Synthesis of a Novel AB Block Copolyaceylene Consisting of a Dynamic Cis-transoidal Racemic Helical Sequence and a Static Cis-cisoidal One-handed Helical Sequence

We have successfully synthesized a novel chiral AB block copolyacetylene consisting of a dynamic cis-transoidal racemic helical sequence and a static cis-cisoidal one-handed helical sequence by using a three step procedure, that is, synthesis of an achiral block copolymer by living polymerization of OH-protected monomers, deprotection of the resulting polymer, and selective chiral induction to that of the sequence.