کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1324766 | 977354 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Regioselectivity and memory effects in palladium catalyzed allylic alkylations with bidentate P^PS donor ligands Regioselectivity and memory effects in palladium catalyzed allylic alkylations with bidentate P^PS donor ligands](/preview/png/1324766.png)
A series of complexes, [Pd(η3-C3H5)(P^PS)][SbF6], where P^PS are bidentate bisphosphine monosulfide ligands, were found to catalyze allylic alkylation reactions with high branched:linear selectivity with some ligands. Some of these catalysts also display a regiochemical memory effect, in which the hemilability and rigidity of the P^PS ligands affect the reaction rate and the degree to which a memory effect is observed.
A series of complexes, [Pd(η3-C3H5)(P^PS)][SbF6], where P^PS are bidentate bisphosphine monosulfide ligands, were found to catalyze allylic alkylation reactions with high branched:linear selectivity with some ligands. Some of these catalysts also display a regiochemical memory effect, in which the hemilability and rigidity of the P^PS ligands affect the reaction rate and the degree to which a memory effect is observed.Figure optionsDownload as PowerPoint slideResearch highlights
► [Pd(η3-C3H5)(P^PS)][SbF6] complexes catalyze the allylic alkylation of carbonates with unusually high selectivity for addition to the substituted allylic terminus.
► P^PS ligands forming larger rings gave increased branched selectivity and furthermore, ligand backbone flexibility increased the rate of the reaction.
► There is a significant memory effect observed with a number of P^PS ligands.
► Low temperatures increased the regioselectivity and the magnitude of memory effects.
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 4, 15 February 2011, Pages 879–886