Zheng-Lin's work on Cu-H/Si mediated regioselective CPPE has been published on JACS.
In this work, we reported the CPPE polymerization of conjugated enyne electrophiles catalyzed by Cu-H/Si species, obtaining regioregular (>93% “head-to-tail”) poly(2-butyne-1,4-diyl)s (HT-PBD). We also demonstrated a one-pot copolymerization method to synthesize controllable silicon-containing acetylene polymers, and achieved a one-pot polymerization/semi-reduction synthesis of polymers with cis-poly(butadiene)-derived backbone through ligand swap. Besides, special addition selectivity of copper boron species in this system was found and discussed.
