Optically active polyamides with regular structural sequences prepared froni α‐amino acid

Abstract

Abstract Optically active polyamides with regular structural sequences have been prepared from L‐lysine and adipic acid. A novel optically active symmetrical diamine, N.N'‐bis(L‐5‐amino‐5‐carboxyl‐amyl)adipamide, was obtained by treating L‐lysine with adipyl chloride in the presence of copper(II) ions. The interfacial polycondensation of this diamine with adipyl chloride afforded a regular polymer, while the polycondensation of L‐lysine with adipyl chloride gave an irregular polymer of the same analytical composition. The melting points, optical rotations and the optical rotatory dispersions of these polymers were investigated.