[EN] PYRIDAZINE-3-FORMAMIDE COMPOUND, AND PREPARATION METHOD THEREFOR AND MEDICAL USE THEREOF [FR] COMPOSÉ DE PYRIDAZINE-3-FORMAMIDE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION MÉDICALE [ZH] 哒嗪-3-甲酰胺类化合物、其制备方法及其在医药学上的应用
The Through-Bond Interaction of a Sulfur Lone Pair with Oxygenated Substituents in the Thiacyclohexane Framework
作者:Laura Andrau、Jonathan M. White
DOI:10.1071/ch05073
日期:——
for a through-bondinteraction between the sulfur lone pair and the oxygenated substituent. In contrast to earlier suggestions, plots of C–OR bond distance versus pKa (ROH) showed that any interaction between the sulfur and the OR group is unlikely to be of a through-bond origin. Furthermore, unimolecular solvolysis rate measurements on the nosylate ester derivative 5g showed that the sulfur actually
低温 X 射线晶体结构对一系列具有不同电子需求的 4-噻环己醇 5a 衍生物进行了测定,以寻找硫孤对和氧化取代基之间通过键相互作用的证据。与之前的建议相反,C-OR 键距离与 pKa (ROH) 的关系图表明硫和 OR 基团之间的任何相互作用都不太可能是通过键的来源。此外,对 nosylate 衍生物 5g 的单分子溶剂分解速率测量表明,与相应的无硫类似物 6 相比,硫实际上稍微延迟了反应。
[EN] PYRIDAZINE-3-FORMAMIDE COMPOUND, AND PREPARATION METHOD THEREFOR AND MEDICAL USE THEREOF<br/>[FR] COMPOSÉ DE PYRIDAZINE-3-FORMAMIDE, SON PROCÉDÉ DE PRÉPARATION ET SON UTILISATION MÉDICALE<br/>[ZH] 哒嗪-3-甲酰胺类化合物、其制备方法及其在医药学上的应用