Study of Aromatic Nucleophilic Substitution with Amines on Nitrothiophenes in Room-Temperature Ionic Liquids: Are the Different Effects on the Behavior of para-Like and ortho-Like Isomers on Going from Conventional Solvents to Room-Temperature Ionic Liquids Related to Solvation Effects?
作者:Francesca D'Anna、Vincenzo Frenna、Renato Noto、Vitalba Pace、Domenico Spinelli
DOI:10.1021/jo060435q
日期:2006.7.1
information concerning reagent−solvent interactions, the reaction was carried out over the temperature range 293−313 K. The reaction occurs faster in ionic liquids than in conventional solvents (methanol, benzene), a dependence of rate constants on amine concentration similar to that observed in methanol, suggesting a parallel behavior. The above reaction also was studied with 2-bromo-3-nitrothiophene, an
一些亲核芳香取代的动力学2-升-5- nitrothiophenes(对-等异构体)具有三个不同的胺(吡咯烷,哌啶和吗啉)在三个室温离子液体进行了研究([BMIM] [BF 4 ],[bmim] [PF 6 ]和[bm 2 im] [BF 4 ],其中bmim = 1-丁基-3-甲基咪唑鎓和bm 2im = 1-丁基-2,3-二甲基咪唑鎓)。为了计算热力学参数,该热力学参数是获取有关试剂-溶剂相互作用信息的有用工具,反应在293-313 K的温度范围内进行。离子液体中的反应比常规溶剂(甲醇,苯)中的反应更快速率常数对胺浓度的影响与在甲醇中观察到的相似,表明存在平行行为。上述反应也用2-溴-3-硝基噻吩,邻研究-像衍生物能够给在过渡状态特有的分子内相互作用,这是强烈影响反应介质中。