 The reaction is reported to be favorable in ethereal solvents.This method was proved to be very effective for the oxidative coupling of amines and alkyl, including tertbutyl, and aryl halides.Vicinal functionalization using a Carbocupration- Mukaiyama aldol reaction
sequence 

Muller and collaborators reported a vicinal functionalization of α,β- acetylenic esters using a Carbocupration/ Mukaiyama aldol reaction sequence (as shown in fig above) carbocupration favors the formation of the Z- aldol.