Safety of (2R,3R,4S,5R,6R)-2-(Hydroxymethyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triol. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: (2R,3R,4S,5R,6R)-2-(Hydroxymethyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triol, is researched, Molecular C7H14O6, CAS is 1824-94-8, about Database of free solution mobilities for 276 metabolites. Author is Petrov, Alexander P.; Sherman, Lindy M.; Camden, Jon P.; Dovichi, Norman J..
Although databases are available that provide mass spectra and chromatog. retention information for small-mol. metabolites, no publicly available database provides electrophoretic mobility for common metabolites. As a result, most compounds found in electrophoretic-based metabolic studies are unidentified and simply annotated as “”features””. To begin to address this issue, the authors analyzed 460 metabolites from a com. library using capillary zone electrophoresis coupled with electrospray mass spectrometry. To speed anal., a sequential injection method was used wherein six compounds were analyzed per run. An uncoated fused silica capillary was used for the anal. at 20° with a 0.5% (volume/volume) formic acid and 5% (volume/volume) methanol background electrolyte. A Prince autosampler was used for sample injection and the capillary was coupled to an ion trap mass spectrometer using an electrokinetically-pumped nanospray interface. The authors generated mobility values for 276 metabolites from the library (60% success rate) with an average standard deviation of 0.01 × 10-8 m2V-1s-1. As expected, cationic and anionic compounds were well resolved from neutral compounds Neutral compounds co-migrated with electroosmotic flow. Most of the compounds that were not detected were neutral and presumably suffered from adsorption to the capillary wall or poor ionization efficiency.
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate