catalyzes the aziridinationreactions of enol silyl ethers with tosylimino(iodo)benzene (PhINTs) in acetonitrile to give α-N-tosylamido ketones by subsequent aziridine ring opening. Olefins are converted into aziridines by 5 mol% of this catalyst system. Both reactions afford the corresponding products in moderate to good yields. In the presence of chiral ligands asymmetric aziridinations have been achieved
Catalytic stereoselective alkene aziridination with sulfonimidamides
作者:Fabien Robert-Peillard、Pablo H. Di Chenna、Chungen Liang、Camille Lescot、Florence Collet、Robert H. Dodd、Philippe Dauban
DOI:10.1016/j.tetasy.2010.03.032
日期:2010.6
Diastereoselective copper-catalyzed alkene aziridination has been investigated using chiral nitrenes generated from sulfonimidamides in the presence of an iodine(III) oxidant. Starting from a stoichiometric amount of the substrates, the corresponding aziridines were isolated with excellent yields of up to 96%. Good levels of asymmetric induction were obtained in the case of electron-poor olefins, with an optimal de of 94% being reached starting from tert-butyl acrylate. Matching and mismatching effects were also observed upon the use of chiral copper catalysts for the aziridination of styrene. (C) 2010 Elsevier Ltd. All rights reserved.
Sulfonimidamides: Efficient Chiral Iminoiodane Precursors for Diastereoselective Copper-Catalyzed Aziridination of Olefins
作者:Pablo H. Di Chenna、Fabien Robert-Peillard、Philippe Dauban、Robert H. Dodd
DOI:10.1021/ol048167a
日期:2004.11.1
latter gives, in the presence of a copper(I) catalyst, a nitrene that is very efficiently transferred under stoichiometric conditions to a variety of alkenes with diastereoselectivities up to 60%. [reaction: see text]