Entry to Tertiary Carbinamines Bearing a gem-Diaryl Group by Copper-Catalyzed Grignard Addition to Cyclic Sulfamidate Imines.

We report a convenient access to tertiary carbinamines bearing a gem-diaryl group by Cu-catalyzed aryl Grignard addition to cyclic sulfamidate imines and sulfamide imines. The synthesis of hetero-functionalized 1,2-ethylene derivatives by ring-opening of the resulting sulfamidates is also described.