Diasteroselective synthesis of oxazolidines and imidazolidines via the Lewis acid catalyzed C–C cleavage of aziridines
作者:Zheng Jiang、Jing Wang、Ping Lu、Yanguang Wang
DOI:10.1016/j.tet.2011.09.085
日期:2011.12
In this work, cis-2,5-disubstitutedoxazolidines were efficiently constructed via a regioselective C–C bond cleavage of N-tosylaziridine 2,2-dicaboxylates and a subsequent [3+2] cycloaddition with aromatic aldehydes in the presence of Zn(OTf)2. The reactions were highly diastereoselective to form oxazolidines in cis configurations. trans-2,5-Disubstituted imidazolidines were also diastereoselectively
Y(OTf)3-Catalyzed Diastereoselective [3+2] Cycloaddition of N-Tosylaziridines and Imines; Efficient Synthesis of Multisubstituted Imidazolidines
作者:Junliang Zhang、Xingxing Wu
DOI:10.1055/s-0031-1290816
日期:2012.7
Abstract An efficient Y(OTf)3-catalyzed generation of azomethine ylides from donor–acceptor aziridines and their [3+2] cycloaddition with imines was developed. The method provides facile access to multisubstituted imidazolidines, which have been extensively used in organic synthesis. Furthermore, a three-component reaction on a gram scale and an asymmetric variation were also developed in this work
Efficient Synthesis of Diarylmethylamines via Lewis Acid Catalyzed Friedel–Crafts Reactions of Donor–Acceptor Aziridines with N,N-Dialkylanilines
作者:Yerin Kim、Yong Il Kwon、Sung-Gon Kim
DOI:10.1055/s-0039-1690731
日期:2020.1
A method for efficient and mild synthesis of diarylmethylamine scaffold, via Lewis acidcatalyzed Friedel–Crafts reaction of donor–acceptor aziridines with N,N-dialkylanilines to afford a biologically important diarylmethylamine derivatives in high yields (up to 88%), is presented. This reaction is suitable for the synthesis of various diarylmethylamine derivatives and has a broad scope for electron-rich
Lewis acid-catalyzed [3+3] cycloadditions of donor‒acceptor aziridines with N,N-dialkyl-3-vinylanilines via carbon-carbon bond cleavage
作者:Sang Gyu Lee、Sung-Gon Kim
DOI:10.1016/j.tet.2018.05.031
日期:2018.7
Lewis acid-catalyzed [3 + 3] cycloaddition reaction of donor‒acceptor aziridines with N,N-dialkyl-3-vinylanilines has been developed for the stereoselectivesynthesis of tetrahydroisoquinolines (THIQs). The reaction performed using Gd(OTf)3 as the Lewis acid catalyst was tolerant to various N-tosylaziridine and N,N-dialkyl-3-vinylaniline substrates and provided access to highly functionalized THIQs
Lewis acid-catalyzed formal [3+2] cycloadditions of N-tosyl aziridines with electron-rich alkenes via selective carbon–carbon bond cleavage
作者:Lei Li、Xingxing Wu、Junliang Zhang
DOI:10.1039/c1cc10926j
日期:——
A novel, mild, robust catalyst Y(OTf)(3) for C-C bond heterolysis of N-tosyl aziridines was developed and the resulting metallo-azomethine ylides may readily undergo [3+2] dipolarcycloaddition with an electron-rich olefin via a stepwise reaction pathway with high regio- and diastereoselectivity leading to substituted pyrrolidines.