PHOTOCHEMICAL REACTION OF 2-AROYL- 3-ARYLNORBORNADIENES

Abstract

Abstract Irradiation of 2-aroyl-3-arylnorbornadiene derivatives (1) afforded the corresponding quadricyclane derivatives (2) in good chemical yields and with excellent efficiencies (Φ=0.3–0.6). The quadricyclanes were converted to the original norbornadienes by treatment with trifluoroacetic acid, silver perchlorate, and silica gel, or by heating.