Synthesis, Spectroscopic Characterization and X-ray Structure Analysis of 6-(2,5-Dichlorothiophen-3-yl)-3,4-dihydro-4-(4-methoxyphenyl)pyrimidine-2(1H)-thione
作者:Mahmoud Al-Refai、Armin Geyer、Michael Marsch、Basem F. Ali
DOI:10.1007/s10870-014-0530-6
日期:2014.8
The title compound was prepared by the condensation of (E)-1-(2,5-dichlorothiophen-3-yl)-3-(4-methoxy)prop-2-en-1-one and thiourea in the presence of KOH. In the title compound, C34H28Cl16N4O2S4, the asymmetric unit consists of two independent molecules and four independent chloroform molecules. The heterocyclic pyrimidine-2(1H)-thione rings adopt a flattened boat conformation. The methoxyphenyl rings are perpendicular to the pyrimidine-2(1H)-thione rings with dihedral angles of 81.20 and 79.85° in both independent molecules. The dichlorothiophene rings are twisted compared to the pyrimidine-2(1H)-thione rings with dihedral angles of 40.59 and 39.36° in the independent molecules. The methoxyphenyl group has an axial orientation. Intermolecular C–H···S, C–H···O, C–H··· π vertex-to-face intermolecular interactions between chloroform C–H groups and the center of the phenyl rings and extensive Cl···Cl intermolecular interactions are found in the crystal structure. All interactions consolidate a three dimensional network. The molecular structure was further analyzed using spectroscopic methods. Mass ESI-HMRS measurements were performed. The HRESIMS analysis revealed the molecular formula, C15H12Cl2N2OS2, with [M+H]+ and [M+H+2]+ and [M+H+4]+ isotopic clusters characteristic for a dichlorinated compound. The compound was also thoroughly characterized by 1H, 13C, NMR spectra and 2D NMR spectra (COSY, HSQC and HMBC). Synthesis, characterization, molecular, crystal structure and crystal supramolecularity of the three dimensional network structure of 6-(2,5-dichlorothiophen-3-yl)-3,4-dihydro-4-(4-methoxyphenyl)pyrimidine-2(1H)-thione are reported.
标题化合物是由(E)-1-(2,5-二氯噻吩-3-基)-3-(4-甲氧基)丙-2-烯-1-酮和硫脲在 KOH 存在下缩合而成。在标题化合物 C34H28Cl16N4O2S4 中,不对称单元由两个独立分子和四个独立的氯仿分子组成。杂环嘧啶-2(1H)-硫酮环呈扁舟状构象。甲氧基苯环与嘧啶-2(1H)-硫酮环垂直,在两个独立分子中的二面角分别为 81.20 和 79.85°。与嘧啶-2(1H)-硫酮环相比,二氯噻吩环是扭曲的,在两个独立分子中的二面角分别为 40.59 和 39.36°。甲氧基苯基具有轴向取向。在晶体结构中,氯仿 C-H 基团与苯基环中心之间存在 C-H--S、C-H--O、C-H--π 顶点到面的分子间相互作用,同时还存在广泛的 Cl-Cl 分子间相互作用。所有的相互作用都巩固了一个三维网络。利用光谱方法对分子结构进行了进一步分析。进行了质谱 ESI-HMRS 测量。HRESIMS 分析显示其分子式为 C15H12Cl2N2OS2,具有二氯化合物特有的 [M+H]+ 和 [M+H+2]+ 及 [M+H+4]+ 同位素簇。该化合物还通过 1H、13C、核磁共振谱和二维核磁共振谱(COSY、HSQC 和 HMBC)进行了全面表征。报告了 6-(2,5-二氯噻吩-3-基)-3,4-二氢-4-(4-甲氧基苯基)嘧啶-2(1H)-硫酮三维网络结构的合成、表征、分子结构、晶体结构和晶体超分子性。