11H12N4O2

  • Mr = 232.25

  • Monoclinic, P 21 /c

  • a = 11.4360 (11) Å

  • b = 9.5925 (9) Å

  • c = 11.5968 (11) Å

  • β = 117.25 (2)°

  • V = 1131.0 (3) Å3

  • Z = 4

  • Ag Kα radiation

  • λ = 0.56085 Å

  • μ = 0.06 mm−1

  • T = 295 K

  • 0.20 × 0.20 × 0.20 mm

Data collection
  • Enraf–Nonius CAD-4 diffractometer

  • 2709 measured reflections

  • 2458 independent reflections

  • 1723 reflections with I > 2σ(I)

  • Rint = 0.026

  • 1 standard reflections every 60 min intensity decay: none

Refinement
  • R[F2 > 2σ(F2)] = 0.046

  • wR(F2) = 0.124

  • S = 1.04

  • 2458 reflections

  • 158 parameters

  • H atoms treated by a mixture of independent and constrained refinement

  • Δρmax = 0.18 e Å−3

  • Δρmin = −0.22 e Å−3

Table 1
Hydrogen-bond geometry (Å, °)

D—H⋯A D—H H⋯A DA D—H⋯A
O3—H3a⋯N22bi 0.90 (3) 1.88 (3) 2.781 (2) 179 (2)
Symmetry code: (i) -x+2, -y, -z.

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994[Enraf-Nonius (1994). CAD-4 EXPRESS. Enraf-Nonius, Delft, The Netherlands.]); cell refinement: CAD-4 EXPRESS; data reduction: XCAD4 (Harms & Wocadlo, 1995[Harms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.]); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: ORTEP-3 (Farrugia, 1997[Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565.]); software used to prepare material for publication: WinGX (Farrugia, 1999[Farrugia, L. J. (1999). J. Appl. Cryst. 32, 837-838.]).

Supporting information


Comment top

The pyrazole derivatives with chiral carbo- and heterocyclic substituents at the nitrogen atom have great importance for medicinal chemistry (Bennani et al., 2007; Srivastava et al., 2007). The substituted hydrazine derivatives are suitable and accessible reagents in the reactions with 1,3-dicarbonilyl compounds or their masked forms for the preparation of various N-substituted pyrazoles. We have used for the synthesis of starting hydrazine the reaction of direct stereoselective α-amination of cyclopentanone catalyzed by L-proline with azadicarboxylates as the source of nitrogen (List, 2002). Under these conditions the reaction of α-amination affords to bis-α,α'-aminated ketone derivative 2 (Fig. 1) as a main product, which was transformed to 2,5-di-1H-pyrazol-1-ylcyclopentanone 3 (Fig. 1) by further cyclization with 1,1,3,3-tetramethoxypropane. However, in reaction mixture we have found also two unexpected compounds 4 and 5 (Fig. 1). Formation of the compound 4 can be explained by the competitive intramolecular cyclization of 2 with the participation of ketone group. Appearance of compound 5, which structure was determined by X-ray analysis, is totally unexpected and unusual. It is assumed that such product results from the unusual intermediate formed via uncommon α,α-diamination, that hasn't been previously described, instead of usual α,α'-diamination. The mechanism of formation of 5 is currently under investigation and will be discussed in a further paper.

Compound 5 was obtained by chromatographic separation of complex reaction mixture formed due to the catalyzed by L-proline α-amination of cyclopentanone 1 (Fig. 1) with azadicarboxylates. Chromatographic separation was carried out using a combination of column with silica gel and PTLC. A gradient elution system was developed enabling the resolution of mixture of compounds 4 and 5 and pure product 2,5-di-(1H-pyrazol-1-yl)cyclopentanone 3. Further PTLC of mixture of compounds 4 and 5 afforded to obtain both pure products as individual compounds.

In the title compound (Fig. 2), two essentially planar pyrazole rings (largest deviations from l.s. planes 0.002 (2) and 0.007 (1) Å) form dihedral angle of 80.02 (8)°. Five-membered cyclopentanone ring has envelope conformation with the C3 atom as a flap (deviation from the plane C1/C2/C4/C5 0.643 (3) Å). All bond lengths are within expected ranges (Allen et al., 1987).

In the crystal, title molecules form centrosymmetric dimers by intermolecular H-bonds O3–H3a···N22bi with parameters: O3–H3a = 0.90 (3) Å, H3a···N22bi = 1.88 (3) Å, O3···N22bi = 2.781 (2) Å and angle O3–H3a···N22bi = 179 (2)°. Symmetry code: (i) -x + 2, -y, -z.

Related literature top

For the medicinal chemistry of chiral carbo- and heterocyclic substituents of pyrazole, see: Bennani et al. (2007); Srivastava et al. (2007). For the α-amination of carbonyl compounds, see: List (2002). For standard values of bond lengths in organic compounds, see: Allen et al. (1987).

Experimental top

Tetra-tert-butyl 1,1'-(2-oxocyclopentane-1,3-diyl)dihydrazine-1,2-dicarboxylate 2 was prepared by following procedure: a solution of di-tert-butyl (E)-diazene-1,2-dicarboxylate (1 g, 4.3 mmol) and L-proline (0.5 g, 0.43 mmol) in CH3CN (43 ml) was cooled to 273 K and cyclopentanone (0.64 ml, 6.5 mmol) was added dropwise. The reaction mixture was stirred at 273 K for 24 h, and allowed to warm slowly to room temperature. After 1 h, the mixture was concentrated and the crude residue was purified by column chromatography on silica gel (eluent - petroleum ether: ethyl acetate 5: 1) to afford 1.92 g (61% yield) of required product as a white foam. Spectrum 1H NMR (400 MHz, CDCl3), δ: 1.44 (36H, s, 4 C(CH3)3); 1.74-2.07 (2H, m, CH2); 2.13-2.52 (2H, m, CH2); 4.10 and 4.42 (both 1H, 2 br. s, CH); 6.14 and 6.44 (both 1H, 2 br. s, NH). Spectrum 13C NMR, (400 MHz, CDCl3) δ: 28.0; 28.1; 40.2; 45.0; 54.6; 57.7; 58.2; 80.7; 81.6; 154.8; 155.3; 205.1. MS (ESI), m/z (%): 545 [M+H]+ (0.1), 450 (5), 277 (27), 157 (100), 138 (14). MS (EI, 70 eV), m/z (%): 276 (46), 157 (47), 102 (45), 57 (100). Anal. Calculated for C25H44N4O9: C 55.13, H 8.14, N 10.29. Found: C 55.28, H 8.20, N 10.07.

General procedure for synthesis of 3, 4 and 5. The compound 2 (0.76 g, 1.2 mmol) was dissolved in dioxane (5 ml), and a saturated solution of HCl in dioxane (~12%, 1.82 g, 5 eq.) was added and stirred for 0.5 h. Than 1,1,3,3-tetramethoxypropane (0.59 g, 3.6 mmol, 3 eq.) was added, and the reaction mixture was left at room temperature overnight. Further it was concentrated to dryness under reduced pressure, the residue dissolved in CH2Cl2 (20 ml) and quenched with saturated NaHCO3. The aqueous layers were back-extracted with CH2Cl2 (3×15 ml). The combined organic layers were dried over Na2SO4, filtered, and concentrated to dryness under reduced pressure. The residue was purified by column chromatography on silica gel (eluent - petroleum ether: ethyl acetate 3:1) to afford 0.11 g (15% yield) of required 2,5-di-(pyrazol-1H-yl)cyclopentanone 3 as a light yellow oil. Spectrum 1H NMR (400 MHz, CDCl3), δ: 2.22-2.32 (2H, m, CH2); 2.34-2.45 (2H, m, CH2); 5.31 (2H, m, CH2); 6.36-6.42 (2H, m, H-4 pyrazole); 7.65-7.73 (2H, m, H-5 pyrazole); 7.86-9.92 (2H, m, H-3 pyrazole). Spectrum 13C NMR, (400 MHz, CDCl3), δ: 29.7(2 C); 61.2(2 C); 109.2; 125.6; 133.5; 208.1. MS (ESI), m/z (%): 217 [M+H]+ (1), 149 (100). Anal. Calculated for C11H12N4O: C 61.10; H 5.59, N 25.91. Found: C 59.98; H 5.47; N 25.82.

Further PTLC of mixture of compounds 4 and 5, using a 10:1 mixture of petroleum ether and methanole as eluent, gave both pure products as individual compounds with yelds 18% and 13%, respectively.

The 6,7-dihydro-4H-cyclopenta[c]pyridazine-4-carbaldehyde 4: a colourless oil. Spectrum 1H NMR (400 MHz, CDCl3), δ: 2.65-2.70 (2H, m, CH2), 2.73-2.79 (2H, m, CH2), 6.38 (1H, dd, J1 = 1.8, J2 = 2.5, H-4), 7.67 (1H, d, J1 = 1.5 H-3), 7.87 (1H, t, J1 = 3.1 H-5), 8.54 (1H, dd, J1 = 0.36, J2 = J3 = 2.56, CHO). Spectrum 13C NMR, (400 MHz, CDCl3), δ: 23.93, 35.18, 106.75, 128.68, 141.26, 146.00, 148.15, 200.75. HRMS (ESI, 4,5 mV). Calculated for C8H8N2O: 148.0631, Found, m/z: 148.0636 [M+H]+.

The 3-hydroxy-2,2-di-(pyrazol-1H-yl)cyclopentanone 5: light yellow solid. M.p. 385-386 K (decomp.). Spectrum 1H NMR (400 MHz, CDCl3), δ: 1.98-2.08 (1H, m, CH2), 2.09-2.18 (1H, m, CH2), 2.70 and 2.65 (0.60 H and 0.40 H, both ddd, J1 = 9.3, J2 = 4.6, J3 = 1/2, CH2), 2.89 and 2.84 (0.35 H and 0.65 H, both ddd, J1 = 9.3, J2 = 7.7, J3 = 0.6, CH2), 4.88 (1H, br. s, OH), 5.25 (1H, t, J = 4.6 CHOH), 6.34-6.37 (2H, m, H-4,4' pyrazole), 7.49 (1H, dd, J1 = 2.6, J2 = 0.6, H-5 pyrazole), 7.58 (1H, dd, J1 = 1.8, J2 = 1/2, H-5' pyrazole), 7.62 (1H, dd, J1 = 1.8, J2 = 1/2, H-3 pyrazole), 7.67 (1H, dd, J1 = 2.6, J2 = 0.6, H-3' pyrazole). Spectrum 13C NMR, (400 MHz, CDCl3), δ: 24.96, 34.11, 76.03, 94.68, 107.07, 107.44, 128.44, 130.69, 140.18, 140.21, 203.57. MS (EI, 70 eV), m/z (%): 165 [M+ - Pyr] (62), 137 (22), 119 (72), 95 (100), 81 (22), 69 (18). Anal. Calculated for C11H12N4O2: C 56.89; H 5.21, N 24.12. Found: C 56.40; H 5.68; N 23.98.

The single crystals of title compound suitable for X-ray analysis were grown from methanol solution by slow evaporation at room temperature.

Refinement top

C-bound H atoms were placed in calculated positions with C–H 0.93-0.98 Å and refined as riding with Uiso(H) = 1.2(1.5)Ueq(C). The O-bound H atom forming hydrogen bond was located from difference Fourier map and refined independently.

Computing details top

Data collection: CAD-4 EXPRESS (Enraf–Nonius, 1994); cell refinement: CAD-4 EXPRESS (Enraf–Nonius, 1994); data reduction: XCAD4 (Harms & Wocadlo, 1995); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).

Figures top
[Figure 1] Fig. 1. Synthetic path for title compound.
[Figure 2] Fig. 2. The structure of the title molecule with the atom numbering scheme. Displacement ellipoids are drawn at the 30% probability level. H atoms are presented as small spheres of arbitrary radius.
3-Hydroxy-2,2-bis(1H-pyrazol-1-yl)cyclopentanone top
Crystal data top
C11H12N4O2F(000) = 488
Mr = 232.25Dx = 1.364 Mg m3
Monoclinic, P21/cMelting point = 385–386 K
Hall symbol: -P 2ybcAg Kα radiation, λ = 0.56085 Å
a = 11.4360 (11) ÅCell parameters from 25 reflections
b = 9.5925 (9) Åθ = 10.0–12.0°
c = 11.5968 (11) ŵ = 0.06 mm1
β = 117.25 (2)°T = 295 K
V = 1131.0 (3) Å3Prism, light yellow
Z = 40.20 × 0.20 × 0.20 mm
Data collection top
Enraf–Nonius CAD-4
diffractometer
Rint = 0.026
Radiation source: fine-focus sealed tubeθmax = 21.0°, θmin = 1.6°
Graphite monochromatorh = 1412
non–profiled ω scansk = 012
2709 measured reflectionsl = 014
2458 independent reflections1 standard reflections every 60 min
1723 reflections with I > 2σ(I) intensity decay: none
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.046Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.124H atoms treated by a mixture of independent and constrained refinement
S = 1.04 w = 1/[σ2(Fo2) + (0.0634P)2 + 0.119P]
where P = (Fo2 + 2Fc2)/3
2458 reflections(Δ/σ)max < 0.001
158 parametersΔρmax = 0.18 e Å3
0 restraintsΔρmin = 0.22 e Å3
Crystal data top
C11H12N4O2V = 1131.0 (3) Å3
Mr = 232.25Z = 4
Monoclinic, P21/cAg Kα radiation, λ = 0.56085 Å
a = 11.4360 (11) ŵ = 0.06 mm1
b = 9.5925 (9) ÅT = 295 K
c = 11.5968 (11) Å0.20 × 0.20 × 0.20 mm
β = 117.25 (2)°
Data collection top
Enraf–Nonius CAD-4
diffractometer
Rint = 0.026
2709 measured reflections1 standard reflections every 60 min
2458 independent reflections intensity decay: none
1723 reflections with I > 2σ(I)
Refinement top
R[F2 > 2σ(F2)] = 0.0460 restraints
wR(F2) = 0.124H atoms treated by a mixture of independent and constrained refinement
S = 1.04Δρmax = 0.18 e Å3
2458 reflectionsΔρmin = 0.22 e Å3
158 parameters
Special details top

Geometry. All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'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 > 2σ(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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
C10.8285 (2)0.02907 (18)0.22875 (18)0.0442 (5)
O10.74464 (17)0.04122 (16)0.23414 (15)0.0664 (5)
C20.81692 (16)0.09021 (17)0.09920 (15)0.0334 (4)
C30.96176 (17)0.10037 (18)0.12975 (15)0.0366 (4)
H30.99440.00690.12590.044*
O30.97820 (14)0.18725 (14)0.04063 (13)0.0470 (4)
H3a1.054 (3)0.162 (2)0.040 (2)0.074 (7)*
C41.02716 (19)0.1504 (2)0.26969 (17)0.0479 (5)
H4a1.01110.24900.27480.058*
H4b1.12130.13430.30990.058*
C50.9623 (2)0.0629 (2)0.33416 (17)0.0540 (5)
H5a1.01220.02160.37060.065*
H5b0.95630.11500.40290.065*
N21a0.75682 (14)0.22639 (14)0.08142 (13)0.0355 (3)
N22a0.72893 (16)0.27771 (16)0.17473 (15)0.0467 (4)
C23a0.6800 (2)0.4024 (2)0.1306 (2)0.0574 (6)
H23a0.65140.46390.17440.069*
C24a0.6759 (2)0.4315 (2)0.0121 (2)0.0547 (5)
H24a0.64520.51230.03690.066*
C25a0.72630 (18)0.31694 (19)0.01749 (18)0.0442 (4)
H25a0.73760.30340.09120.053*
N21b0.73500 (14)0.00404 (14)0.01115 (13)0.0368 (3)
N22b0.78713 (15)0.10826 (15)0.04212 (15)0.0428 (4)
C23b0.6833 (2)0.1781 (2)0.1270 (2)0.0532 (5)
H23b0.68850.26040.16680.064*
C24b0.5666 (2)0.1145 (2)0.1493 (2)0.0550 (5)
H24b0.48170.14430.20440.066*
C25b0.60277 (18)0.0009 (2)0.07340 (18)0.0481 (5)
H25b0.54640.06600.06580.058*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
C10.0694 (12)0.0345 (9)0.0456 (10)0.0067 (9)0.0409 (10)0.0039 (8)
O10.0940 (12)0.0587 (9)0.0741 (10)0.0051 (8)0.0623 (10)0.0126 (8)
C20.0427 (9)0.0331 (8)0.0326 (8)0.0013 (7)0.0242 (7)0.0004 (7)
C30.0436 (9)0.0355 (9)0.0368 (9)0.0037 (7)0.0238 (8)0.0013 (7)
O30.0464 (7)0.0543 (8)0.0542 (8)0.0036 (6)0.0350 (7)0.0106 (6)
C40.0529 (12)0.0481 (11)0.0393 (10)0.0043 (9)0.0180 (9)0.0022 (8)
C50.0798 (15)0.0514 (12)0.0347 (10)0.0157 (11)0.0297 (10)0.0068 (9)
N21a0.0444 (8)0.0353 (8)0.0371 (7)0.0049 (6)0.0275 (6)0.0014 (6)
N22a0.0625 (10)0.0443 (9)0.0483 (9)0.0085 (7)0.0385 (8)0.0037 (7)
C23a0.0696 (14)0.0443 (11)0.0681 (14)0.0122 (10)0.0400 (12)0.0082 (10)
C24a0.0587 (13)0.0420 (11)0.0646 (13)0.0100 (9)0.0292 (11)0.0103 (10)
C25a0.0496 (10)0.0450 (10)0.0440 (10)0.0053 (8)0.0266 (9)0.0084 (8)
N21b0.0420 (8)0.0385 (8)0.0399 (8)0.0002 (6)0.0273 (7)0.0042 (6)
N22b0.0503 (9)0.0394 (8)0.0510 (9)0.0012 (7)0.0338 (8)0.0067 (7)
C23b0.0663 (13)0.0465 (11)0.0574 (12)0.0122 (10)0.0373 (11)0.0137 (9)
C24b0.0500 (11)0.0651 (13)0.0543 (11)0.0165 (10)0.0279 (10)0.0114 (10)
C25b0.0417 (10)0.0581 (12)0.0534 (11)0.0016 (9)0.0293 (9)0.0052 (10)
Geometric parameters (Å, º) top
N21a—C25a1.351 (2)C4—C51.523 (3)
N21a—N22a1.3531 (19)C4—H4a0.9700
N21a—C21.446 (2)C4—H4b0.9700
N22a—C23a1.321 (2)C5—C11.493 (3)
C23a—C24a1.382 (3)C5—H5a0.9700
C23a—H23a0.9300C5—H5b0.9700
C24a—C25a1.356 (3)C1—O11.197 (2)
C24a—H24a0.9300N21b—C25b1.345 (2)
C25a—H25a0.9300N21b—N22b1.3568 (18)
C2—N21b1.449 (2)N22b—C23b1.325 (2)
C2—C31.530 (2)C23b—C24b1.380 (3)
C2—C11.561 (2)C23b—H23b0.9300
C3—O31.406 (2)C24b—C25b1.356 (3)
C3—C41.521 (2)C24b—H24b0.9300
C3—H30.9800C25b—H25b0.9300
O3—H3a0.90 (3)
C25a—N21a—N22a112.41 (14)C3—C4—H4a111.0
C25a—N21a—C2128.53 (14)C5—C4—H4a111.0
N22a—N21a—C2119.03 (13)C3—C4—H4b111.0
C23a—N22a—N21a103.46 (15)C5—C4—H4b111.0
N22a—C23a—C24a112.56 (17)H4a—C4—H4b109.0
N22a—C23a—H23a123.7C1—C5—C4105.35 (14)
C24a—C23a—H23a123.7C1—C5—H5a110.7
C25a—C24a—C23a105.26 (17)C4—C5—H5a110.7
C25a—C24a—H24a127.4C1—C5—H5b110.7
C23a—C24a—H24a127.4C4—C5—H5b110.7
N21a—C25a—C24a106.31 (16)H5a—C5—H5b108.8
N21a—C25a—H25a126.8O1—C1—C5128.69 (18)
C24a—C25a—H25a126.8O1—C1—C2123.02 (18)
N21a—C2—N21b108.45 (13)C5—C1—C2108.04 (15)
N21a—C2—C3111.65 (13)C25b—N21b—N22b111.25 (14)
N21b—C2—C3115.74 (13)C25b—N21b—C2126.87 (14)
N21a—C2—C1107.57 (12)N22b—N21b—C2120.12 (14)
N21b—C2—C1111.79 (14)C23b—N22b—N21b104.18 (15)
C3—C2—C1101.26 (13)N22b—C23b—C24b112.13 (18)
O3—C3—C4115.56 (15)N22b—C23b—H23b123.9
O3—C3—C2111.26 (14)C24b—C23b—H23b123.9
C4—C3—C2102.63 (13)C25b—C24b—C23b104.93 (18)
O3—C3—H3109.0C25b—C24b—H24b127.5
C4—C3—H3109.0C23b—C24b—H24b127.5
C2—C3—H3109.0N21b—C25b—C24b107.48 (17)
C3—O3—H3a107.6 (15)N21b—C25b—H25b126.3
C3—C4—C5103.75 (15)C24b—C25b—H25b126.3
C25a—N21a—N22a—C23a0.1 (2)C4—C5—C1—O1177.50 (19)
C2—N21a—N22a—C23a178.13 (16)C4—C5—C1—C23.11 (19)
N21a—N22a—C23a—C24a0.1 (2)N21a—C2—C1—O190.9 (2)
N22a—C23a—C24a—C25a0.3 (3)N21b—C2—C1—O128.1 (2)
N22a—N21a—C25a—C24a0.3 (2)C3—C2—C1—O1151.91 (18)
C2—N21a—C25a—C24a178.07 (16)N21a—C2—C1—C594.37 (16)
C23a—C24a—C25a—N21a0.4 (2)N21b—C2—C1—C5146.68 (15)
C25a—N21a—C2—N21b58.2 (2)C3—C2—C1—C522.86 (17)
N22a—N21a—C2—N21b124.20 (15)N21a—C2—N21b—C25b38.9 (2)
C25a—N21a—C2—C370.5 (2)C3—C2—N21b—C25b165.28 (16)
N22a—N21a—C2—C3107.11 (16)C1—C2—N21b—C25b79.5 (2)
C25a—N21a—C2—C1179.25 (17)N21a—C2—N21b—N22b157.55 (13)
N22a—N21a—C2—C13.1 (2)C3—C2—N21b—N22b31.2 (2)
N21a—C2—C3—O349.79 (17)C1—C2—N21b—N22b84.02 (17)
N21b—C2—C3—O374.91 (18)C25b—N21b—N22b—C23b1.36 (19)
C1—C2—C3—O3164.01 (13)C2—N21b—N22b—C23b167.26 (15)
N21a—C2—C3—C474.37 (16)N21b—N22b—C23b—C24b0.9 (2)
N21b—C2—C3—C4160.92 (14)N22b—C23b—C24b—C25b0.2 (2)
C1—C2—C3—C439.84 (16)N22b—N21b—C25b—C24b1.3 (2)
O3—C3—C4—C5164.39 (15)C2—N21b—C25b—C24b166.00 (16)
C2—C3—C4—C543.13 (18)C23b—C24b—C25b—N21b0.6 (2)
C3—C4—C5—C128.36 (19)
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O3—H3a···N22bi0.90 (3)1.88 (3)2.781 (2)179 (2)
Symmetry code: (i) x+2, y, z.

Experimental details

Crystal data
Chemical formulaC11H12N4O2
Mr232.25
Crystal system, space groupMonoclinic, P21/c
Temperature (K)295
a, b, c (Å)11.4360 (11), 9.5925 (9), 11.5968 (11)
β (°) 117.25 (2)
V3)1131.0 (3)
Z4
Radiation typeAg Kα, λ = 0.56085 Å
µ (mm1)0.06
Crystal size (mm)0.20 × 0.20 × 0.20
Data collection
DiffractometerEnraf–Nonius CAD-4
diffractometer
Absorption correction
No. of measured, independent and
observed [I > 2σ(I)] reflections
2709, 2458, 1723
Rint0.026
(sin θ/λ)max1)0.638
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.046, 0.124, 1.04
No. of reflections2458
No. of parameters158
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.18, 0.22

Computer programs: CAD-4 EXPRESS (Enraf–Nonius, 1994), XCAD4 (Harms & Wocadlo, 1995), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 (Farrugia, 1997), WinGX (Farrugia, 1999).

Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
O3—H3a···N22bi0.90 (3)1.88 (3)2.781 (2)179 (2)
Symmetry code: (i) x+2, y, z.
 

Acknowledgements

This work was supported by the Russian Foundation for Basic Research, grant No. 11-03-00444a. The authors are indebted to the Russian Foundation for Basic Research for covering the licence fee for use of the Cambridge Structural Database.

References

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First citationFarrugia, L. J. (1999). J. Appl. Cryst. 32, 837–838.  CrossRef CAS IUCr Journals Google Scholar
First citationHarms, K. & Wocadlo, S. (1995). XCAD4. University of Marburg, Germany.  Google Scholar
First citationList, B. (2002). J. Am. Chem. Soc. 124, 5656–5657.  Web of Science CrossRef PubMed CAS Google Scholar
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First citationSrivastava, B. K., et al. (2007). J. Med. Chem. 50, 5951–5966.  Web of Science PubMed CAS Google Scholar

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