Palladium-catalyzed copolymerization of ethylene or propylene with norbornene carboxylic acids and their esters

Synthesis of partially fluorinated polyolefins via copolymerization of ethylene with fluorinated norbornene-based comonomers

“…It has been widely demonstrated that phosphine-sulfonate palladium catalysts exhibit remarkable efficiency in catalyzing the copolymerization of ethylene with polar norbornenes, leading to great copolymerization results in terms of copolymerization activities, comonomer incorporation ratios, and copolymer molecular weights. [24][25][26][27][28][29] Absolutely, they are far superior to other late transition metal catalysts. 30,31 Inspired by this, we designed a series of fluorinated norbornene-based comonomers (Scheme 1c), 5-norbornene-2-carboxylic acid perfluoroalkyl esters (mono-NBFn) and cis-norbornene-exo-2,3dicarboxylic acid diperfluoroalkyl esters (di-NBFn), and investigated their copolymerization with ethylene to produce partially fluorinated polyolefins using phosphine-sulfonate palladium catalysts.…”