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  • Title: Borate esters of the methyl D-glucopyranosides.
    Author: Benner K, Klüfers P, Labisch O.
    Journal: Carbohydr Res; 2007 Dec 28; 342(18):2801-6. PubMed ID: 17889842.
    Abstract:
    Methyl alpha- and beta-D-glucopyranoside act as moderate chelators of a boron centre through their O-4/6 binding site whereas the trans/trans arrangement of the O-2/3/4 hydroxy functions is not suited to form a chelate with the small boron central atom. In this work we report the crystal structure of the bisdiolatoborate Na2[B(Me alpha-D-Glcp4,6H(-2))(Me alpha-D-Glcp3,4,6H(-3))].NaOH.8H2O (1) along with a combined 11B and 13C NMR spectroscopic studies of borate-pyranoside solutions at different concentrations and pH. It is shown that crystallisation of a bisdiolatoborate needs both a high pH and a high total concentration.
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