通过邻-(甲氧基羰基)苯重氮盐,腈和2-氰基苯胺的直接反应以中等至良好的产率实现了喹唑啉代[3,4- a ]喹唑啉-13-酮的一锅合成。该方法利用了原位生成的反应性N-芳基腈离子,该离子经过进一步的胺化/串联环化/酰胺化反应,以提供所需的多环骨架,并连续形成四个N-C键。替代模式的灵活性,温和的反应条件和操作简便性是该方法的主要特点。
A palladium‐catalyzed tandem reaction of 2‐(quinazolinone‐3(4H)‐yl)benzonitriles with arylboronic acids has been developed, allowing access to a new class of 2‐(4‐arylquinazolin‐2‐yl)anilines that were often difficult to prepare using previous methods. In particular, the newly produced amino group is amenable to further synthetic elaborations, thereby broadening the diversity of the products. The structure
The reaction of 3-(2-cyanophenyl)quinazolin-4(3H)-one with various primary alkylamines gave 3-alkylquinazolin-4(3H)-ones via an addition of the nucleophile, ring opening, and ring closure (ANRORC) mechanism. This type of reaction required hydroxy group functionality in either the solvent or reagent. When hydroxylamine was used as nitrogen nucleophile, the intermediate of this reaction was isolated