[Pd/Base/QX] catalyst systems for directing Heck-type reactions
摘要:
Palladium-catalyzed arylation of 2,3-dihydrofuran can be directed at will by an appropriate selection of the [Pd/Base/QX] catalyst systems, (C) 1998 Elsevier Science Ltd. All rights reserved.
Asymmetric Intermolecular Heck Reaction of Aryl Halides
作者:Chunlin Wu、Jianrong Zhou
DOI:10.1021/ja412277z
日期:2014.1.15
The asymmetric intermolecular Heckreaction has been limited to aryl and vinyl triflates. Herein, we extend the reaction to aryl and vinyl bromides. Various cyclic olefins coupled with high enantioselectivity. Only bisphosphine oxides on a spiro backbone formed highly stereoselective Pd catalysts. The use of alcoholic solvents and alkylammonium salts were essential to promote halide dissociation from
Biaryl Phosphite-Oxazoline Ligands from the Chiral Pool: Highly Efficient Modular Ligands for the Asymmetric Pd-Catalyzed Heck Reaction
作者:Javier Mazuela、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/chem.200902777
日期:2010.3.15
A highly modular library of readily available phosphite–oxazoline ligands L1–L21 a–g was successfully applied in the asymmetric Pd‐catalyzed Heck reactions of several substrates and triflates under thermal and microwave conditions. This ligandlibrary contains three main ligand structures that have been designed by systematic modification of one of the most successful ligand families developed for
[EN] SPIRO-1,1'-BIINDANE-7,7-BISPHOSPHINE OXIDES AS HIGHLY ACTIVE SUPPORTING LIGANDS FOR PALLADIUM-CATALYZED ASYMMETRIC HECK REACTION<br/>[FR] OXYDES DE SPIRO-1,1'-BIINDANE-7,7-BISPHOSPHINE COMME LIGANDS DE SUPPORT HAUTEMENT ACTIFS POUR UNE RÉACTION DE HECK ASYMÉTRIQUE CATALYSÉE PAR DU PALLADIUM
申请人:UNIV NANYANG TECH
公开号:WO2014196930A1
公开(公告)日:2014-12-11
The present invention relates to catalyst complexes comprising palladium (Pd) and at least one spiro-1,1 '-biindane-7,7'- bisphosphine oxide ligand as disclosed herein, and their use. The present invention is further directed to the asymmetric Pd-catalyzed covalent carbon-carbon single bond formation from aryl, heteroaryl and alkenyl triflates and halides and olefins utilising the said catalyst complexes.
Screening of a Modular Sugar-Based Phosphite–Oxazoline Ligand Library in Asymmetric Pd-Catalyzed Heck Reactions
作者:Yvette Mata、Oscar Pàmies、Montserrat Diéguez
DOI:10.1002/chem.200601714
日期:2007.4.16
We have synthesised a library of phosphite-oxazolineligands derived from readily available D-glucosamine. These ligands have been successfully screened in the palladium-catalysed Heckreaction of several substrates with high regio- (up to 99 %) and enantioselectivities (ee's up to 99 %) as well as with improved activities under standard thermal conditions. The results indicate that the catalytic performance
Phosphite-oxazole/imidazoleligands in asymmetric intermolecular Heck reaction
作者:Javier Mazuela、Paivi Tolstoy、Oscar Pàmies、Pher G. Andersson、Montserrat Diéguez
DOI:10.1039/c0ob00656d
日期:——
We describe the application of a new class of ligands –the phosphite-oxazole/imidazole (L1–L5a–g) – in asymmetricintermolecular Pd-catalyzed Heck reactions under thermal and microwave conditions. These ligands combine the advantages of the oxazole/imidazole moiety with those of the phosphite moiety: they are more stable than their oxazoline counterparts, less sensitive to air and other oxidizing agents