Latent metathesis catalysts equipped with boronate esters of diols as exchangeable end-groups on their NHC ligands and an S-chelated ruthenium-benzylidene core were synthesized. The stable S-chelated ruthenium complexes underwent hydrolysis under mild acidic conditions, allowing easy exchange of terminal units by several 1,2- and 1,3-diols, without degrading the central ruthenium benzylidene. Using this strategy, we also prepared metathesis catalysts equipped with diallyl substrates at the termini that showed concentration dependency on RCM reactions. Notably, the larger dendritic catalysts were more efficient at the more dilute condition.
|Number of pages||13|
|Journal||Journal of Coordination Chemistry|
|State||Published - 3 Jul 2018|
Bibliographical noteFunding Information:
The Israel Science Foundation is gratefully acknowledged for a F.I.R.S.T. grant 1067/15 (OR and NGL) and an individual ISF grant 537/14 (NGL) that funded this research. The Open University is acknowledged for partial financial support.
- Olefin metathesis
- boronic esters
- dynamic covalent reactions
- latent catalysts