Preparation of d-Mannose
نویسندگان
چکیده
منابع مشابه
Direct 2,3-O-isopropylidenation of α-D-mannopyranosides and the preparation of 3,6-branched mannose trisaccharides.
A highly efficient, regioselective method for the direct 2,3-O-isopropylidenation of α-D-mannopyranosides is reported. Treatment of various α-D-mannopyranosides with 0.12 equiv of the TsOH·H2O and 2-methoxypropene at 70 °C gave 2,3-O-isopropylidene-α-D-mannopyranosides directly in 80%~90% yields. Based on this method, a 3,6-branched α-D-mannosyl trisaccharide was prepared in 50.4% total yield u...
متن کاملThe Occurrence of D-mannose in Seaweed and the Separation of L-fucose and D-mannose.*
The wide-spread occurrence of mannans and fucosans in nature makes it not improbable that some of these vegetable gums may in fact consist in part at least of fuco-mannans. In general the isolation and identification of two or more sugars from a mixture is often fraught with experimental difficulties, particularly if the material is available only in small amounts. Any simple procedure applicab...
متن کاملEnzymatic assay of D-mannose in serum.
We describe a new and improved enzymatic assay for determining the concentration of D-mannose in sera. Serum D-glucose is selectively converted to glucose-6 phosphate with the highly specific thermostable glucokinase (EC 2.7.1.2) from Bacillus stearothermophilus. The anionic reaction products and excess substrates are removed by a rapid and simple anion-exchange chromatography step in microcent...
متن کاملEnzymatic determination of D-mannose in serum.
A new and simple enzymatic assay for measuring D-mannose in serum is described. Endogenous glucose is eliminated from serum by use of glucose oxidase (EC 1.1.3.4) and catalase (EC 1.11.1.6). D-Mannose concentration is calculated from the increase in NADH formation after mannosephosphate isomerase (EC 5.3.1.8) is added. This increase is a result of coupling the following series of enzymes: hexok...
متن کاملPreparation of (±)-1-Allyl-4-deoxy Mannose Derivatives
Preparation of 4-deoxy mannose intermediates, useful for the synthesis of hemibrevetoxin is reported by a short reaction pathway.
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ژورنال
عنوان ژورنال: Journal of Research of the National Bureau of Standards
سال: 1941
ISSN: 0091-0635
DOI: 10.6028/jres.026.032