Estimation of Dissociation Constants (pKa'S) of Oximes from Proton Chemical Shifts in Dimethyl Sulfoxide Solution
作者:A. Peter Kurtz、Themistocles D.J. D'Silva
DOI:10.1002/jps.2600760805
日期:1987.8
carbamoyloxime acetylcholinesterase inhibitors, a straight-forward approach to estimating pKa values of a series of precursor oximes and thiohydroximates has been developed. The pKa values of oximes correlate well with the proton chemical shifts of the oximino proton (delta OH) in dilute dimethyl sulfoxide-d6 solution. The relationship pKa = 29.10 - 1.63 delta OH was developed from delta OH and pKa data for 20
结合杀虫甲基氨基甲酰肟肟乙酰胆碱酯酶抑制剂的结构活性研究,已开发出一种简单的方法来估算一系列前体肟和硫代羟肟酸酯的pKa值。肟的pKa值与稀二甲基亚砜-d6溶液中肟基质子(δOH)的质子化学位移相关。pKa = 29.10-1.63 delta OH的关系是从delta OH和20种化合物的pKa数据得出的,这些数据既可以从文献中获得,也可以从半中和势(δHNP)实验得出。利用这种关系,可以计算出200多种氢氧氨基化合物的pKa值。该关系已扩展到也包括酚:pKa = 28.15-1.55三角洲OH-3.96I(苯酚),