Chemistry Letters p. 545 - 546 (1995)
Update date:2022-08-25
Topics:
Nojima, Takayuki
Ishiguro, Katsuya
Sawaki, Yasuhiko
Product ratios of N2/N2O as an indicator for carbonyl oxide formation in the 1O2 oxygenation of phenyl diazomethanes were not affected by protic solvents but were significantly increased by electron-donating substituents.A mechanism is suggested in which 1,2,3,4-dioxadiazole intermediates are formed by the cycloaddition of 1O2 and diazomethanes and its cycloreversion is controlled by the relative stability of resulting carbonyl oxides.
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