Methyl O-benzyl-2-(alpha-cyanomethyl)-D-tyrosinate and dimethyl 2-(4-hydroxybenzyl)-L-aspartate were synthesized starting from (2S,4R)-4-hydroxyproline via Beckmann fragmentation of the corresponding oxime tosylate.
Synthetic Studies on α,α-Disubstituted Amino Acids Employing (2S,4R)-4-Hydroxyproline as the Chiral Pool: Preparation of Methyl O-Benzyl-2-(α-cyanomethyl)-D-tyrosinate and Dimethyl 2-(4-hydroxybenzyl)-L-aspartate
Methyl O-benzyl-2-(alpha-cyanomethyl)-D-tyrosinate and dimethyl 2-(4-hydroxybenzyl)-L-aspartate were synthesized starting from (2S,4R)-4-hydroxyproline via Beckmann fragmentation of the corresponding oxime tosylate.