Eine quantitative Korrektur des durch gefärbte Lösungen hervorgerufenen Quench-Effektes bei der Flüssigscintillationsmessung

Analytical and Bioanalytical Chemistry -     

Hydrogention and Oxidation of Allyl Alcohol in the Presence of Colloid Palladium In Situ

Kinetic regularities of hydrogenation, oxidation with oxygen, and condensation of allyl alcohol in the presence of colloid palladium in situ were revealed. A mechanism of the reactions was proposed.     

Reaction of 2-chloro-5-methylbenzoquinone with Β-aminocrotonic ester derivatives

The reaction of 2-chloro-5-methylbenzoquinone with -aminocrotonic ester derivatives was studied by PMR spectroscopy in CD₃COOD. The spectra indicate the formation of intermediate hydroquinone and quinone derivatives, which subsequently transform into the corresponding indoles. It was shown that the indolization proceeds unequivocally at the 3-position of the initial benzoquinone, and the rate of formation of the indole derivatives decreases with increase in the size of the substituent at the nitrogen atom of the -aminocrotonic ester. The starting, intermediate compounds and the end products observed in the PMR spectra were identified by comparison with specially synthesized compounds.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 324–328, March, 1990.     

Zur mikroanalytischen Bestimmung von Chlor in polymerisiertem und copolymerisiertem Vinylchlorid

Ohne Zusammenfassung     

Zur Bestimmung von Dihydroxypropyltheophyllin in pharmazeutischen Zubereitungen

Ohne Zusammenfassung