Rhodium/Chiral Diene-Catalyzed Asymmetric Cyclopolymerization of Achiral 1,8-Diynes
摘要:
Cyclopolymerization of nitrogen-bridged 1,8-diynes containing one terminal and one internal alkyne in the presence of a rhodium/chiral diene catalyst gave enantiomerically enriched polymers with a helix chirality that keep their chiral structures in solution. This polymerization proceeded through alternating reaction of the terminal and the internal alkynes, forming polyacetylenes with a 1,2-dialkylidene heterocyclic unit.
Cyclopolymerization of nitrogen-bridged 1,8-diynes containing one terminal and one internal alkyne in the presence of a rhodium/chiral diene catalyst gave enantiomerically enriched polymers with a helix chirality that keep their chiral structures in solution. This polymerization proceeded through alternating reaction of the terminal and the internal alkynes, forming polyacetylenes with a 1,2-dialkylidene heterocyclic unit.