hemiacetal वाक्य
उदाहरण वाक्य
मोबाइल
- The inventor of a heat-stable ( and therefore useful ) POM homopolymer was Dal Nagore, who discovered that reacting the hemiacetal ends with acetic anhydride converts the readily depolymerizable hemiacetal into a thermally stable, melt-processable plastic.
- While an epimer is a stereoisomer that differs in configuration at any single stereogenic center, an anomer is a cyclic saccharide and an epimer that differs in configuration, specifically at the hemiacetal / acetal carbon, also called the anomeric carbon.
- The reducing end of an oligosaccharide is the monosaccharide residue with hemiacetal functionality, thereby capable of reducing the Tollens reagent, while the non-reducing end is the monosaccharide residue in acetal form, thus incapable of reducing the Tollens reagent.
- Dienyl esters such as "'11 "'were transformed into substituted bicyclo [ 2.2 . 2 ] octanes via an isomerization step stabilized by a hemiacetal azolium intermediate ( "'13 "').
- I've been trying to come up with a mechanism for this reaction-- obviously hemiacetals can be easily oxidised to esters but it seems to me that maybe the ethoxy oxygen has to react with some sort of electrophilic catalyst first.
- In aldohexoses this equilibrium is established as the hemiacetal bond between C-1 ( the carbon bound to two oxygens ) and C-5 oxygen is cleaved ( forming the open-chain compound ) and reformed ( forming the cyclic compound ).
- The open-chain form of a monosaccharide often coexists with a closed ring form where the aldehyde / ketone carbonyl group carbon ( C = O ) and hydroxyl group ( OH ) react forming a hemiacetal with a new C O C bridge.
- :Ring closure in sugars is a type of hemiacetal or hemiketal reaction, see also Furanose which is the 5-membered ring of which you speak .-- 32 " "'18 : 28, 6 November 2009 ( UTC)
- Based on these new data, McQuade proposed a new mechanism, suggesting that the proton transfer step is the RDS . First and second steps are not changed, but after the first aldol addition the second addition of aldehyde occurs to form a hemiacetal alkoxide.
- Naming of oligosaccharides proceeds from left to right ( from the non-reducing end to the reducing end ) as glycosyl [ glycosyl ] n glycoses or glycosyl [ glycosyl ] n glycosides, depending on whether or not the reducing end is a free hemiacetal group.
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