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Chiral resolution of monosaccharides as 1‐phenyl‐3‐methyl‐5‐pyrazolone derivatives by ligand‐exchange CE using borate anion as a central ion of the chiral selector
Author(s) -
Kodama Shuji,
Aizawa Senichi,
Taga Atsushi,
Yamashita Tomohisa,
Yamamoto Atsushi
Publication year - 2006
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200600140
Subject(s) - monosaccharide , chemistry , fucose , mannose , arabinose , galactose , ligand (biochemistry) , boron , xylose , stereochemistry , organic chemistry , biochemistry , receptor , fermentation
Six reducing monosaccharides (mannose, galactose, fucose, glucose, xylose, and arabinose) were derivatized with 1‐phenyl‐3‐methyl‐5‐pyrazolone (PMP) and chiral resolution of these racemic PMP‐monosaccharides was studied by ligand‐exchange CE using borate anion as a central ion of the chiral selector and ( S )‐3‐amino‐1,2‐propanediol (SAP) as a chiral selector ligand. PMP‐mannose, PMP‐galactose and PMP‐fucose were successfully enantioseparated. Lowering the capillary temperature increased the resolution of PMP‐mannose system, but decreased that of PMP‐galactose and PMP‐fucose systems. Whereas the maximum resolution was obtained at pH 8.9 in the PMP‐mannose system, resolution increased gradually with pH in the PMP‐galactose and PMP‐fucose systems. Expecting the formation of the ternary borate complexes with SAP and PMP‐monosaccharide in the CE experiments, the optimized structures of the borate diastereomers were obtained by semiempirical molecular orbital calculations to discuss the structural difference of the diastereomers in connection with the enantioseparation behaviors.