Adamantyl aziridines via aza-Michael initiated ring closure (aza-MIRC) reaction
作者:Alena I. Fedotova、Tatiana A. Komarova、Alexey R. Romanov、Igor A. Ushakov、Julien Legros、Jacques Maddaluno、Alexander Yu. Rulev
DOI:10.1016/j.tet.2017.01.006
日期:2017.2
An efficient one-pot synthesis of functionalized adamantylaziridines by aza-Michael initiated ringclosure (aza-MIRC) reaction of 1-aminoadamantane with α-halogenated Michael acceptors is described. The reaction goes through an aza-Michael intermediate that undergoes an intramolecular nucleophilic substitution. Expectedly, high pressure exerts a beneficial influence in the case of sterically hindered
DEPN (N-(2-methylpropan-2-yl)-N-(1-diethylphosphono-2,2-dimethylpropyl)-aminoxyl) based alkoxyamines were studied by means of (1)H and (31)P NMR spectroscopy aiming to distinguish the contributions of diastereoselective homolysis and coupling to the total equilibrium diastereomeric distribution. The TEMPO-based compounds reveal no diastereomeric excess while DEPN based compounds show a moderate excess
Réactions de cyclopropanation par double addition de Michael.
作者:Marc Joucla、Bernard Fouchet、Jacques Le Brun、Jack Hamelin
DOI:10.1016/s0040-4039(00)98438-7
日期:1985.1
The addition of nucleophiles to alkyl α bromoacrylates in aprotic media leads to the stereospecific formation of cyclopropanes by a double Michael addition reaction.