Syntheses and Structures of Substituted [4-(2,2,2-Trifluoroethoxy)-2-Pyridinyl]-Methylthio-Imidazoles and -Pyrimidines
作者:Sen Ma、Ai-Quan Jia、Fang-Fang Fan、Hua-Tian Shi、Qian-Feng Zhang
DOI:10.1007/s10870-016-0637-z
日期:2016.3
Reactions of substituted 2-(chloromethyl)-pyridine (1a–1b) and substituted imidazole-2-thione (2a–2c) in the presence of sodium methoxide afforded a series of substituted [4-(2,2,2-trifluoroethoxy)-2-pyridinyl]-methylthio-imidazoles (3a–3f) in good yields. Similar reactions of compounds 1a–1b with different pyrimidine-2-thiol (4a–4b) led to the corresponding [4-(2,2,2-trifluoroethoxy)-2-pyridinyl]-methylthio-pyrimidine (5a–5d, av. 90 %) derivatives. Molecular structures of compounds 3a and 5b were confirmed by single-crystal X-ray diffraction analyses. The unit cells of both compounds have monoclinic P21/c symmetry with the cell parameters a = 7.786(7), b = 21.910(19), c = 8.675(8) Å, β = 91.113(13)°, and V = 1480(2) Å3 for 3a and a = 9.1683(13), b = 14.0946(19), c = 12.5409(18) Å, β = 93.686(2)°, and V = 1617.2(4) Å3 for 5b. A series of substituted [4-(2,2,2-trifluoroethoxy)-2-pyridinyl]-methylthio-imidazoles and -pyrimidines were synthesized and characterized, of which structures of 3-methyl-[4-(2,2,2-trifluoroethoxy)-2-pyridinyl]-methylthio-1-methyl-imidazole and 3-methyl-[4-(2,2,2-trifluoroethoxy)-2-pyridinyl]-methylthio-4,6-dimethyl-pyrimidine were confirmed by X-ray crystallography.
在甲醇钠存在下,取代的 2-(氯甲基)-吡啶 (1a-1b) 和取代的咪唑-2-硫酮 (2a-2c) 发生反应,得到一系列取代的 [4-(2,2,2-三氟乙氧基)-2-吡啶基]-甲硫基咪唑 (3a-3f),产率良好。化合物 1a-1b 与不同的嘧啶-2-硫醇(4a-4b)发生类似反应,得到相应的[4-(2,2,2-三氟乙氧基)-2-吡啶基]-甲硫基嘧啶(5a-5d,平均 90%)衍生物。单晶 X 射线衍射分析证实了化合物 3a 和 5b 的分子结构。两种化合物的单位晶胞均为单斜 P21/c 对称,晶胞参数为 a = 7.786(7), b = 21.910(19), c = 8.675(8) Å, β = 91.113(13)°,以及 3a 的 V = 1480(2) Å3 和 a = 9.1683(13), b = 14.0946(19),c = 12.5409(18) Å,β = 93.686(2)°,以及 V = 1617.2(4) Å3 为 5b。合成并表征了一系列取代的[4-(2,2,2-三氟乙氧基)-2-吡啶基]甲硫基咪唑和嘧啶,其中 3-甲基-[4-(2,2、X-射线晶体学证实了 3-甲基-[4-(2,2,2-三氟乙氧基)-2-吡啶基]-甲硫基-1-甲基-咪唑和 3-甲基-[4-(2,2,2-三氟乙氧基)-2-吡啶基]-甲硫基-4,6-二甲基嘧啶的结构。