A novel early and late transition-metal relay catalysis has been developed by combining a gold-catalyzedcycloisomerization and a Yb(OTf)3-catalyzed diastereoselective [3 + 2] cycloaddition with aziridines in a selective C–C bond cleavage mode. Various biologically significant complex nitrogen-containing spiro heterocycles were rapidly constructed from readily available starting materials under mild
Facile iodine(III)-induced oxidative cycloaddition of N-sulfonyl imines with methylene compounds under neutral conditions
作者:Renhua Fan、Linfei Wang、Yang Ye、Jin Zhang
DOI:10.1016/j.tetlet.2009.04.056
日期:2009.7
An efficient oxidative cycloaddition of N-sulfonyl imines with methylene compounds using PhIO with a catalytic amount of KI under neutral conditions, which affords 2,2-difunctionalized aziridines in good to excellent yields, is reported. (c) 2009 Elsevier Ltd. All rights reserved.
Iodobenzene Diacetate/Tetrabutylammonium Iodide‐Induced Aziridination of<i>N</i>‐Tosylimines with Activated Methylene Compounds under Mild Conditions
作者:Renhua Fan、Yang Ye
DOI:10.1002/adsc.200800157
日期:2008.7.7
Aziridination of N-tosylimines with activatedmethylenecompoundsinduced by iodobenzenediacetate [PhI(OAc)2] and tetrabutylammonium bromide [Bu4NBr] afforded the corresponding 2,2-difunctionalized aziridines in good yields with the aid of a catalytic amount of base. The reaction is hypothesized to proceed via a tandem nucleophilic addition-oxidative cyclization pathway.