Observations on the Deprotection of Pinanediol and Pinacol Boronate Esters via Fluorinated Intermediates
作者:Steven R. Inglis、Esther C. Y. Woon、Amber L. Thompson、Christopher J. Schofield
DOI:10.1021/jo901930v
日期:2010.1.15
pinacol esters of various boronic acids via fluoroborane intermediates were evaluated. Treatment of the boronate esters with potassium hydrogen difluoride normally gives trifluoroborate salts; in the case of α-amido alkyl or o-amido phenyl boronate esters, aqueous workup gives difluoroboranes. Procedures for transformation of both trifluoroborates and difluoroboranes to free boronic acids are described.
Synthesis and Evaluation of 3-(Dihydroxyboryl)benzoic Acids as <scp>d</scp>,<scp>d</scp>-Carboxypeptidase R39 Inhibitors
作者:Steven R. Inglis、Astrid Zervosen、Esther C. Y. Woon、Thomas Gerards、Nathalie Teller、Delphine S. Fischer、André Luxen、Christopher J. Schofield
DOI:10.1021/jm9009718
日期:2009.10.8
PBPs are of interest because bacteria have evolved resistance to the β-lactam antibiotics. Boronic acids have been developed as inhibitors of the mechanistically related serine β-lactamases and serine proteases; however, they have not been explored extensively as PBP inhibitors. Here we report aromatic boronic acid inhibitors of the d,d-carboxypeptidase R39 from Actinomadura sp. strain. Analogues of