Strong as an Ox: 2‐Thiazoles and 2‐oxazoles are formed by oxidation of 2‐thiazolines and 2‐oxazolines without requiring substituents at the C4 and C5 positions. DDQ plays an important role as the oxidant in this transformation and metal is unnecessary. This general procedure shows good functional group tolerance and provides a wide variety of 2‐thiazoles and 2‐oxazoles in moderate to excellent yields
像牛一样强: 2-
噻唑和2-
恶唑是通过2-
噻唑啉和2-
恶唑啉的氧化反应形成的,不需要在C4和C5位置处有取代基。
DDQ在此转化过程中起氧化剂的作用,并且不需要
金属。该通用步骤显示出良好的官能团耐受性,并以中等至极好的收率提供了各种2-
噻唑和2-
恶唑。