A new transition-metal-free 9-azabicyclo[3.3.1]nonan-N-oxyl (ABNO) catalyzed aerobic oxidative synthesis of 2-substituted 4H-3,1-benzoxazines and quinazolines has been developed through cascade reaction of aldehydes with 2-aminobenzyl alcohols and 2-aminobenzylamines, respectively. Under the optimal reaction conditions, the two kinds of heterocycles were obtained in 72–97 % isolated yield.
通过醛与2-取代4H-3,1-苯并恶嗪和
喹唑啉的级联反应,开发了一种新的无过渡
金属
9-氮杂双环[3.3.1]壬烷-N-氧基(ABNO)催化有氧氧化合成2-取代4H-3,1-苯并恶嗪和
喹唑啉-
氨基
苄醇和
2-氨基苄胺,分别。在最佳反应条件下,两种
杂环化合物的分离产率为72-97%。