Solid-Phase, Multicomponent Reactions of Methyleneaziridines: Synthesis of 1,3-Disubstituted Propanones
作者:Jean-François Margathe、Michael Shipman、Stephen C. Smith
DOI:10.1021/ol051953a
日期:2005.10.1
[reaction: see text] Polymer-supported methyleneaziridines undergo ring opening by Grignard reagents under copper catalysis to yield metalloenamines which are alkylated in situ to yield ketimines. Filtration and washing of these Merrifield resin-bound intermediates prior to hydrolysis provides the corresponding 1,3-disubstituted propanones in a high state of purity without recourse to column chromatography
Intramolecular Radical Rearrangement Reactions of 2-Methyleneaziridines: Application to the Synthesis of Substituted Piperidines, Decahydroquinolines, and Octahydroindolizines
作者:Natacha Prévost、Michael Shipman
DOI:10.1021/ol016194k
日期:2001.7.1
[GRAPHICS]Intramolecular 5-exo cyclization of 3-(2-methyleneaziridin-1-yl)propyl radicals leads to the generation of a highly strained, bicyclic aziridinylcarbinyl radical that undergoes C-N bond fission to the ring-expanded aminyl radical. This methodology provides access to substituted 3-methylenepiperidines and, by combining it with an additional 5-exo-trig cyclization reaction, the octahydroindolizidine skeleton.