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Chemistry of singlet oxygen. Dye-sensitized photooxygenation of arylallenes

โœ Scribed by Ihsan Erden; Tomas R. Martinez

Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
315 KB
Volume
32
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

1-Arylallenes react with singlet oxygen via 1,Zand 1,4_cycloaddition modes giving rise to three types of carbonyl fragments. l,l-Diphenyl-and 1-methyl-1-phenylallenes react predominantly by the 1,4-mode. Plausible mechanisms are discussed for the formation of the observed products.

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Although it is well established that aliphatic amines may quench singlet oxygen,' it has recently been shown that certain amines did react with singlet oxygen to yield specific products.2c'3 There have been several reports of photooxygenation of amines, in which a-oxidation,3c,5 6-oxidation,6 dehydr