Iron-Catalyzed Radical Methylation of Activated Alkenes with tert-Butanol as the Methyl Source
作者:Zhengbao Xu、Rui Jia、Zhiwei Ma、Shouhao Cao、Liang Shen、Hongfang Ji
DOI:10.1055/s-0039-1690193
日期:2019.10
A free-radical-initiated methylation/addition/cyclization of N-arylacrylamides and a methylation/addition/elimination of quinines have been developed in which t-BuOH is used as a methylsource. These reactions provide effective and selective methods for the synthesis of various methylated oxindoles and quinones in moderate to good yields.
Kinetic Isotope Effects for Electron-Transfer Pathways in the Oxidative C−H Activation of Hydrocarbons
作者:T. M. Bockman、S. M. Hubig、J. K. Kochi
DOI:10.1021/ja974205s
日期:1998.4.1
Fast hydrogen atom transfersfrom various methylbenzenes (ArH) to photoactivated quinones Q* show primary kinetic isotope effects k(H)/k(D) of 2.4−5.6. The quantitative effects of added inert salt on the kinetics and on the yields of the intermediate cation radical ArH+• demonstrate that hydrogentransfer proceeds via a two-step sequence involving an initial electron transfer to form the ion-radical