Abstract
New catalysts (PCy3)2Cl2Ru═CH(p-C6H4)CH2-P(CH3)3+Cl− (5) and (PCy3)2Cl2Ru═CH(p-C6H4)CH2-N(CH3)2 (6) as well as the literature compound (PCy3)2Cl2Ru═CH(p-C6H4)N(CH3)2 (7) have been synthesized via alkylidene exchange from Grubbs’ catalyst in a one-step reaction. The catalysts promoted ROMP of the cationic exo-7-oxanorbornene derivative 11 under homogeneous conditions in various protic media including aqueous/alcoholic 1:1 mixtures, and in many cases, particularly for catalysts 5 and 6, the polymerizations proceeded in a controlled manner.
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