the presence of m-chloroperoxybenzoic acid to give substituted arenes as cycloadducts. Alternatively, thiophene S-oxides have been prepared by oxidation from thiophenes and have been subjected to cycloaddition with alkynes in a subsequent step. The outcome of the reaction is dependent on the steric demand of the thiophene S-oxide. Some thiophene S-oxides can be reacted at temperatures as high as 140°C
噻吩已经与在存在炔处理米
氯过氧酸,得到取代的
芳烃如cycloadducts。另外,
噻吩S-氧化物是通过从
噻吩氧化制得的,并在随后的步骤中与
炔烃进行环加成反应。反应的结果取决于
噻吩S-氧化物的空间需求。某些
噻吩S-氧化物可以在高达140 °C的温度下反应而不会分解。
噻吩作为脱氧产物是主要的副产物。
噻吩S-氧化物与
丙二烯的反应部分产生12a型噻双环[2.2.1]庚烯S-氧化物和13以及加香的产品。
噻吩S-氧化物也环加成苯并。