Addition of HO-Acids to <i>N</i>
,<i>N</i>
-Bis(oxy)enamines: Mechanism, Scope and Application to the Synthesis of Pharmaceuticals
作者:Yana A. Naumovich、Ivan S. Golovanov、Alexey Yu. Sukhorukov、Sema L. Ioffe
DOI:10.1002/ejoc.201701266
日期:2017.11.9
calculations revealed that solvent affects the reaction pathway. In basic solvents (DMF, NMP, DMSO), N,N-bis(oxy)enamines were converted into nitrosoalkenes by a Lewis base promoted process followed by oxy-Michael addition of the HO-acid. In non-polar solvents (toluene, CH2Cl2), the reaction occurs by an acid-promoted SN′ substitution of the N-oxy-group via a highly reactive N-vinyl-N-alkoxynitrenium species.