- Lipase-catalyzed acylation and deacylation reactions of pyridoxine, a member of vitamin-B6 group
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A series of acyloxy derivatives of pyridoxine (1) have been prepared by transesterification reactions of 1 and ethyl carboxylates, catalyzed by several lipases. Moreover, acetylated derivatives of 1 were selectively deacetylated by enzymatic catalysis in organic media.
- Baldessari, Alicia,Mangone, Constanza P.,Gros, Eduardo G.
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- MULTIBIOTIC AGENTS AND METHODS OF USING THE SAME
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Multibiotic agents are disclosed. The multibiotic agents may contain two or more moieties linked through bonds cleavable in vivo. The bonds cleavable in vivo can be ester bonds, amide bonds, azo bonds, glycosidic bonds, carbonate linkers, or carbamate linkers. The moieties can be alcohol cores, amine cores, and/or acyls. Also disclosed are compositions containing multibiotic agents and methods of using the multibiotic agents.
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Page/Page column 118
(2019/01/06)
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- METHODS FOR THE SYNTHESIS OF PYRIDOXAMINE
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The invention provides non-oxidative methods for the large scale manufacture of pyridoxamine (I) (4-aminomethyl-3-hydroxy-5-hydroxymethyl-2-methylpyridine): Formula (I), and salts thereof. The invention also provides intermediate compounds for the synthesis of pyridoxamine, as well as compositions and methods for the treatment and/or prevention of conditions associated with the formation of post-Amadori advanced glycation end-products.
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Page/Page column 34-35
(2008/06/13)
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- 1,3 DIHYDROFURO [3,4-c]PYRIDINES AND THEIR PREPARATION
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The present invention relates to novel 1,3-dihydrofuro[3,4-c]pyridines which are useful intermediates in the synthesis of pyridoxines and a method for their preparation by cobalt(I) complex-catalysed [2 + 2 + 2]-cycloaddition of di-[(3-dimethyl-C1-4-alkoxysilyl)-2-propynyl)] ethers with acetonitrile.
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Page/Page column 8
(2010/02/14)
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- Manufacture of pyridoxin
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An industrially advantageous process for the manufacture of vitamin B6 (pyridoxin) from 2-methyl-3-hydroxy-4,5-bis-(halomethyl)-pyridine, wherein the starting compound is first converted in the conventional manner to the corresponding pure acetoxy compound which is reacted with an alkali metal acetate, alkaline earth metal acetate or tertiary ammonium acetate to give pyridoxin triacetate, from which pyridoxin can be liberated by hydrolysis or trans-esterification.
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