organic compounds
7-[4-(4-Fluorophenyl)-2-methylsulfanyl-1H-imidazol-5-yl]tetrazolo[1,5-a]pyridine
aEberhard-Karls-University Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany, bUniversity Mainz, Duesbergweg 10-14, 55099 Mainz, Germany, and cc-a-i-r biosciences GmbH, Paul-Ehrlich-Strasse 15, 72076 Tübingen, Germany
*Correspondence e-mail: stefan.laufer@uni-tuebingen.de
The 15H11FN6S, forms a three-dimensional network stabilized by π–π interactions between the imidazole core and the tetrazole ring of the tetrazolopyridineunit; the centroid–centroid distance is 3.627 (1) Å. The also displays bifurcated N—H⋯(N,N) hydrogen bonding and C—H⋯F interactions. The former involve the NH H atom of the imidazole core and the tetrazolopyridine N atoms, while the latter involve a methyl H atom, of the methylsulfanyl group, and the 4-fluorophenyl F atom. In the molecule, the imidazole ring makes dihedral angles of 40.45 (9) and 17.09 (8)°, respectively, with the 4-fluorophenyl ring and the tetrazolopyridine ring mean plane.
of the title compound, CRelated literature
For the biological relevance and the development of p38 MAP kinase inhibitors, see: see: Peifer et al. (2006). For the preparation of 2-fluoro-4-[4-(4-fluorophenyl)-2-(methylthio)-1H-imidazol-5-yl]pyridine, see: Laufer & Liedtke (2006). For the preparation of tetrazolopyridines, see: Capelli et al. (2008).
Experimental
Crystal data
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Refinement
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Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell CAD-4 Software; data reduction: CORINC (Dräger & Gattow, 1971); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON.
Supporting information
https://doi.org/10.1107/S1600536810002680/su2158sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810002680/su2158Isup2.hkl
A mixture of 300 mg 2-fluoro-4-[4-(4-fluorophenyl)-2-(methylthio)-1H-imidazol-5- yl]pyridine (Laufer & Liedtke, 2006) in anhydrous DMF with 100 mg sodium azide was heated at 353 K for 12 h. The solvent was then removed under reduced pressure and the residue was diluted with ethylacetate. The organic phase was washed with water and concentrated under reduced pressure. The residue was purified by flash
with ethyl acetate/hexane (1/1) to yield 153 mg (47%) of the title compound. Crystals suitable for X-ray analysis were obtained by crystallization from methanol.The H atom attached to N10 was located in a difference Fourier map and refined with a distance restraint of 0.92 (2) Å and Uiso(H) = 1.2Ueq(N). The C-bound H-atoms were placed in calculated positions and refined in the riding-model approximation: C-H = 0.95 - 0.98 Å with Uiso(H) = k × Ueq(C), where k = 1.2 for H-aromatic and 1.5 for H-methyl.
Pyridylimidazoles like SB203580 are well known p38 MAP kinase inhibitors (Peifer et al., 2006). The function of the pyridine moiety is to accept a hydrogen bond from the backbone of Met109 in the Hinge region. In the course of our studies we have tried to modify this acceptor system by using the title tetrazolopyridine (Capelli et al., 2008).
The molecular structure of the title compound is given in Fig. 1, and the geometrical parameters are available in the Supplementary information and the archived
The imidazole ring mean plane makes dihedral angles of 40.45 (9)° and 17.09 (8)° with the 4-fluorophenyl ring and the tetrazolopyridine ring mean plane, respectively.The π-π interactions between the imidazole core and the tetrazole moiety of the tetrazolopyridine group; the centroid···centroid distance is 3.627 (1) Å (Table 1).
displays asymmetric bifurcated N—H···N hydrogen bonds involving the tetrazolopyridine N-atoms and the NH H-atom of the the imidazole core (Table 1). There is also a C-H···F interaction involving the methylsulfanyl group and the 4-fluorophenyl F-atom (Table 1). The of the title compound forms a three dimensional network stabilized byFor the biological relevance and the development of p38 MAP kinase inhibitors, see: see: Peifer et al. (2006). For the preparation of 2-fluoro-4-[4-(4-fluorophenyl)-2-(methylthio)-1H-imidazol-5-yl]pyridine, see: Laufer & Liedtke (2006). For the preparation of tetrazolopyridines, see: Capelli et al. (2008).
Data collection: CAD-4 Software (Enraf–Nonius, 1989); cell
CAD-4 Software (Enraf–Nonius, 1989); data reduction: CORINC (Dräger & Gattow, 1971); program(s) used to solve structure: SIR97 (Altomare et al., 1999); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009); software used to prepare material for publication: PLATON (Spek, 2009).Fig. 1. A view of the molecular structure of the title compound. the displacement ellipsoids are drawn at the 50% probability level. |
C15H11FN6S | F(000) = 672 |
Mr = 326.36 | Dx = 1.495 Mg m−3 |
Monoclinic, P21/c | Cu Kα radiation, λ = 1.54178 Å |
Hall symbol: -P 2ybc | Cell parameters from 25 reflections |
a = 9.8342 (7) Å | θ = 65–70° |
b = 18.1908 (6) Å | µ = 2.17 mm−1 |
c = 8.2374 (7) Å | T = 193 K |
β = 100.292 (3)° | Plate, colourless |
V = 1449.89 (17) Å3 | 0.30 × 0.20 × 0.10 mm |
Z = 4 |
Enraf–Nonius CAD-4 diffractometer | 2403 reflections with I > 2σ(I) |
Radiation source: rotating anode | Rint = 0.056 |
Graphite monochromator | θmax = 69.9°, θmin = 4.6° |
ω/2θ scans | h = −11→11 |
Absorption correction: ψ scan (CORINC; Dräger & Gattow, 1971) | k = −22→22 |
Tmin = 0.866, Tmax = 0.999 | l = −10→0 |
5760 measured reflections | 3 standard reflections every 60 min |
2733 independent reflections | intensity decay: 3% |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.038 | H-atom parameters constrained |
wR(F2) = 0.107 | w = 1/[σ2(Fo2) + (0.051P)2 + 0.5315P] where P = (Fo2 + 2Fc2)/3 |
S = 1.06 | (Δ/σ)max = 0.001 |
2733 reflections | Δρmax = 0.37 e Å−3 |
210 parameters | Δρmin = −0.30 e Å−3 |
0 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0014 (2) |
C15H11FN6S | V = 1449.89 (17) Å3 |
Mr = 326.36 | Z = 4 |
Monoclinic, P21/c | Cu Kα radiation |
a = 9.8342 (7) Å | µ = 2.17 mm−1 |
b = 18.1908 (6) Å | T = 193 K |
c = 8.2374 (7) Å | 0.30 × 0.20 × 0.10 mm |
β = 100.292 (3)° |
Enraf–Nonius CAD-4 diffractometer | 2403 reflections with I > 2σ(I) |
Absorption correction: ψ scan (CORINC; Dräger & Gattow, 1971) | Rint = 0.056 |
Tmin = 0.866, Tmax = 0.999 | 3 standard reflections every 60 min |
5760 measured reflections | intensity decay: 3% |
2733 independent reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.107 | H-atom parameters constrained |
S = 1.06 | Δρmax = 0.37 e Å−3 |
2733 reflections | Δρmin = −0.30 e Å−3 |
210 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell esds are taken into account in the estimation of distances, angles and torsion angles |
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 | ||
S20 | 0.84423 (5) | 0.32567 (2) | 0.15709 (8) | 0.0423 (2) | |
F19 | 0.09192 (12) | 0.08344 (6) | 0.37488 (16) | 0.0442 (4) | |
N1 | 0.29691 (15) | 0.61704 (7) | 0.31439 (19) | 0.0284 (4) | |
N2 | 0.18289 (15) | 0.63452 (8) | 0.3762 (2) | 0.0315 (4) | |
N3 | 0.12953 (15) | 0.57831 (8) | 0.4381 (2) | 0.0304 (4) | |
N3A | 0.21213 (13) | 0.52053 (7) | 0.41594 (17) | 0.0232 (4) | |
N8 | 0.62050 (14) | 0.39105 (8) | 0.25381 (18) | 0.0265 (4) | |
N10 | 0.61319 (14) | 0.26910 (7) | 0.24463 (18) | 0.0271 (4) | |
C4 | 0.20076 (17) | 0.44913 (9) | 0.4666 (2) | 0.0267 (5) | |
C5 | 0.29443 (17) | 0.40040 (9) | 0.4318 (2) | 0.0264 (5) | |
C6 | 0.40054 (16) | 0.42075 (8) | 0.3415 (2) | 0.0221 (4) | |
C7 | 0.41195 (16) | 0.49369 (9) | 0.2991 (2) | 0.0231 (4) | |
C7A | 0.31553 (16) | 0.54434 (9) | 0.3388 (2) | 0.0230 (4) | |
C9 | 0.68541 (17) | 0.33087 (9) | 0.2239 (2) | 0.0275 (5) | |
C11 | 0.49088 (16) | 0.29071 (9) | 0.2895 (2) | 0.0239 (5) | |
C12 | 0.49810 (16) | 0.36671 (9) | 0.2974 (2) | 0.0233 (5) | |
C13 | 0.38534 (16) | 0.23580 (9) | 0.3073 (2) | 0.0241 (5) | |
C14 | 0.24524 (17) | 0.24835 (9) | 0.2461 (2) | 0.0286 (5) | |
C15 | 0.14573 (18) | 0.19732 (10) | 0.2673 (2) | 0.0313 (5) | |
C16 | 0.18916 (19) | 0.13307 (9) | 0.3491 (2) | 0.0301 (5) | |
C17 | 0.32598 (19) | 0.11634 (9) | 0.4043 (2) | 0.0297 (5) | |
C18 | 0.42396 (18) | 0.16837 (9) | 0.3835 (2) | 0.0266 (5) | |
C21 | 0.8749 (2) | 0.42202 (11) | 0.1351 (3) | 0.0420 (7) | |
H4 | 0.12940 | 0.43470 | 0.52390 | 0.0320* | |
H5 | 0.29010 | 0.35100 | 0.46820 | 0.0320* | |
H7 | 0.48390 | 0.50930 | 0.24390 | 0.0280* | |
H10 | 0.64590 | 0.22270 | 0.23220 | 0.0320* | |
H14 | 0.21790 | 0.29280 | 0.18890 | 0.0340* | |
H15 | 0.05050 | 0.20630 | 0.22690 | 0.0380* | |
H17 | 0.35240 | 0.07040 | 0.45520 | 0.0360* | |
H18 | 0.51900 | 0.15820 | 0.42160 | 0.0320* | |
H21A | 0.80250 | 0.44270 | 0.05010 | 0.0630* | |
H21B | 0.96520 | 0.42910 | 0.10280 | 0.0630* | |
H21C | 0.87380 | 0.44690 | 0.24030 | 0.0630* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S20 | 0.0311 (3) | 0.0261 (3) | 0.0757 (4) | 0.0036 (2) | 0.0258 (2) | −0.0011 (2) |
F19 | 0.0400 (6) | 0.0307 (6) | 0.0661 (8) | −0.0095 (5) | 0.0210 (6) | 0.0042 (5) |
N1 | 0.0261 (7) | 0.0188 (7) | 0.0413 (8) | 0.0027 (5) | 0.0087 (6) | 0.0029 (6) |
N2 | 0.0264 (7) | 0.0217 (7) | 0.0478 (9) | 0.0046 (6) | 0.0104 (6) | 0.0033 (6) |
N3 | 0.0264 (7) | 0.0230 (7) | 0.0436 (9) | 0.0066 (6) | 0.0112 (6) | 0.0017 (6) |
N3A | 0.0207 (6) | 0.0193 (6) | 0.0304 (7) | 0.0018 (5) | 0.0066 (5) | 0.0006 (5) |
N8 | 0.0218 (7) | 0.0208 (7) | 0.0377 (8) | 0.0005 (5) | 0.0073 (6) | −0.0022 (6) |
N10 | 0.0239 (7) | 0.0182 (6) | 0.0395 (8) | 0.0026 (5) | 0.0067 (6) | −0.0020 (6) |
C4 | 0.0273 (8) | 0.0208 (8) | 0.0342 (9) | −0.0014 (6) | 0.0113 (7) | 0.0034 (7) |
C5 | 0.0304 (8) | 0.0185 (8) | 0.0311 (9) | −0.0003 (6) | 0.0076 (7) | 0.0027 (7) |
C6 | 0.0209 (7) | 0.0192 (7) | 0.0255 (8) | 0.0000 (6) | 0.0019 (6) | −0.0016 (6) |
C7 | 0.0202 (7) | 0.0204 (7) | 0.0293 (8) | −0.0014 (6) | 0.0059 (6) | −0.0012 (6) |
C7A | 0.0211 (7) | 0.0191 (7) | 0.0286 (8) | −0.0018 (6) | 0.0037 (6) | 0.0000 (6) |
C9 | 0.0219 (8) | 0.0219 (8) | 0.0390 (9) | 0.0005 (6) | 0.0062 (7) | −0.0014 (7) |
C11 | 0.0228 (8) | 0.0194 (8) | 0.0287 (8) | 0.0020 (6) | 0.0027 (6) | −0.0015 (6) |
C12 | 0.0221 (8) | 0.0198 (8) | 0.0275 (8) | 0.0007 (6) | 0.0031 (6) | −0.0004 (6) |
C13 | 0.0265 (8) | 0.0193 (8) | 0.0262 (8) | 0.0003 (6) | 0.0043 (6) | −0.0028 (6) |
C14 | 0.0283 (9) | 0.0198 (8) | 0.0364 (10) | 0.0018 (7) | 0.0022 (7) | 0.0005 (7) |
C15 | 0.0246 (8) | 0.0256 (8) | 0.0432 (10) | 0.0009 (7) | 0.0044 (7) | −0.0034 (8) |
C16 | 0.0320 (9) | 0.0227 (8) | 0.0382 (9) | −0.0057 (7) | 0.0133 (7) | −0.0041 (7) |
C17 | 0.0389 (10) | 0.0212 (8) | 0.0299 (9) | 0.0016 (7) | 0.0088 (7) | 0.0025 (7) |
C18 | 0.0280 (8) | 0.0222 (8) | 0.0288 (8) | 0.0027 (6) | 0.0026 (7) | −0.0005 (6) |
C21 | 0.0417 (11) | 0.0295 (10) | 0.0608 (13) | −0.0047 (8) | 0.0255 (10) | −0.0009 (9) |
S20—C9 | 1.7488 (18) | C11—C12 | 1.385 (2) |
S20—C21 | 1.793 (2) | C11—C13 | 1.467 (2) |
F19—C16 | 1.359 (2) | C13—C18 | 1.399 (2) |
N1—N2 | 1.350 (2) | C13—C14 | 1.399 (2) |
N1—C7A | 1.345 (2) | C14—C15 | 1.382 (2) |
N2—N3 | 1.295 (2) | C15—C16 | 1.378 (2) |
N3—N3A | 1.361 (2) | C16—C17 | 1.375 (3) |
N3A—C4 | 1.375 (2) | C17—C18 | 1.383 (2) |
N3A—C7A | 1.362 (2) | C4—H4 | 0.9500 |
N8—C9 | 1.313 (2) | C5—H5 | 0.9500 |
N8—C12 | 1.389 (2) | C7—H7 | 0.9500 |
N10—C9 | 1.356 (2) | C14—H14 | 0.9500 |
N10—C11 | 1.377 (2) | C15—H15 | 0.9500 |
N10—H10 | 0.9200 | C17—H17 | 0.9500 |
C4—C5 | 1.346 (2) | C18—H18 | 0.9500 |
C5—C6 | 1.434 (2) | C21—H21A | 0.9800 |
C6—C7 | 1.382 (2) | C21—H21B | 0.9800 |
C6—C12 | 1.464 (2) | C21—H21C | 0.9800 |
C7—C7A | 1.402 (2) | ||
C9—S20—C21 | 98.90 (9) | C11—C13—C14 | 121.46 (15) |
N2—N1—C7A | 105.98 (13) | C11—C13—C18 | 120.11 (15) |
N1—N2—N3 | 112.64 (14) | C13—C14—C15 | 121.26 (15) |
N2—N3—N3A | 105.28 (14) | C14—C15—C16 | 117.82 (16) |
N3—N3A—C4 | 127.32 (14) | F19—C16—C17 | 118.39 (15) |
N3—N3A—C7A | 109.28 (13) | F19—C16—C15 | 118.32 (16) |
C4—N3A—C7A | 123.36 (14) | C15—C16—C17 | 123.28 (17) |
C9—N8—C12 | 104.82 (14) | C16—C17—C18 | 118.02 (15) |
C9—N10—C11 | 107.42 (13) | C13—C18—C17 | 121.08 (16) |
C11—N10—H10 | 129.00 | N3A—C4—H4 | 121.00 |
C9—N10—H10 | 123.00 | C5—C4—H4 | 121.00 |
N3A—C4—C5 | 117.50 (15) | C4—C5—H5 | 119.00 |
C4—C5—C6 | 121.98 (15) | C6—C5—H5 | 119.00 |
C5—C6—C7 | 118.59 (14) | C6—C7—H7 | 121.00 |
C5—C6—C12 | 121.68 (14) | C7A—C7—H7 | 121.00 |
C7—C6—C12 | 119.71 (14) | C13—C14—H14 | 119.00 |
C6—C7—C7A | 118.90 (15) | C15—C14—H14 | 119.00 |
N3A—C7A—C7 | 119.48 (14) | C14—C15—H15 | 121.00 |
N1—C7A—N3A | 106.81 (14) | C16—C15—H15 | 121.00 |
N1—C7A—C7 | 133.70 (15) | C16—C17—H17 | 121.00 |
S20—C9—N8 | 126.57 (13) | C18—C17—H17 | 121.00 |
S20—C9—N10 | 120.80 (12) | C13—C18—H18 | 119.00 |
N8—C9—N10 | 112.59 (15) | C17—C18—H18 | 119.00 |
N10—C11—C12 | 104.93 (14) | S20—C21—H21A | 109.00 |
C12—C11—C13 | 134.93 (15) | S20—C21—H21B | 109.00 |
N10—C11—C13 | 120.00 (14) | S20—C21—H21C | 109.00 |
N8—C12—C11 | 110.22 (14) | H21A—C21—H21B | 109.00 |
C6—C12—C11 | 130.65 (15) | H21A—C21—H21C | 109.00 |
N8—C12—C6 | 119.13 (14) | H21B—C21—H21C | 109.00 |
C14—C13—C18 | 118.41 (15) | ||
C21—S20—C9—N8 | −3.16 (18) | C5—C6—C12—C11 | 18.8 (3) |
C21—S20—C9—N10 | 174.43 (15) | C7—C6—C12—N8 | 16.8 (2) |
N2—N1—C7A—C7 | 178.07 (18) | C7—C6—C12—C11 | −162.78 (17) |
N2—N1—C7A—N3A | −0.43 (18) | C5—C6—C12—N8 | −161.63 (15) |
C7A—N1—N2—N3 | 0.4 (2) | C12—C6—C7—C7A | 178.46 (15) |
N1—N2—N3—N3A | −0.1 (2) | C6—C7—C7A—N3A | −0.9 (2) |
N2—N3—N3A—C7A | −0.15 (18) | C6—C7—C7A—N1 | −179.22 (18) |
N2—N3—N3A—C4 | 177.50 (16) | N10—C11—C12—N8 | 1.62 (18) |
N3—N3A—C7A—N1 | 0.37 (18) | N10—C11—C12—C6 | −178.74 (16) |
N3—N3A—C4—C5 | −179.88 (15) | C13—C11—C12—N8 | −173.91 (17) |
C7A—N3A—C4—C5 | −2.5 (2) | C13—C11—C12—C6 | 5.7 (3) |
C4—N3A—C7A—C7 | 3.9 (2) | N10—C11—C13—C14 | −136.99 (17) |
N3—N3A—C7A—C7 | −178.39 (15) | N10—C11—C13—C18 | 41.5 (2) |
C4—N3A—C7A—N1 | −177.39 (15) | C12—C11—C13—C14 | 38.0 (3) |
C12—N8—C9—S20 | 177.95 (13) | C12—C11—C13—C18 | −143.46 (19) |
C9—N8—C12—C11 | −1.15 (18) | C11—C13—C14—C15 | −178.13 (15) |
C12—N8—C9—N10 | 0.20 (19) | C18—C13—C14—C15 | 3.3 (2) |
C9—N8—C12—C6 | 179.17 (15) | C11—C13—C18—C17 | 178.80 (15) |
C9—N10—C11—C12 | −1.45 (18) | C14—C13—C18—C17 | −2.6 (2) |
C9—N10—C11—C13 | 174.90 (15) | C13—C14—C15—C16 | −0.8 (2) |
C11—N10—C9—S20 | −177.08 (12) | C14—C15—C16—F19 | 178.12 (15) |
C11—N10—C9—N8 | 0.82 (19) | C14—C15—C16—C17 | −2.6 (3) |
N3A—C4—C5—C6 | −1.7 (2) | F19—C16—C17—C18 | −177.45 (15) |
C4—C5—C6—C7 | 4.4 (2) | C15—C16—C17—C18 | 3.3 (3) |
C4—C5—C6—C12 | −177.10 (16) | C16—C17—C18—C13 | −0.6 (2) |
C5—C6—C7—C7A | −3.0 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N10—H10···N1i | 0.92 | 2.06 | 2.9703 (19) | 174 |
N10—H10···N2i | 0.92 | 2.60 | 3.423 (2) | 151 |
C7—H7···N8 | 0.95 | 2.53 | 2.847 (2) | 100 |
C21—H21B···F19ii | 0.98 | 2.44 | 3.286 (3) | 144 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1, −y+1/2, z−1/2. |
Experimental details
Crystal data | |
Chemical formula | C15H11FN6S |
Mr | 326.36 |
Crystal system, space group | Monoclinic, P21/c |
Temperature (K) | 193 |
a, b, c (Å) | 9.8342 (7), 18.1908 (6), 8.2374 (7) |
β (°) | 100.292 (3) |
V (Å3) | 1449.89 (17) |
Z | 4 |
Radiation type | Cu Kα |
µ (mm−1) | 2.17 |
Crystal size (mm) | 0.30 × 0.20 × 0.10 |
Data collection | |
Diffractometer | Enraf–Nonius CAD-4 |
Absorption correction | ψ scan (CORINC; Dräger & Gattow, 1971) |
Tmin, Tmax | 0.866, 0.999 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 5760, 2733, 2403 |
Rint | 0.056 |
(sin θ/λ)max (Å−1) | 0.609 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.107, 1.06 |
No. of reflections | 2733 |
No. of parameters | 210 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.37, −0.30 |
Computer programs: CAD-4 Software (Enraf–Nonius, 1989), CORINC (Dräger & Gattow, 1971), SIR97 (Altomare et al., 1999), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009).
D—H···A | D—H | H···A | D···A | D—H···A |
N10—H10···N1i | 0.92 | 2.06 | 2.9703 (19) | 174 |
N10—H10···N2i | 0.92 | 2.60 | 3.423 (2) | 151 |
C21—H21B···F19ii | 0.98 | 2.44 | 3.286 (3) | 144 |
Symmetry codes: (i) −x+1, y−1/2, −z+1/2; (ii) x+1, −y+1/2, z−1/2. |
Acknowledgements
The authors would like to thank the Federal Ministry of Education and Research, Germany, Merckle GmbH, Ulm, Germany, and the Fonds der Chemischen Industrie, Germany, for their generous support of this work.
References
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Pyridylimidazoles like SB203580 are well known p38 MAP kinase inhibitors (Peifer et al., 2006). The function of the pyridine moiety is to accept a hydrogen bond from the backbone of Met109 in the Hinge region. In the course of our studies we have tried to modify this acceptor system by using the title tetrazolopyridine (Capelli et al., 2008).
The molecular structure of the title compound is given in Fig. 1, and the geometrical parameters are available in the Supplementary information and the archived CIF. The imidazole ring mean plane makes dihedral angles of 40.45 (9)° and 17.09 (8)° with the 4-fluorophenyl ring and the tetrazolopyridine ring mean plane, respectively.
The crystal structure displays asymmetric bifurcated N—H···N hydrogen bonds involving the tetrazolopyridine N-atoms and the NH H-atom of the the imidazole core (Table 1). There is also a C-H···F interaction involving the methylsulfanyl group and the 4-fluorophenyl F-atom (Table 1). The crystal structure of the title compound forms a three dimensional network stabilized by π-π interactions between the imidazole core and the tetrazole moiety of the tetrazolopyridine group; the centroid···centroid distance is 3.627 (1) Å (Table 1).