S. Kohmoto et al., PHOTOSPECIFIC CLEAVAGE OF ONE OF THE CYCLOPROPYL SIGMA-BONDS OF VINYLNORCARADIENES, Chemical communications, (20), 1997, pp. 1973-1974
The benzophenone sensitised photochemical reaction of vinylnorcaradien
e derivatives 1, -1-enyl)3-oxatricyclo[4.4.0.0(1,5)]deca-7,9-dien-4 re
sulted in the regioselective cleavage of one of the cyclopropyl sigma-
bonds to afford the isochroman-3-one derivatives 7.