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
Tandem Copper-Catalyzed Enantioselective Allylation−Metathesis
作者:Alexandre Alexakis、Karine Croset
DOI:10.1021/ol0269244
日期:2002.11.1
Grignardreagents undergo enantioselective (up to 86% ee) copper-catalyzed S(N)2' substitution on achiral allylic chlorides. The reaction is wide in scope for both the Grignardreagent and the allylic substrate. The resulting terminal alkene could be submitted to intra- or intermolecular metathesis to afford newchiral synthons. The experimental conditions are compatible with a one-pot overall sub
[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.
Structural effects in solvolytic reactions. VI. Rates and products in the acetolysis of substituted trans-2-phenylcyclopentyl tosylates and optically active derivatives. Nature of the aryl-assisted and the aryl-unassisted reaction pathways