Structural Modification of Living Polymers: Synthesis of Helical Block Copolymers from a Single Monomer via Palladium-Mediated Aromatizing Polymerization of 1,2-Diisocyanobenzenes

New optically active helical block copolymers were synthesized by palladium-mediated living sequential copolymerization of 4,5-bis[( tert -butyldimethylsilyloxy)ethoxymethyl]-3,6-dimethyl-1,2-diisocyanobenzene followed by deprotection of the polymer side chains and subsequent structural modification without quenching the living site of the polymer.