Synthesis of Benzoacridines and Benzophenanthridines by Regioselective Pd-Catalyzed Cross-Coupling Reactions Followed by Acid-Mediated Cycloisomerizations
Various benzoacridines and benzophenanthridines have been synthesized by Brønsted acid mediated cycloisomerisation as the key step. The optical and electrochemical properties have been studied by UV/Vis and emission spectroscopy as well as CV measurements. Obtained results have been verified by DFT calculations.
TMEDA-Assisted Effective Direct Ortho Arylation of Electron-Deficient <i>N</i>-Heteroarenes with Aromatic Grignard Reagents
作者:Fang-Fang Zhuo、Wen-Wen Xie、Yong-Xin Yang、Lei Zhang、Pei Wang、Rui Yuan、Chao-Shan Da
DOI:10.1021/jo400152f
日期:2013.4.5
the addition of TMEDA in toluene, aryl Grignards could effectively and site-specifically ortho-arylate electron-deficient heteroarenes under mild conditions. This endeavor successfully changed the old low-yielding reaction, aryl Grignard addition to N-heteroarenes, into an efficient procedure for heterobiaryls. The combination of the inexpensive aryl Grignards, TMEDA, the cost-free air, no use of any