Photoinduced Palladium Negishi Cross-Coupling Through Visible Light Absorption of Palladium-Organozinc complexes

• Irini Abdiaj ^a
• Lena Huck ^a,b
• José Miguel Mateo ^b
• Antonio de la Hoz ^b
• M. Victoria Gomez ^c
• Angel Díaz-Ortiz ^b
• Jesús Alcázar ^a

• ^a Lead Discovery, Janssen Research and Development, Janssen-Cilag, S.A., Jarama 75A, 45007 Toledo, Spain
• ^b Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Av. Camilo José Cela 10, 13071 Ciudad Real, Spain
• ^c Instituto Regional de Investigación Científica Aplicada, Universidad de Castilla-La Mancha, Av. Camilo José Cela, sn, 13071 Ciudad Real, Spain

A visible‐light‐induced Negishi cross‐coupling is enabled by the activation of a Pd0–Zn complex. With this photocatalytic method, the scope of deactivated aryl halides that can be employed in the Negishi coupling was significantly expanded. NMR experiments conducted in the presence and absence of light confirmed that the formation of the palladium–zinc complex is key for accelerating the oxidative addition step.

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