Published online by Cambridge University Press: 15 February 2011
A synthetic approach to polyamides containing the tyrosine-leucine linkage is presented. The diphenyl phosphoryl azide, (DPPA), coupling technique was utilized to synthesize the monomers. Solution polymerization of monomer I, tyrosylleucyliminohexamethyleneiminoleucyltyrosine, with adipoyl and sebacoyl chlorides gave polymers with intrinsic viscosities of 0.18 dL/g and 0.13 dL/g respectively in 90% formic acid. Interfacial polymerization of the monomer yielded a fibrous crosslinked material which was found to be a poly(amide-ester) by IR spectroscopic analysis.