Long-Range Triplet Hydrogen Abstraction. Photochemical Formation of 2-Tetralols from β-Arylpropiophenones
The four ketones β-(o-tolyl)- and β-mesitylpropiophenone and -isobutyrophenone all undergo photocyclization to 2-tetralols via triplet-state ε-hydrogen abstraction.The intermediate 1,6-biradicals cyclize in 100percent efficiency.The triplets react in very