Anomeric equilibria in derivatives of amino sugars. Nuclear magnetic resonance studies on acetylated amino sugars and specifically deuterated analogs was written by Horton, Derek;Hughes, Jack B.;Jewell, Jon S.;Philips, Kerstin D.;Turner, William Nelson. And the article was included in Journal of Organic Chemistry in 1967.Formula: C16H23NO10 This article mentions the following:
Acetylation of derivatives of 2-amino-2-deoxy-D-glucose and 2-amino-2-deoxy-D-mannose with Ac2O-d6 permitted definitive assignment of the signal for the N-Ac Me group in the N.M.R. spectra of the pyranose pentaacetates of the 2 amino sugars, and some related derivatives The anomeric compositions of the mixtures formed by acetylation of the amino sugars, and a number of simple sugars, with Ac2O in pyridine, were investigated. Aryl substituents in acetylated sugar derivatives are shown to cause shielding of certain Ac groups, with the result that, in CHCl3-d, the N.M.R. signals of these Ac groups are observed at unusually high field. In the experiment, the researchers used many compounds, for example, (2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5Formula: C16H23NO10).
(2S,3S,4R,5S,6R)-3-Acetamido-6-(acetoxymethyl)tetrahydro-2H-pyran-2,4,5-triyl triacetate (cas: 6730-10-5) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. 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.Formula: C16H23NO10
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics