エステルカルボニル基の関与する分子内光環化付加-発色団の連結によるエステルカルボニル基の付加反応性の発現

概要

論文の詳細を見る
Phenanthrene- and naphthalenecarboxylic esters linked with styrene derivatives exert an intramolecular competitive or exclusive oxetane formation depending upon the linking chain length and site, although the carbonyl addition is not observed in the corresponding intermolecular systems. The reaction is a singlet process involving plural exciplexes. The photochemical and, photophysical observations as well as MO calculations indicate that the new aspect of carbonyl addition arises from an apparent enhancement of reactivity of the ester carbonyl group by interchromophoric link; the link destabilizes the exciplexes with conformations achieved in the intermolecular systems and therefore, the exciplexes preferable for carbonyl addition take an important role.
社団法人有機合成化学協会の論文