Novel Ruthenium-Based Catalyst Systems for the Ring-Opening Metathesis Polymerization of Low-Strain Cyclic Olefins
作者： Albert Demonceau , Andreas W. Stumpf , Eric Saive , Alfred F. Noels
DOI: 10.1021/MA961040J
关键词: Polymer chemistry 、 Ring-opening metathesis polymerisation 、 Polymerization 、 Tricyclohexylphosphine 、 Metathesis 、 Ring-opening polymerization 、 Phosphine 、 Norbornene 、 ROMP 、 Chemistry
摘要: Highly active catalyst systems for the ring-opening metathesis polymerization (ROMP) of strained (norbornene) and low-strain (cyclooctene) olefins are readily prepared from RuCl2(arene)(PR3) precursors (directly available by addition a phosphine to stable [(arene)RuCl2]2 dimers) after activation with (trimethylsilyl)diazomethane. Durene or p-cymene as arene ligands, together sterically demanding basic (typically tricyclohexylphosphine), promoted formation most catalysts. The effects ligands solvent on polynorbornene polyoctenamer molecular weight distributions microstructures were investigated. excellent functional group compatibility system was illustrated synthesis variety polyoctenamers bearing epoxide, acid, ether, ester, acetal, bromine functionalities. polymers isolated in quite good yields. striking positional influence the...
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