organic compounds
8-Methyl-2-[4-(trifluoromethyl)phenyl]-8H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine methanol disolvate
aDepartment of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore, bDepartment of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore, and cPerm State Pharmaceutical Academy, 2 Polevaya Street, Perm 614990, Russian Federation
*Correspondence e-mail: dolzhenkoav@gmail.com
In the title compound, C14H10F3N7·2CH4O, the heterocyclic ring system is essentially planar (r.m.s. deviation = 0.009 Å) and makes a dihedral angle of 6.91 (8)° with the attached benzene ring. In the crystal, the main molecules form centrosymmetric R22(8) dimers via pairs of N—H⋯N hydrogen bonds between the amino groups and pyrimidine N atoms. One of the independent methanol molecules and its inversion equivalent are linked to the dimers via O—H⋯N and N—H⋯O hydrogen bonds, forming R44(16) graph-set motifs. The dimers along with the hydrogen-bonded methanol molecules are stacked along the a axis, with π–π interactions between the pyrazole and triazole rings [centroid–centroid distance = 3.4953 (10) Å].
Related literature
For reviews on pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine adenosine receptor antagonists, see: Baraldi et al. (2006); Cacciari et al. (2007). For the general method used for the synthesis of the title compound, see: Dolzhenko et al. (2009); Cheong et al. (2010). For the crystal structures of related pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines, see: Ferretti et al. (2006); Mezheritsky et al. (2004); Tyurin et al. (2005); Xiao & Shi (2007). For graph-set analysis of hydrogen bonding, see: Bernstein et al. (1995).
Experimental
Crystal data
|
Refinement
|
Data collection: SMART (Bruker, 2001); cell SAINT (Bruker, 2001); 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/S1600536810024591/ci5111sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536810024591/ci5111Isup2.hkl
8-Methyl-2-(4-trifluoromethylphenyl)-8H-pyrazolo[4,3-e][1,2,4]triazolo][1,5-c]pyrimidin-5-amine was prepared from 8-methyl-2-(4-trifluoromethylphenyl)-8H-pyrazolo[4,3-e][1,2,4]triazolo][1,5-c]pyrimidine (Dolzhenko et al., 2009) similarly to the described method (Cheong et al., 2010). The detail procedure will be reported elsewhere. The crystals suitable for crystallographic analysis were grown by recrystallization from methanol. m.p. 573 K.
All C-bound H atoms were positioned geometrically and included in the
in riding-motion approximation [0.94 Å for CH of aromatic systems, 0.97 Å for methyl groups, and 0.83 Å for hydroxyl groups; Uiso(H) = 1.2Ueq(CAr) and Uiso(H) = 1.5Ueq(O,CMe)] while the amino group H atoms were located in a difference map and refined freely.Data collection: SMART (Bruker, 2001); cell
SAINT (Bruker, 2001); data reduction: SAINT (Bruker, 2001); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXS97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C14H10F3N7·2CH4O | F(000) = 824 |
Mr = 397.37 | Dx = 1.471 Mg m−3 |
Monoclinic, P21/n | Melting point: 573 K |
Hall symbol: -P 2yn | Mo Kα radiation, λ = 0.71073 Å |
a = 4.6179 (3) Å | Cell parameters from 4421 reflections |
b = 17.1149 (10) Å | θ = 2.4–27.2° |
c = 22.7627 (13) Å | µ = 0.12 mm−1 |
β = 94.323 (1)° | T = 223 K |
V = 1793.93 (19) Å3 | Block, colourless |
Z = 4 | 0.58 × 0.32 × 0.12 mm |
Bruker SMART APEX CCD diffractometer | 4076 independent reflections |
Radiation source: fine-focus sealed tube | 3538 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.027 |
ϕ and ω scans | θmax = 27.5°, θmin = 1.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 2001) | h = −5→5 |
Tmin = 0.932, Tmax = 0.985 | k = −21→22 |
12385 measured reflections | l = −23→29 |
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)] = 0.054 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.145 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | w = 1/[σ2(Fo2) + (0.0746P)2 + 0.7421P] where P = (Fo2 + 2Fc2)/3 |
4076 reflections | (Δ/σ)max = 0.001 |
266 parameters | Δρmax = 0.35 e Å−3 |
0 restraints | Δρmin = −0.21 e Å−3 |
C14H10F3N7·2CH4O | V = 1793.93 (19) Å3 |
Mr = 397.37 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 4.6179 (3) Å | µ = 0.12 mm−1 |
b = 17.1149 (10) Å | T = 223 K |
c = 22.7627 (13) Å | 0.58 × 0.32 × 0.12 mm |
β = 94.323 (1)° |
Bruker SMART APEX CCD diffractometer | 4076 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 2001) | 3538 reflections with I > 2σ(I) |
Tmin = 0.932, Tmax = 0.985 | Rint = 0.027 |
12385 measured reflections |
R[F2 > 2σ(F2)] = 0.054 | 0 restraints |
wR(F2) = 0.145 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.05 | Δρmax = 0.35 e Å−3 |
4076 reflections | Δρmin = −0.21 e Å−3 |
266 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 > 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. |
x | y | z | Uiso*/Ueq | ||
O1S | 0.5063 (3) | 0.68580 (11) | 0.08136 (7) | 0.0581 (4) | |
H1S | 0.4507 | 0.6882 | 0.0459 | 0.087* | |
C1S | 0.8079 (5) | 0.68768 (18) | 0.08766 (13) | 0.0684 (7) | |
H1S1 | 0.8735 | 0.7415 | 0.0887 | 0.103* | |
H1S2 | 0.8852 | 0.6611 | 0.0546 | 0.103* | |
H1S3 | 0.8756 | 0.6617 | 0.1240 | 0.103* | |
C2S | 0.1594 (6) | 0.15803 (13) | 0.27649 (11) | 0.0581 (6) | |
H2S1 | 0.2028 | 0.1917 | 0.3103 | 0.087* | |
H2S2 | 0.1779 | 0.1038 | 0.2887 | 0.087* | |
H2S3 | −0.0374 | 0.1678 | 0.2602 | 0.087* | |
F1 | 1.4952 (3) | 0.39342 (8) | 0.43457 (6) | 0.0616 (4) | |
F2 | 1.2039 (3) | 0.48312 (8) | 0.45616 (5) | 0.0550 (4) | |
F3 | 1.5562 (3) | 0.50993 (9) | 0.40469 (6) | 0.0642 (4) | |
N1 | −0.3122 (3) | 0.23144 (9) | 0.07561 (7) | 0.0362 (3) | |
N2 | −0.2997 (3) | 0.29563 (9) | 0.04026 (7) | 0.0375 (4) | |
N3 | −0.0193 (3) | 0.41222 (8) | 0.04749 (6) | 0.0365 (4) | |
N4 | 0.3019 (3) | 0.41895 (8) | 0.13254 (6) | 0.0296 (3) | |
N5 | 0.5146 (3) | 0.45421 (8) | 0.16847 (6) | 0.0309 (3) | |
N6 | 0.3934 (3) | 0.33542 (8) | 0.20487 (6) | 0.0286 (3) | |
N7 | 0.2815 (4) | 0.51915 (10) | 0.06445 (8) | 0.0461 (4) | |
H7A | 0.402 (5) | 0.5454 (13) | 0.0863 (10) | 0.044 (6)* | |
H7B | 0.204 (5) | 0.5402 (14) | 0.0312 (11) | 0.052 (6)* | |
C1 | −0.1317 (4) | 0.23497 (10) | 0.12400 (8) | 0.0343 (4) | |
H1 | −0.1081 | 0.1971 | 0.1539 | 0.041* | |
C2 | 0.0145 (4) | 0.30557 (9) | 0.12153 (7) | 0.0301 (4) | |
C3 | −0.0985 (4) | 0.34097 (10) | 0.06864 (7) | 0.0322 (4) | |
C4 | 0.1813 (4) | 0.45034 (10) | 0.07964 (7) | 0.0336 (4) | |
C5 | 0.2331 (4) | 0.34778 (9) | 0.15530 (7) | 0.0276 (3) | |
C6 | 0.5597 (4) | 0.40191 (9) | 0.21105 (7) | 0.0269 (3) | |
C7 | 0.7738 (3) | 0.41460 (9) | 0.26155 (7) | 0.0274 (3) | |
C8 | 0.9154 (4) | 0.48630 (10) | 0.26875 (7) | 0.0326 (4) | |
H8 | 0.8786 | 0.5261 | 0.2407 | 0.039* | |
C9 | 1.1098 (4) | 0.49892 (10) | 0.31706 (8) | 0.0343 (4) | |
H9 | 1.2041 | 0.5474 | 0.3221 | 0.041* | |
C10 | 1.1650 (4) | 0.43965 (10) | 0.35808 (7) | 0.0307 (4) | |
C11 | 1.0299 (4) | 0.36786 (10) | 0.35067 (8) | 0.0343 (4) | |
H11 | 1.0710 | 0.3277 | 0.3782 | 0.041* | |
C12 | 0.8337 (4) | 0.35550 (10) | 0.30243 (8) | 0.0331 (4) | |
H12 | 0.7407 | 0.3068 | 0.2974 | 0.040* | |
C13 | 1.3561 (4) | 0.45625 (11) | 0.41268 (8) | 0.0368 (4) | |
C14 | −0.5043 (5) | 0.16731 (12) | 0.05670 (10) | 0.0464 (5) | |
H14A | −0.4241 | 0.1396 | 0.0245 | 0.070* | |
H14B | −0.6940 | 0.1879 | 0.0436 | 0.070* | |
H14C | −0.5229 | 0.1317 | 0.0894 | 0.070* | |
O2S | 0.3553 (4) | 0.17366 (9) | 0.23347 (8) | 0.0626 (5) | |
H2S | 0.3819 | 0.2215 | 0.2314 | 0.094* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1S | 0.0507 (9) | 0.0792 (12) | 0.0434 (8) | −0.0125 (8) | −0.0029 (7) | −0.0038 (8) |
C1S | 0.0505 (14) | 0.0805 (18) | 0.0727 (17) | 0.0068 (12) | −0.0050 (12) | −0.0207 (14) |
C2S | 0.0740 (16) | 0.0445 (12) | 0.0554 (13) | 0.0039 (11) | 0.0027 (12) | 0.0023 (10) |
F1 | 0.0664 (9) | 0.0601 (8) | 0.0537 (8) | 0.0231 (7) | −0.0252 (6) | −0.0033 (6) |
F2 | 0.0506 (7) | 0.0806 (9) | 0.0333 (6) | 0.0123 (6) | 0.0006 (5) | −0.0145 (6) |
F3 | 0.0544 (8) | 0.0857 (10) | 0.0502 (7) | −0.0294 (7) | −0.0117 (6) | 0.0062 (7) |
N1 | 0.0395 (8) | 0.0307 (8) | 0.0381 (8) | −0.0050 (6) | 0.0010 (6) | −0.0035 (6) |
N2 | 0.0428 (9) | 0.0336 (8) | 0.0348 (8) | −0.0033 (6) | −0.0047 (6) | −0.0025 (6) |
N3 | 0.0491 (9) | 0.0286 (7) | 0.0300 (7) | −0.0014 (6) | −0.0081 (6) | 0.0023 (6) |
N4 | 0.0391 (8) | 0.0237 (7) | 0.0254 (7) | −0.0008 (5) | −0.0027 (5) | −0.0003 (5) |
N5 | 0.0385 (8) | 0.0260 (7) | 0.0273 (7) | −0.0014 (6) | −0.0036 (6) | −0.0018 (5) |
N6 | 0.0343 (7) | 0.0250 (7) | 0.0264 (7) | 0.0006 (5) | 0.0011 (5) | 0.0003 (5) |
N7 | 0.0665 (12) | 0.0316 (8) | 0.0369 (9) | −0.0117 (8) | −0.0177 (8) | 0.0086 (7) |
C1 | 0.0389 (9) | 0.0310 (9) | 0.0332 (9) | −0.0026 (7) | 0.0030 (7) | −0.0004 (7) |
C2 | 0.0350 (9) | 0.0278 (8) | 0.0274 (8) | 0.0001 (6) | 0.0019 (6) | −0.0020 (6) |
C3 | 0.0382 (9) | 0.0286 (8) | 0.0292 (8) | 0.0018 (7) | −0.0014 (7) | −0.0029 (6) |
C4 | 0.0441 (10) | 0.0277 (8) | 0.0279 (8) | 0.0018 (7) | −0.0037 (7) | 0.0018 (6) |
C5 | 0.0335 (8) | 0.0232 (7) | 0.0264 (7) | 0.0026 (6) | 0.0040 (6) | −0.0013 (6) |
C6 | 0.0322 (8) | 0.0234 (7) | 0.0253 (7) | 0.0024 (6) | 0.0031 (6) | −0.0008 (6) |
C7 | 0.0295 (8) | 0.0277 (8) | 0.0252 (7) | 0.0032 (6) | 0.0029 (6) | −0.0008 (6) |
C8 | 0.0402 (9) | 0.0272 (8) | 0.0299 (8) | −0.0004 (7) | −0.0010 (7) | 0.0052 (6) |
C9 | 0.0374 (9) | 0.0300 (8) | 0.0349 (9) | −0.0041 (7) | −0.0011 (7) | −0.0002 (7) |
C10 | 0.0281 (8) | 0.0361 (9) | 0.0279 (8) | 0.0051 (7) | 0.0022 (6) | −0.0005 (7) |
C11 | 0.0398 (9) | 0.0312 (9) | 0.0314 (8) | 0.0042 (7) | −0.0016 (7) | 0.0068 (7) |
C12 | 0.0394 (9) | 0.0252 (8) | 0.0344 (9) | −0.0010 (7) | 0.0000 (7) | 0.0021 (6) |
C13 | 0.0350 (9) | 0.0426 (10) | 0.0323 (9) | 0.0037 (7) | 0.0002 (7) | −0.0005 (7) |
C14 | 0.0476 (11) | 0.0386 (10) | 0.0526 (12) | −0.0119 (9) | 0.0009 (9) | −0.0091 (8) |
O2S | 0.0839 (12) | 0.0294 (7) | 0.0764 (11) | 0.0002 (8) | 0.0186 (9) | 0.0034 (7) |
O1S—C1S | 1.390 (3) | N7—C4 | 1.321 (2) |
O1S—H1S | 0.83 | N7—H7A | 0.85 (2) |
C1S—H1S1 | 0.97 | N7—H7B | 0.89 (2) |
C1S—H1S2 | 0.97 | C1—C2 | 1.387 (2) |
C1S—H1S3 | 0.97 | C1—H1 | 0.94 |
C2S—O2S | 1.408 (3) | C2—C3 | 1.412 (2) |
C2S—H2S1 | 0.97 | C2—C5 | 1.419 (2) |
C2S—H2S2 | 0.97 | C6—C7 | 1.475 (2) |
C2S—H2S3 | 0.97 | C7—C12 | 1.388 (2) |
F1—C13 | 1.330 (2) | C7—C8 | 1.394 (2) |
F2—C13 | 1.338 (2) | C8—C9 | 1.383 (2) |
F3—C13 | 1.325 (2) | C8—H8 | 0.94 |
N1—C1 | 1.331 (2) | C9—C10 | 1.389 (2) |
N1—N2 | 1.366 (2) | C9—H9 | 0.94 |
N1—C14 | 1.456 (2) | C10—C11 | 1.382 (3) |
N2—C3 | 1.339 (2) | C10—C13 | 1.496 (2) |
N3—C4 | 1.310 (2) | C11—C12 | 1.386 (2) |
N3—C3 | 1.371 (2) | C11—H11 | 0.94 |
N4—N5 | 1.3698 (19) | C12—H12 | 0.94 |
N4—C5 | 1.370 (2) | C14—H14A | 0.97 |
N4—C4 | 1.396 (2) | C14—H14B | 0.97 |
N5—C6 | 1.324 (2) | C14—H14C | 0.97 |
N6—C5 | 1.319 (2) | O2S—H2S | 0.83 |
N6—C6 | 1.374 (2) | ||
C1S—O1S—H1S | 109.5 | N6—C5—N4 | 109.56 (14) |
O1S—C1S—H1S1 | 109.5 | N6—C5—C2 | 135.39 (15) |
O1S—C1S—H1S2 | 109.5 | N4—C5—C2 | 115.05 (14) |
H1S1—C1S—H1S2 | 109.5 | N5—C6—N6 | 115.41 (14) |
O1S—C1S—H1S3 | 109.5 | N5—C6—C7 | 122.01 (14) |
H1S1—C1S—H1S3 | 109.5 | N6—C6—C7 | 122.58 (14) |
H1S2—C1S—H1S3 | 109.5 | C12—C7—C8 | 119.65 (15) |
O2S—C2S—H2S1 | 109.5 | C12—C7—C6 | 120.21 (15) |
O2S—C2S—H2S2 | 109.5 | C8—C7—C6 | 120.14 (14) |
H2S1—C2S—H2S2 | 109.5 | C9—C8—C7 | 120.09 (15) |
O2S—C2S—H2S3 | 109.5 | C9—C8—H8 | 120.0 |
H2S1—C2S—H2S3 | 109.5 | C7—C8—H8 | 120.0 |
H2S2—C2S—H2S3 | 109.5 | C8—C9—C10 | 119.71 (16) |
C1—N1—N2 | 113.54 (14) | C8—C9—H9 | 120.1 |
C1—N1—C14 | 127.47 (16) | C10—C9—H9 | 120.1 |
N2—N1—C14 | 118.95 (15) | C11—C10—C9 | 120.58 (16) |
C3—N2—N1 | 103.90 (14) | C11—C10—C13 | 120.16 (16) |
C4—N3—C3 | 116.28 (14) | C9—C10—C13 | 119.11 (16) |
N5—N4—C5 | 110.01 (13) | C10—C11—C12 | 119.62 (15) |
N5—N4—C4 | 124.55 (14) | C10—C11—H11 | 120.2 |
C5—N4—C4 | 125.41 (14) | C12—C11—H11 | 120.2 |
C6—N5—N4 | 101.84 (13) | C11—C12—C7 | 120.34 (16) |
C5—N6—C6 | 103.18 (13) | C11—C12—H12 | 119.8 |
C4—N7—H7A | 123.1 (15) | C7—C12—H12 | 119.8 |
C4—N7—H7B | 117.2 (15) | F3—C13—F1 | 106.84 (16) |
H7A—N7—H7B | 119 (2) | F3—C13—F2 | 105.89 (16) |
N1—C1—C2 | 106.40 (15) | F1—C13—F2 | 105.45 (15) |
N1—C1—H1 | 126.8 | F3—C13—C10 | 113.04 (15) |
C2—C1—H1 | 126.8 | F1—C13—C10 | 113.31 (15) |
C1—C2—C3 | 104.97 (15) | F2—C13—C10 | 111.71 (14) |
C1—C2—C5 | 138.58 (16) | N1—C14—H14A | 109.5 |
C3—C2—C5 | 116.45 (15) | N1—C14—H14B | 109.5 |
N2—C3—N3 | 122.67 (15) | H14A—C14—H14B | 109.5 |
N2—C3—C2 | 111.18 (15) | N1—C14—H14C | 109.5 |
N3—C3—C2 | 126.15 (15) | H14A—C14—H14C | 109.5 |
N3—C4—N7 | 122.99 (16) | H14B—C14—H14C | 109.5 |
N3—C4—N4 | 120.64 (15) | C2S—O2S—H2S | 109.5 |
N7—C4—N4 | 116.37 (16) | ||
C1—N1—N2—C3 | 0.3 (2) | C1—C2—C5—N6 | 0.6 (4) |
C14—N1—N2—C3 | −177.53 (16) | C3—C2—C5—N6 | −178.44 (18) |
C5—N4—N5—C6 | −0.34 (17) | C1—C2—C5—N4 | −179.5 (2) |
C4—N4—N5—C6 | −178.42 (15) | C3—C2—C5—N4 | 1.4 (2) |
N2—N1—C1—C2 | −0.4 (2) | N4—N5—C6—N6 | 0.51 (18) |
C14—N1—C1—C2 | 177.22 (17) | N4—N5—C6—C7 | −179.41 (14) |
N1—C1—C2—C3 | 0.29 (19) | C5—N6—C6—N5 | −0.49 (19) |
N1—C1—C2—C5 | −178.9 (2) | C5—N6—C6—C7 | 179.44 (14) |
N1—N2—C3—N3 | 179.97 (16) | N5—C6—C7—C12 | −174.11 (16) |
N1—N2—C3—C2 | −0.1 (2) | N6—C6—C7—C12 | 6.0 (2) |
C4—N3—C3—N2 | −179.75 (17) | N5—C6—C7—C8 | 6.4 (2) |
C4—N3—C3—C2 | 0.3 (3) | N6—C6—C7—C8 | −173.47 (15) |
C1—C2—C3—N2 | −0.1 (2) | C12—C7—C8—C9 | −1.4 (3) |
C5—C2—C3—N2 | 179.25 (15) | C6—C7—C8—C9 | 178.09 (16) |
C1—C2—C3—N3 | 179.81 (17) | C7—C8—C9—C10 | 0.5 (3) |
C5—C2—C3—N3 | −0.8 (3) | C8—C9—C10—C11 | 0.8 (3) |
C3—N3—C4—N7 | 179.18 (18) | C8—C9—C10—C13 | −174.85 (16) |
C3—N3—C4—N4 | −0.5 (3) | C9—C10—C11—C12 | −1.2 (3) |
N5—N4—C4—N3 | 179.14 (16) | C13—C10—C11—C12 | 174.37 (16) |
C5—N4—C4—N3 | 1.3 (3) | C10—C11—C12—C7 | 0.4 (3) |
N5—N4—C4—N7 | −0.6 (3) | C8—C7—C12—C11 | 0.9 (3) |
C5—N4—C4—N7 | −178.36 (17) | C6—C7—C12—C11 | −178.53 (16) |
C6—N6—C5—N4 | 0.23 (17) | C11—C10—C13—F3 | 154.07 (17) |
C6—N6—C5—C2 | −179.89 (18) | C9—C10—C13—F3 | −30.3 (2) |
N5—N4—C5—N6 | 0.06 (19) | C11—C10—C13—F1 | 32.3 (2) |
C4—N4—C5—N6 | 178.13 (15) | C9—C10—C13—F1 | −152.04 (17) |
N5—N4—C5—C2 | −179.84 (14) | C11—C10—C13—F2 | −86.6 (2) |
C4—N4—C5—C2 | −1.8 (2) | C9—C10—C13—F2 | 89.0 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1S—H1S···N2i | 0.83 | 2.05 | 2.877 (2) | 175 |
O2S—H2S···N6 | 0.83 | 2.04 | 2.853 (2) | 165 |
N7—H7A···O1S | 0.85 (2) | 2.46 (2) | 3.050 (2) | 128 (2) |
N7—H7B···N3i | 0.89 (2) | 2.09 (3) | 2.979 (2) | 179 (2) |
Symmetry code: (i) −x, −y+1, −z. |
Experimental details
Crystal data | |
Chemical formula | C14H10F3N7·2CH4O |
Mr | 397.37 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 223 |
a, b, c (Å) | 4.6179 (3), 17.1149 (10), 22.7627 (13) |
β (°) | 94.323 (1) |
V (Å3) | 1793.93 (19) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.12 |
Crystal size (mm) | 0.58 × 0.32 × 0.12 |
Data collection | |
Diffractometer | Bruker SMART APEX CCD diffractometer |
Absorption correction | Multi-scan (SADABS; Sheldrick, 2001) |
Tmin, Tmax | 0.932, 0.985 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12385, 4076, 3538 |
Rint | 0.027 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.054, 0.145, 1.05 |
No. of reflections | 4076 |
No. of parameters | 266 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.35, −0.21 |
Computer programs: SMART (Bruker, 2001), SAINT (Bruker, 2001), SHELXS97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
O1S—H1S···N2i | 0.83 | 2.05 | 2.877 (2) | 175 |
O2S—H2S···N6 | 0.83 | 2.04 | 2.853 (2) | 165 |
N7—H7A···O1S | 0.85 (2) | 2.46 (2) | 3.050 (2) | 128 (2) |
N7—H7B···N3i | 0.89 (2) | 2.09 (3) | 2.979 (2) | 179 (2) |
Symmetry code: (i) −x, −y+1, −z. |
Acknowledgements
This work was supported by the National Medical Research Council, Singapore (grant No. NMRC/NIG/0020/2008).
References
Baraldi, P. G., Tabrizi, M. A., Romagnoli, R., El-Kashef, H., Preti, D., Bovero, A., Fruttarolo, F., Gordaliza, M. & Borea, P. A. (2006). Curr. Org. Chem. 10, 259–275. Web of Science CrossRef CAS Google Scholar
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573. CrossRef CAS Web of Science Google Scholar
Bruker (2001). SMART and SAINT. Bruker AXS GmbH, Karlsruhe, Germany. Google Scholar
Cacciari, B., Bolcato, C., Spalluto, G., Klotz, K.-N., Bacilieri, M., Deflorian, F. & Moro, S. (2007). Purinergic Signal. 3, 183–193. Web of Science CrossRef PubMed CAS Google Scholar
Cheong, S. L., Dolzhenko, A., Kachler, S., Paoletta, S., Federico, S., Cacciari, B., Dolzhenko, A., Klotz, K.-N., Moro, S., Spalluto, G. & Pastorin, G. (2010). J. Med. Chem. 53, 3361–3375. Web of Science CrossRef CAS PubMed Google Scholar
Dolzhenko, A. V., Pastorin, G., Dolzhenko, A. V. & Chui, W. K. (2009). Tetrahedron Lett. 50, 5617–5621. Web of Science CrossRef CAS Google Scholar
Ferretti, V., Pretto, L., Tabrizi, M. A. & Gilli, P. (2006). Acta Cryst. B62, 634–641. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Mezheritsky, V. V., Minkin, V. I., Minyaeva, L. G., Tyurin, R. G., Krasnikov, V. V., Vorobyev, E. V. & Starikova, Z. A. (2004). ARKIVOC, pp. 9–17. CrossRef Google Scholar
Sheldrick, G. M. (2001). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Tyurin, R. V., Vorob'ev, E. V., Minyaeva, L. G., Krasnikov, V. V. & Mezheritskii, V. V. (2005). Russ. J. Org. Chem. 41, 916–921. Web of Science CrossRef CAS Google Scholar
Xiao, L.-X. & Shi, D.-Q. (2007). Acta Cryst. E63, o3613. Web of Science CSD CrossRef IUCr Journals Google Scholar
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.
Pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine system has been recognized as an excellent template for the construction of new adenosine receptor antagonists (Baraldi et al., 2006; Cacciari et al., 2007). However, information on the structure of this heterocyclic system is limited (Ferretti et al., 2006; Mezheritsky et al., 2004; Tyurin et al., 2005; Xiao & Shi, 2007). In continuation of our works on the development of new pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine adenosine receptor antagonists (Dolzhenko et al., 2009; Cheong et al., 2010), we report here the molecular and crystal structure of 8-methyl-2-(4-trifluoromethylphenyl)-8H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine.
The compound crystallizes with two methanol solvent molecules. The heterocyclic ring system is essentially planar with an r.m.s. deviation of 0.009 Å. The phenyl ring makes a dihedral angle of 6.91 (8)° with the pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine core. The trifluoromethyl group C atom, C13, is located 0.130 (3) Å above the C7—C12 mean plane.
In the crystal, molecules of 8-methyl-2-(4-trifluoromethylphenyl)-8H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidin-5-amine form centrosymmetric inversion dimers (Fig. 2). The pyrimidine N3 atom is connected with amino group N7—H7B of the pair molecule by intermolecular N···H—N hydrogen bond making R22(8) graph-set motif (Bernstein et al.,1995). Methanol hydroxy group O1S—H1S also links the heterocyclic molecules in the dimer by the N—H···O—H···N hydrogen bond array with amino group N7—H7A and N2 of the pyrazole ring making R44(16) graph-set motif. Another methanol molecule forms the O—H···N hydrogen bond with N6 of the triazole ring. The dimers are stacked along the a axis, with π–π interactions between pyrazole and triazole rings [centroid-to-centroid distance = 3.4953 (10) Å] (Fig. 2).