Synonymer & Anagram | Engelska ordet ANOMERIC

Exempel på hur du använder ANOMERIC i en mening

• The glucose can be in either the α-pyranose form or the β-pyranose form, whereas the galactose can have only the β-pyranose form: hence α-lactose and β-lactose refer to the anomeric form of the glucopyranose ring alone.
• In a nucleoside, the anomeric carbon is linked through a glycosidic bond to the N9 of a purine or the N1 of a pyrimidine.
• The glycosidic linkages are designated as alpha or beta depending on the relative stereochemistry of the anomeric (or most oxidized) carbon.
• In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a glycosidic bond.
• The furanose ring will have either alpha or beta configuration, depending on which direction the anomeric hydroxy group is pointing.
• However, in order for anomers to exist, the sugar must be in its cyclic form, since in open-chain form, the anomeric carbon atom is planar and thus achiral.
• Each of these rings is subject to further isomerism, depending on the relative orientation of the anomeric hydroxy group.
• Hyperconjugation can be used to rationalize a variety of chemical phenomena, including the anomeric effect, the gauche effect, the rotational barrier of ethane, the beta-silicon effect, the vibrational frequency of exocyclic carbonyl groups, and the relative stability of substituted carbocations and substituted carbon centred radicals, and the thermodynamic Zaitsev's rule for alkene stability.
• The anomeric effect can also be generalized to any cyclohexyl or linear system with the general formula , where Y is a heteroatom with one or more lone pairs, and X is an electronegative atom or group.
• However, while in sucrose the glucose is linked to the anomeric carbon of the fructose (an α-1,2 glycosidic linkage), in isomaltulose the linkage is to the 6 carbon (α-1,6), making isomaltulose a reducing sugar, unlike sucrose.
• In the first step, the nucleophile attacks the anomeric centre, resulting in the formation of a glycosyl enzyme intermediate, with acidic assistance provided by the acidic carboxylate.
• It is the product of the enzyme amidophosphoribosyltransferase which attaches ammonia from glutamine to phosphoribosyl pyrophosphate (PRPP) at its anomeric carbon:.
• This gives an intermediate with an unwanted methoxy group at the anomeric centre, which is removed by reaction with triethylsilane in the presence of boron trifluoride etherate.
• CDH catalyses the 2e-/2H+ oxidation of the anomeric carbon atom (C1) of the disaccharide cellobiose to the cellobiono-δ-lactone hydrolyses further to cellobionic acid in water.
• This occurs as a result of a reaction between nucleoside triphosphate (NTP) and glycosyl monophosphate (phosphate at anomeric carbon).
• The protein encoded by this gene is a member of the glucuronyltransferase gene family, enzymes that exhibit strict acceptor specificity, recognizing nonreducing terminal sugars and their anomeric linkages.
• The first enzyme, amidophosphoribosyltransferase, attaches ammonia from glutamine to the ribotide at its anomeric carbon, forming phosphoribosylamine (PRA):.
• Secondary alcohol at the anomeric carbon of 2,3,4,5-O-Benzyl-protected glucose reacted to form a glycosyl mesylate, which was found to be more stable than its triflate counterpart, in 2,4,6-collidine.
• This classical approach typically requires multiple protection/deprotection steps in addition to the key anomeric activation/coupling reaction which, depending upon the glycosyl donor/acceptor pair, can lead to a mixture of anomers.
• The reactions often result in a mixture of products due to the creation of a new stereogenic centre at the anomeric position of the glycosyl donor.

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