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Chiral purity is a measure of the purity of a chiral drug. Other synonyms employed include enantiomeric excess , enantiomer purity, enantiomeric purity, and optical purity. Optical purity is an obsolete term since today most of the chiral purity measurements are done using chromatographic techniques (not based on optical principles).
l-Glucose is an organic compound with formula C 6 H 12 O 6 or O=CH[CH(OH)] 5 H, specifically one of the aldohexose monosaccharides. As the l-isomer of glucose, it is the enantiomer of the more common d-glucose. l-Glucose does not occur naturally in living organisms, but can be synthesized in the laboratory.
Purification of the three types of cyclodextrins takes advantage of the different water solubility of the molecules: β-CD which is poorly water-soluble (18.5 g/L or 16.3 mM at 25 °C) can be easily retrieved through crystallization while the more soluble α- and γ-CDs (145 and 232 g/L respectively) are usually purified by means of expensive ...
Chiral recognition implies the ability of chiral stationery phases to interact differently with mirror-image molecules, leading to their separation. The mechanism of enantiomeric resolution using CSPs is generally attributed to the “three-point" interaction model (fig.1.) between the analyte and the chiral selector in the stationary phase.
However, since all other isomers are meso (non-chiral) compounds, the name myo-inositol is now preferred (myo- being a medical prefix for "muscle"). Inositol was once considered a member of the vitamin B complex, namely vitamin B 8 before the discovery that it is made naturally in the human body, and therefore cannot be a vitamin or essential ...
Mannose differs from glucose by inversion of the C-2 chiral center. Mannose displays a 4 C 1 {\displaystyle ^{4}C_{1}} pucker in the solution ring form. This simple change leads to the drastically different biochemistry of the two hexoses .
Four types of glucose-based polysaccharides are possible: 1,6- , 1,4- , 1,3- , and 1,2-bonded glucans. The first representatives of main chain unhydrolysable linear polymers made up of levoglucosan units were synthesized in 1985 by anionic polymerization of 2,3- epoxy derivatives of levoglucosan (1,6;2,3-dianhydro-4-O-alkyl-β- D -mannopyranoses).
For example, the aldohexose glucose may form a hemiacetal linkage between the aldehyde group on carbon 1 and the hydroxyl on carbon 4, yielding a molecule with a 5-membered ring, called glucofuranose. The same reaction can take place between carbons 1 and 5 to form a molecule with a 6-membered ring, called glucopyranose.