Synthesis of Fluorenones from Aromatic Aldoxime Ethers and Aryl Halides by Palladium-Catalyzed Dual CH Activation and Heck Cyclization
作者:Vedhagiri S. Thirunavukkarasu、Kanniyappan Parthasarathy、Chien-Hong Cheng
DOI:10.1002/anie.200804153
日期:2008.11.24
Catalytic Oxidative Cyclization of 2′-Arylbenzaldehyde Oxime Ethers under Photoinduced Electron Transfer Conditions
作者:Julie L. Hofstra、Brittany R. Grassbaugh、Quan M. Tran、Nicholas R. Armada、H. J. Peter de Lijser
DOI:10.1021/jo502324z
日期:2015.1.2
sequence is initiated by an electron transfer step followed by nucleophilicattack of the aryl ring onto the nitrogen of the oxime ether. A concave downward Hammett plot is presumably the result of a change in charge distribution in the radical cation species with strongly electron-donating substituents that yields a less electrophilic nitrogenatom and a decreased amount of cyclized product. The reaction