Communications The Effects of Media on the Intramolecular Photocycloaddition of 3-(3-Butenyl)cyclohex-2-enone

Department of Science Education, Chongju National University of Education, Chongju 361-150, KoreaReceived December 27, 1997Although the [2+2] photocycloaddition of enone to alk-ene is one of the most widely used photochemical reactions,several aspects on the mechanism and the factors in con-trolling the regiochemistry have not been understood.