CRYSTALLIZATION BEHAVIOUR AND INFRARED SPECTRUM OF POLYETHER-ESTER HOMOLOGS FROM HALOGENATED p-HYDROXYBENZOIC ACID
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چکیده
منابع مشابه
p-Hydroxybenzoic acid synthesis in Mycobacterium tuberculosis.
Glycosylated p-hydroxybenzoic acid methyl esters and structurally related phenolphthiocerol glycolipids are important virulence factors of Mycobacterium tuberculosis. Although both types of molecules are thought to be derived from p-hydroxybenzoic acid, the origin of this putative biosynthetic precursor in mycobacteria remained to be established. We describe the characterization of a transposon...
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In a previous report, the synthesis of p-hydroxybenzoic acid and salicylic acid from alkali phenoxides and carbon dioxide in aprotic-polar solvents was reported. In the present study, the effects of reaction conditions on the yields and the rule of orientation under atmospheric pressure were examined in a typical aprotic-polar solvent, N,N-dimethylfomamide. Stabilities of the alkali salts of p-...
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p-Aminobenzoic acid (PABA) exerts three metabolic effects on E. coli: it acts as a normal vitamin at low concentrations, as a source of another vitamin, p-hydroxybenzoic acid (POB), at moderate concentrations, and as a growth inhibitor at high concentrations (150 to 1600 microg./ml.). The inhibition is competitively reversed by POB in 1/100 the concentration of PABA. The inhibition is also reve...
متن کاملFarnesyl hydroxybenzoic acid derivatives from Ferula kuhistanica.
Four new farnesyl hydroxybenzoic acid derivatives, kuhistanols E-H (1-4), were isolated from the roots of the Uzbekistan medicinal plant Ferula kuhistanica. The structures of the new compounds were elucidated based on spectroscopic and chemical evidence.
متن کاملThe synthesis and biological evaluation of mycobacterial p-hydroxybenzoic acid derivatives (p-HBADs).
Mycobacterium tuberculosis establishes chronic infection and causes disease through manipulation of the host's innate and adaptive immune response. The bacterial cell wall is highly complex and contains a rich variety of glycosylated compounds that are secreted during infection and have been proposed as immunomodulatory molecules. Amongst the most important of these are the p-hydroxybenzoic aci...
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ژورنال
عنوان ژورنال: Sen'i Gakkaishi
سال: 1979
ISSN: 0037-9875,1884-2259
DOI: 10.2115/fiber.35.3_t105