Novel photoinduced cyclization of pentafluorophenylhemithioindigo

Photoirradiation of the pentafluorophenyl-substituted Z-hemithioindigo 1 causes a novel type of photoinduced cyclization, to produce the intramolecularly cyclized alcohol 2 and its dehydrated ether 3. For this photoinduced cyclization, the o-fluorine atoms of the phenyl group of 1 are found to be crucial.

Photoirradiation of 1 causes a novel type of photoinduced cyclization, to produce the intramolecularly cyclized alcohol 2 and its dehydrated ether 3, instead of the Z–E isomerized product.Figure optionsDownload as PowerPoint slide