Oxidation–Cope elimination: a REM-resin cleavage protocol for the solid-phase synthesis of hydroxylamines

We have established that using an oxidation-Cope elimination cleavage protocol allows for the synthesis of N,N-disubstituted hydroxylamines from REM resin (polymer-bound benzyl acrylate). Michael addition of a secondary amine or addition of a primary amine followed by reductive alkylation provides polymer-bound tertiary amines. Oxidation of these resin-bound tertiary amines with MCPBA is followed by concomitant Cope elimination to regenerate the polymer-bound acrylate and provide the cleaved hydroxylamines.