Literature DB >> 25484710

Crystal structure of 4,5-bis-(3,4,5-tri-meth-oxy-phen-yl)-2H-1,2,3-triazole methanol monosolvate.

Nikhil Reddy Madadi1, Narsimha Reddy Penthala1, Shobanbabu Bommagani1, Sean Parkin2, Peter A Crooks1.   

Abstract

The title compound, C20H23N3O6·CH3OH, was synthesized by [3 + 2] cyclo-addition of (Z)-2,3-bis-(3,4,5-tri-meth-oxy-phen-yl)acrylo-nitrile with sodium azide and ammonium chloride in DMF/water. The central nitro-gen of the triazole ring is protonated. The dihedral angles between the triazole ring and the 3,4,5-tri-meth-oxy-phenyl ring planes are 34.31 (4) and 45.03 (5)°, while that between the 3,4,5-tri-meth-oxy-phenyl rings is 51.87 (5)°. In the crystal, the mol-ecules, along with two methanol solvent mol-ecules are linked into an R (4) 4(10) centrosymmetric dimer by N-H⋯O and O-H⋯N hydrogen bonds.

Entities:  

Keywords:  1,2,3-triazole; crystal structure; hydrogen bonds

Year:  2014        PMID: 25484710      PMCID: PMC4257191          DOI: 10.1107/S1600536814020911

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


Related literature

The synthetic procedure has been described by Madadi et al. (2014 ▶) and by Penthala et al. (2014 ▶). For structure-related activity, see: Young & Chaplin (2004 ▶); Pettit et al. (1995 ▶); Hsieh et al. (2005 ▶); Carr et al. (2010 ▶); Banimustafa et al. (2013 ▶); Demchuk et al. (2014 ▶).

Experimental

Crystal data

C20H23N3O6·CH4O M = 433.45 Triclinic, a = 10.1458 (1) Å b = 10.6090 (1) Å c = 11.0435 (2) Å α = 89.5708 (6)° β = 72.5903 (6)° γ = 70.7146 (7)° V = 1065.07 (2) Å3 Z = 2 Mo Kα radiation μ = 0.10 mm−1 T = 90 K 0.24 × 0.22 × 0.20 mm

Data collection

Nonius KappaCCD diffractometer Absorption correction: multi-scan (SADABS; Sheldrick, 2008a ▶) T min = 0.882, T max = 0.970 28813 measured reflections 4887 independent reflections 3960 reflections with I > 2σ(I) R int = 0.037

Refinement

R[F 2 > 2σ(F 2)] = 0.045 wR(F 2) = 0.127 S = 1.05 4887 reflections 291 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.28 e Å−3 Δρmin = −0.30 e Å−3

Data collection: COLLECT (Nonius, 1998 ▶); cell refinement: SCALEPACK (Otwinowski & Minor, 2006 ▶); data reduction: DENZO-SMN (Otwinowski & Minor, 2006 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008b ▶); program(s) used to refine structure: SHELXL2013 (Sheldrick, 2008b ▶); molecular graphics: XP in (Sheldrick, 2008b ▶); software used to prepare material for publication: SHELX (Sheldrick, 2008b ▶). Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536814020911/sj5427sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536814020911/sj5427Isup2.hkl Click here for additional data file. Supporting information file. DOI: 10.1107/S1600536814020911/sj5427Isup3.cml Click here for additional data file. . DOI: 10.1107/S1600536814020911/sj5427fig1.tif A view of the asymmetric unit of the structure with the atom numbering scheme. Displacement ellipsoids are drawn at the 50% probability level and a hydrogen bond is drawn as a dashed line. CCDC reference: 1025101 Additional supporting information: crystallographic information; 3D view; checkCIF report
C20H23N3O6·CH4OZ = 2
Mr = 433.45F(000) = 460
Triclinic, P1Dx = 1.352 Mg m3
a = 10.1458 (1) ÅMo Kα radiation, λ = 0.71073 Å
b = 10.6090 (1) ÅCell parameters from 11695 reflections
c = 11.0435 (2) Åθ = 1.0–27.5°
α = 89.5708 (6)°µ = 0.10 mm1
β = 72.5903 (6)°T = 90 K
γ = 70.7146 (7)°Block, colourless
V = 1065.07 (2) Å30.24 × 0.22 × 0.20 mm
Nonius KappaCCD diffractometer4887 independent reflections
Radiation source: fine-focus sealed-tube3960 reflections with I > 2σ(I)
Detector resolution: 9.1 pixels mm-1Rint = 0.037
φ and ω scans at fixed χ = 55°θmax = 27.5°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Sheldrick, 2008a)h = −13→13
Tmin = 0.882, Tmax = 0.970k = −13→13
28813 measured reflectionsl = −14→14
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.045Hydrogen site location: difference Fourier map
wR(F2) = 0.127H atoms treated by a mixture of independent and constrained refinement
S = 1.05w = 1/[σ2(Fo2) + (0.0731P)2 + 0.3615P] where P = (Fo2 + 2Fc2)/3
4887 reflections(Δ/σ)max < 0.001
291 parametersΔρmax = 0.28 e Å3
0 restraintsΔρmin = −0.30 e Å3
Experimental. The crystal was mounted with polyisobutene oil on the tip of a fine glass fibre, fastened in a copper mounting pin with electrical solder. It was placed directly into the cold stream of a liquid nitrogen based cryostat.Diffraction data were collected with the crystal at 90 K, which is standard practice in this laboratory for the majority of flash-cooled crystals.
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.
xyzUiso*/Ueq
N10.60782 (12)0.74167 (11)0.56615 (11)0.0185 (2)
N20.73493 (13)0.64285 (12)0.54691 (11)0.0195 (3)
H2N0.8264 (19)0.6486 (17)0.5010 (16)0.023*
N30.72437 (12)0.53382 (11)0.60414 (11)0.0182 (2)
O10.10274 (10)1.12766 (9)0.78293 (10)0.0199 (2)
O2−0.09566 (10)1.00928 (10)0.79884 (9)0.0203 (2)
O3−0.01750 (10)0.74272 (10)0.76182 (10)0.0212 (2)
O40.55195 (11)0.11586 (9)0.76505 (9)0.0200 (2)
O50.35131 (11)0.22077 (10)0.98936 (9)0.0226 (2)
O60.26188 (10)0.48551 (10)1.06686 (9)0.0203 (2)
C10.34889 (14)0.77606 (13)0.68391 (12)0.0156 (3)
C20.30637 (14)0.91466 (13)0.71055 (12)0.0161 (3)
H20.37850.95600.70060.019*
C30.15713 (14)0.99221 (13)0.75193 (12)0.0160 (3)
C40.05096 (14)0.93156 (13)0.76591 (12)0.0162 (3)
C50.09440 (14)0.79251 (14)0.74196 (12)0.0171 (3)
C60.24333 (14)0.71422 (14)0.69882 (13)0.0177 (3)
H60.27280.61990.67980.021*
C70.50685 (14)0.69379 (13)0.64045 (12)0.0162 (3)
C80.57985 (14)0.56334 (13)0.66514 (12)0.0159 (3)
C90.52294 (14)0.47110 (13)0.74808 (13)0.0162 (3)
C100.56894 (14)0.33457 (13)0.70935 (13)0.0167 (3)
H100.63680.29880.62700.020*
C110.51433 (14)0.25086 (13)0.79276 (13)0.0161 (3)
C120.41268 (14)0.30331 (14)0.91361 (13)0.0172 (3)
C130.36502 (14)0.44122 (14)0.94987 (12)0.0165 (3)
C140.42169 (14)0.52434 (14)0.86842 (13)0.0170 (3)
H140.39160.61730.89460.020*
C150.20801 (16)1.19411 (14)0.76486 (15)0.0231 (3)
H15A0.27081.15870.81840.035*
H15B0.15651.29070.78870.035*
H15C0.26881.17850.67510.035*
C16−0.17239 (16)1.02141 (16)0.93261 (14)0.0265 (3)
H16A−0.16340.93190.96050.040*
H16B−0.27651.07450.94890.040*
H16C−0.12971.06610.97990.040*
C170.02045 (17)0.60063 (15)0.75393 (16)0.0279 (3)
H17A0.07980.56210.66630.042*
H17B−0.06940.57780.77810.042*
H17C0.07710.56420.81190.042*
C180.64600 (16)0.06014 (15)0.63927 (14)0.0242 (3)
H18A0.60150.10720.57680.036*
H18B0.6593−0.03540.62870.036*
H18C0.74170.07030.62590.036*
C190.38996 (17)0.19362 (16)1.10416 (14)0.0247 (3)
H19A0.49250.13381.08260.037*
H19B0.32560.15061.15930.037*
H19C0.37810.27801.14890.037*
C200.19984 (16)0.62778 (14)1.10034 (13)0.0220 (3)
H20A0.27720.66211.10440.033*
H20B0.12350.64761.18370.033*
H20C0.15640.67091.03580.033*
O1M1.00187 (11)0.66705 (10)0.42773 (10)0.0244 (2)
H1M1.08490.60760.41490.037*
C1M1.01117 (17)0.79571 (15)0.45053 (15)0.0269 (3)
H1M10.91190.86260.48140.040*
H1M21.06720.82060.37100.040*
H1M31.06080.79220.51480.040*
U11U22U33U12U13U23
N10.0160 (5)0.0170 (6)0.0195 (6)−0.0042 (4)−0.0029 (4)0.0023 (5)
N20.0155 (5)0.0163 (6)0.0228 (6)−0.0052 (4)−0.0011 (5)0.0035 (5)
N30.0172 (5)0.0164 (6)0.0194 (6)−0.0070 (4)−0.0022 (4)0.0033 (4)
O10.0167 (5)0.0148 (5)0.0270 (5)−0.0046 (4)−0.0063 (4)0.0008 (4)
O20.0127 (4)0.0229 (5)0.0217 (5)−0.0030 (4)−0.0039 (4)0.0033 (4)
O30.0166 (5)0.0193 (5)0.0281 (5)−0.0088 (4)−0.0047 (4)0.0020 (4)
O40.0235 (5)0.0141 (5)0.0203 (5)−0.0063 (4)−0.0039 (4)0.0011 (4)
O50.0322 (6)0.0247 (5)0.0171 (5)−0.0179 (5)−0.0077 (4)0.0070 (4)
O60.0205 (5)0.0186 (5)0.0170 (5)−0.0062 (4)0.0003 (4)0.0006 (4)
C10.0150 (6)0.0161 (6)0.0139 (6)−0.0034 (5)−0.0041 (5)0.0031 (5)
C20.0161 (6)0.0175 (7)0.0160 (6)−0.0074 (5)−0.0052 (5)0.0033 (5)
C30.0176 (6)0.0147 (6)0.0152 (6)−0.0041 (5)−0.0062 (5)0.0030 (5)
C40.0138 (6)0.0180 (7)0.0156 (6)−0.0034 (5)−0.0053 (5)0.0033 (5)
C50.0161 (6)0.0219 (7)0.0156 (6)−0.0087 (5)−0.0060 (5)0.0042 (5)
C60.0188 (6)0.0167 (7)0.0178 (6)−0.0069 (5)−0.0054 (5)0.0025 (5)
C70.0169 (6)0.0164 (7)0.0144 (6)−0.0061 (5)−0.0032 (5)0.0014 (5)
C80.0142 (6)0.0158 (6)0.0154 (6)−0.0043 (5)−0.0022 (5)−0.0007 (5)
C90.0147 (6)0.0164 (7)0.0179 (6)−0.0050 (5)−0.0061 (5)0.0031 (5)
C100.0151 (6)0.0172 (7)0.0162 (6)−0.0050 (5)−0.0033 (5)0.0012 (5)
C110.0167 (6)0.0138 (6)0.0195 (6)−0.0055 (5)−0.0080 (5)0.0026 (5)
C120.0187 (6)0.0196 (7)0.0169 (6)−0.0106 (5)−0.0064 (5)0.0050 (5)
C130.0140 (6)0.0201 (7)0.0151 (6)−0.0062 (5)−0.0040 (5)0.0022 (5)
C140.0168 (6)0.0153 (6)0.0186 (6)−0.0055 (5)−0.0052 (5)0.0015 (5)
C150.0216 (7)0.0172 (7)0.0318 (8)−0.0079 (6)−0.0089 (6)0.0026 (6)
C160.0197 (7)0.0293 (8)0.0235 (7)−0.0057 (6)−0.0001 (6)0.0031 (6)
C170.0246 (7)0.0220 (8)0.0373 (9)−0.0128 (6)−0.0047 (6)0.0022 (6)
C180.0259 (7)0.0177 (7)0.0246 (7)−0.0079 (6)−0.0011 (6)−0.0030 (6)
C190.0263 (7)0.0267 (8)0.0212 (7)−0.0093 (6)−0.0075 (6)0.0089 (6)
C200.0215 (7)0.0190 (7)0.0191 (7)−0.0030 (6)−0.0017 (5)−0.0013 (5)
O1M0.0200 (5)0.0177 (5)0.0302 (6)−0.0046 (4)−0.0028 (4)0.0040 (4)
C1M0.0278 (7)0.0227 (8)0.0301 (8)−0.0100 (6)−0.0073 (6)0.0020 (6)
N1—N21.3243 (16)C10—C111.3970 (18)
N1—C71.3473 (16)C10—H100.9500
N2—N31.3339 (16)C11—C121.4010 (19)
N2—H2N0.936 (17)C12—C131.4002 (19)
N3—C81.3455 (16)C13—C141.3895 (18)
O1—C31.3628 (16)C14—H140.9500
O1—C151.4301 (16)C15—H15A0.9800
O2—C41.3768 (15)C15—H15B0.9800
O2—C161.4330 (17)C15—H15C0.9800
O3—C51.3645 (16)C16—H16A0.9800
O3—C171.4236 (17)C16—H16B0.9800
O4—C111.3661 (16)C16—H16C0.9800
O4—C181.4268 (17)C17—H17A0.9800
O5—C121.3755 (16)C17—H17B0.9800
O5—C191.4358 (17)C17—H17C0.9800
O6—C131.3639 (16)C18—H18A0.9800
O6—C201.4326 (16)C18—H18B0.9800
C1—C21.3950 (19)C18—H18C0.9800
C1—C61.4006 (18)C19—H19A0.9800
C1—C71.4774 (18)C19—H19B0.9800
C2—C31.3954 (18)C19—H19C0.9800
C2—H20.9500C20—H20A0.9800
C3—C41.3982 (19)C20—H20B0.9800
C4—C51.3953 (19)C20—H20C0.9800
C5—C61.3950 (18)O1M—C1M1.4282 (18)
C6—H60.9500O1M—H1M0.8400
C7—C81.4057 (19)C1M—H1M10.9800
C8—C91.4743 (18)C1M—H1M20.9800
C9—C101.3936 (19)C1M—H1M30.9800
C9—C141.3970 (18)
N2—N1—C7104.56 (11)O6—C13—C12115.88 (11)
N1—N2—N3114.49 (11)C14—C13—C12120.27 (12)
N1—N2—H2N124.0 (10)C13—C14—C9119.97 (12)
N3—N2—H2N121.4 (11)C13—C14—H14120.0
N2—N3—C8105.06 (11)C9—C14—H14120.0
C3—O1—C15116.70 (10)O1—C15—H15A109.5
C4—O2—C16113.71 (10)O1—C15—H15B109.5
C5—O3—C17117.30 (11)H15A—C15—H15B109.5
C11—O4—C18116.84 (10)O1—C15—H15C109.5
C12—O5—C19116.01 (11)H15A—C15—H15C109.5
C13—O6—C20116.87 (10)H15B—C15—H15C109.5
C2—C1—C6120.65 (12)O2—C16—H16A109.5
C2—C1—C7119.59 (12)O2—C16—H16B109.5
C6—C1—C7119.77 (12)H16A—C16—H16B109.5
C1—C2—C3119.53 (12)O2—C16—H16C109.5
C1—C2—H2120.2H16A—C16—H16C109.5
C3—C2—H2120.2H16B—C16—H16C109.5
O1—C3—C2124.68 (12)O3—C17—H17A109.5
O1—C3—C4115.06 (11)O3—C17—H17B109.5
C2—C3—C4120.25 (12)H17A—C17—H17B109.5
O2—C4—C5120.10 (11)O3—C17—H17C109.5
O2—C4—C3120.05 (12)H17A—C17—H17C109.5
C5—C4—C3119.81 (12)H17B—C17—H17C109.5
O3—C5—C6124.27 (12)O4—C18—H18A109.5
O3—C5—C4115.33 (11)O4—C18—H18B109.5
C6—C5—C4120.39 (12)H18A—C18—H18B109.5
C5—C6—C1119.32 (12)O4—C18—H18C109.5
C5—C6—H6120.3H18A—C18—H18C109.5
C1—C6—H6120.3H18B—C18—H18C109.5
N1—C7—C8108.49 (11)O5—C19—H19A109.5
N1—C7—C1121.12 (12)O5—C19—H19B109.5
C8—C7—C1130.39 (12)H19A—C19—H19B109.5
N3—C8—C7107.40 (11)O5—C19—H19C109.5
N3—C8—C9121.97 (12)H19A—C19—H19C109.5
C7—C8—C9130.48 (12)H19B—C19—H19C109.5
C10—C9—C14120.46 (12)O6—C20—H20A109.5
C10—C9—C8121.60 (12)O6—C20—H20B109.5
C14—C9—C8117.94 (12)H20A—C20—H20B109.5
C9—C10—C11119.35 (12)O6—C20—H20C109.5
C9—C10—H10120.3H20A—C20—H20C109.5
C11—C10—H10120.3H20B—C20—H20C109.5
O4—C11—C10124.35 (12)C1M—O1M—H1M109.5
O4—C11—C12115.03 (11)O1M—C1M—H1M1109.5
C10—C11—C12120.62 (12)O1M—C1M—H1M2109.5
O5—C12—C13121.12 (12)H1M1—C1M—H1M2109.5
O5—C12—C11119.30 (12)O1M—C1M—H1M3109.5
C13—C12—C11119.29 (12)H1M1—C1M—H1M3109.5
O6—C13—C14123.85 (12)H1M2—C1M—H1M3109.5
C7—N1—N2—N3−0.41 (15)N2—N3—C8—C9−175.64 (12)
N1—N2—N3—C80.07 (16)N1—C7—C8—N3−0.54 (15)
C6—C1—C2—C3−0.27 (19)C1—C7—C8—N3−179.60 (13)
C7—C1—C2—C3−179.82 (12)N1—C7—C8—C9174.91 (13)
C15—O1—C3—C23.37 (19)C1—C7—C8—C9−4.1 (2)
C15—O1—C3—C4−177.50 (12)N3—C8—C9—C10−47.04 (19)
C1—C2—C3—O1178.74 (12)C7—C8—C9—C10138.07 (15)
C1—C2—C3—C4−0.36 (19)N3—C8—C9—C14132.31 (14)
C16—O2—C4—C585.75 (15)C7—C8—C9—C14−42.6 (2)
C16—O2—C4—C3−96.54 (15)C14—C9—C10—C11−0.87 (19)
O1—C3—C4—O24.99 (18)C8—C9—C10—C11178.47 (12)
C2—C3—C4—O2−175.83 (11)C18—O4—C11—C10−4.16 (18)
O1—C3—C4—C5−177.30 (11)C18—O4—C11—C12175.12 (12)
C2—C3—C4—C51.9 (2)C9—C10—C11—O4−179.85 (12)
C17—O3—C5—C68.57 (19)C9—C10—C11—C120.91 (19)
C17—O3—C5—C4−172.45 (12)C19—O5—C12—C13−72.53 (17)
O2—C4—C5—O3−4.09 (18)C19—O5—C12—C11113.70 (14)
C3—C4—C5—O3178.19 (12)O4—C11—C12—O5−4.85 (18)
O2—C4—C5—C6174.92 (12)C10—C11—C12—O5174.46 (11)
C3—C4—C5—C6−2.79 (19)O4—C11—C12—C13−178.74 (11)
O3—C5—C6—C1−178.92 (12)C10—C11—C12—C130.6 (2)
C4—C5—C6—C12.16 (19)C20—O6—C13—C146.21 (18)
C2—C1—C6—C5−0.6 (2)C20—O6—C13—C12−173.47 (11)
C7—C1—C6—C5178.93 (12)O5—C12—C13—O63.80 (18)
N2—N1—C7—C80.56 (15)C11—C12—C13—O6177.57 (11)
N2—N1—C7—C1179.72 (12)O5—C12—C13—C14−175.89 (12)
C2—C1—C7—N1−34.27 (18)C11—C12—C13—C14−2.11 (19)
C6—C1—C7—N1146.18 (13)O6—C13—C14—C9−177.50 (12)
C2—C1—C7—C8144.69 (15)C12—C13—C14—C92.16 (19)
C6—C1—C7—C8−34.9 (2)C10—C9—C14—C13−0.66 (19)
N2—N3—C8—C70.28 (15)C8—C9—C14—C13179.98 (12)
D—H···AD—HH···AD···AD—H···A
N2—H2N···O1M0.936 (17)1.797 (18)2.7303 (15)174.2 (16)
O1M—H1M···N3i0.841.972.8101 (15)177
Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A D—HH⋯A DA D—H⋯A
N2—H2N⋯O1M 0.936 (17)1.797 (18)2.7303 (15)174.2 (16)
O1M—H1M⋯N3i 0.841.972.8101 (15)177

Symmetry code: (i) .

  7 in total

1.  A short history of SHELX.

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

2.  L-Proline catalyzed one-step synthesis of 4,5-diaryl-2H-1,2,3-triazoles from heteroaryl cyanostilbenes via [3+2] cycloaddition of azide.

Authors:  Narsimha Reddy Penthala; Nikhil Reddy Madadi; Venumadhav Janganati; Peter A Crooks
Journal:  Tetrahedron Lett       Date:  2014-10-01       Impact factor: 2.415

3.  Lead identification of conformationally restricted β-lactam type combretastatin analogues: synthesis, antiproliferative activity and tubulin targeting effects.

Authors:  Miriam Carr; Lisa M Greene; Andrew J S Knox; David G Lloyd; Daniela M Zisterer; Mary J Meegan
Journal:  Eur J Med Chem       Date:  2010-09-22       Impact factor: 6.514

Review 4.  Pharmaceutical design of antimitotic agents based on combretastatins.

Authors:  H P Hsieh; J P Liou; N Mahindroo
Journal:  Curr Pharm Des       Date:  2005       Impact factor: 3.116

5.  Synthesis and biological evaluation of 3-(trimethoxyphenyl)-2(3H)-thiazole thiones as combretastatin analogs.

Authors:  Mandana Banimustafa; Asma Kheirollahi; Maliheh Safavi; Sussan Kabudanian Ardestani; Hassan Aryapour; Alireza Foroumadi; Saeed Emami
Journal:  Eur J Med Chem       Date:  2013-10-25       Impact factor: 6.514

Review 6.  Combretastatin A4 phosphate: background and current clinical status.

Authors:  Scott L Young; David J Chaplin
Journal:  Expert Opin Investig Drugs       Date:  2004-09       Impact factor: 6.206

7.  Antineoplastic agents. 291. Isolation and synthesis of combretastatins A-4, A-5, and A-6(1a)

Authors:  G R Pettit; S B Singh; M R Boyd; E Hamel; R K Pettit; J M Schmidt; F Hogan
Journal:  J Med Chem       Date:  1995-05-12       Impact factor: 7.446

  7 in total
  2 in total

1.  Synthesis and biological evaluation of novel 4,5-disubstituted 2H-1,2,3-triazoles as cis-constrained analogues of combretastatin A-4.

Authors:  Nikhil R Madadi; Narsimha R Penthala; Kevin Howk; Amit Ketkar; Robert L Eoff; Michael J Borrelli; Peter A Crooks
Journal:  Eur J Med Chem       Date:  2015-08-29       Impact factor: 6.514

2.  Comparison of crystal structures of 4-(benzo[b]thio-phen-2-yl)-5-(3,4,5-tri-meth-oxy-phen-yl)-2H-1,2,3-triazole and 4-(benzo[b]thio-phen-2-yl)-2-methyl-5-(3,4,5-tri-meth-oxy-phen-yl)-2H-1,2,3-triazole.

Authors:  Narsimha Reddy Penthala; Nikhil Reddy Madadi; Shobanbabu Bommagani; Sean Parkin; Peter A Crooks
Journal:  Acta Crystallogr Sect E Struct Rep Online       Date:  2014-10-24
  2 in total

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