Dinickel-Catalyzed N=N Coupling Reactions for the Synthesis of Hindered Azoarenes.

Azoarenes are the largest class of photoswitching molecules, and they have a broad range of applications in photopharmacology and materials science. Azoarenes possessing -substitution often display improved properties, including isomerization under visible light irradiation, near-quantitative switching, and long thermal half-lives in the form. The synthesis of hindered -substituted azoarenes is often low-yielding using established oxidative or reductive coupling methods.