Results 81 to 90 of about 13,012 (246)

Acid-catalyzed Epimerization of Kobophenol A to Carasinol B

Molecules, 2008
The conversion from kobophenol A into carasinol B, two main chemicalconstituents of Caragana sinica, was confirmed by in vitro acid-catalyzed epimerization.The result provides important information about the biotransformation of kobophenol A inplants and
Changqi Hu, Gaolin Liang, Kejun Cheng
doaj   +1 more source

Interfering Effects of Growing Chain Epimerization on Metallocene-Catalyzed Isotactic Propene Polymerization [PDF]

, 1997
The stereoregularity of polypropylene produced with C2-symmetric group 4 ansa-metallocene catalysts results from the interplay of two competing reactions, namely isotactic monomer polyinsertion and a side process of epimerization of the polymer chain at ...
Roberta Cipullo, CAPORASO, Lucia, VACATELLO, MICHELE, Diego Brita, CIPULLO, ROBERTA, Brita Diego, Caporaso Lucia, Vincenzo Busico, Michele Vacatello, BUSICO, VINCENZO   +9 more
core   +1 more source

Effect of bile acid oxazoline derivatives on microorganisms participating in 7 alpha-hydroxyl epimerization of primary bile acids.

Journal of Lipid Research, 1983
We tested bile acid oxazoline derivatives of chenodeoxycholic (CDC-OX), 7-ketolithocholic (7-KLC-OX), ursodeoxycholic (UDC-OX), and deoxycholic (DC-OX) as inhibitors of the 7-epimerization of the primary bile acids cholic acid (CA) and CDC in cultures of
I A Macdonald, J D Sutherland, B I Cohen, E H Mosbach   +3 more
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Epimerization during the coupling to the unnatural amino acid in solid phase peptide synthesis [PDF]

, 2001
Extensive epimerization was observed during the coupling of FmOC-L-Trp(Boc) and FmoC-L-Pro to D-Ual, a synthetic a-amino acid with a nucleobase in the side chain.
Zhang, Zhenyu, Chaltin, Patrick, Herdewijn, Piet, Busson, Roger, Van Aerschot, Arthur   +4 more
core   +1 more source

Chemical synthesis of rare carbohydrates

Green Chemistry Letters and Reviews
Rare carbohydrates (e.g. D-tagatose, D-allulose, and D-xylulose) are regarded as ideal sugar replacers in a number of food formulations due to their relative sweetness and caloric value.
Sergio I. Martínez-Monteagudo
doaj   +1 more source

Bio-inspired synthesis of rare and unnatural carbohydrates and cyclitols through strain driven epimerization [PDF]

, 2014
We report a bio-inspired, strain driven epimerization of trans-ketals to cis-ketals through an enolate intermediate. Swern oxidation of a hydroxyl group adjacent to a trans-ketal effects both oxidation and its epimerization to cis-ketal.
Sureshan, Kana M., Mohanrao, Raja, Asokan, Aromal   +2 more
core   +1 more source

Beyond Ribosomal Binding: The Increased Polarity and Aberrant Molecular Interactions of 3-epi-deoxynivalenol

Toxins, 2016
Deoxynivalenol (DON) is a secondary fungal metabolite and contaminant mycotoxin that is widely detected in wheat and corn products cultivated around the world.
Yousef I. Hassan, Honghui Zhu, Yan Zhu, Ting Zhou   +3 more
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Table 3. Amino acid epimerization ratios and age determination for molluscs collected from Nordenskiold Bay [PDF]

, 1999
Table 3.
Matishov, Gennady G, Lubinski, David J, Miller, Gifford H, Gifford H Miller (7519688), Tarasov, Gennadiy A, Gennady G Matishov (7893131), Polyak, Leonid, Gennadiy A Tarasov (6962714), Forman, Steven L, David J Lubinski (6967478), Leonid Polyak (6172871), Steven L Forman (6960365)   +11 more
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Synthesis and base-induced epimerization of cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes [PDF]

, 1999
Bredenkötter B, Barth D, Kuck D. Synthesis and base-induced epimerization of cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes. CHEMICAL COMMUNICATIONS. 1999;(9):847-848.Strained cis,cis,cis,trans-tribenzo[5.5.5.6]fenestranes are accessible in good yield by
Barth, Dieter, Bredenkötter, Björn, Kuck, Dietmar   +2 more
core   +1 more source

Determinants of Glycosaminoglycan (GAG) Structure

Biomolecules, 2015
Proteoglycans (PGs) are glycosylated proteins of biological importance at cell surfaces, in the extracellular matrix, and in the circulation. PGs are produced and modified by glycosaminoglycan (GAG) chains in the secretory pathway of animal cells.
Kristian Prydz
doaj   +1 more source