Claisen rearrangement of aryl propargyl ethers in poly(ethylene glycol)- a remarkable substituent and solvent effect
作者:Usha Roa、K.K. Balasubramanian
DOI:10.1016/s0040-4039(01)99839-9
日期:1983.1
The Claisen rearrangement of aryl propargyl ethers in poly(ethylene glycol) - 200 at 200°C affords products in good yields. Aryl propargyl ethers containing electron donating groups yield (2H)-benzopyrans and those containing electron withdrawing groups yield 2-methylbenzofurans.
Recyclable ruthenium catalysts for metathesis reactions
申请人:Zhan James Zheng-Yun
公开号:US20070043180A1
公开(公告)日:2007-02-22
The invention relates to novel carbene ligands and their incorporated monomeric and resin/polymer linked ruthenium catalysts, which are recyclable and highly active for olefin metathesis reactions. It is disclosed that significant electronic effect of different substituted 2-alkoxybenzylidene ligands on the catalytic activity and stability of corresponding carbene ruthenium complexes, some of novel ruthenium complexes in the invention can be broadly used as catalysts highly efficient for olefin metathesis reactions, particularly in ring-closing (RCM), ring-opening (ROM), ring-opening metathesis polymerization (ROMP) and cross metathesis (CM) in high yield. The invention also relates to preparation of new ruthenium complexes and the use in metathesis.
RECYCLABLE RUTHENIUM CATALYSTS FOR METATHESIS REACTIONS
申请人:ZHAN Zheng-Yun James
公开号:US20100041844A1
公开(公告)日:2010-02-18
The invention relates to novel carbene ligands and their incorporated monomeric and resin/polymer linked ruthenium catalysts, which are recyclable and highly active for olefin metathesis reactions. It is disclosed that significant electronic effect of different substituted 2-alkoxybenzylidene ligands on the catalytic activity and stability of corresponding carbene ruthenium complexes, some of novel ruthenium complexes in the invention can be broadly used as catalysts highly efficient for olefin metathesis reactions, particularly in ring-closing (RCM), ring-opening (ROM), ring-opening metathesis polymerization (ROMP) and cross metathesis (CM) in high yield. The invention also relates to preparation of new ruthenium complexes and the use in metathesis.
Ruthenium complex ligand, ruthenium complex and the use of the complex as a catalyst in olefin metathesis reactions
申请人:Zannan Scitech Co., Ltd.
公开号:EP2886549A1
公开(公告)日:2015-06-24
The present invention disclosed a kind of ruthenium complex ligands, ruthenium complexes and immobilized ruthenium complex catalysts. The invention also relates to preparation and use of new ruthenium complex ligands and ruthenium complexes in metathesis reactions as catalysts have several significant advantages, e.g., high catalytic activity, high stability, easy recovery and reusability. The ruthenium complex ligand I and ruthenium complex II in the present invention have the following structures:
本发明公开了一种钌络合物配体、钌络合物和固定化钌络合物催化剂。本发明还涉及新型钌络合物配体和钌络合物的制备和在偏析反应中的使用,作为催化剂,新型钌络合物和钌络合物具有催化活性高、稳定性强、易于回收和重复使用等显著优点。本发明中的钌络合物配体 I 和钌络合物 II 具有如下结构: