Synthesis and Crystal Structure of New Thiazolyl-Pyrazoline Derivatives Bearing 1,2,4-Triazole Moiety
作者:Yong-Ming Zeng、Sheng-Qin Chen、Fang-Ming Liu
DOI:10.1007/s10870-011-0198-0
日期:2012.1
The title compounds 1-(4-aryl-5-triazolyl-2-thiazolyl)-3,5-diaryl-2-pyrazoline derivatives (3a–c) were synthesized by reacting 3,5-diaryl1-thiocarbamoyl -2-pyrazoline 1 with 2-bromo-1-aryl-2-(1H-1,2,4-triazol-1-yl) ethanones 2 in boiling ethanol. Their structures were characterized by IR, 1H-NMR, MS spectroscopic data and elementary analyses. The structure of compound (3a), C26H18Cl2N6S, was conclusively established with X-ray crystal structure analysis. It crystallizes in the Orthorhombic space group Pna2(1), with a = 17.8160(5), b = 18.9125(7), c = 14.7926(4), α = 90°, β = 90°, γ = 90°and Dc = 1.379 mg/m3 for Z = 8, V = 4984.3(3) Å, μ(Mo–Kα) = 0.372 mm, λ = 0.71070 Å, the final R = 0.0527 and wR = 0.1307 for 43309 observed reflections with I > 2σ(I). The structure is stabilized by weak C–H···N intramolecular hydrogen bonds and C–H···Cg p-ring intermolecular interactions and gives support to molecular packing stability in the unit cell. The title compounds 1-(4-aryl-5-triazolyl-2-thiazolyl)-3,5-diaryl-2–pyrazoline derivatives (3a-c) were synthesized by reacting 3,5-diaryl1-thiocarbamoyl-2- pyrazoline 1 with 2-bromo-1-aryl-2-(1H-1,2,4-triazol-1-yl) ethanones 2. Their structures were characterized by IR, 1H-NMR, MS spectroscopic data and elementary analyses. The structure of compound (3a) was conclusively established with X-ray crystal structure analysis.
标题化合物 1-(4-芳基-5-三唑基-2-噻唑基)-3,5-二芳基-2-吡唑啉衍生物 (3a-c) 是由 3,5- 二芳基-1-硫代氨基甲酰基-2-吡唑啉 1 与 2-溴-1-芳基-2-(1H-1,2,4-三唑-1-基) 乙酮 2 在沸腾的乙醇中反应合成的。通过红外光谱、1H-NMR、MS 光谱数据和基本分析对它们的结构进行了表征。化合物 (3a) C26H18Cl2N6S 的结构是通过 X 射线晶体结构分析确定的。它结晶于正交空间群 Pna2(1),a = 17.8160(5), b = 18.9125(7), c = 14.7926(4), α = 90°, β = 90°, γ = 90°and Dc = 1.379 mg/m3 for Z = 8, V = 4984.3(3) Å, μ(Mo-Kα) = 0.372 mm, λ = 0.71070 Å, 最终 R = 0.0527 and wR = 0.1307 for 43309 observed reflections with I > 2σ(I).该结构通过微弱的 C-H-N 分子内氢键和 C-H-Cg p-ring 分子间相互作用而稳定,并支持单元胞中的分子堆积稳定性。标题化合物 1-(4-芳基-5-三唑基-2-噻唑基)-3,5-二芳基-2-吡唑啉衍生物(3a-c)是由 3,5-二芳基-1-硫代氨基甲酰基-2-吡唑啉 1 与 2-溴-1-芳基-2-(1H-1,2,4-三唑-1-基)乙酮 2 反应合成的。通过红外光谱、1H-NMR、MS 光谱数据和基本分析对它们的结构进行了表征。化合物 (3a) 的结构通过 X 射线晶体结构分析得以确定。