(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.COA of Formula: C16H22O11
Two-bond 13C-13C spin-coupling constants in saccharides: dependencies on exocyclic hydroxyl group conformation was written by Lin, Jieye;Meredith, Reagan J.;Oliver, Allen G.;Carmichael, Ian;Serianni, Anthony S.. And the article was included in Physical Chemistry Chemical Physics in 2021.COA of Formula: C16H22O11 This article mentions the following:
Seven doubly 13C-labeled isotopomers of Me β-D-glucopyranoside, Me β-D-xylopyranoside, Me β-D-galactopyranoside, Me β-D-galactopyranosyl-(1→4)-β-D-glucopyranoside and Me β-D-galactopyranosyl-(1→4)-β-D-xylopyranoside were prepared, crystallized, and studied by single-crystal X-ray crystallog. and solid-state 13C NMR spectroscopy to determine exptl. the dependence of 2JC1,C3 values in aldopyranosyl rings on the C1-C2-O2-H torsion angle, θ2, involving the C2 carbon of the C1-C2-C3 coupling pathway. Using X-ray crystal structures to determine θ2 in crystalline samples and by selecting compounds that exhibit a relatively wide range of θ2 values in the crystalline state, 2JC1,C3 values measured in crystalline samples were plotted against θ2 and the resulting plot compared to that obtained from d. functional theory (DFT) calculations For θ2 values ranging from ~90° to ~240°, very good agreement was observed between the exptl. and theor. plots, providing strong validation of DFT-calculated spin-coupling dependencies on exocyclic C-O bond conformation involving the central carbon of geminal C-C-C coupling pathways. These findings provide new exptl. evidence supporting the use of 2JCCC values as non-conventional spin-coupling constraints in MA’AT conformational modeling of saccharides in solution, and the use of NMR spin-couplings not involving coupled hydroxyl hydrogens as indirect probes of C-O bond conformation. Solvomorphism was observed in crystalline βGal-(1→4)-βGlcOCH3 wherein the previously-reported methanol solvate form was found to spontaneously convert to a monohydrate upon air-drying, leading to small but discernible conformational changes in, and a new crystalline form of, this disaccharide. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4COA of Formula: C16H22O11).
(2S,3R,4S,5S,6R)-6-(Acetoxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetrayl tetraacetate (cas: 4163-60-4) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.COA of Formula: C16H22O11
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics