Photochemistry of α-Diketones in Carbohydrates: Anomalous Norrish Type II Photoelimination and Norrish-Yang Photocyclization Promoted by the Internal Carbonyl Group
作者:Dimitri Alvarez-Dorta、Elisa I. León、Alan R. Kennedy、Angeles Martín、Inés Pérez-Martín、Concepción Riesco-Fagundo、Ernesto Suárez
DOI:10.1002/chem.201303843
日期:2014.2.24
regioselectivity of the hydrogen atom transfer (HAT) in Norrish typeII photochemical processes. We observed that the 1,5‐HAT regioselectivity can be switched between the two potentially abstractable syn‐1,3‐diaxial hydrogens at H6 and H8. Highly unusual photoproducts from Norrish typeIIphotoelimination and Norrish–Yang photocyclization initiated by the excited internal carbonyl group were obtained