Construction of Bridged Aza- and Oxa-[<i>n</i>.2.1] Skeletons via an Intramolecular Formal [3+2] Cycloaddition of Aziridines and Epoxides with Electron-Deficient Alkenes
intramolecular formal [3+2] cycloaddition of activated aziridines and epoxides with electron-deficient alkene has been developed for the general and efficient construction of bridged aza- and oxa-[n.2.1] (n = 3 or 4) skeletons. This strategy can be efficiently promoted by lithium iodide. To demonstrate its potential, the intramolecular formal [3+2] cycloaddition was used to access the important intermediate of homoepiboxidine
Acid-Catalyzed Domino Meinwald Rearrangement of Epoxides/Intramolecular [3+2] Cross-Cycloaddition of Cyclopropane-1,1-dicarboxylates
作者:Wenju Zhu、Jun Ren、Zhongwen Wang
DOI:10.1002/ejoc.201402160
日期:2014.6
An acid-catalyzed domino Meinwald rearrangement of epoxides/intramolecular [3+2] cross-cycloaddition of cyclopropane 1,1-diesters was developed. This supplied a method for the construction of bridged oxa-[n.2.1] (n = 3, 4) skeletons.