A series of N-tert-butoxycarbonylated N-allyl, N-propargyl, N-benzyl o
r branched N-alkyl glycines, useful building blocks for the synthesis
of N-alkyl glycine oligomers, have been prepared by N-alkylation of N-
Boc glycine or by a two-step method: reductive alkylation and tert-but
oxycarbonylation.