benzyl (S)-1-(3-((S)-1-N-Boc-aminoethyl)phenyl)propan-2-ylcarbamate

benzyl (S,E)-(1-(3-(1-((diphenylphosphoryl)imino)ethyl)phenyl)propan-2-yl)carbamate

(S)-benzyl 1-(3-(2-hydroxypropan-2-yl)phenyl)propan-2-ylcarbamate

(S)-benzyl 1-(3-(2-azidopropan-2-yl)phenyl)propan-2-ylcarbamate