Widening the Latency Gap in Chelated Ruthenium Olefin Metathesis Catalysts
作者:Yakov Ginzburg、Aviel Anaby、Yuval Vidavsky、Charles E. Diesendruck、Amos Ben-Asuly、Israel Goldberg、N. Gabriel Lemcoff
DOI:10.1021/om200323c
日期:2011.6.27
The synthesis of novel sulfur-chelated ruthenium benzylidenes afforded latentcatalysts with a wider range of activities and new isomeric forms. A ruthenium complex with a tridentate ligand displayed latency for even one of the most reactive ROMP monomers, dicyclopentadiene, while a room temperature latent trifluoromethyl-substituted thioether derivative was shown to be the most active sulfur-chelated
Light- and Thermal-Activated Olefin Metathesis of Hindered Substrates
作者:Elisa Ivry、Alexander Frenklah、Yakov Ginzburg、Efrat Levin、Israel Goldberg、Sebastian Kozuch、N. Gabriel Lemcoff、Eyal Tzur
DOI:10.1021/acs.organomet.7b00677
日期:2018.1.22
metathesis reactions of tetra-substituted olefins were obtained by the S-chelated ruthenium precatalyst Tol-SCF3. Its reactivity in a series of benchmark olefin metathesis reactions was compared to previously reported Mes-SCF3 and a novel stericallycongested S-chelated complex, Dipp-SCF3. Tol-SCF3 is thus the first latent catalyst proven to be capable of promoting olefin metathesis of demanding substrates
Synthesis and Catalytic Properties of Sulfur-Chelated Ruthenium Benzylidenes Bearing a Cyclic (Alkyl)(amino)carbene Ligand
作者:Illya Rozenberg、Or Eivgi、Alexander Frenklah、Danielle Butilkov、Sebastian Kozuch、Israel Goldberg、N. Gabriel Lemcoff
DOI:10.1021/acscatal.8b02122
日期:2018.9.7
Sulfur-chelated ruthenium olefin metathesis precatalysts that possess cyclic (alkyl)(amino)carbenes (CAAC) can benefit from the synergetic effect of both ligands. Changing the steric bulk of the CAAC ligand by using different substitution patterns was shown to affect the geometry of the complexes produced and determined whether the complexes could be catalytically dormant. The cis-dichloro latent catalysts could