Efficient recycling of a chiral palladium catalytic system for asymmetric allylic substitutions in ionic liquid |
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| Authors: | Favier Isabelle Castillo Angelica Balanta Godard Cyril Castillón Sergio Claver Carmen Gómez Montserrat Teuma Emmanuelle |
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| Institution: | Université de Toulouse, UPS, LHFA, 118 route de Narbonne, 31062 Toulouse, CNRS, LHFA UMR 5069, 31062 Toulouse, France. |
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| Abstract: | Chiral carbohydrate-based diphosphites were used for Pd-catalysed asymmetric allylic substitution (alkylation, amination, phosphination) in neat ionic liquids (ILs). Pyrrolidinium-based IL led to the best activities, allowing an efficient catalyst immobilization. In the allylic amination (TOF > 3100 h(-1)), the catalyst could be recycled nine times preserving both activity and enantioselectivity. |
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