Literature DB >> 22412681

2-(8-Bromo-imidazo[1,2-a]pyridin-2-yl)-N'-[(E)-4-diethyl-amino-2-hy-droxy-benzyl-idene]acetohydrazide dihydrate.

Hoong-Kun Fun, Wan-Sin Loh, Seema Shenvi, Arun M Isloor, Gurumurthy Hegde.   

Abstract

In the title compound, C(20)H(22)BrN(5)O(2)·2H(2)O, the Schiff base mol-ecule exists in an E conformation with respect to the acyclic C=N bond. An S(6) ring motif is formed via an intra-molecular O-H⋯N hydrogen bond. The dihedral angle between the imidazo[1,2-a]pyridine system and the benzene ring is 84.62 (5)°. In the crystal, N-H⋯O, O-H⋯O, O-H⋯N, C-H⋯O and C-H⋯Br hydrogen bonds link the mol-ecules into a three-dimensional network. The crystal packing is further stabilized by C-H⋯π and π-π inter-actions [centroid-centroid distance = 3.5365 (7) Å].

Entities:  

Year:  2012        PMID: 22412681      PMCID: PMC3297878          DOI: 10.1107/S160053681200685X

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


Related literature

For background to and applications of hydrazones, see: Seleem et al. (2011 ▶); Rollas & Küçükgüzel (2007 ▶). For background to and applications of imidazopyridine, see: Ertepinarl et al. (1995 ▶); Liang et al. (2007 ▶); Hamdouchi et al. (1999 ▶); Gudmundsson & Johns (2007 ▶); Biftu et al. (2006 ▶); Fisher & Lusi (1972 ▶); Bochis et al. (1981 ▶). For hydrogen-bond motifs, see: Bernstein et al. (1995 ▶). For the stability of the temperature controller used for the data collection, see: Cosier & Glazer (1986 ▶).

Experimental

Crystal data

C20H22BrN5O2·2H2O M = 480.37 Triclinic, a = 8.4370 (4) Å b = 10.6711 (5) Å c = 11.7559 (5) Å α = 92.914 (1)° β = 96.949 (1)° γ = 93.978 (1)° V = 1046.23 (8) Å3 Z = 2 Mo Kα radiation μ = 2.00 mm−1 T = 100 K 0.37 × 0.20 × 0.07 mm

Data collection

Bruker SMART APEXII CCD diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2009 ▶) T min = 0.529, T max = 0.869 22937 measured reflections 6491 independent reflections 5841 reflections with I > 2σ(I) R int = 0.023

Refinement

R[F 2 > 2σ(F 2)] = 0.027 wR(F 2) = 0.077 S = 1.05 6491 reflections 297 parameters H atoms treated by a mixture of independent and constrained refinement Δρmax = 0.63 e Å−3 Δρmin = −0.24 e Å−3 Data collection: APEX2 (Bruker, 2009 ▶); cell refinement: SAINT (Bruker, 2009 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009 ▶). Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S160053681200685X/bq2340sup1.cif Structure factors: contains datablock(s) I. DOI: 10.1107/S160053681200685X/bq2340Isup2.hkl Supplementary material file. DOI: 10.1107/S160053681200685X/bq2340Isup3.cml Additional supplementary materials: crystallographic information; 3D view; checkCIF report
C20H22BrN5O2·2H2OZ = 2
Mr = 480.37F(000) = 496
Triclinic, P1Dx = 1.525 Mg m3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.4370 (4) ÅCell parameters from 9983 reflections
b = 10.6711 (5) Åθ = 2.4–30.9°
c = 11.7559 (5) ŵ = 2.00 mm1
α = 92.914 (1)°T = 100 K
β = 96.949 (1)°Plate, orange
γ = 93.978 (1)°0.37 × 0.20 × 0.07 mm
V = 1046.23 (8) Å3
Bruker SMART APEXII CCD diffractometer6491 independent reflections
Radiation source: fine-focus sealed tube5841 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.023
φ and ω scansθmax = 30.9°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2009)h = −12→12
Tmin = 0.529, Tmax = 0.869k = −15→15
22937 measured reflectionsl = −16→16
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.027Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.077H atoms treated by a mixture of independent and constrained refinement
S = 1.05w = 1/[σ2(Fo2) + (0.0455P)2 + 0.2952P] where P = (Fo2 + 2Fc2)/3
6491 reflections(Δ/σ)max = 0.002
297 parametersΔρmax = 0.63 e Å3
0 restraintsΔρmin = −0.24 e Å3
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K.
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
Br10.789019 (15)0.424051 (13)0.748329 (12)0.02141 (5)
O1−0.05933 (11)0.23815 (10)0.52050 (9)0.02047 (19)
O2−0.26058 (13)0.04472 (10)0.79255 (9)0.0227 (2)
N10.44340 (12)0.35221 (10)0.59413 (9)0.01348 (19)
N20.35279 (12)0.54369 (10)0.61740 (9)0.01344 (19)
N30.10753 (13)0.09994 (10)0.60467 (9)0.01444 (19)
N4−0.00110 (13)0.05569 (10)0.67606 (9)0.0150 (2)
N5−0.25929 (13)−0.22618 (11)1.10154 (9)0.0164 (2)
C10.47756 (14)0.46769 (11)0.64404 (10)0.0127 (2)
C20.61422 (15)0.52232 (12)0.71616 (11)0.0147 (2)
C30.62011 (16)0.64472 (13)0.75761 (11)0.0174 (2)
H3A0.70930.67990.80590.021*
C40.48898 (17)0.71799 (12)0.72639 (11)0.0182 (2)
H4A0.49350.80150.75420.022*
C50.35760 (16)0.66812 (12)0.65681 (11)0.0175 (2)
H5A0.27250.71670.63610.021*
C60.23518 (14)0.47094 (12)0.54616 (11)0.0153 (2)
H6A0.13710.49570.51350.018*
C70.29303 (14)0.35486 (12)0.53359 (10)0.0134 (2)
C80.20850 (15)0.23836 (12)0.46996 (11)0.0155 (2)
H8A0.28310.17370.46490.019*
H8B0.16740.25740.39260.019*
C90.07088 (14)0.19108 (12)0.53330 (11)0.0143 (2)
C100.05212 (15)−0.02976 (12)0.74143 (11)0.0158 (2)
H10A0.1519−0.05820.73260.019*
C11−0.03602 (15)−0.08324 (12)0.82756 (11)0.0146 (2)
C120.03051 (15)−0.17581 (13)0.89465 (12)0.0175 (2)
H12A0.1274−0.20480.87880.021*
C13−0.04169 (15)−0.22574 (12)0.98328 (11)0.0173 (2)
H13A0.0055−0.28831.02470.021*
C14−0.18834 (15)−0.18158 (12)1.01136 (10)0.0144 (2)
C15−0.25764 (15)−0.08989 (12)0.94303 (11)0.0156 (2)
H15A−0.3549−0.06100.95820.019*
C16−0.18382 (15)−0.04205 (12)0.85370 (11)0.0147 (2)
C17−0.19118 (17)−0.32564 (13)1.16815 (12)0.0196 (2)
H17A−0.2326−0.32431.24160.024*
H17B−0.0760−0.30761.18310.024*
C18−0.2262 (2)−0.45760 (14)1.11027 (14)0.0265 (3)
H18A−0.1691−0.51641.15550.040*
H18B−0.1926−0.45861.03510.040*
H18C−0.3391−0.48081.10380.040*
C19−0.41481 (16)−0.18615 (13)1.12605 (11)0.0186 (2)
H19A−0.4149−0.09581.12020.022*
H19B−0.4286−0.20391.20450.022*
C20−0.55683 (17)−0.25000 (16)1.04598 (13)0.0252 (3)
H20A−0.6542−0.21761.06520.038*
H20B−0.5615−0.33911.05440.038*
H20C−0.5440−0.23340.96800.038*
O1W0.64543 (12)0.15365 (9)0.57170 (9)0.01893 (19)
O2W0.60246 (12)0.01353 (10)0.36855 (10)0.01989 (19)
H1N30.205 (2)0.0710 (17)0.6120 (15)0.018 (4)*
H1O2−0.209 (3)0.069 (3)0.737 (2)0.058 (8)*
H1W10.587 (3)0.215 (2)0.582 (2)0.041 (6)*
H2W10.742 (3)0.181 (2)0.5720 (18)0.031 (5)*
H1W20.518 (3)−0.026 (2)0.369 (2)0.041 (6)*
H2W20.608 (2)0.060 (2)0.4315 (18)0.026 (5)*
U11U22U33U12U13U23
Br10.01455 (7)0.02522 (8)0.02311 (8)0.00475 (5)−0.00432 (5)−0.00016 (5)
O10.0123 (4)0.0243 (5)0.0255 (5)0.0016 (3)0.0027 (4)0.0083 (4)
O20.0220 (5)0.0254 (5)0.0236 (5)0.0075 (4)0.0069 (4)0.0106 (4)
N10.0117 (4)0.0156 (5)0.0132 (5)0.0004 (4)0.0019 (4)0.0016 (4)
N20.0121 (4)0.0152 (5)0.0133 (5)0.0009 (3)0.0018 (4)0.0027 (4)
N30.0107 (4)0.0166 (5)0.0165 (5)−0.0009 (4)0.0041 (4)0.0021 (4)
N40.0126 (4)0.0178 (5)0.0147 (5)−0.0017 (4)0.0037 (4)0.0009 (4)
N50.0165 (5)0.0194 (5)0.0136 (5)0.0012 (4)0.0030 (4)0.0031 (4)
C10.0115 (5)0.0154 (5)0.0115 (5)0.0013 (4)0.0022 (4)0.0031 (4)
C20.0130 (5)0.0177 (6)0.0131 (5)0.0007 (4)0.0007 (4)0.0020 (4)
C30.0179 (6)0.0194 (6)0.0138 (5)−0.0021 (4)0.0005 (4)0.0001 (4)
C40.0229 (6)0.0151 (5)0.0167 (6)0.0017 (4)0.0036 (5)0.0013 (4)
C50.0199 (6)0.0156 (6)0.0178 (6)0.0040 (4)0.0036 (5)0.0036 (4)
C60.0109 (5)0.0197 (6)0.0148 (5)0.0000 (4)−0.0001 (4)0.0026 (4)
C70.0118 (5)0.0171 (5)0.0115 (5)−0.0009 (4)0.0030 (4)0.0024 (4)
C80.0136 (5)0.0188 (6)0.0140 (5)−0.0030 (4)0.0039 (4)0.0004 (4)
C90.0122 (5)0.0160 (5)0.0141 (5)−0.0030 (4)0.0017 (4)0.0001 (4)
C100.0129 (5)0.0173 (6)0.0169 (6)−0.0007 (4)0.0024 (4)0.0003 (4)
C110.0131 (5)0.0164 (5)0.0139 (5)−0.0013 (4)0.0010 (4)0.0009 (4)
C120.0132 (5)0.0200 (6)0.0193 (6)0.0014 (4)0.0017 (4)0.0029 (5)
C130.0154 (5)0.0187 (6)0.0176 (6)0.0012 (4)0.0004 (4)0.0041 (4)
C140.0155 (5)0.0152 (5)0.0113 (5)−0.0022 (4)−0.0003 (4)−0.0002 (4)
C150.0145 (5)0.0173 (6)0.0152 (6)0.0010 (4)0.0023 (4)0.0007 (4)
C160.0144 (5)0.0150 (5)0.0144 (5)−0.0004 (4)0.0008 (4)0.0007 (4)
C170.0227 (6)0.0207 (6)0.0158 (6)0.0017 (5)0.0024 (5)0.0040 (5)
C180.0312 (8)0.0201 (7)0.0288 (8)0.0007 (5)0.0058 (6)0.0029 (5)
C190.0193 (6)0.0230 (6)0.0145 (6)0.0023 (5)0.0055 (5)0.0016 (5)
C200.0177 (6)0.0342 (8)0.0235 (7)−0.0006 (5)0.0040 (5)−0.0005 (6)
O1W0.0137 (4)0.0173 (4)0.0263 (5)0.0007 (3)0.0043 (4)0.0026 (4)
O2W0.0150 (4)0.0182 (4)0.0270 (5)0.0005 (3)0.0057 (4)0.0000 (4)
Br1—C21.8809 (13)C8—H8B0.9700
O1—C91.2354 (16)C10—C111.4444 (17)
O2—C161.3534 (16)C10—H10A0.9300
O2—H1O20.87 (3)C11—C121.4007 (18)
N1—C11.3350 (16)C11—C161.4134 (17)
N1—C71.3804 (16)C12—C131.3804 (18)
N2—C51.3802 (16)C12—H12A0.9300
N2—C61.3837 (16)C13—C141.4232 (18)
N2—C11.3887 (15)C13—H13A0.9300
N3—C91.3443 (17)C14—C151.4108 (17)
N3—N41.3906 (14)C15—C161.3856 (18)
N3—H1N30.896 (19)C15—H15A0.9300
N4—C101.2915 (17)C17—C181.526 (2)
N5—C141.3690 (16)C17—H17A0.9700
N5—C171.4594 (17)C17—H17B0.9700
N5—C191.4642 (17)C18—H18A0.9600
C1—C21.4170 (17)C18—H18B0.9600
C2—C31.3662 (18)C18—H18C0.9600
C3—C41.4216 (19)C19—C201.528 (2)
C3—H3A0.9300C19—H19A0.9700
C4—C51.3548 (19)C19—H19B0.9700
C4—H4A0.9300C20—H20A0.9600
C5—H5A0.9300C20—H20B0.9600
C6—C71.3701 (17)C20—H20C0.9600
C6—H6A0.9300O1W—H1W10.86 (3)
C7—C81.5057 (17)O1W—H2W10.84 (2)
C8—C91.5242 (17)O2W—H1W20.80 (3)
C8—H8A0.9700O2W—H2W20.86 (2)
C16—O2—H1O2111.7 (18)C12—C11—C16116.99 (11)
C1—N1—C7105.16 (10)C12—C11—C10119.37 (11)
C5—N2—C6130.13 (11)C16—C11—C10123.53 (12)
C5—N2—C1123.09 (11)C13—C12—C11122.76 (12)
C6—N2—C1106.77 (10)C13—C12—H12A118.6
C9—N3—N4120.60 (10)C11—C12—H12A118.6
C9—N3—H1N3121.0 (12)C12—C13—C14120.09 (12)
N4—N3—H1N3118.2 (12)C12—C13—H13A120.0
C10—N4—N3113.55 (10)C14—C13—H13A120.0
C14—N5—C17120.87 (11)N5—C14—C15121.23 (11)
C14—N5—C19121.09 (11)N5—C14—C13121.24 (12)
C17—N5—C19117.68 (11)C15—C14—C13117.54 (11)
N1—C1—N2111.09 (10)C16—C15—C14121.34 (12)
N1—C1—C2131.60 (11)C16—C15—H15A119.3
N2—C1—C2117.31 (11)C14—C15—H15A119.3
C3—C2—C1120.47 (12)O2—C16—C15116.85 (11)
C3—C2—Br1121.18 (10)O2—C16—C11121.89 (12)
C1—C2—Br1118.31 (9)C15—C16—C11121.25 (12)
C2—C3—C4119.53 (12)N5—C17—C18114.42 (12)
C2—C3—H3A120.2N5—C17—H17A108.7
C4—C3—H3A120.2C18—C17—H17A108.7
C5—C4—C3121.06 (12)N5—C17—H17B108.7
C5—C4—H4A119.5C18—C17—H17B108.7
C3—C4—H4A119.5H17A—C17—H17B107.6
C4—C5—N2118.52 (12)C17—C18—H18A109.5
C4—C5—H5A120.7C17—C18—H18B109.5
N2—C5—H5A120.7H18A—C18—H18B109.5
C7—C6—N2105.77 (11)C17—C18—H18C109.5
C7—C6—H6A127.1H18A—C18—H18C109.5
N2—C6—H6A127.1H18B—C18—H18C109.5
C6—C7—N1111.22 (11)N5—C19—C20113.89 (11)
C6—C7—C8127.58 (11)N5—C19—H19A108.8
N1—C7—C8121.11 (11)C20—C19—H19A108.8
C7—C8—C9109.35 (10)N5—C19—H19B108.8
C7—C8—H8A109.8C20—C19—H19B108.8
C9—C8—H8A109.8H19A—C19—H19B107.7
C7—C8—H8B109.8C19—C20—H20A109.5
C9—C8—H8B109.8C19—C20—H20B109.5
H8A—C8—H8B108.3H20A—C20—H20B109.5
O1—C9—N3124.94 (11)C19—C20—H20C109.5
O1—C9—C8120.90 (12)H20A—C20—H20C109.5
N3—C9—C8114.12 (11)H20B—C20—H20C109.5
N4—C10—C11123.10 (12)H1W1—O1W—H2W1110 (2)
N4—C10—H10A118.5H1W2—O2W—H2W2101 (2)
C11—C10—H10A118.5
C9—N3—N4—C10−178.57 (11)C7—C8—C9—O181.70 (15)
C7—N1—C1—N20.28 (13)C7—C8—C9—N3−95.99 (13)
C7—N1—C1—C2−179.63 (13)N3—N4—C10—C11175.89 (11)
C5—N2—C1—N1−179.26 (11)N4—C10—C11—C12179.87 (12)
C6—N2—C1—N1−0.44 (13)N4—C10—C11—C16−4.1 (2)
C5—N2—C1—C20.66 (17)C16—C11—C12—C13−0.39 (19)
C6—N2—C1—C2179.48 (11)C10—C11—C12—C13175.88 (12)
N1—C1—C2—C3−179.62 (13)C11—C12—C13—C14−1.3 (2)
N2—C1—C2—C30.47 (18)C17—N5—C14—C15176.84 (12)
N1—C1—C2—Br12.65 (19)C19—N5—C14—C153.84 (18)
N2—C1—C2—Br1−177.26 (8)C17—N5—C14—C13−3.34 (18)
C1—C2—C3—C4−1.02 (19)C19—N5—C14—C13−176.34 (12)
Br1—C2—C3—C4176.64 (10)C12—C13—C14—N5−177.55 (12)
C2—C3—C4—C50.5 (2)C12—C13—C14—C152.28 (19)
C3—C4—C5—N20.6 (2)N5—C14—C15—C16178.18 (12)
C6—N2—C5—C4−179.72 (12)C13—C14—C15—C16−1.64 (18)
C1—N2—C5—C4−1.20 (19)C14—C15—C16—O2179.42 (11)
C5—N2—C6—C7179.12 (12)C14—C15—C16—C11−0.03 (19)
C1—N2—C6—C70.41 (13)C12—C11—C16—O2−178.35 (12)
N2—C6—C7—N1−0.25 (14)C10—C11—C16—O25.54 (19)
N2—C6—C7—C8176.21 (11)C12—C11—C16—C151.06 (18)
C1—N1—C7—C6−0.01 (14)C10—C11—C16—C15−175.04 (12)
C1—N1—C7—C8−176.73 (11)C14—N5—C17—C18−78.07 (16)
C6—C7—C8—C9−68.28 (16)C19—N5—C17—C1895.16 (14)
N1—C7—C8—C9107.87 (13)C14—N5—C19—C2077.22 (16)
N4—N3—C9—O1−3.51 (19)C17—N5—C19—C20−96.00 (14)
N4—N3—C9—C8174.06 (10)
D—H···AD—HH···AD···AD—H···A
N3—H1N3···O2Wi0.894 (17)1.908 (17)2.7956 (15)171.7 (17)
O2—H1O2···O1Wii0.87 (3)2.42 (3)2.9423 (15)119 (2)
O2—H1O2···N40.87 (3)1.99 (3)2.7181 (16)142 (2)
O1W—H1W1···N10.86 (2)1.98 (2)2.8315 (14)176 (2)
O1W—H2W1···O1iii0.85 (3)1.92 (2)2.7361 (14)162 (2)
O2W—H1W2···O1Wi0.80 (2)2.08 (2)2.8311 (15)157 (2)
O2W—H2W2···O1W0.86 (2)1.87 (2)2.7245 (15)172.9 (17)
C5—H5A···O1iv0.932.503.3121 (17)146
C10—H10A···O2Wi0.932.543.3256 (17)142
C17—H17B···Br1v0.972.853.6569 (15)142
C3—H3A···Cg3vi0.932.613.4734 (15)154
C17—H17A···Cg1vii0.972.703.5863 (15)152
Table 1

Hydrogen-bond geometry (Å, °)

Cg1 is the centroid of the N1/C1/N2/C6/C7 ring and Cg3 is the centroid of the C11–C16 ring.

D—H⋯AD—HH⋯ADAD—H⋯A
N3—H1N3⋯O2Wi0.894 (17)1.908 (17)2.7956 (15)171.7 (17)
O2—H1O2⋯O1Wii0.87 (3)2.42 (3)2.9423 (15)119 (2)
O2—H1O2⋯N40.87 (3)1.99 (3)2.7181 (16)142 (2)
O1W—H1W1⋯N10.86 (2)1.98 (2)2.8315 (14)176 (2)
O1W—H2W1⋯O1iii0.85 (3)1.92 (2)2.7361 (14)162 (2)
O2W—H1W2⋯O1Wi0.80 (2)2.08 (2)2.8311 (15)157 (2)
O2W—H2W2⋯O1W0.86 (2)1.87 (2)2.7245 (15)172.9 (17)
C5—H5A⋯O1iv0.932.503.3121 (17)146
C10—H10A⋯O2Wi0.932.543.3256 (17)142
C17—H17B⋯Br1v0.972.853.6569 (15)142
C3—H3ACg3vi0.932.613.4734 (15)154
C17—H17ACg1vii0.972.703.5863 (15)152

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) ; (v) ; (vi) ; (vii) .

  9 in total

1.  Short synthesis and anti-rhinoviral activity of imidazo[1,2-a]pyridines: the effect of acyl groups at 3-position.

Authors:  C Hamdouchi; J Ezquerra; J A Vega; J J Vaquero; J Alvarez-Builla; B A Heinz
Journal:  Bioorg Med Chem Lett       Date:  1999-05-17       Impact factor: 2.823

2.  Imidazo[1,2-a]pyridines with potent activity against herpesviruses.

Authors:  Kristjan S Gudmundsson; Brian A Johns
Journal:  Bioorg Med Chem Lett       Date:  2007-03-03       Impact factor: 2.823

3.  Synthesis and SAR studies of very potent imidazopyridine antiprotozoal agents.

Authors:  Tesfaye Biftu; Dennis Feng; Michael Fisher; Gui-Bai Liang; Xiaoxia Qian; Andrew Scribner; Richard Dennis; Shuliang Lee; Paul A Liberator; Chris Brown; Anne Gurnett; Penny S Leavitt; Donald Thompson; John Mathew; Andrew Misura; Samantha Samaras; Tamas Tamas; Joseph F Sina; Kathleen A McNulty; Crystal G McKnight; Dennis M Schmatz; Matthew Wyvratt
Journal:  Bioorg Med Chem Lett       Date:  2006-02-07       Impact factor: 2.823

4.  A short history of SHELX.

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

5.  Imidazo(1,2-a)pyridine anthelmintic and antifungal agents.

Authors:  M H Fisher; A Lusi
Journal:  J Med Chem       Date:  1972-09       Impact factor: 7.446

6.  Synthesis and SAR studies of potent imidazopyridine anticoccidial agents.

Authors:  Gui-Bai Liang; Xiaoxia Qian; Dennis Feng; Michael Fisher; Christine M Brown; Anne Gurnett; Penny Sue Leavitt; Paul A Liberator; Andrew S Misura; Tamas Tamas; Dennis M Schmatz; Matthew Wyvratt; Tesfaye Biftu
Journal:  Bioorg Med Chem Lett       Date:  2007-04-24       Impact factor: 2.823

Review 7.  Biological activities of hydrazone derivatives.

Authors:  Sevim Rollas; S Güniz Küçükgüzel
Journal:  Molecules       Date:  2007-08-17       Impact factor: 4.411

8.  Substituted imidazo[2,3-alpha]pyridine-2-carbamate anthelmintics.

Authors:  R J Bochis; L E Olen; F S Waksmunski; H Mrozik; P Eskola; P Kulsa; G Wilks; J E Taylor; J R Egerton; D A Ostlind; G Olson
Journal:  J Med Chem       Date:  1981-12       Impact factor: 7.446

9.  Structure validation in chemical crystallography.

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

北京卡尤迪生物科技股份有限公司 © 2022-2023.