activation energies of various hydridetransferreactions was developed according to transition state theory using the Morse-type free energy curves of hydride donors to release a hydride anion and hydrideacceptors to capture a hydride anion and by which the activation energies of 187 typical hydride self-exchange reactions and more than thirty thousand hydride cross transferreactions in acetonitrile were
作者:Zhang, Ting、Qian, Lu、Chen, Zhen-Yu、Zou, Yong、Zhang, Xue-Jing、Yan, Ming
DOI:10.3998/ark.5550190.p010.000
日期:——
Conversion and Origin of Normal and Abnormal Temperature Dependences of Kinetic Isotope Effect in Hydride Transfer Reactions
作者:Xiao-Qing Zhu、Xiu-Tao Li、Su-Hui Han、Lian-Rui Mei
DOI:10.1021/jo3005952
日期:2012.5.18
one-step hydride transfer is not due to an elementary chemical reaction. The experimental values of KIE at different temperatures for the hydride transferreactions were modeled by using a kinetic equation formed according to a multistage mechanism of the hydride transfer including a returnable charge-transfer complex as the reaction intermediate; the real mechanism of the hydride transfer and the root
Intramolecular dehydrogenative coupling of biaryl tertiary amines promoted with t-BuOK/DMF: A convenient synthesis of 6-aryl-5,6-dihydrophenanthridines
作者:Ting Zhang、Lu Qian、Zhen-yu Chen、Yong Zou、Xue-jing Zhang、Ming Yan
DOI:10.24820/ark.5550190.p010.000
日期:——
A number of 6-aryl-5,6-dihydrophenanthridines were prepared in good yields via an intramoleculardehydrogenativecoupling of biaryltertiaryaminespromoted by t-BuOK/DMF. A reaction mechanism involving -aminoalkyl radical intermediates is suggested. N R t-BuOK (3.0 equiv.) DMF,150 °C, 3 h N R Ar1
通过 t-BuOK/DMF 促进的联芳基叔胺的分子内脱氢偶联,以良好的产率制备了许多 6-芳基-5,6-二氢菲啶。提出了涉及α-氨基烷基自由基中间体的反应机制。NR t-BuOK(3.0 当量)DMF,150 °C,3 小时 NR Ar1