New chiral diphosphites derived from substituted 9,10-dihydroanthracene. Applications in asymmetric catalytic processes

Two novel diphosphite ligands derived from 9,10-dihydroanthracene originating from a 1,3-diol chiral fragment, have been prepared in high yields from readily available starting materials. Rhodium and palladium catalytic systems containing these new P-donor ligands led to 51% and 90% ee in asymmetric hydroformylation and allylic alkylation processes, respectively.

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