Vinyl triflates of α-keto esters react smoothly with primary amines to provide aziridinecarboxylates in good yields. In all cases, little or no stereoselectivity was observed. A mechanistic study has shown that aziridinecarboxylates are strictly formed under kinetic control. The origin of this lack of stereoselectivity is explained by a non- or poorly stereoselective proton transfer.
Reaction of vinyl triflates of α-keto esters and imides with secondary amines: synthesis of α,β-diamino carboxylic acid derivatives through aziridinium ions
作者:Marie-José Tranchant、Vincent Dalla
DOI:10.1016/j.tet.2006.07.085
日期:2006.10
Reaction between secondaryamines and vinyl triflates of α-keto esters and imides under solvent-free condition provides a ready access to α,β-diamino carboxylates.