15069-92-8Relevant articles and documents
A METHOD OF PRODUCING 5-HYDROXYPYRIDINE-2-CARBOXYLIC ACID FROM ALGINATE
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Page/Page column 22-23, (2012/11/06)
The present application provides methods for converting alginate into 5-hydroxypyridine- 2-carboxylic acid (5-HPA) using an alginate lyase and a recombinant oligoalginate lyase. The alginate lyase breaks down alginate into oligoalginate. The oligoalginate lyase breaks down the oligoalginate into monomers such as 4-deoxy-L-erythro-hexoseulose uronate (DEHU), which serves as a precursor for conversion into 5-HPA. The addition of ammonia or an ammonium ion further drives the conversion of DEHU into 5-HPA.
The preparation of Some 4- and 5-Substituted Pyridine-2-carboxylic Acids as Fusaric Acid Analogues.
Oehlke, J.,Schroetter, E.,Dove, S.,Schick, H.,Niedrich, H.
, p. 591 - 596 (2007/10/02)
In view of future studies on the structure-activity relationships involved in the inhibition of dopamine β-hydroxylase, the authors synthetized 5-substituted picolinic acids and 4-substituted fusaric acids selected by means of a random sampling procedure suited for small series.On this occasion, they succeeded in improving markedly the well-known synthesis of 5-nitropicolinic acid via a Rosenmund-v.Braun reaction with 2-bromo-5-nitropyridine. 5-Hydroxypicolinic acid which is easily accessible in the same way could be converted into 5-alkyloxypicolinic acids by reaction with alkyl halides in DMSO in the presence of silver oxide. 4-Substituted fusaric acids became accessible via 5-n-butyl-2-methyl-4-nitropyridine-N-oxide.
