Literature DB >> 22798843

5-(Adamantan-1-yl)-3-[(4-benzyl-piperazin-1-yl)meth-yl]-1,3,4-oxadiazole-2(3H)-thione.

Ali A El-Emam, Nasser R El-Brollosy, Mohamed I Attia, Mohammed Said-Abdelbaky, Santiago García-Granda.   

Abstract

The mol-ecule of the title compound, C(24)H(32)N(4)OS, is a functionalized 1,3,4-oxadiazole-2-thione with substituted piperazine and adamantanyl substituents attached at the 3- and 5-positions, respectively, of the oxadiazole spacer with an approximately C-shaped conformation. In the crystal, mol-ecules form dimers via C-H⋯S inter-action. The piperazine ring has a chair conformation; the substituents S, methyl-ene C and adamantane C of the essentially planar oxadiazole ring are approximately in the same plane, with distances of -0.046 (2), -0.085 (5) and 0.003 (4) Å, respectively. The dihedral angle between the planes of the phenyl and oxadiazole rings is 31.3 (3)°.

Entities:  

Year:  2012        PMID: 22798843      PMCID: PMC3393978          DOI: 10.1107/S1600536812027249

Source DB:  PubMed          Journal:  Acta Crystallogr Sect E Struct Rep Online        ISSN: 1600-5368


Related literature

For the biological activity of adamantyl-1,3,4-oxadiazole derivatives, see: Kadi et al. (2007 ▶, 2010 ▶); Al-Deeb et al. (2006 ▶), Vernier et al. (1969 ▶), El-Emam & Ibrahim (1991 ▶). For the synthesis of the title compound, see: El-Emam et al. (2004 ▶). For related adamantane structures, see: Almutairi et al. (2012 ▶); Al-Tamimi et al. (2010 ▶); Al-Abdullah et al. (2012 ▶). For related 1,3,4-oxadiazole structures, see: Fun et al. (2011 ▶); El-Emam et al. (2012 ▶).

Experimental

Crystal data

C24H32N4OS M = 424.61 Monoclinic, a = 11.6417 (9) Å b = 17.198 (2) Å c = 12.774 (1) Å β = 115.06 (1)° V = 2316.8 (4) Å3 Z = 4 Cu Kα radiation μ = 1.41 mm−1 T = 293 K 0.11 × 0.09 × 0.02 mm

Data collection

Oxford Diffraction Xcalibur Ruby Gemini diffractometer Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010 ▶) T min = 0.857, T max = 0.975 9969 measured reflections 4368 independent reflections 2049 reflections with I > 2σ(I) R int = 0.069

Refinement

R[F 2 > 2σ(F 2)] = 0.071 wR(F 2) = 0.219 S = 1.01 4368 reflections 271 parameters H-atom parameters constrained Δρmax = 0.46 e Å−3 Δρmin = −0.22 e Å−3 Data collection: CrysAlis CCD (Oxford Diffraction, 2010 ▶); cell refinement: CrysAlis CCD; data reduction: CrysAlis RED (Oxford Diffraction, 2010 ▶); program(s) used to solve structure: SIR92 (Altomare et al., 1994 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997 ▶) and Mercury (Macrae et al., 2008 ▶); software used to prepare material for publication: WinGX (Farrugia, 1999 ▶), PLATON (Spek, 2009 ▶), PARST95 (Nardelli, 1995 ▶) and publCIF (Westrip, 2010 ▶). Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536812027249/ff2070sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536812027249/ff2070Isup2.hkl Supplementary material file. DOI: 10.1107/S1600536812027249/ff2070Isup3.cml Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C24H32N4OSF(000) = 912
Mr = 424.61Dx = 1.217 Mg m3
Monoclinic, P21/cCu Kα radiation, λ = 1.54180 Å
Hall symbol: -P 2ybcCell parameters from 1030 reflections
a = 11.6417 (9) Åθ = 3.8–70.6°
b = 17.198 (2) ŵ = 1.41 mm1
c = 12.774 (1) ÅT = 293 K
β = 115.06 (1)°Prismatic, colourless
V = 2316.8 (4) Å30.11 × 0.09 × 0.02 mm
Z = 4
Oxford Diffraction Xcalibur Ruby Gemini diffractometer4368 independent reflections
Radiation source: fine-focus sealed tube2049 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.069
Detector resolution: 10.2673 pixels mm-1θmax = 70.7°, θmin = 4.2°
ω scansh = −14→13
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2010)k = −17→21
Tmin = 0.857, Tmax = 0.975l = −15→15
9969 measured reflections
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.071Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.219H-atom parameters constrained
S = 1.01w = 1/[σ2(Fo2) + (0.0727P)2] where P = (Fo2 + 2Fc2)/3
4368 reflections(Δ/σ)max < 0.001
271 parametersΔρmax = 0.46 e Å3
0 restraintsΔρmin = −0.22 e Å3
Experimental. Absorption correction: CrysAlis PRO (Oxford Diffraction, 2010) Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm.
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.
xyzUiso*/Ueq
S10.87513 (13)0.09736 (11)0.58610 (13)0.1011 (6)
O10.6438 (3)0.15777 (18)0.4778 (2)0.0621 (8)
N30.8803 (3)0.1628 (2)0.2778 (3)0.0581 (9)
N40.8057 (3)0.0547 (2)0.0914 (3)0.0577 (9)
N20.7676 (3)0.1910 (2)0.3997 (3)0.0588 (9)
N10.6514 (3)0.2280 (2)0.3359 (3)0.0579 (9)
C10.5809 (4)0.2066 (2)0.3858 (3)0.0502 (9)
C150.4469 (3)0.2263 (2)0.3571 (3)0.0489 (9)
C60.7735 (4)0.1783 (3)0.1668 (4)0.0606 (11)
H6A0.76550.23390.15270.073*
H6B0.69570.15990.16880.073*
C90.6932 (4)0.0165 (3)−0.1133 (4)0.0623 (11)
C70.7926 (4)0.1384 (3)0.0711 (4)0.0639 (11)
H7A0.72080.1488−0.00200.077*
H7B0.86820.15860.06670.077*
C50.9163 (4)0.0404 (3)0.2003 (4)0.0670 (12)
H5A0.99170.06030.19520.080*
H5B0.9271−0.01520.21430.080*
C40.9009 (4)0.0790 (3)0.2991 (4)0.0612 (11)
H4A0.82930.05640.30800.073*
H4B0.97630.07040.37010.073*
C160.4394 (4)0.2710 (3)0.4570 (4)0.0722 (13)
H16A0.48830.31860.47070.087*
H16B0.47490.23980.52680.087*
C20.7658 (4)0.1489 (3)0.4861 (4)0.0637 (11)
C80.8150 (4)0.0136 (3)−0.0047 (4)0.0712 (13)
H8A0.8372−0.04030.01700.085*
H8B0.88250.0366−0.02000.085*
C30.8766 (4)0.2065 (3)0.3718 (4)0.0651 (12)
H3A0.87640.26130.35410.078*
H3B0.95400.19610.44020.078*
C210.2521 (4)0.2984 (4)0.2190 (4)0.0848 (16)
H210.21640.33130.14990.102*
C170.2980 (5)0.2908 (3)0.4275 (4)0.0810 (15)
H170.29190.31890.49170.097*
C140.6870 (5)0.0445 (3)−0.2163 (4)0.0781 (14)
H140.76040.0629−0.21960.094*
C240.3926 (4)0.2767 (4)0.2486 (4)0.0810 (15)
H24A0.39670.24860.18440.097*
H24B0.44270.32370.26100.097*
C100.5819 (4)−0.0092 (3)−0.1108 (4)0.0698 (12)
H100.5831−0.0273−0.04170.084*
C190.2511 (5)0.3400 (3)0.3222 (5)0.0881 (16)
H19A0.30370.38610.33740.106*
H19B0.16530.35660.30460.106*
C220.1798 (5)0.2217 (4)0.1996 (5)0.098 (2)
H22A0.09050.23240.17600.118*
H22B0.18830.19310.13770.118*
C110.4697 (5)−0.0085 (3)−0.2086 (5)0.0816 (15)
H110.3960−0.0268−0.20550.098*
C120.4655 (6)0.0190 (3)−0.3111 (5)0.0928 (18)
H120.38950.0193−0.37730.111*
C230.3697 (4)0.1522 (3)0.3371 (5)0.0806 (15)
H23A0.40320.12040.40640.097*
H23B0.37510.12260.27470.097*
C200.2280 (5)0.1735 (4)0.3056 (5)0.0895 (17)
H200.17740.12590.29210.107*
C180.2269 (5)0.2162 (4)0.4060 (5)0.0908 (17)
H18A0.26410.18370.47430.109*
H18B0.13980.22690.39220.109*
C130.5746 (7)0.0460 (3)−0.3148 (5)0.0962 (19)
H130.57270.0652−0.38350.115*
U11U22U33U12U13U23
S10.0724 (8)0.1413 (14)0.0814 (9)0.0392 (9)0.0245 (7)0.0333 (9)
O10.0553 (16)0.078 (2)0.0531 (16)0.0100 (15)0.0228 (13)0.0091 (15)
N30.0456 (17)0.062 (2)0.065 (2)0.0015 (16)0.0219 (16)−0.0016 (18)
N40.0491 (17)0.060 (2)0.058 (2)0.0056 (16)0.0174 (16)0.0011 (17)
N20.0415 (17)0.071 (2)0.063 (2)0.0038 (16)0.0215 (15)0.0008 (18)
N10.0446 (17)0.066 (2)0.063 (2)0.0033 (16)0.0225 (16)0.0017 (18)
C10.046 (2)0.053 (2)0.047 (2)−0.0005 (18)0.0147 (17)−0.0036 (18)
C150.0444 (19)0.056 (2)0.044 (2)−0.0053 (17)0.0167 (16)−0.0058 (18)
C60.052 (2)0.062 (3)0.063 (3)0.005 (2)0.020 (2)0.005 (2)
C90.061 (3)0.063 (3)0.063 (3)−0.001 (2)0.026 (2)−0.006 (2)
C70.058 (2)0.064 (3)0.069 (3)0.002 (2)0.027 (2)0.009 (2)
C50.048 (2)0.061 (3)0.077 (3)0.003 (2)0.012 (2)−0.003 (2)
C40.045 (2)0.067 (3)0.060 (3)0.0044 (19)0.0115 (18)0.004 (2)
C160.050 (2)0.096 (4)0.066 (3)0.001 (2)0.021 (2)−0.016 (3)
C20.047 (2)0.076 (3)0.062 (3)0.009 (2)0.018 (2)0.001 (2)
C80.055 (2)0.084 (3)0.072 (3)0.001 (2)0.025 (2)−0.006 (3)
C30.041 (2)0.081 (3)0.072 (3)−0.005 (2)0.023 (2)−0.009 (2)
C210.058 (3)0.129 (5)0.061 (3)0.007 (3)0.020 (2)0.020 (3)
C170.076 (3)0.105 (4)0.070 (3)0.003 (3)0.037 (3)−0.015 (3)
C140.099 (4)0.068 (3)0.078 (3)−0.008 (3)0.047 (3)0.001 (3)
C240.064 (3)0.110 (4)0.070 (3)0.018 (3)0.029 (2)0.020 (3)
C100.064 (3)0.074 (3)0.070 (3)−0.004 (2)0.028 (2)0.001 (2)
C190.083 (3)0.085 (4)0.103 (4)0.019 (3)0.046 (3)0.002 (3)
C220.062 (3)0.140 (5)0.070 (3)0.017 (3)0.005 (3)−0.025 (4)
C110.059 (3)0.074 (3)0.096 (4)−0.003 (2)0.018 (3)−0.008 (3)
C120.088 (4)0.073 (3)0.083 (4)0.010 (3)0.002 (3)−0.015 (3)
C230.061 (3)0.071 (3)0.101 (4)−0.010 (2)0.025 (3)−0.005 (3)
C200.072 (3)0.091 (4)0.107 (5)−0.023 (3)0.038 (3)−0.016 (4)
C180.064 (3)0.123 (5)0.089 (4)−0.004 (3)0.035 (3)0.012 (4)
C130.134 (5)0.077 (4)0.069 (4)0.009 (4)0.034 (4)0.004 (3)
S1—C21.631 (4)C8—H8B0.9700
O1—C11.376 (5)C3—H3A0.9700
O1—C21.387 (5)C3—H3B0.9700
N3—C31.432 (6)C21—C191.504 (8)
N3—C61.461 (5)C21—C221.528 (9)
N3—C41.468 (6)C21—C241.560 (7)
N4—C71.459 (6)C21—H210.9800
N4—C81.460 (6)C17—C191.484 (8)
N4—C51.462 (5)C17—C181.487 (8)
N2—C21.327 (6)C17—H170.9800
N2—N11.403 (5)C14—C131.379 (8)
N2—C31.480 (5)C14—H140.9300
N1—C11.287 (5)C24—H24A0.9700
C1—C151.483 (5)C24—H24B0.9700
C15—C231.518 (6)C10—C111.374 (6)
C15—C161.524 (6)C10—H100.9300
C15—C241.526 (6)C19—H19A0.9700
C6—C71.498 (6)C19—H19B0.9700
C6—H6A0.9700C22—C201.481 (8)
C6—H6B0.9700C22—H22A0.9700
C9—C141.372 (7)C22—H22B0.9700
C9—C101.382 (6)C11—C121.373 (8)
C9—C81.508 (6)C11—H110.9300
C7—H7A0.9700C12—C131.371 (8)
C7—H7B0.9700C12—H120.9300
C5—C41.503 (6)C23—C201.566 (7)
C5—H5A0.9700C23—H23A0.9700
C5—H5B0.9700C23—H23B0.9700
C4—H4A0.9700C20—C181.483 (8)
C4—H4B0.9700C20—H200.9800
C16—C171.562 (7)C18—H18A0.9700
C16—H16A0.9700C18—H18B0.9700
C16—H16B0.9700C13—H130.9300
C8—H8A0.9700
C1—O1—C2106.8 (3)N2—C3—H3B108.2
C3—N3—C6113.7 (3)H3A—C3—H3B107.4
C3—N3—C4114.8 (4)C19—C21—C22110.2 (5)
C6—N3—C4111.3 (3)C19—C21—C24107.3 (4)
C7—N4—C8111.5 (4)C22—C21—C24106.3 (5)
C7—N4—C5108.6 (3)C19—C21—H21111.0
C8—N4—C5111.7 (3)C22—C21—H21111.0
C2—N2—N1112.3 (3)C24—C21—H21111.0
C2—N2—C3128.0 (4)C19—C17—C18111.2 (4)
N1—N2—C3119.5 (4)C19—C17—C16106.8 (4)
C1—N1—N2104.0 (3)C18—C17—C16107.7 (5)
N1—C1—O1112.2 (3)C19—C17—H17110.4
N1—C1—C15129.5 (4)C18—C17—H17110.4
O1—C1—C15118.3 (3)C16—C17—H17110.4
C1—C15—C23109.6 (4)C9—C14—C13121.7 (5)
C1—C15—C16109.7 (3)C9—C14—H14119.1
C23—C15—C16108.9 (4)C13—C14—H14119.1
C1—C15—C24110.0 (3)C15—C24—C21110.2 (4)
C23—C15—C24109.6 (4)C15—C24—H24A109.6
C16—C15—C24109.0 (4)C21—C24—H24A109.6
N3—C6—C7110.4 (4)C15—C24—H24B109.6
N3—C6—H6A109.6C21—C24—H24B109.6
C7—C6—H6A109.6H24A—C24—H24B108.1
N3—C6—H6B109.6C11—C10—C9121.0 (5)
C7—C6—H6B109.6C11—C10—H10119.5
H6A—C6—H6B108.1C9—C10—H10119.5
C14—C9—C10117.7 (4)C17—C19—C21112.8 (5)
C14—C9—C8122.7 (5)C17—C19—H19A109.0
C10—C9—C8119.5 (4)C21—C19—H19A109.0
N4—C7—C6110.3 (4)C17—C19—H19B109.0
N4—C7—H7A109.6C21—C19—H19B109.0
C6—C7—H7A109.6H19A—C19—H19B107.8
N4—C7—H7B109.6C20—C22—C21111.5 (4)
C6—C7—H7B109.6C20—C22—H22A109.3
H7A—C7—H7B108.1C21—C22—H22A109.3
N4—C5—C4110.7 (4)C20—C22—H22B109.3
N4—C5—H5A109.5C21—C22—H22B109.3
C4—C5—H5A109.5H22A—C22—H22B108.0
N4—C5—H5B109.5C12—C11—C10120.4 (5)
C4—C5—H5B109.5C12—C11—H11119.8
H5A—C5—H5B108.1C10—C11—H11119.8
N3—C4—C5110.3 (4)C13—C12—C11119.3 (5)
N3—C4—H4A109.6C13—C12—H12120.3
C5—C4—H4A109.6C11—C12—H12120.3
N3—C4—H4B109.6C15—C23—C20109.3 (4)
C5—C4—H4B109.6C15—C23—H23A109.8
H4A—C4—H4B108.1C20—C23—H23A109.8
C15—C16—C17109.7 (3)C15—C23—H23B109.8
C15—C16—H16A109.7C20—C23—H23B109.8
C17—C16—H16A109.7H23A—C23—H23B108.3
C15—C16—H16B109.7C22—C20—C18112.0 (5)
C17—C16—H16B109.7C22—C20—C23108.4 (5)
H16A—C16—H16B108.2C18—C20—C23106.7 (5)
N2—C2—O1104.7 (3)C22—C20—H20109.9
N2—C2—S1131.7 (3)C18—C20—H20109.9
O1—C2—S1123.6 (4)C23—C20—H20109.9
N4—C8—C9112.4 (4)C20—C18—C17112.2 (5)
N4—C8—H8A109.1C20—C18—H18A109.2
C9—C8—H8A109.1C17—C18—H18A109.2
N4—C8—H8B109.1C20—C18—H18B109.2
C9—C8—H8B109.1C17—C18—H18B109.2
H8A—C8—H8B107.9H18A—C18—H18B107.9
N3—C3—N2116.2 (3)C12—C13—C14119.8 (6)
N3—C3—H3A108.2C12—C13—H13120.1
N2—C3—H3A108.2C14—C13—H13120.1
N3—C3—H3B108.2
C2—N2—N1—C1−0.5 (5)C4—N3—C3—N2−67.1 (5)
C3—N2—N1—C1−175.9 (4)C2—N2—C3—N3102.8 (5)
N2—N1—C1—O1−0.1 (4)N1—N2—C3—N3−82.5 (5)
N2—N1—C1—C15−179.5 (4)C15—C16—C17—C19−60.8 (6)
C2—O1—C1—N10.7 (4)C15—C16—C17—C1858.7 (6)
C2—O1—C1—C15−179.9 (3)C10—C9—C14—C13−1.0 (8)
N1—C1—C15—C23123.4 (5)C8—C9—C14—C13179.4 (5)
O1—C1—C15—C23−55.9 (5)C1—C15—C24—C21−179.3 (4)
N1—C1—C15—C16−117.1 (5)C23—C15—C24—C2160.1 (6)
O1—C1—C15—C1663.5 (5)C16—C15—C24—C21−59.0 (5)
N1—C1—C15—C242.8 (6)C19—C21—C24—C1558.0 (6)
O1—C1—C15—C24−176.5 (4)C22—C21—C24—C15−59.9 (6)
C3—N3—C6—C7172.9 (4)C14—C9—C10—C111.5 (7)
C4—N3—C6—C7−55.5 (5)C8—C9—C10—C11−178.9 (5)
C8—N4—C7—C6175.8 (3)C18—C17—C19—C21−54.3 (6)
C5—N4—C7—C6−60.7 (5)C16—C17—C19—C2162.9 (6)
N3—C6—C7—N458.8 (5)C22—C21—C19—C1753.6 (6)
C7—N4—C5—C460.2 (5)C24—C21—C19—C17−61.7 (6)
C8—N4—C5—C4−176.4 (4)C19—C21—C22—C20−53.4 (6)
C3—N3—C4—C5−174.3 (3)C24—C21—C22—C2062.6 (6)
C6—N3—C4—C554.7 (5)C9—C10—C11—C12−1.0 (8)
N4—C5—C4—N3−57.3 (5)C10—C11—C12—C13−0.2 (9)
C1—C15—C16—C17−179.2 (4)C1—C15—C23—C20−179.4 (4)
C23—C15—C16—C17−59.3 (5)C16—C15—C23—C2060.7 (5)
C24—C15—C16—C1760.3 (5)C24—C15—C23—C20−58.5 (6)
N1—N2—C2—O10.9 (5)C21—C22—C20—C1854.6 (6)
C3—N2—C2—O1175.8 (4)C21—C22—C20—C23−62.8 (6)
N1—N2—C2—S1−178.2 (4)C15—C23—C20—C2259.6 (6)
C3—N2—C2—S1−3.3 (8)C15—C23—C20—C18−61.2 (6)
C1—O1—C2—N2−0.9 (4)C22—C20—C18—C17−55.2 (6)
C1—O1—C2—S1178.3 (3)C23—C20—C18—C1763.3 (6)
C7—N4—C8—C9−67.9 (5)C19—C17—C18—C2054.3 (6)
C5—N4—C8—C9170.4 (4)C16—C17—C18—C20−62.4 (6)
C14—C9—C8—N4124.2 (5)C11—C12—C13—C140.7 (9)
C10—C9—C8—N4−55.3 (6)C9—C14—C13—C12−0.1 (9)
C6—N3—C3—N262.8 (5)
D—H···AD—HH···AD···AD—H···A
C5—H5B···S1i0.972.973.652 (5)128 (1)
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
C5—H5B⋯S1i 0.972.973.652 (5)128 (1)

Symmetry code: (i) .

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Authors:  George M Sheldrick
Journal:  Acta Crystallogr A       Date:  2007-12-21       Impact factor: 2.290

2.  The toxicologic and pharmacologic properties of amantadine hydrochloride.

Authors:  V G Vernier; J B Harmon; J M Stump; T E Lynes; J P Marvel; D H Smith
Journal:  Toxicol Appl Pharmacol       Date:  1969-11       Impact factor: 4.219

3.  Synthesis, antimicrobial and anti-inflammatory activities of novel 5-(1-adamantyl)-1,3,4-thiadiazole derivatives.

Authors:  Adnan A Kadi; Ebtehal S Al-Abdullah; Ihsan A Shehata; Elsayed E Habib; Tarek M Ibrahim; Ali A El-Emam
Journal:  Eur J Med Chem       Date:  2010-08-12       Impact factor: 6.514

4.  Synthesis, antimicrobial, and anti-HIV-1 activity of certain 5-(1-adamantyl)-2-substituted thio-1,3,4-oxadiazoles and 5-(1-adamantyl)-3-substituted aminomethyl-1,3,4-oxadiazoline-2-thiones.

Authors:  Ali A El-Emam; Omar A Al-Deeb; Mohamed Al-Omar; Jochen Lehmann
Journal:  Bioorg Med Chem       Date:  2004-10-01       Impact factor: 3.641

5.  Synthesis and anti-inflammatory and analgesic activity of some 3-(1-adamantyl)-4-substituted-5-mercapto-1,2,4-triazoles.

Authors:  A A el-Emam; T M Ibrahim
Journal:  Arzneimittelforschung       Date:  1991-12

6.  5-(4,4''-Difluoro-5'-hy-droxy-1,1':3',1''-terphenyl-4'-yl)-3-(morpholin-4-ylmeth-yl)-1,3,4-oxadiazole-2(3H)-thione.

Authors:  Hoong-Kun Fun; Suhana Arshad; S Samshuddin; B Narayana; B K Sarojini
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2011-11-19

7.  3-(Adamantan-1-yl)-4-(prop-2-en-1-yl)-1H-1,2,4-triazole-5(4H)-thione.

Authors:  Maha S Almutairi; Mona M Al-Shehri; Ali A El-Emam; Seik Weng Ng; Edward R T Tiekink
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2012-02-10

8.  2-(Adamantan-1-yl)-5-(4-nitro-phen-yl)-1,3,4-oxadiazole.

Authors:  Ali A El-Emam; Adnan A Kadi; Nasser R El-Brollosy; Seik Weng Ng; Edward R T Tiekink
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2012-02-24

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Authors:  Ebtehal S Al-Abdullah; Hanadi H Asiri; Ali El-Emam; Seik Weng Ng
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2012-01-11

10.  Structure validation in chemical crystallography.

Authors:  Anthony L Spek
Journal:  Acta Crystallogr D Biol Crystallogr       Date:  2009-01-20
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