Fluoro-substituted 2-formylphenylboronic acids: Structures, properties and tautomeric equilibria
作者:Kornelia Kowalska、Agnieszka Adamczyk-Woźniak、Patrycja Gajowiec、Błażej Gierczyk、Ewa Kaczorowska、Łukasz Popenda、Grzegorz Schroeder、Artur Sikorski、Andrzej Sporzyński
DOI:10.1016/j.jfluchem.2016.05.001
日期:2016.7
Four isomeric fluoro-2-formylphenylboronic acids were synthesized and characterized by 1H, 13C, 19F and 17O NMR. Molecular and crystal structure of two compounds was determined by single crystal XRD method. pKa values of all the isomers have been determined by spectrophotometric method and compared with the results for the corresponding benzoxaboroles as well as fluoro- and formylphenylboronic acids
合成了四种异构的氟-2-甲酰基苯基硼酸,并通过1 H,13 C,19 F和17 O NMR进行了表征。用单晶XRD法测定了两种化合物的分子结构和晶体结构。已经通过分光光度法确定了所有异构体的p K a值,并将其与相应的苯并氧杂硼酸酯以及氟代和甲酰基苯基硼酸的结果进行了比较。研究了具有环苯并恶唑硼酸酯形式的互变异构平衡。讨论了氟取代基的位置对所研究化合物性质的影响。