I. Coldham et al., N-ALKYLATION AND [2,3]-SIGMATROPIC REARRANGEMENT OF N-ALLYL ALPHA-AMINO ESTERS, Journal of the Chemical Society. Perkin transactions. I, (20), 1997, pp. 2951-2952
N-Alkylation of N-allyl alpha-amino esters and [2,3]-Stevens rearrange
ment occur in one pot on warming in the solvent DMF, with the bases K2
CO3 and DBU; this in situ formation of the quaternary ammonium salts a
nd rearrangement of the subsequent ylides gives N,N-dialkylated allyl
glycine derivatives.