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PHOTOSENSITIZED OXYGENATION OF CARBONYL STABILIZED SULFUR AND PYRIDINIUM YLIDS, AND RELATED DIAZO COMPOUNDS. CARBON‐SULFUR AND NITROGEN BOND CLEAVAGES
Author(s) -
Ando Wataru,
Kohmoto Shiceo,
Miyazaki Hajimc,
Nishizawa Kyojun,
Tsumaki Hidetoshi
Publication year - 1979
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1979.tb07118.x
Subject(s) - chemistry , pyridinium , singlet oxygen , sulfoxide , photochemistry , sulfur , diazo , sulfide , dioxetane , singlet state , oxygen , medicinal chemistry , organic chemistry , chemiluminescence , physics , nuclear physics , excited state
— The dye sensitized photooxygenation of sulfur and pyridinium ylids proceeds by way of singlet oxygen under the reaction conditions studied. The most remarkable results were that dimethyl sulfoxide and pyridine were obtained in the photooxygenations of oxosulfonium and pyridinium methy‐lids, respectively. as the major cleavage products. These results suggested that the 1,2‐dioxetane like intermediates were not significant ones in these reactions. The oxygenation reactions in the presence of diphenyl sulfide which was known as the most unreactive one to singlet oxygen afforded diphenyl sulfoxide efficiently. A new type of intermediate instead of 1,2‐dioxetane. that can monooxygenate the substrate may be formed. Photosensitized oxygenations of corresponding diazo compounds were also studied.