A general procedure for the synthesis of methylthio-, methylseleno- and methyltelluro-substituted aromatic compounds
作者:Lars Engman、Jonas S.E. Hellberg
DOI:10.1016/0022-328x(85)80366-1
日期:1985.12
A one-pot procedure is described which allows the facile introduction of one or two methylchalcogeno groups into a variety of monobromo or dibromo aromatics. The bromo compounds were converted to their corresponding lithio derivatives by treatment with t-butyllithium in tetrahydrofuran at −78°C, and these derivatives were then treated, at ambient temperature with elemental sulfur, selenium, or tellurium
描述了一种一锅法,其允许容易地将一个或两个甲基硫属元素基引入各种单溴或二溴芳族化合物中。通过在-78℃下在四氢呋喃中用叔丁基锂处理,将溴代化合物转化为其相应的硫代衍生物,然后在环境温度下用元素硫,硒或碲处理这些衍生物。最后,将所得的硫醇锂,硒酸锂和碲酸锂用甲基碘甲基化,以得到各种甲基硫属元素取代的芳族化合物的良好收率(通常为50-80%)。该方法不能用于合成邻二取代化合物或同时引入三个甲基硫属元素基。