Stereoselective Chlorination and Bromination of Enamides and Enamines via an Electrostatic Attraction Effect Using (1,1-Diacetoxyiodo)benzene and a Halide Source
作者:Linlin Xing、Chunbao Li
DOI:10.1021/acs.joc.5b01603
日期:2015.10.16
structure of the intermediates, the conformations of which are controlled by the electrostatic attractions between the positively charged nitrogen atoms and the oxygen atoms of the carbonyl group. This type of electrostatic effect has never been reported in olefin halogenations. For this reason, the three-membered bromoniumion is only a minor intermediate in the enamine bromination pathway. These methods