Over and over again: Various alkenes underwent the title reaction in the presence of rhodium/bis(diazaphospholane) complexes to give γ-chiral α,β-unsaturated carbonyl products (46–96 % yield) with high enantioselectivity (90–99 % ee). Iterative sequences of the reaction lead to stereoselective CC bond formations between achiral reactants to produce products having multiple stereocenters (see scheme, acac=acetylacetonate).
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