Intramolecular direct arylation in the synthesis of fluorinated carbazoles
作者:Robin B. Bedford、Michael Betham、Jonathan P.H. Charmant、Amanda L. Weeks
DOI:10.1016/j.tet.2008.01.143
日期:2008.6
The amination of 2-chloroanilines with aryl bromides and subsequent intramolecular direct arylation can be exploited in the synthesis of a range of fluorinated carbazoles, where the fluorine substituent can be introduced via the aniline, the aryl bromide or both substrates. Depending on substitution patterns, the two steps can either be performed in tandem in one-pot under microwave heating conditions
Rapid Synthesis of Fused N-Heterocycles by Transition-Metal-Free Electrophilic Amination of Arene CH Bonds
作者:Hongyin Gao、Qing-Long Xu、Muhammed Yousufuddin、Daniel H. Ess、László Kürti
DOI:10.1002/anie.201309973
日期:2014.3.3
disclose an efficient and operationally simple protocol for the preparation of fused N‐heterocycles starting from readily available 2‐nitrobiaryls and PhMgBr under mild conditions. More than two dozen N‐heterocycles, including two bioactive natural products, have been synthesized using this method. A stepwise electrophilic aromatic cyclization mechanism was proposed by DFT calculations.