Chiral P,N-Ligands Based on Ketopinic Acid in the Asymmetric Heck Reaction
作者:Scott R. Gilbertson、Zice Fu
DOI:10.1021/ol006747b
日期:2001.1.1
[figure: see text] Novel chiral P,N-ligands were synthesized from (1S)-(+)-ketopinic acid using palladium-catalyzedcouplingreaction of a vinyl triflate and either a diarylphosphine or a dialkylphosphine as the key step. Palladium complexes of these ligands are efficient catalysts for asymmetric Heck reaction between aryl or alkenyl triflates and cyclic alkenes. Products were obtained with good to
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
Palladium-catalyzed asymmetric arylation of 4,7-dihydro-1,3-dioxepin. Catalytic asymmetric synthesis of γ-butyrolactone derivatives
作者:Yuichi Koga、Mikiko Sodeoka、Masakatsu Shibasaki
DOI:10.1016/0040-4039(94)88030-1
日期:1994.2
The palladium-catalyzedasymmetric arylation of 4,7-dihydro-1,3-dioxepin 1d has been shown to give 2d-h (up to 75% ee), which can be readily converted to γ-butyrolactone derivatives. The important role of molecular sieves in the asymmetric Heck reaction has been also clarified.
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
An efficient phosphorus-containing oxazoline ligand derived from cis -2-amino-3,3-dimethyl-1-indanol: application to the palladium-catalyzed asymmetric Heck reaction
Enantiopure 2-[2-(diphenylphosphino)phenyl]oxazoline, derived from a non-natural chiral aminoalcohol, cis-2-amino-3,3-dimethyl-1-indanol, was found to be an efficientligand for the palladium-catalyzed asymmetric Heckreaction.