一些2-芳基-5-氯-1,3,4-噻二唑(Ⅰ; X = Cl)在不同溶剂中用几种亲核试剂处理。为了在30-60°C的温度范围内在乙醇和苯中进行动力学研究,选择了哌啶取代氯。对于两种试剂,在乙醇中的反应是一阶的,而在苯中则是三阶的。在乙醇中,Ph环上的取代基在50°下的Hammett相对值为1·47,从而影响亲核交换的速率。动力学结果与该类和其他类噻二唑的理论预期值和实验数据进行了比较。
Efficient formation of C–S bond using heterocyclic thiones and arynes
作者:Yu An、Gang Xu、Menglu Cai、Shihui Wang、Xiao zhong Wang、Yingqi Chen、Liyan Dai
DOI:10.1016/j.tet.2020.131829
日期:2021.1
their diverse biological activities and medicinal prospects. Here, a facile method was reported. An arylation of 1,3,4-oxa(thia)diazol-2-thiones reacting with arynes to build C(aryl)-S bonds in the presence of CsF had good yields and excellent selectivity. The reaction was completed in short time without using expensive reagents and catalysts. Present reaction system is an efficient procedure to process
A copper-catalyzed cross-coupling of heterocyclic thiols with aryliodides is reported. The reaction was carried out in the presence of CuI (5 mol %), 1,10-phenanthroline (10 mol %) and K2CO3 (1.3 equiv) in DMF at 120 °C. A variety of heterocyclic sulfides were prepared in high selectivities and yields.
据报道,铜催化的杂环硫醇与芳基碘化物的交叉偶联。反应在120℃下在CuI(5mol%),1,10-菲咯啉(10mol%)和K 2 CO 3(1.3当量)的存在下在DMF中进行。以高选择性和高产率制备了各种杂环硫化物。
Fabrication of magnetic amino-functionalized nanoparticles for S-arylation of heterocyclic thiols
作者:Yanhong Liu、Lincheng Zhou、Xinping Hui、Zhenwen Dong、Hao Zhu、Yanming Shao、Yanfeng Li
DOI:10.1039/c4ra08782h
日期:——
The aminosilane coupling agent and polyethylene imine-600 were loaded onto magnetic nanoparticles to obtain magnetic nanoligands (MNLs) A, B, C and D.
4-thiadiazoles (I; X = Cl) were treated with several nucleophilic agents in different solvents. Displacement of chlorine by piperidine was chosen for a kinetic study in ethanol and in benzene, in the temperature range 30–60°. Reactions were first order with respect to both reagents in ethanol, while a third-order term appeared in benzene. Substituents on the Ph ring affected the rate of nucleophilic exchange
一些2-芳基-5-氯-1,3,4-噻二唑(Ⅰ; X = Cl)在不同溶剂中用几种亲核试剂处理。为了在30-60°C的温度范围内在乙醇和苯中进行动力学研究,选择了哌啶取代氯。对于两种试剂,在乙醇中的反应是一阶的,而在苯中则是三阶的。在乙醇中,Ph环上的取代基在50°下的Hammett相对值为1·47,从而影响亲核交换的速率。动力学结果与该类和其他类噻二唑的理论预期值和实验数据进行了比较。