摘要 开发了一种用 H 2 O 2以中等至良好产率将硫化物氧化成亚砜和砜的直接选择性方法。反应在室温下在2 mol% VO(acac) 2 的存在下进行。所有亚砜和砜均采用气相色谱法检测,2-甲基苄基4-甲基苯基砜、4-甲基苄基4-甲基苯基砜、2-溴苄基4-甲基苯基砜和4-叔丁基苄基苄基砜的分子结构由下式测定单晶 X 射线晶体学。
In the presence of phosphazene P2-Et base as well as 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) the coupling of aryl iodides with arenethiols only requires catalytic amounts of CuBr. Under these conditions the reaction can be performed in refluxing toluene to give biaryl thioethers in excellent yields.
A novel protocol for the direct arylthiolation of electron-rich arenes is described. Applying arylsulfonyl cyanides in the presence of catalytic amounts of Pd allows for a straightforward synthesis of diaryl sulfides.