Scheme 3. Scope of 1,1-disubstituted aryl alkenes for ketone addition.^{a a}The same conditions as in Table 1; yield refers to the combined yield of two diastereomers, see the ESI† for details. ^bOne equivalent of alkene and two equivalents of ketone were used. ^cYield of the major diastereomer after oxidation with NaBO₃·4H₂O. ^dYield of the major diastereomer. ^e6h was used as the ligand.