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
Titanocene(III)-Catalyzed Formation of Indolines and Azaindolines
作者:Peter Wipf、John P. Maciejewski
DOI:10.1021/ol801860s
日期:2008.10.2
Reductive cyclization of epoxides tethered to substituted anilines and aminopyridines in the presence of 3 mol % of titanocene dichloride and stoichiometric manganese metal promotes a radical annulation to form 3,3-disubstituted indolines and azaindolines.