Photochemische Reaktionen. 51. Mitteilung [1]. Zur Photochemie von gesättigten β-Ketosulfiden III. Strukturaufklärung eines weiteren Photoproduktes Zusammenfassende Beurteilung des photochemischen Reaktionsbildes

Ultraviolet irradiation of the saturated β-ketosulfide 2 (charge-transfer)- or (n → π*)-excitation] in methanol or benzene solutions resulted in the formation of the products 4, 5a, 6 (due to α-cleavage) and 7 due to (C_α–S)-fission]. Compounds 4, 6 and 7 have been described earlier 1] 2]. The structure elucidation of 5a is reported in this paper. The photochemistry of the β-ketosulfide 2 is summarized.