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Synthesis of Optically Active Macromolecules Using Metallocene Catalysts
Author(s) -
Okuda Jun
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199200471
Subject(s) - metallocene , cyclopentane , catalysis , enantioselective synthesis , polymer chemistry , post metallocene catalyst , methylene , monomer , macromolecule , chemistry , ligand (biochemistry) , polymer , materials science , organic chemistry , polymerization , biochemistry , receptor
A transition‐metal catalyzed enantioselective cyclopolymerization was successfully achieved by Waymouth et al. in the reaction of the achiral monomer 1,5‐hexadiene to form poly (methylene‐1,3‐cyclopentane) containing chiral main chains with the optically active metallocene catalyst 1 and methylalumoxane; in contrast, a diastereoselective linkage of cyclopentane units is possible with catalysts such as [Cp 2 ZrCl 2 ]/methylalumoxane. These results are very promising because they bring us a significant step closer to a rational synthesis of organic polymers with defined microstructure by modification of the ligand sphere of the transition‐metal catalyst.