Tetraphenylporphyrin-sensitized photooxygenation of cycloheptatriene afforded the 1,2-dioxetane (3 ) in 9% yield, %% thus completing the set of possible cycloa dition products; the 1,2-dioxetane (&$ 1s the precursor to the benzaldehyde product, but not the (2+6)-cycloadduct (&).
1,2-dioxetanes as chemiluminescent intermediates in the triplet oxygen oxygenation of olefins.
โ Scribed by E.W. Meijer; Hans Wynberg
- Publisher
- Elsevier Science
- Year
- 1981
- Tongue
- French
- Weight
- 202 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0040-4039
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Tetraaryl -A2$2' -biimidazolidines (3) are stable compounds in the solid state. In solu, tion they react with triplet oxygen. In the presence of fluorescers chemiluminescence is observed. The intensity and lifetime of the chemiluminescence depends on the substituents at the aryl groups and on the so
We recently described the regioselective addition of singlet oxygen ('02) to various cyclopropylethylenes and reported easy cyclopropyl hydrogen abstractions (Ia> ; moreover with methoxy-substituted olefins we found a stereoselective control of the methoxy group which leads to a strong preference f