Zobrazeno 1 - 10
of 68
pro vyhledávání: '"HASSAN S. EL KHADEM"'
Autor:
Hassan S. El Khadem, Bruce Coxon
Publikováno v:
Carbohydrate Research. 337:2161-2170
Cyclobutenedione phenylazo-phenylamines were found to exhibit bathochromic shifts in acidic media and hypsochromic shifts in basic media, like phenylazo-phenylhydrazones. The bathochromic shifts are due to the formation of resonance-stabilized cation
Publikováno v:
Journal of Carbohydrate Chemistry. 14:429-437
A reliable liquid chromatographic method has been developed for the separation, identification and estimation of the products formed when saccharides are oxidized in alkaline solution with oxygen. The technique was then used to quantitatite the acids
Publikováno v:
Carbohydrate Research. 239:85-93
The reaction of squaric acid ( 1 ) with phenylhydrazine yields cyclobutanetetraone poly(phenylhydrazones) ( 2–4 ), as reported earlier, as well as squaric acid derivatives, reported here. The latter products are a salt, 1,3-dianilinocyclobutenediyl
Publikováno v:
ChemInform. 31
Publisher Summary This chapter provides an overview of the hydrazine derivatives of carbohydrates and related compounds. Hydrazine, hydroxylamine, and hydrogen peroxide are highly reactive nucleophiles that add to carbonyl compounds to give N - and O
Publikováno v:
ChemInform. 32
Six cyclobutanetetraone poly(arylhydrazones) have been treated with acids and bases, and the structures of the resulting anions and cations studied by UV-Vis absorption and NMR spectroscopy. In acid media, all the hydrazones studied formed cations, w
Publikováno v:
Carbohydrate Research. 224:327-330
Autor:
Hassan S. El Khadem
Publikováno v:
Carbohydrate Research. 313:255-257
The first step in the proposed mechanism is the formation of an osazone–Cu(II) complex that undergoes a one-electron shift from the nitrogen of the ligand to the metal in the complex which is reduced to Cu(I). This complex decomposes with the liber
Publikováno v:
ChemInform. 37
Publikováno v:
Advances in carbohydrate chemistry and biochemistry. 59
Publikováno v:
Advances in Carbohydrate Chemistry and Biochemistry ISBN: 9780120072590
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfa16db38874862139e5b3dc4bad76bf
https://doi.org/10.1016/s0065-2318(04)59004-2
https://doi.org/10.1016/s0065-2318(04)59004-2