Novel Biradical Cyclization via Remote-Hydrogen Transfer in Photochemistry of 2-Dialylaminoethyl 3-Benzoylacrylates

Article abstract of DOI:10.1246/bcsj.66.3128

Upon irradiation, 2-(N,N-dibenzylamino)ethyl and 2-(N-benzyl-N-methylamino)ethyl 3-benzoylacrylate underwent photocyclization via remote-proton transfer from their (Z)-forms competing with (E)-(Z) isomerization. The quantum yield for the cyclization under the conditions where both (E)- and (Z)-isomers absorb the irradiation light was estimated to be 0.05 by applying the steady-state approximation.