作者:Cédric Theunissen、Melissa A. Ashley、Tomislav Rovis
DOI:10.1021/jacs.8b13663
日期:2019.5.1
development of a new system to achieve visible-light-controlled metathesis by merging olefinmetathesis and photoredox catalysis. The combination of a ruthenium metathesis catalyst bearing two N-heterocyclic carbenes with an oxidizing pyrylium photocatalyst affords excellent temporal and spatial resolution using only visible light as stimulus. Applications of this system in synthesis, as well as in polymer
Compositions And Methods For Visible-Light-Controlled Ruthenium-Catalyzed Olefin Metathesis
申请人:The Trustees of Columbia University In The City of New York
公开号:US20200108381A1
公开(公告)日:2020-04-09
The present disclosure provides compositions and methods for metathesizing a first alkenyl or alkynyl group with a second alkenyl or alkynyl group, the composition comprising a ruthenium metathesis catalyst and a photoredox catalyst that is activated by visible light.
Highly Robust and Efficient Blechert-Type Cyclic(alkyl)(amino)carbene Ruthenium Complexes for Olefin Metathesis
作者:Antonio Del Vecchio、Jakub Talcik、Sophie Colombel-Rouen、Jan Lorkowski、Melinda R. Serrato、Thierry Roisnel、Nicolas Vanthuyne、Guy Bertrand、Rodolphe Jazzar、Marc Mauduit
DOI:10.1021/acscatal.3c01208
日期:2023.5.5
catalytic performances at low catalytic loading (up to 0.005 mol %) in ring-closingmetathesis (RCM), macro-RCM, ring-closingenynemetathesis (RCEYM), cross-metathesis (CM), ethenolysis and ring-opening crossmetathesis (ROCM). Moreover, up to 95% enantiomeric excess (ee) was obtained in asymmetric ring-opening crossmetathesis (AROCM) and 57% ee was obtained in asymmetric cross-metathesis (ACM).
Cyclic (amino)(barrelene)carbene Ru-complexes: synthesis and reactivity in olefin metathesis
作者:Jakub Talcik、Melinda R. Serrato、Antonio Del Vecchio、Sophie Colombel-Rouen、Jennifer Morvan、Thierry Roisnel、Rodolphe Jazzar、Mohand Melaimi、Guy Bertrand、Marc Mauduit
DOI:10.1039/d4dt00102h
日期:——
The synthesis of ruthenium-complexes with cyclic (amino)(barrelene)carbenes (namely CABCs) as ligands is reported. Isolated in moderate to good yields, these new complexes showed impressive thermal stability at 110 °C over several days. Good catalytic performances were demonstrated in various ring-closing metathesis (RCM), macrocyclic–RCM, ring-closing enyne metathesis (RCEYM), cross-metathesis (CM)
报道了以环状(氨基)(桶烯)卡宾(即CABCs)作为配体合成钌配合物。这些新配合物以中等至良好的产率分离,在 110 °C 的几天内表现出令人印象深刻的热稳定性。在各种闭环复分解(RCM)、大环-RCM、闭环烯炔复分解(RCEYM)、交叉复分解(CM)和开环交叉复分解(ROCM)反应中均表现出良好的催化性能。
NANOPOROUS LINEAR POLYOLEFIN MEMBRANES AND BLOCK COPOLYMER PRECURSORS FOR SAME
申请人:Regents of the University of Minnesota
公开号:US20150210821A1
公开(公告)日:2015-07-30
A composition comprising a block copolymer that includes at least one polyester block and at least one linear polyolefin block, wherein the composition is in the form of a nano-structured, bicontinuous composite that includes a continuous matrix phase and a second continuous phase. The continuous matrix phase comprises the linear polyolefin block of the block copolymer, and the second continuous phase comprises the polyester block of the block copolymer. The composite may be treated to remove the polyester block, thereby forming a plurality of nano-pores.