Study of synthesis of 2-(2-alkoxyphenyl)-1<i>H</i>-imidazoles. Comparison of oxidative aromatization reactions of imidazolines
作者:Patrik Pařík、Sylva Šenauerová、Vlasta Lišková、Karel Handlíř、Miroslav Ludwig
DOI:10.1002/jhet.5570430404
日期:2006.7
(several-day refluxing), oxidation with activated manganese dioxide in toluene (several-hour heating at 60 °C), and the oxidation with potassium nitrosodisulfonate (Fremy's salt) at room temperature. Seven new 2-(2-alkoxyphenyl)-1H-imidazoles were synthesized (alkyl = ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, benzyl) via mentioned methods. Comparison of individual oxidative aromatization reactions
水杨酸甲酯与乙烷-1,2-二胺的反应已用于制备2-(2-羟苯基)-1 H-咪唑啉。该化合物用卤代烷烷基化,得到五个新的2-(2-烷氧基苯基)-1 H-咪唑啉(烷基=丙基,异丙基,异丁基,仲丁基,苄基)。测试了咪唑啉向相应的咪唑的七种转化反应。其中成功的是在甲苯中的钯上脱氢(数天回流),在甲苯中的活化二氧化锰氧化(在60°C下加热数小时)以及在室温下用亚硝基二磺酸钾(弗雷米盐)氧化。七个新的2-(2-烷氧基苯基)-1 H通过上述方法合成了咪唑(烷基=乙基,丙基,异丙基,丁基,异丁基,仲丁基,苄基)。从实验安排,反应时间和条件,所得产物的纯度和产率的角度讨论了各个氧化芳构化反应的比较。