Reactions of p-Hydroxybenzyl Alcohol Derivatives and Their Methyl Ethers with Molecular Chlorine1

1960 ◽  
Vol 25 (5) ◽  
pp. 715-720 ◽  
Author(s):  
K. V. SARKANEN ◽  
C. W. DENCE
Keyword(s):  
Hydroxybenzyl Alcohol

Mechanism of hydration and isomerisation of 4-ethylidene-2,6-di-tert-butyl-2,5-cyclohexadien-1-one. Kinetics, acid-base catalysis and solvent deuterium isotope effects

1979 ◽  
Vol 44 (1) ◽  
pp. 110-122 ◽  
Author(s):  
Jiří Velek ◽  
Bohumír Koutek ◽  
Milan Souček
Keyword(s):  
Aqueous Medium ◽  
Rate Equation ◽  
Kinetic Data ◽  
Isotope Effects ◽  
Base Catalysis ◽  
Quinone Methide ◽  
Reaction Products ◽  
Acid Base ◽  
Deuterium Isotope Effects ◽  
Hydroxybenzyl Alcohol

Competitive hydration and isomerisation of the quinone methide I at 25 °C in an aqueous medium in the region of pH 2.4-13.0 was studied spectrophotometrically. The only reaction products in the studied range of pH are 4-hydroxybenzyl alcohol (II) and 4-hydroxystyrene (III). The form of the overall rate equation corresponds to a general acid-base catalysis. The mechanism of both reactions for three markedly separated pH regions is discussed on the basis of kinetic data and solvent deuterium effect.

scholarly journals Structural Characterization of a Polysaccharide from Gastrodia elata and Its Bioactivity on Gut Microbiota

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4443
Author(s):  
Jiangyan Huo ◽  
Min Lei ◽  
Feifei Li ◽  
Jinjun Hou ◽  
Zijia Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Citric Acid ◽  
Gut Microbiota ◽  
Structural Characterization ◽  
Hot Water ◽  
Nmr Analysis ◽  
Gastrodia Elata ◽  
Hot Water Extraction ◽  
Hydroxybenzyl Alcohol

A novel homogeneous polysaccharide named GEP-1 was isolated and purified from Gastrodia elata (G. elata) by hot-water extraction, ethanol precipitation, and membrane separator. GEP-1, which has a molecular weight of 20.1 kDa, contains a polysaccharide framework comprised of only glucose. Methylation and NMR analysis showed that GEP-1 contained 1,3,6-linked-α-Glcp, 1,4-linked-α-Glcp, 1,4-linked-β-Glcp and 1,4,6-linked-α-Glcp. Interestingly, GEP-1 contained citric acid and repeating p-hydroxybenzyl alcohol as one branch. Furthermore, a bioactivity test showed that GEP-1 could significantly promote the growth of Akkermansia muciniphila (A. muciniphila) and Lacticaseibacillus paracasei (L.paracasei) strains. These results implied that GEP-1 might be useful for human by modulating gut microbiota.

4-Hydroxybenzyl alcohol: A novel inhibitor of tumor angiogenesis and growth

Life Sciences ◽  
2013 ◽  
Vol 93 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Matthias W. Laschke ◽  
Antonia E. Vorsterman van Oijen ◽  
Christina Körbel ◽  
Claudia Scheuer ◽  
Michael D. Menger
Keyword(s):  
Tumor Angiogenesis ◽  
Hydroxybenzyl Alcohol

A germacranolide and three hydroxybenzyl alcohol derivatives fromHieracium murorumandCrepis bocconi

2001 ◽  
Vol 12 (4) ◽  
pp. 281-285 ◽  
Author(s):  
Christian Zidorn ◽  
Ernst P. Ellmerer-Müller ◽  
Hermann Stuppner
Keyword(s):  
Hydroxybenzyl Alcohol

Intrinsic limitations on the continued production of the antibiotic patulin by Penicillium urticae

1981 ◽  
Vol 27 (2) ◽  
pp. 206-215 ◽  
Author(s):  
Justin Neway ◽  
G. Maurice Gaucher
Keyword(s):  
Time Scale ◽  
Submerged Cultures ◽  
Cellular Content ◽  
Hydroxybenzyl Alcohol

The initial cause of the cessation of patulin biosynthesis in submerged cultures of Penicillium urticae was sought. The extrinsic limitations to patulin biosynthesis in fermentor cultures were successfully removed and kinetic profiles of the metabolites of the pathway and of three pathway enzymes were determined over a 60-h period. These profiles indicated that the first intrinsic limitation involved a decrease in the cellular content of the first enzyme of the pathway, 6-methylsalicylic acid synthetase. Other enzyme contents also decreased but on a significantly longer time scale. Thus the in vivo half-maximal lifetimes for the synthetase and for the m-hydroxybenzyl alcohol and isoepoxydon dehydrogenases were about 7, 17, and 19 h, respectively.

scholarly journals Production of 4-Hydroxybenzyl Alcohol by Metabolically Engineered Corynebacterium glutamicum

2020 ◽  
Vol 48 (4) ◽  
pp. 506-514
Author(s):  
Bu-Yeon Kim ◽  
Hye-Bin Jung ◽  
Ji-Yeong Lee ◽  
Lenny Ferrer ◽  
Henry Syukur Purwanto ◽  
...  
Keyword(s):  
Corynebacterium Glutamicum ◽  
Hydroxybenzyl Alcohol
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