作者:Tamar Kost、Mark Sigalov、Israel Goldberg、Amos Ben-Asuly、N. Gabriel Lemcoff
DOI:10.1016/j.jorganchem.2008.03.028
日期:2008.6
A series of sulfur chelated dormant ruthenium olefin metathesis catalysts is presented. The catalysts prepared were shown to possess the uncommon cis-dichloro arrangement and were mostly inactive at room temperature. By systematically modifying the size of the substituent groups at the chelating sulfur atom, catalyst activity at different temperatures was significantly affected; more bulky substituents
Sulfur chelated ruthenium compounds useful as olefin metathesis catalysts
申请人:Lemcoff Gabriel N.
公开号:US20090156766A1
公开(公告)日:2009-06-18
Sulfur chelated ruthenium compounds and methods and compositions involving the same. A method may relate to subjecting an olefin to a metathesis reaction in the presence of a sulfur chelated ruthenium compound. A composition may relate to an olefin starting material dissolved in an organic solvent together with a sulfur chelated ruthenium compound.
New latent metathesis catalysts equipped with exchangeable boronic ester groups on the NHC
作者:Revannath Sutar、Danielle Butilkov、N. Gabriel Lemcoff、Ofer Reany
DOI:10.1080/00958972.2018.1481211
日期:2018.7.3
Abstract 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
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