Lewis acid promoted intramolecular (3 + 2) ‘cycloadditions’ of methyleneaziridines with alkene and alkyne acceptors
作者:Karen Griffin、Cyril Montagne、Cam Thuy Hoang、Guy J. Clarkson、Michael Shipman
DOI:10.1039/c1ob06578e
日期:——
2-Methyleneaziridines can be tethered to a variety of alkene or alkyne acceptors through the saturated carbon of the heterocyclic ring by application of a simple lithiation/alkylation sequence (8 examples, 31–59%). Treatment of the resultant alkene bearing substrates with BF3·OEt2 leads to cis-octahydrocyclopenta[c]pyrroles in which up to four contiguous stereocentres are created in a diastereocontrolled