Photoinduced cycloadditions and cyclizations. Mechanistic studies and synthetic applications

Mattay J, Albrecht E, Fagnoni M, et al. Photoinduced cycloadditions and cyclizations. Mechanistic studies and synthetic applications. JOURNAL OF INFORMATION RECORDING. 1996;23(1-2):23-29.Synthetic applications and mechanistic studies from three areas of photoinduced cycloadditions and cyclizations are reported: First it is shown that unsaturated silyl enol ethers preferentially cyclisize in a 6-endo mode via their photochemically generated radical cations. In the following chapter we discuss fragmentation-cyclization reactions of unsaturated alpha-cyclopropyl ketones by photoinduced electron transfer leading to polycyclic compounds. Finally a kinetic and theoretical study of [2+3] cycloadditions of nitrile ylides generated from 2H-azirines is presented