Preparation of partially O-methylated alditol acetate standards of allose, altrose, gulose and talose for GC–MS analysis of structures containing rare sugars
Camila A. Munoz Munoz, Cara A. Luiten, Tracey J. Bell, Simon F.R. Hinkley, Ian M. Sims
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引用次数: 0
Abstract
Mixtures of partially O-methylated alditol acetate standards of allose, altrose, gulose and talose were synthesised. Methyl glycosides of each sugar were prepared and partially methylated using the NaOH/DMSO methylation procedure, adding 0.75 hydroxyl group equivalents of CH3I. Following conversion to partially methylated alditol acetates, via successive hydrolysis, reduction, and acetylation, the derivatives were separated by gas chromatography on low and high polarity columns and analysed by electron impact mass spectrometry. Detailed data on retention times relative to myo-inositol hexaacetate on the two columns are provided.
期刊介绍:
Carbohydrate Research publishes reports of original research in the following areas of carbohydrate science: action of enzymes, analytical chemistry, biochemistry (biosynthesis, degradation, structural and functional biochemistry, conformation, molecular recognition, enzyme mechanisms, carbohydrate-processing enzymes, including glycosidases and glycosyltransferases), chemical synthesis, isolation of natural products, physicochemical studies, reactions and their mechanisms, the study of structures and stereochemistry, and technological aspects.
Papers on polysaccharides should have a "molecular" component; that is a paper on new or modified polysaccharides should include structural information and characterization in addition to the usual studies of rheological properties and the like. A paper on a new, naturally occurring polysaccharide should include structural information, defining monosaccharide components and linkage sequence.
Papers devoted wholly or partly to X-ray crystallographic studies, or to computational aspects (molecular mechanics or molecular orbital calculations, simulations via molecular dynamics), will be considered if they meet certain criteria. For computational papers the requirements are that the methods used be specified in sufficient detail to permit replication of the results, and that the conclusions be shown to have relevance to experimental observations - the authors'' own data or data from the literature. Specific directions for the presentation of X-ray data are given below under Results and "discussion".