organic compounds
N-(4-Bromophenyl)-2-[(1-cyclohexylmethyl-1H-1,2,4-triazol-3-yl)sulfanyl]acetamide
aDepartment of Applied Chemistry, Faculty of Science, Kunming University of Science and Technology, Kunming, 650050, People's Republic of China, and bKey Laboratory of Medicinal Chemistry for Natural Resource, (Ministry of Education), School of Chemical Science and Technology, Yunnan University, Kunming 650091, People's Republic of China
*Correspondence e-mail: yphe@ynu.edu.cn
The title compound, C17H21BrN4OS, was synthesized as a potential reverse transcriptase (RT) inhibitor of the human immunodeficiency virus type 1 (HIV-1). In the molecule, there is an N—H⋯S hydrogen bond making a five-membered ring. In the crystal, molecules are connected into centrosymmetric dimers via pairs of N—H⋯N and weak C—H⋯N hydrogen bonds. The also features C—H⋯O interactions.
Related literature
The 1,2,4-triazole scaffold and its analogues are important pharmacophores that can be found in biologically active compounds across a number of different therapeutic areas, see: Lin et al. (2005); Naito et al. (1996); Sui et al. (1998); Tafi et al. (2002).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1998); cell SAINT (Bruker, 1998); 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/S1600536812015991/bq2348sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812015991/bq2348Isup2.hkl
To a stirred solution of 2-((1H-1,2,4-triazol-3-yl)thio)-N-(4-bromophenyl)acetamide (3.12 g, 10 mmol) in anhydrous EtOH (75 ml) was added K2CO3 (1.38 g, 0.01 mol) under a nitrogen atmosphere. The mixture was stirred at 298 K for 15 min, then (bromomethyl)cyclohexane (0.53 g, 0.03 mol) was added, and the reaction mixture was refluxed for 8 h under a nitrogen atmosphere. The reaction mixture was poured into cold H2O (80 ml), then the aqueous phase was extracted with EtOAc (3×50 ml). The combined organic layer was washed with H2O (3×50 ml), dried (Mg2SO4), filtered and concentrated in vacuo to give the crude product, which was purified by
(eluent EtOAc/PE 100:25) to afford the title compound (yield: 23%; m.p. 398.7–398.9 K). Single crystals of (I) suitable for X-ray diffraction were grown from a solution in EtOAc by slow evaporation. The product was characterized by IR, MS, 1H NMR and 13C NMR.All H atoms were placed in calculated positions with N—H = 0.86 Å and C—H = 0.93–0.98 Å, and with Uiso(H) = 1.2Ueq(C, N).
Data collection: SMART (Bruker, 1998); cell
SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); 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 (Sheldrick, 2008).C17H21BrN4OS | Z = 2 |
Mr = 409.35 | F(000) = 420 |
Triclinic, P1 | Dx = 1.439 Mg m−3 |
Hall symbol: -P 1 | Melting point: 398.8(1) K |
a = 7.2061 (8) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 9.521 (1) Å | Cell parameters from 2212 reflections |
c = 14.2862 (16) Å | θ = 2.3–24.5° |
α = 104.132 (1)° | µ = 2.30 mm−1 |
β = 90.804 (1)° | T = 298 K |
γ = 95.820 (1)° | Block, colourless |
V = 944.84 (18) Å3 | 0.25 × 0.16 × 0.12 mm |
Bruker SMART CCD area-detector diffractometer | 4076 independent reflections |
Radiation source: fine-focus sealed tube | 2644 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.025 |
phi and ω scans | θmax = 27.0°, θmin = 1.5° |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | h = −9→8 |
Tmin = 0.597, Tmax = 0.770 | k = −12→12 |
8793 measured reflections | l = −18→18 |
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)] = 0.038 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0382P)2 + 0.1448P] where P = (Fo2 + 2Fc2)/3 |
4076 reflections | (Δ/σ)max = 0.001 |
217 parameters | Δρmax = 0.34 e Å−3 |
0 restraints | Δρmin = −0.42 e Å−3 |
C17H21BrN4OS | γ = 95.820 (1)° |
Mr = 409.35 | V = 944.84 (18) Å3 |
Triclinic, P1 | Z = 2 |
a = 7.2061 (8) Å | Mo Kα radiation |
b = 9.521 (1) Å | µ = 2.30 mm−1 |
c = 14.2862 (16) Å | T = 298 K |
α = 104.132 (1)° | 0.25 × 0.16 × 0.12 mm |
β = 90.804 (1)° |
Bruker SMART CCD area-detector diffractometer | 4076 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 1998) | 2644 reflections with I > 2σ(I) |
Tmin = 0.597, Tmax = 0.770 | Rint = 0.025 |
8793 measured reflections |
R[F2 > 2σ(F2)] = 0.038 | 0 restraints |
wR(F2) = 0.092 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.34 e Å−3 |
4076 reflections | Δρmin = −0.42 e Å−3 |
217 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 > 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 | ||
Br1 | 1.07267 (5) | 0.57798 (4) | 0.86425 (2) | 0.07787 (16) | |
N1 | 0.2679 (3) | 1.0737 (2) | 0.49703 (17) | 0.0506 (6) | |
N2 | 0.1739 (3) | 0.9382 (2) | 0.60131 (15) | 0.0444 (5) | |
N3 | 0.1580 (3) | 1.0832 (2) | 0.64012 (16) | 0.0461 (5) | |
N4 | 0.4730 (3) | 0.6839 (2) | 0.59376 (15) | 0.0434 (5) | |
H4 | 0.5020 | 0.7572 | 0.5696 | 0.052* | |
O1 | 0.2434 (3) | 0.5032 (2) | 0.59473 (15) | 0.0683 (6) | |
S1 | 0.28308 (9) | 0.78377 (7) | 0.42896 (5) | 0.04868 (18) | |
C1 | 0.2140 (4) | 1.1586 (3) | 0.5772 (2) | 0.0532 (7) | |
H1 | 0.2151 | 1.2590 | 0.5881 | 0.064* | |
C2 | 0.0908 (4) | 1.1312 (3) | 0.7364 (2) | 0.0557 (7) | |
H2A | −0.0288 | 1.0766 | 0.7404 | 0.067* | |
H2B | 0.0714 | 1.2333 | 0.7483 | 0.067* | |
C3 | 0.2247 (4) | 1.1117 (3) | 0.81422 (19) | 0.0537 (7) | |
H3 | 0.2486 | 1.0092 | 0.7988 | 0.064* | |
C4 | 0.4098 (4) | 1.2034 (4) | 0.8179 (2) | 0.0726 (9) | |
H4A | 0.3883 | 1.3049 | 0.8277 | 0.087* | |
H4B | 0.4685 | 1.1743 | 0.7565 | 0.087* | |
C5 | 0.5408 (5) | 1.1879 (5) | 0.8986 (3) | 0.0958 (12) | |
H5A | 0.5750 | 1.0892 | 0.8847 | 0.115* | |
H5B | 0.6540 | 1.2537 | 0.9016 | 0.115* | |
C6 | 0.4501 (7) | 1.2220 (5) | 0.9949 (3) | 0.1066 (14) | |
H6A | 0.5329 | 1.2047 | 1.0440 | 0.128* | |
H6B | 0.4294 | 1.3241 | 1.0124 | 0.128* | |
C7 | 0.2675 (6) | 1.1298 (5) | 0.9914 (2) | 0.0935 (12) | |
H7A | 0.2096 | 1.1578 | 1.0531 | 0.112* | |
H7B | 0.2901 | 1.0285 | 0.9808 | 0.112* | |
C8 | 0.1356 (5) | 1.1455 (4) | 0.9123 (2) | 0.0755 (9) | |
H8A | 0.1012 | 1.2442 | 0.9268 | 0.091* | |
H8B | 0.0227 | 1.0797 | 0.9098 | 0.091* | |
C9 | 0.2392 (3) | 0.9403 (3) | 0.51580 (18) | 0.0405 (6) | |
C10 | 0.1917 (4) | 0.6457 (3) | 0.48677 (19) | 0.0465 (6) | |
H10A | 0.0761 | 0.6752 | 0.5154 | 0.056* | |
H10B | 0.1590 | 0.5573 | 0.4363 | 0.056* | |
C11 | 0.3064 (4) | 0.6054 (3) | 0.56361 (19) | 0.0435 (6) | |
C12 | 0.6046 (3) | 0.6588 (2) | 0.66041 (17) | 0.0397 (6) | |
C13 | 0.7805 (3) | 0.7356 (3) | 0.66796 (18) | 0.0449 (6) | |
H13 | 0.8052 | 0.8042 | 0.6320 | 0.054* | |
C14 | 0.9196 (4) | 0.7118 (3) | 0.72794 (19) | 0.0494 (6) | |
H14 | 1.0376 | 0.7631 | 0.7319 | 0.059* | |
C15 | 0.8817 (4) | 0.6118 (3) | 0.78159 (18) | 0.0487 (6) | |
C16 | 0.7086 (4) | 0.5367 (3) | 0.7767 (2) | 0.0575 (7) | |
H16 | 0.6845 | 0.4700 | 0.8141 | 0.069* | |
C17 | 0.5691 (4) | 0.5594 (3) | 0.71644 (19) | 0.0548 (7) | |
H17 | 0.4513 | 0.5082 | 0.7134 | 0.066* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Br1 | 0.0771 (3) | 0.0900 (3) | 0.0738 (2) | 0.01971 (19) | −0.02021 (18) | 0.03131 (19) |
N1 | 0.0502 (13) | 0.0471 (13) | 0.0616 (15) | −0.0016 (11) | −0.0049 (11) | 0.0299 (12) |
N2 | 0.0453 (12) | 0.0378 (12) | 0.0519 (13) | 0.0023 (10) | −0.0001 (10) | 0.0156 (10) |
N3 | 0.0460 (13) | 0.0382 (12) | 0.0539 (14) | 0.0033 (10) | −0.0043 (10) | 0.0119 (10) |
N4 | 0.0402 (12) | 0.0394 (11) | 0.0550 (13) | 0.0011 (10) | −0.0018 (10) | 0.0217 (10) |
O1 | 0.0601 (13) | 0.0535 (12) | 0.0978 (16) | −0.0140 (10) | −0.0139 (11) | 0.0406 (12) |
S1 | 0.0452 (4) | 0.0554 (4) | 0.0474 (4) | 0.0041 (3) | 0.0001 (3) | 0.0172 (3) |
C1 | 0.0509 (16) | 0.0387 (15) | 0.074 (2) | 0.0001 (13) | −0.0130 (15) | 0.0247 (15) |
C2 | 0.0510 (17) | 0.0502 (16) | 0.0640 (19) | 0.0086 (13) | 0.0011 (14) | 0.0091 (14) |
C3 | 0.0556 (17) | 0.0485 (16) | 0.0580 (17) | 0.0070 (13) | 0.0034 (14) | 0.0145 (13) |
C4 | 0.060 (2) | 0.087 (2) | 0.074 (2) | −0.0060 (18) | −0.0076 (16) | 0.0336 (18) |
C5 | 0.070 (2) | 0.128 (3) | 0.098 (3) | −0.007 (2) | −0.025 (2) | 0.051 (3) |
C6 | 0.123 (4) | 0.119 (3) | 0.076 (3) | 0.001 (3) | −0.031 (3) | 0.026 (2) |
C7 | 0.126 (4) | 0.105 (3) | 0.056 (2) | 0.026 (3) | 0.008 (2) | 0.027 (2) |
C8 | 0.083 (2) | 0.078 (2) | 0.066 (2) | 0.0134 (19) | 0.0163 (19) | 0.0176 (18) |
C9 | 0.0322 (13) | 0.0427 (14) | 0.0492 (15) | −0.0013 (11) | −0.0073 (11) | 0.0191 (12) |
C10 | 0.0425 (15) | 0.0378 (14) | 0.0566 (16) | −0.0001 (11) | −0.0033 (12) | 0.0087 (12) |
C11 | 0.0409 (15) | 0.0342 (13) | 0.0544 (16) | 0.0046 (11) | 0.0007 (12) | 0.0086 (12) |
C12 | 0.0415 (14) | 0.0355 (13) | 0.0446 (14) | 0.0055 (11) | 0.0020 (11) | 0.0141 (11) |
C13 | 0.0465 (15) | 0.0410 (14) | 0.0498 (15) | −0.0022 (12) | −0.0011 (12) | 0.0192 (12) |
C14 | 0.0428 (15) | 0.0464 (15) | 0.0581 (17) | −0.0043 (12) | −0.0051 (13) | 0.0153 (13) |
C15 | 0.0555 (17) | 0.0498 (16) | 0.0436 (15) | 0.0113 (14) | −0.0053 (12) | 0.0149 (12) |
C16 | 0.0617 (19) | 0.0613 (18) | 0.0582 (18) | −0.0004 (15) | 0.0003 (15) | 0.0343 (15) |
C17 | 0.0482 (16) | 0.0591 (17) | 0.0623 (18) | −0.0054 (14) | 0.0002 (14) | 0.0298 (15) |
Br1—C15 | 1.903 (2) | C5—H5A | 0.9700 |
N1—C1 | 1.319 (3) | C5—H5B | 0.9700 |
N1—C9 | 1.357 (3) | C6—C7 | 1.499 (5) |
N2—C9 | 1.319 (3) | C6—H6A | 0.9700 |
N2—N3 | 1.373 (3) | C6—H6B | 0.9700 |
N3—C1 | 1.324 (3) | C7—C8 | 1.512 (5) |
N3—C2 | 1.447 (3) | C7—H7A | 0.9700 |
N4—C11 | 1.353 (3) | C7—H7B | 0.9700 |
N4—C12 | 1.412 (3) | C8—H8A | 0.9700 |
N4—H4 | 0.8600 | C8—H8B | 0.9700 |
O1—C11 | 1.215 (3) | C10—C11 | 1.510 (3) |
S1—C9 | 1.750 (3) | C10—H10A | 0.9700 |
S1—C10 | 1.793 (3) | C10—H10B | 0.9700 |
C1—H1 | 0.9300 | C12—C13 | 1.387 (3) |
C2—C3 | 1.519 (4) | C12—C17 | 1.388 (3) |
C2—H2A | 0.9700 | C13—C14 | 1.381 (3) |
C2—H2B | 0.9700 | C13—H13 | 0.9300 |
C3—C4 | 1.512 (4) | C14—C15 | 1.371 (4) |
C3—C8 | 1.525 (4) | C14—H14 | 0.9300 |
C3—H3 | 0.9800 | C15—C16 | 1.365 (4) |
C4—C5 | 1.525 (4) | C16—C17 | 1.382 (4) |
C4—H4A | 0.9700 | C16—H16 | 0.9300 |
C4—H4B | 0.9700 | C17—H17 | 0.9300 |
C5—C6 | 1.508 (5) | ||
C1—N1—C9 | 101.8 (2) | C6—C7—C8 | 112.0 (3) |
C9—N2—N3 | 101.66 (19) | C6—C7—H7A | 109.2 |
C1—N3—N2 | 109.2 (2) | C8—C7—H7A | 109.2 |
C1—N3—C2 | 130.5 (2) | C6—C7—H7B | 109.2 |
N2—N3—C2 | 120.3 (2) | C8—C7—H7B | 109.2 |
C11—N4—C12 | 127.3 (2) | H7A—C7—H7B | 107.9 |
C11—N4—H4 | 116.4 | C7—C8—C3 | 111.3 (3) |
C12—N4—H4 | 116.4 | C7—C8—H8A | 109.4 |
C9—S1—C10 | 100.22 (12) | C3—C8—H8A | 109.4 |
N1—C1—N3 | 111.7 (2) | C7—C8—H8B | 109.4 |
N1—C1—H1 | 124.1 | C3—C8—H8B | 109.4 |
N3—C1—H1 | 124.1 | H8A—C8—H8B | 108.0 |
N3—C2—C3 | 112.8 (2) | N2—C9—N1 | 115.6 (2) |
N3—C2—H2A | 109.0 | N2—C9—S1 | 123.67 (18) |
C3—C2—H2A | 109.0 | N1—C9—S1 | 120.7 (2) |
N3—C2—H2B | 109.0 | C11—C10—S1 | 120.69 (18) |
C3—C2—H2B | 109.0 | C11—C10—H10A | 107.2 |
H2A—C2—H2B | 107.8 | S1—C10—H10A | 107.2 |
C4—C3—C2 | 112.2 (2) | C11—C10—H10B | 107.2 |
C4—C3—C8 | 110.8 (3) | S1—C10—H10B | 107.2 |
C2—C3—C8 | 110.2 (2) | H10A—C10—H10B | 106.8 |
C4—C3—H3 | 107.8 | O1—C11—N4 | 123.6 (2) |
C2—C3—H3 | 107.8 | O1—C11—C10 | 117.7 (2) |
C8—C3—H3 | 107.8 | N4—C11—C10 | 118.6 (2) |
C3—C4—C5 | 111.9 (3) | C13—C12—C17 | 118.6 (2) |
C3—C4—H4A | 109.2 | C13—C12—N4 | 117.6 (2) |
C5—C4—H4A | 109.2 | C17—C12—N4 | 123.8 (2) |
C3—C4—H4B | 109.2 | C14—C13—C12 | 121.1 (2) |
C5—C4—H4B | 109.2 | C14—C13—H13 | 119.5 |
H4A—C4—H4B | 107.9 | C12—C13—H13 | 119.5 |
C6—C5—C4 | 111.2 (3) | C15—C14—C13 | 119.2 (2) |
C6—C5—H5A | 109.4 | C15—C14—H14 | 120.4 |
C4—C5—H5A | 109.4 | C13—C14—H14 | 120.4 |
C6—C5—H5B | 109.4 | C16—C15—C14 | 120.8 (2) |
C4—C5—H5B | 109.4 | C16—C15—Br1 | 119.7 (2) |
H5A—C5—H5B | 108.0 | C14—C15—Br1 | 119.5 (2) |
C7—C6—C5 | 111.2 (3) | C15—C16—C17 | 120.3 (2) |
C7—C6—H6A | 109.4 | C15—C16—H16 | 119.9 |
C5—C6—H6A | 109.4 | C17—C16—H16 | 119.9 |
C7—C6—H6B | 109.4 | C16—C17—C12 | 120.0 (3) |
C5—C6—H6B | 109.4 | C16—C17—H17 | 120.0 |
H6A—C6—H6B | 108.0 | C12—C17—H17 | 120.0 |
C9—N2—N3—C1 | −0.3 (3) | C1—N1—C9—S1 | 178.04 (18) |
C9—N2—N3—C2 | −179.5 (2) | C10—S1—C9—N2 | 6.0 (2) |
C9—N1—C1—N3 | 0.4 (3) | C10—S1—C9—N1 | −172.49 (19) |
N2—N3—C1—N1 | −0.1 (3) | C9—S1—C10—C11 | −81.3 (2) |
C2—N3—C1—N1 | 179.1 (2) | C12—N4—C11—O1 | 3.5 (4) |
C1—N3—C2—C3 | −112.1 (3) | C12—N4—C11—C10 | −176.2 (2) |
N2—N3—C2—C3 | 67.0 (3) | S1—C10—C11—O1 | −174.2 (2) |
N3—C2—C3—C4 | 63.3 (3) | S1—C10—C11—N4 | 5.5 (3) |
N3—C2—C3—C8 | −172.7 (2) | C11—N4—C12—C13 | 168.5 (2) |
C2—C3—C4—C5 | 177.8 (3) | C11—N4—C12—C17 | −9.8 (4) |
C8—C3—C4—C5 | 54.1 (4) | C17—C12—C13—C14 | 1.6 (4) |
C3—C4—C5—C6 | −54.9 (4) | N4—C12—C13—C14 | −176.8 (2) |
C4—C5—C6—C7 | 55.1 (5) | C12—C13—C14—C15 | −0.8 (4) |
C5—C6—C7—C8 | −55.9 (5) | C13—C14—C15—C16 | −0.4 (4) |
C6—C7—C8—C3 | 55.4 (4) | C13—C14—C15—Br1 | 179.86 (19) |
C4—C3—C8—C7 | −54.1 (4) | C14—C15—C16—C17 | 0.7 (4) |
C2—C3—C8—C7 | −178.8 (3) | Br1—C15—C16—C17 | −179.5 (2) |
N3—N2—C9—N1 | 0.5 (3) | C15—C16—C17—C12 | 0.1 (4) |
N3—N2—C9—S1 | −178.05 (16) | C13—C12—C17—C16 | −1.3 (4) |
C1—N1—C9—N2 | −0.6 (3) | N4—C12—C17—C16 | 177.0 (2) |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···S1 | 0.86 | 2.61 | 3.096 (2) | 117 |
N4—H4···N1i | 0.86 | 2.55 | 3.339 (3) | 153 |
C1—H1···O1ii | 0.93 | 2.29 | 3.214 (3) | 171 |
C13—H13···N1i | 0.93 | 2.48 | 3.342 (3) | 153 |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) x, y+1, z. |
Experimental details
Crystal data | |
Chemical formula | C17H21BrN4OS |
Mr | 409.35 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 298 |
a, b, c (Å) | 7.2061 (8), 9.521 (1), 14.2862 (16) |
α, β, γ (°) | 104.132 (1), 90.804 (1), 95.820 (1) |
V (Å3) | 944.84 (18) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 2.30 |
Crystal size (mm) | 0.25 × 0.16 × 0.12 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 1998) |
Tmin, Tmax | 0.597, 0.770 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8793, 4076, 2644 |
Rint | 0.025 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.038, 0.092, 1.01 |
No. of reflections | 4076 |
No. of parameters | 217 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.34, −0.42 |
Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4···S1 | 0.86 | 2.61 | 3.096 (2) | 116.7 |
N4—H4···N1i | 0.86 | 2.55 | 3.339 (3) | 153.1 |
C1—H1···O1ii | 0.93 | 2.29 | 3.214 (3) | 171.4 |
C13—H13···N1i | 0.93 | 2.48 | 3.342 (3) | 153.4 |
Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) x, y+1, z. |
Acknowledgements
This work was supported by the Fund for Fostering Talents of Kunming University of Science and Technology (grant No. 14118149) and the Natural Science Foundation of Yunnan Province (grant No. 619120090059 to YPW) and the Western Light Talent Culture Project of the Chinese Academy of Sciences (grant No. W8090303 to YPH).
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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.
The 1,2,4-triazole scaffold and its analogues are important pharmacophores that can be found in biologically active compounds across a number of different therapeutic areas; these include antifungal (Tafi, et al., 2002), antibacterial (Sui, et al., 1998), antiasthmatic (Naito, et al., 1996) and anticancer activities (Lin, et al., 2005), etc. In the course of our search for new anti-HIV-1 agents, we have synthesized a new series of 1,2,4-triazole analogues, including the title compound, (I), as potential HIV-1 inhibitors.
The chemical structure of (I) is shown in Fig.1. The molecule is stabilized by a weak intramolecular N4—H4···S1 hydrogen bond (Table 1). The cyclohexyl ring adopts the lowest energy chair conformation. The torsion angle (C1—N3—C2—C3), which describes the arrangement between the cyclohexyl ring and the triazole moiety, is -112.1 (3) °; the torsion angle C12—N4—C11—O1, which characterizes the location of the CONH2 group relative to the phenyl ring, is 3.5 (4) °.
In the crystal structure, centrosymmetric dimmers are formed by pairs of N4—H4···N1i and C13—H13···N1i hydrogen bonds [symmetry code: (i) -x + 1, -y + 2,-z + 1]. These dimmers are further linked into chains by weak C—H···O interactions (Table 1, Fig.2).