Catalytic Oxidation of Hydrazo Derivatives Promoted by a TiCl<sub>3</sub>/HBr System
作者:Eyal Drug、Michael Gozin
DOI:10.1021/ja074413c
日期:2007.11.1
Through a novel catalytic process of general synthetic interest, hydrazo compounds were efficiently and selectively converted into corresponding azo derivatives. The proposed mechanism of this process comprises two separate and distinctive catalytic cycles, linked together by radical species. The first cycle includes formation of a hydroxy radical, generated by Ti(III) single-electron reduction of
通过具有普遍合成意义的新型催化过程,可以有效且选择性地将偶氮化合物转化为相应的偶氮衍生物。该过程的拟议机制包括两个独立且独特的催化循环,通过自由基物种连接在一起。第一个循环包括由 H2O2 的 Ti(III) 单电子还原产生的羟基自由基的形成。在第二个循环中,羟基自由基将 HBr 氧化成次溴酸,而次溴酸又被偶氮底物还原回 HBr 和水。