ortho-formyl diarylmethanes. This reaction is also the first example of electrophilic, aromatic cyclisation assisted by ultrasounds which leads to pure polycyclic, fused aromatic hydrocarbons containing 3 and 4 fused rings in excellent yields. The reaction proceeds not only in aqueous but also in non-aqueous media at milder conditions (room temperature) and in much shorter reaction times than in conventional
本工作描述了超声波在活化和未活化的邻甲酰基二芳基
甲烷的Bradsher环化反应中的首次使用。该反应也是超声辅助的亲电,芳族环化的第一个例子,它可以以极好的收率得到纯的含3和4个稠环的多环稠合
芳烃。与常规方案相比,该反应不仅在温和的条件(室温)下在
水性介质中而且还在非
水性介质中进行,并且反应时间短得多。