Bis(phosphite) Ligands with Distal Regulation: Application in Rhodium-mediated Asymmetric Hydroformylations

[摘要]：Small amounts of achiral polyether binders are employed to enhance the enantioselectivity of the hydroformylation of an array of diversely substituted substrates (increase of up to 62% ee for vinyl acetate) mediated by chiral rhodium complexes derived from the ,-bis(phosphite)polyether ligands 1. To the best of our knowledge, this study represents an unprecedented successful example of the positive regulation of enantioselectivity in hydroformylations.

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