Mechanistic Study of the Titanocene(III)-Catalyzed Radical Arylation of Epoxides
作者:Andreas Gansäuer、Daniel von Laufenberg、Christian Kube、Tobias Dahmen、Antonius Michelmann、Maike Behlendorf、Rebecca Sure、Meriam Seddiqzai、Stefan Grimme、Dhandapani V. Sadasivam、Godfred D. Fianu、Robert A. Flowers II
DOI:10.1002/chem.201404404
日期:2015.1.2
An atom‐economical and catalyticarylation of epoxide‐derived radicals is described. The key step of the catalytic system is a sequential electron and proton transfer for the rearomatization of the radical σ‐complex and catalyst regeneration. Kinetic, computational, spectroscopic, and cyclovoltammetric investigations highlight the key issues of the reaction mechanism and catalyst stabilization by collidine
Anti‐Markovnikov Hydroamination and Hydroalkoxylation of Allylic Alcohols Promoted by a Simple Rare‐Earth Metal Trialkyl Complex
作者:Xiancui Zhu、Jinrong Sun、Zhixin Wu、Dianjun Guo、Shuangliu Zhou、Shaowu Wang
DOI:10.1002/adsc.202301142
日期:2024.3.19
hydroalkoxylation of allylic alcohols catalyzed by a simple catalyst Y(CH2SiMe3)3(THF)2 has been developed, providing a variety of γ-amino and γ-alkoxy alcohols in good yields under mild conditions. Moreover, this protocol is applied to the synthesis of drug molecules Propipocaine and Proroxan. The rare-earth catalyst features readily available, wide substrate compatability, exclusive anti-Markovnikov selectivity