Microextraction of 17-β-Estradiol from Medicinal Preparations for the Subsequent Determination by HPLC-UV

Journal of Analytical Chemistry - A method is proposed for the chromatographic determination of 17-β-estradiol in medicinal preparations with the microextraction of the analyte from a sample...     

Rate Constants of the Interaction of 2-Thio-6-Aminouracil with Peroxyl Radicals

Kinetics and Catalysis - It was shown that 2-thio-6-aminouracil (TAU) is an inhibitor of the radical-chain oxidation of ethylbenzene and methyl oleate. The reactivity of structurally different...     

Antioxidant Activity of Methano- and Cyclopentenofullerenes

Kinetics and Catalysis - The rate constant of the reaction of methano- and cyclopentenofullerenes (С60R) with a peroxyl radical (PhCH(OO?)CH3) was measured in a model system of the...     

Varying surface morfology of oxide-carbonate ores in the synthesis of an adsorbent catalyst

Investigation of the surface morphology of oxide-carbonate manganese ore and dolomite and also adsorbent catalyst samples synthesized on their basis showed that heat treatment of ores resulted in variation of their qualitative composition, surface state, and hardening their structure.     

Antioxidant Activity of 2-Aminothiazoles Containing a Diterpene Fragment in the Model System of the Liquid-Phase Radical-Chain Oxidation of 1,4-Dioxane

The antioxidant activity of 2-aminothiazoles containing a diterpene fragment in a model system of initiated radical-chain oxidation of 1,4-dioxane was evaluated. The compounds exhibited different inhibitory activities depending on their structure. The effective rate constant of the interaction of substituted 2-aminothiazoles with the 1,4-dioxane peroxyl radical was measured. 2-Aminothiazoles obtained by the chemical transformations of maleopimaric acid N-phenylamide showed higher reactivity with the peroxyl radical.     

Reaction of trichloroacetyl isocyanate with some β-diketones

Conclusions Benzoylacetone and 2-acetyl-1-cyclopentanone react in the enolic forms with trichloroacetyl isocyanate to give the corresponding O-addition products, which then rearrange to the C-addition products.Translated from Izvesitya Akademii Nauk SSSR; Seriya Khimicheskaya, No. 4, pp. 888–892, April, 1980.