Copper-Catalyzed Intramolecular Oxidative CH Functionalization and CN Formation of 2-Aminobenzophenones: Unusual Pseudo-1,2-Shift of the Substituent on the Aryl Ring
A good move: A copper‐catalyzed intramolecular oxidative CH functionalization of 2‐aminobenzophenone affords two regioisomeric acridones (see scheme). The reaction involves an unusual pseudo‐1,2‐migration of R2 group(s) on the arene ring (bpy=2,2′‐bipyridine, DMAc=dimethylacetimide).
Copper-catalyzed intramolecular direct amination of sp2 C–H bonds for the synthesis of N-aryl acridones
作者:Wang Zhou、Yong Liu、Youqing Yang、Guo-Jun Deng
DOI:10.1039/c2cc35425j
日期:——
A copper-catalyzed approach for the synthesis of N-arylacridones via sp(2) C-H bond amination using air as oxidant under neutral conditions is disclosed. This reaction not only provides a complementary method for synthesizing medicinally important acridones, but also offers a new strategy for sp(2) C-H bond amination.
Rapid construction of acridines via BF3•Et2O promoted cyclization of 2-phenylamino benzophenones
作者:Liuyang Deng、Ranran Guo、Lianjie Wang、Cao Yang、Zechao Wang
DOI:10.1016/j.tetlet.2022.154044
日期:2022.8
benzophenone promoted by BF3•Et2O has been developed. The reaction goes through the intramolecular Friedel–Crafts acylation and dehydration with a facile work-up procedure. It shows good functional group tolerance and the yields of acridines are mostly in range of 90–99 %. The efficiency of this reaction is tremendously high, which can be completed within 30 min. Gram-scale synthesis and synthetic