In the course of preparing some novel peptides by the Leuchs-anhydride route, two new amino acids,~~-2-(o-ethoxyphenyl) glycine and l-aniinocyclooctanecarboxylic acid, were prepared by variants of the Strecker synthesis. In addition, l-aminocyclobutanecarboxylic acid and DL-2-phenylsarcosine were prepared by improved procedures. New 2, 5- oxazolidinediones were prepared from these acids as. wel1 as from D-and L-2- ...