asymmetric ring-opening amination reaction of cyclic diaryliodoniums. Increasing the torsional strain of these cyclic compounds significantly improved the reactivity of cyclic diaryliodoniums. Computational investigation indicated that the two conformers of the cyclic diaryliodoniums had a low rotational barrier, and generally the reaction achieved high yields and high enantioselectivity (up to >99%
Copper-Catalyzed Asymmetric Ring-Opening of Cyclic Diaryliodonium with Benzylic and Aliphatic Amines
作者:Shibo Xu、Kun Zhao、Zhenhua Gu
DOI:10.1002/adsc.201800637
日期:2018.10.18
A Cu‐catalyzed asymmetric ring‐opening reaction between cyclic diaryliodonium and benzylic or aliphatic amines has been developed. At low concentration of the amines, realized by either mixing the amines with Lewis acid or slow addition of the amines, the reaction afforded the products in high enantioselectivity.