The good yield of sulfoximine with 4-bromoanisole could indicate the involvement of dimethylsulfoximine in the oxidative addition (coordination of dimethylsulfoximine to nickel was observed in the NMR, Figure ). Increasing the steric hindrance of the aryl bromide with an ortho-cyano substituent was well tolerated with dimethylsulfoximine (35) but led to a noticeable yield reduction with para-fluoroaniline (36) as the nucleophile.