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A simple chiral derivatisation protocol for determining the enantiopurity of O-silyl-protected-1,2-amino alcohols by 1 H NMR spectroscopic analysis is described, which involves their treatment with 2-formylphenylboronic acid and enantiopure (syn)-methyl-2,3-dihydroxy-3-phenylpropionate to afford mixtures of imino-boronate esters whose diastereoisomeric ratio is an accurate reflection of the...
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