Iminoxyl Radical-Promoted Dichotomous Cyclizations: Efficient Oxyoximation and Aminooximation of Alkenes
作者:Xie-Xue Peng、Yun-Jing Deng、Xiu-Long Yang、Lin Zhang、Wei Yu、Bing Han
DOI:10.1021/ol502258n
日期:2014.9.5
A novel iminoxyl radical-involved metal-free approach to vicinal oxyoximation and aminooximation of unactivated alkenes is developed. This method utilizes the dichotomous reactivity of the iminoxyl radical to furnish a general difunctionalization on alkenes using simple tert-butyl nitrite (TBN) as the iminoxyl radical initiator as well the carbon radical trap. By using this protocol, oxime featured 4,5-dihydroisoxazoles and cyclic nitrones were facilely prepared from beta,gamma- and gamma,delta-unsaturated ketoximes, respectively.