Study and Applications of Tetrasubstituted Hypervalent Selenium–Halogen Species in Catalytic Electrophilic Halogenations
作者:Junjie Yang、Yung-Yin Chan、Weida Feng、Ying-Lung Steve Tse、Ying-Yeung Yeung
DOI:10.1021/acscatal.2c05414
日期:2023.2.17
Electrophilic halogenation reactions are highly useful in various areas. N-Haloamides are commonly used as halogen sources because of high stability and commercial availability. In order to activate N-haloamides, Lewis basic chalcogens are commonly used as catalysts to site-isolate the strongly coordinating amide moieties. However, the corresponding trisubstituted chalcogenonium–halogen cationic intermediate
A General Process for the Haloamidation of Olefins. Scope and Mechanism
作者:Yeung、Xuri Gao、E. J. Corey
DOI:10.1021/ja063675w
日期:2006.8.1
with the olefin. The amide group is derived from a nitrile and a water molecule which serve as nucleophiles for the overall three-component reaction. The bromoamidation is general for a broad range of olefins and nitriles. This reaction pathway provides access not only to vicinal bromoamides but also to N-acyl aziridines and oxazolines. From these, many types of amines and amino alcohols can be prepared