Corrigenda - Hydroxamic acids. II. The acetylation of O-alkylhydroxamic acids
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چکیده
منابع مشابه
Theoretical Studies on Hydroxamic Acids
Hydroxamic acids find many applications in chemistry and biology and have been the subject of many experimental investigations. Theoretical studies are not as frequent. However, the smallest homolog, formohydroxamic acid (FHA), has been studied at various levels, including high-level ab initio and density functional with large basis sets. All studies indicate that it exists as the Z-amide tauto...
متن کاملPhysiological role of the cyclic hydroxamic acids
Roots of young seedleings of barnyard grass, maize, rye and wheat secret hydroxamic acids. Their compexes with Fe/III/-ions are available sources of iron. It is possible that the cyclic hydroxamic acids play a role in the alternative mechanism of iron uptake. The hydroxamic acids secreted by barnayard grass roots have an allelopathic role by inhibiting the roots growth of rice. Acta Biol Szeged...
متن کاملO-acetylation and de-O-acetylation of sialic acids in human colorectal carcinoma.
A decrease in the level of O-acetylated sialic acids observed in colorectal carcinoma may lead to an increase in the expression of sialyl Lewis(X), a tumor-associated antigen, which is related to progression of colorectal cancer to metastasis. The underlying mechanism for this reduction is, however, not fully understood. Two enzymes are thought to be primarily responsible for the turnover of O-...
متن کاملO-acetylation and de-O-acetylation of sialic acids. Purification, characterization, and properties of a glycosylated rat liver esterase specific for 9-O-acetylated sialic acids.
We have previously described the preparation and use of 9-O-[acetyl-3H]acetyl-N-acetylneuraminic acid to identify sialic acid O-acetylesterases in tissues and cells (Higa, H. H., Diaz, S., and Varki, A. (1987) Biochem. Biophys. Res. Commun. 144, 1099-1108). All tissues of the adult rat showed these activities, with the exception of plasma. Rat liver contained two major sialic acid esterases: a ...
متن کاملAntioxidant activity of NSAID hydroxamic acids.
In the present study, seven hydroxamic acid derivatives of nonsteroidal anti-inflammatory drugs (NSAIDs) (ibuprofen, fenoprofen, ketoprofen, indomethacin and diclofenac) were found to possess significant antioxidant, radical scavenging and metal chelating activities. The most active antioxidant and radical scavenger was N-methylhydroxamic acid of diclofenac (ANT = 88.0% and EC50 = 60.1 microg m...
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ژورنال
عنوان ژورنال: Australian Journal of Chemistry
سال: 1969
ISSN: 0004-9425
DOI: 10.1071/ch9690161c