Oxime-Mediated Oxychlorination and Oxybromination of Unactivated Olefins
作者:Kui-Yong Dong、Hai-Tao Qin、Feng Liu、Chen Zhu
DOI:10.1002/ejoc.201403538
日期:2015.3
An oxime-mediatedoxychlorination and oxybromination of unactivatedolefins relying on palladium catalysis has been developed. A wide range of chlorinated and brominated isoxazolines has been synthesized in moderate to good yields. To demonstrate the value of the method, the brominated isoxazoline has been further converted to other useful synthetic feedstock.
A general and efficient oxyhalogenation of unsaturated ketoximes has been achieved through copper catalysis with diethyl bromomalonate, N-chlorosuccinimide, and N-iodosuccinimide, yielding 5-chloromethyl, 5-bromomethyl, and 5-iodomethyl isoxazolines in good to excellent yields.
作者:Michael D. Mosher、Amber L. Norman、Khriesto A. Shurrush
DOI:10.1016/j.tetlet.2009.07.106
日期:2009.10
The preparation of substituted 4,5-dihydroisoxazoles can be accomplished via the treatment of beta,gamma-unsaturatecl oximes with liquid bromine. The reaction provides a convenient route to the highly functionalized title compounds. (C) 2009 Elsevier Ltd. All rights reserved.