Photocycloadditions of benzene derivatives and their systematic application to organic synthesis

Photocycloadditions of benzene derivatives with alkenes play an important role as key steps in organic synthesis. Intramolecular reactions have been most frequently studied this context. Often, meta or [2 + 3] photocycloadditions take place competition ortho 2] additions. The influence the substitution pattern and spin multiplicity excited state on outcome these is discussed. A topological analysis permitting a systematic application to total synthesis natural products presented selection corresponding syntheses More recently photocycloaddition consecutive rearrangements published. Some approaches context asymmetric also reported.