Abstract
A simple chiral analysis of amino acid esters by fluorine-19 nuclear magnetic resonance (19 FNMR) through the modified James-Bull method is described. Thus, amino acid ester acid salt was treated with 5-fluoro-2-formylphenylboronic acid and (S)-BINOL in the presence of triethylamine (TEA) and MS4A for 10minutes. The reaction mixture was analysed by 19 FNMR directly to afford good quantifications.
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