acid-catalyzed [3+1+1] cycloaddition reaction between aliphatic isocyanides and azomethineylides generated in situ from aziridines, leading to pyrrolidine derivatives, has been developed. This reaction proceeds smoothly under mild conditions and can also be modified by employing aromatic isocyanides to generate four-membered heterocycles, azetidines, through a [3+1] cycloaddition reaction.
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.
Nickel(ii)-catalyzed diastereoselective [3+2] cycloaddition of N-tosyl-aziridines and aldehydes via selective carbon–carbon bond cleavage
作者:Xingxing Wu、Lei Li、Junliang Zhang
DOI:10.1039/c1cc12189h
日期:——
An efficient and mild Ni(ClO4)2-catalyzed [3+2] cycloaddition of N-tosylaziridines and aldehydesvia CâC bond cleavage was developed. The cycloaddition reaction proceeds with high diastereoselectivity and regioselectivity leading to highly substituted 1,3-oxazolidines. Notably, this novel reaction can be easily expanded to gram level scale and the thermal conditions cannot achieve the same transformation.