Copper Promoted Regio- and Stereoselective Aminochlorination of Alkynes and Alkenes with NFSI
作者:Weilin Wang、Lingyan Liu、Weixing Chang、Jing Li
DOI:10.1002/chem.201801262
日期:2018.6.18
aminochlorination of unactivated alkynes and alkenes with N‐fluorobenzenesulfonimide (NFSI) was developed. Two series of chloroenamines and chloroamines were obtained in good to high yields. The chlorinated enamines could be obtained in a single E configuration. This reaction involved a radical process and the CuCl2 acted as the Cl source and NFSI as the N source.
A copper-catalyzed, 2,2,6,6-tetramethyl piperidine N-oxy radical-assisted intermolecular diamination of styrenes with N-fluorobenzenesulfonimide has been developed. The current protocol proved amenable to a diverse array of styrenes via cascade radical addition to readily afford synthetically useful aromatic vicinal diamines with exclusive diastereoselectivity.
facile construction of CN bonds by the generation of nitrogen‐centred radicals from N‐fluorobenzenesulfonimide results in the aminative difuctionalization of alkenes. The first copper‐catalyzed intermolecular aminocyanation of alkenes and diamination of styrenes were realized. Si–F and B–F interactions play a significant role in the reaction.
Iodine(III)-Mediated Intermolecular Allylic Amination under Metal-Free Conditions
作者:José A. Souto、Debora Zian、Kilian Muñiz
DOI:10.1021/ja3013193
日期:2012.5.2
A new approach to direct intermolecular allylic amination has been developed using metal-free conditions at roomtemperature. The reaction employs a hypervalent iodine(III) reagent as an oxidant and bistosylimide as a nitrogen source. A series of different allylic aminations are presented with up to a 99% yield. Mechanistic studies including isotope labeling and Hammett correlation suggest that depending