Some Photochemical reactions leads to the generation of highly reactive species.
Albini proposes to exploit some methods his group recently devised for the formation of dienes and aryl cations by photolysis in liquid or supercritical carbon dioxide as well as in the presence of alkenes. Aromatics have been devised. In fact, because the PTC processes may afford excellent reaction selectivities and substantially quantitative yields by operating under mild conditions, they are economically very competitive. To this scope, the RU will also prepare new catalysts with peculiar structures to fit their application under the above outlined conditions. A limitation is that this is a relatively poor solvent, henee the effort towards two phases reactions.