Key points are not available for this paper at this time.
Abstract New generations of Hoveyda and bis‐carbene type of ruthenium‐based olefin metathesis catalysts ( 10 and 12 ), containing cationic cyclic alkyl amino carbene (CAAC) ligands, have been synthetized. The catalysts show exceptional stability and activity in environmentally benign, protic media. Various olefin metatheses reactions of OH functionalized feedstock (e. g. RCM, ROMP CM) can be carried out at as low as 0.05 mol % catalyst loading in methanol, isopropanol, water or methanol/water solvent mixture, accomplishing the lowest applied catalyst loading reported so far in these media. The facile olefin metathesis of renewable feedstocks including phospholipids ( 23 ) and vegetable oils ( 20 ) in protic media has also been demonstrated.
Nagyházi et al. (Tue,) studied this question.