This paper describes a mild strategy for amination of aryl halides with anilines by dual photoredox and nickel catalysis. In-expensive and commercially available thioxanthen-9-one significantly accelerated this cross-coupling, providing a diverse range of diarylamines in good yields (41-93%) at room temperature. This reaction proceeded under CFL or sunlight irradiation and was tolerant of a wide range of functional groups. It was applied to the synthesis of natural product and drug molecules, and proceeded efficiently on a gram-scale. The mechanism involves oxidative addition of an aryl halide to nickel(0), transmetalation of aryl-Ni(II) halide, energy transfer from triplet photosensitizer thioxanthen-9-one to an aryl-Ni(II)-amino intermediate, and subsequent reductive elimination to diarylamine.

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