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Low temperature (-70 °С) ozonization of exo bicyclo[2.2.1]heptan 2 ol in CCl 3 F led to a hydrotrioxide, which was identified by 1 H NMR spectroscopy. Kinetics of decomposition of given hydrotrioxide was studied by analysis of the chemiluminescence fading in the IR range of the spectrum and the activation parameters of the process were calculated. Singlet oxygen ( 1 ∆ g ) served as an emitter of eradiation. Yields of 1 O 2 in a range of temperature from -31.0 to +12.5 °C were determined (at -31 °C the yield was 37.6%). Bicyclo[2.2.1]heptan 2 one was found to be the main product of decomposition of the hydrotrioxide (the yield was 98%).

The reactivity of 5-hydroxy-6-methyluracil (HMU) towards peroxyl radicals generated from the aerobic thermal decomposition of 2,2 -azo-bis(2-amidinopropane)dihydrochloride (AAPH) has been investigated. The oxidation product of HMU is dihydro-5,5,6-trihydroxy-6-methylpyrimidin-2,4-dion-e (94%). The relative oxidation rate of HMU vs. quercetin by peroxyl radicals generated from AAPH has been measured as 0.20 ± 0.04 at 54.6°C, hence HMU is the effective scavenger of peroxyl radicals. The overall kinetic parameters and the efficiency of radical generation from AAPH in water solution at pH 7.0 (0.1 M phosphate buffer) have been determined using HMU in temperature range 26° -84°C.

Successful application of dimethyldioxirane for selective oxidation of an oxygen-containing tertiary C atom to form a hemiacetal, the preparation of which is inaccessible by other methods, was demonstrated using dihydroquinopimaric acid derivatives as examples.

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