Redox-photosensitized Amination of Cyclopropanes

Abstract

Redox-photosensitized amination of arylcyclopropanes with ammonia using 1,2,4-triphenylbenzene as redox-photosensiter have been investigated. A key pathway for the photosensitized amination is the hole transfer from the cation radical of the sensitizer that were generated by photoinduced electron transfer to the electron acceptor to the substrates. It was found that the reaction yields were depending on both the difference in oxidation potentials between the substrates and the sensitizer and the positive charge distribution of the cation radicals of the substrates.