The effect of TEMPO in the hydroxylation of benzene to phenol on the [(CH3)4N]4PMo11VO 40/ascorbic acid/TEMPO/O2 catalytic system: Formation of ascorbic acid radicals through hydrogen excha
Hydroxylation of benzene to phenol in the [(CH3) 4N]4PMo11VO40/ascorbic acid/TEMPO/O2 catalytic system was carefully investigated. UV-vis, ESR and 1H NMR studies showed ascorbic
Ozonolysis of enol ethers. Part 10. Ozonization of enol ethers from 1,2- and 1,3-dicarbonyl compounds: Direct quantitative synthesis of phthalonic acid anhydride
The results of ozonolyses of enol ethers from 1.2- and 1.3-dicarbonyl compounds presented here strongly indicate that these reactions do not proceed via the established Criegee ozonolysis mechanism for nucleophilic C=C bonds. The quantitative one-step synthesis of phthalonic acid anhydride via ozonolysis of 2-(methoxymethyliden)-1H-inden-1.3(2H)-dione (28a) is described. Furthermore, a revision of the theory of alkene ozonolysis in the presence of tetracyanoethylene (TCNE) is proposed on the basis of a single-electron-transfer (SET) chemistry.
Schank, Kurt,Beck, Horst,Pistorius, Susanne
p. 2025 - 2049
(2007/10/03)
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