Cyclic aldimines, enantioselective addition

Addition of an allylic zinc reagent to cyclic aldimines has been reported129. Lithiated bisoxazoline 61 and allylzinc reagent form the reactive species, which adds to a cyclic aldimine enantioselectively with up to 97.5% (equation 29)129. 

The enantioselective vinylogous Mukaiyama—Michael addition of 2-silyloxyfurans to cyclic unsaturated oxo esters afforded a variety of compounds bearing a y-butenolide or y-lactone connected to a cycloalkane or cycloalkene moiety (13JOC2289). The reaction of siloxyfurans with aromatic aldimines could be catalyzed efficiently by silver(I) complexes of the Ar-BlNMOL-derived chiral monophosphine (13T8777). 

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