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À propos de : Dendritic Oxazoline Ligands in EnantioselectivePalladium-Catalyzed Allylic Alkylations        

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  • Dendritic Oxazoline Ligands in EnantioselectivePalladium-Catalyzed Allylic Alkylations
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  • First to fourth generation dendritic substituents based on 2,2-bis(hydroxymethyl)propionic acidand (1R,2S,5R)-menthoxyacetic acid were attached to 2-(hydroxymethyl)pyridinooxazoline and bis[4-(hydroxymethyl)oxazoline] compounds. The new ligands obtained were assessed in palladium-catalyzed allylic alkylations. The first type of ligands exhibited enantioselectivity similar to thatof a benzoyl ester derivative, whereas the latter type of ligands afforded products with higherselectivity than the analogous benzoyl ester. The activity of the dendritic catalysts decreased withincreasing generation.
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