Ligand-Free Iron-Catalyzed C–F Amination of Diarylamines: A One-Pot Regioselective Synthesis of Diaryl Dihydrophenazines
作者:Yuma Aoki、Harry M. O’Brien、Hiroto Kawasaki、Hikaru Takaya、Masaharu Nakamura
DOI:10.1021/acs.orglett.8b03702
日期:2019.1.18
A one-pot synthesis of various 5,10-diaryl-5,10-dihydrophenazines (DADHPs) from diarylamines has been achieved by using an iron-catalyzed C–F amination. Homodimerization of magnesium diarylamides, followed by defluorinative intramolecular cyclization (double ortho C–F amination) in the presence of catalytic FeCl2 and stoichiometric 1,2-dibromoethane, affords the corresponding DADHPs with complete regiocontrol
通过使用铁催化的CF胺,可以从二芳基胺一锅合成各种5,10-diaryl-5,10-dihydrophenazines(DADHPs)。在催化FeCl 2和化学计量的1,2-二溴乙烷存在下,二芳基酰胺镁的均二聚化,然后进行脱氟分子内环化(双邻位CF胺化),可提供相应的DADHPs,具有完全的区域控制能力。氟对其他卤素的独特高反应性表明,胺化是通过铁促进的S N Ar机理进行的。