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CBZ6 , a redox-neutral non-donor-acceptor-type organo-photocatalyst, presents a strong reductive potential with an oxidative potential of -2.16 V (vs SCE). It can work as a photosensitizer for both single-electron transfer and triplet energy transfer processes. This feature enables site-selective control in the intramolecular hydroarylation of acrylamides. Both 5- exo -trig and 6- endo -trig cyclization products could be prepared regiospecfically under mild conditions. No transition metal, halogen-containing reagents, or additional reductant or oxidant is involved. This process provides a concise and environmentally sustainable access to a series of oxindoles and dihydroquinolinones.

A tandem isomerization- anti -Markovnikov oxidation of linear allylic imidic esters is developed using bis(benzonitrile)palladium chloride as the catalyst and O 2 as the sole oxidant, regiospecifically giving β-amino aldehydes as the product. tert -Butyl nitrite works as a simple, and the only, redox cocatalyst. t BuOH proves to be a crucial solvent for achieving excellent yield and specificity toward anti -Markovnikov aldehyde products.