(<i>S</i>)-(+)-<i>N</i>-Acetylphenylglycineboronic Acid: A Chiral Derivatizing Agent for Ee Determination of 1,2-Diols
作者:Emilia Caselli、Chiara Danieli、Stefania Morandi、Beatrice Bonfiglio、Arrigo Forni、Fabio Prati
DOI:10.1021/ol0359970
日期:2003.12.1
[GRAPHICS]A new chiral derivatizing agent for ee determination of 1,2-diols via H-1 NMR is described. (S)-(+)-N-Acetylphenylglycineboronic acid (1) is synthesized in enantiomerically pure form; its reaction with chiral diols quantitatively yields cyclic boronic esters 5a-g. The latter show a remarkably high diastereodifferentiation of proton NMR signals useful for de determination.