N-carboxy-anhydrides derived from threo- and erythro-β-hydroxyaspartic acids and poly-β-methyl hydrogen threo-β-methoxy-<scp>DL</scp>-aspartate
作者:Y. Liwschitz、A. Singerman
DOI:10.1039/j39670001696
日期:——
The N-carboxy-anhydridesderivedfrom either threo- or erythro-β-hydroxy-DL-Aspartic ACID In which the hydroxy-group is protected by an acetyl group and the β-carboxy-group by a benzyl or methyl ester do not undergo polymerisation in solution by basic catalysts or in bulk. This is due to an O→N-acetyl shift. Polymerisation does take place after methylation of the hydroxy-group.