The chiral monodentate phosphane ligand (R)-MOP facilitated the first enantioselective nucleophilic 1,2-addition of an "unmasked" acyl anion to a carbonyl group in the Pd(II)-catalyzed reaction of alpha,beta-unsaturated ketones with acylzirconocene chlorides [Eq. (1), 66 % ee, 88 % yield; (R)-MOP=(R)-2-(diphenylphosphanyl)-2'-methoxy-1,1'-binaphthyl].
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Hanzawa et al. (1999) studied this question.