Emergence of a Novel Catalytic Radical Reaction: Titanocene-Catalyzed Reductive Opening of Epoxides
作者:Andreas Gansäuer、Harald Bluhm、Marianna Pierobon
DOI:10.1021/ja981635p
日期:1998.12.1
The preparatively important catalytic opening of epoxides to β-titanoxy radicals via single-electron transfer (SET) is described. These radicals can be reduced to alcohols or participate in C−C bond-forming reactions. A key step in the catalytic cycle is the conceptually novel protonation of titanium−oxygen and −carbon bonds. Our method combines the advantages of radical reactions, e.g., high functional
描述了通过单电子转移 (SET) 将环氧化物催化打开为 β-钛氧基自由基的重要催化作用。这些自由基可以还原为醇或参与 C-C 键形成反应。催化循环的一个关键步骤是概念上新颖的钛-氧和-碳键的质子化。我们的方法结合了自由基反应的优点,例如在质子条件下自由基的高官能团耐受性和稳定性,以及有机金属配合物确定试剂控制反应中转化过程的能力。