An Environmentally Sustainable Mechanochemical Route to Hydroxamic Acid Derivatives
作者:Rita Mocci、Lidia De Luca、Francesco Delogu、Andrea Porcheddu
DOI:10.1002/adsc.201600350
日期:2016.10.6
An operationally simple, and cost efficient conversion of carboxylic acids into hydroxamicacid derivatives via a high‐energy mechanochemical activation is presented. This ball milling methodology was applied to a wide variety of carboxylic acids dramatically improving purification issues associated with this class of molecules, which still remain one of the main bottlenecks of classical methodologies
inhibitory activities against fattyacidamidehydrolase. Among of them, 13 compounds inhibitfattyacidamidehydrolase by 50% at the concentration of 100 μM. Of these compounds, the most active one is compound 9, which inhibitfattyacidamidehydrolaseactivity 98.35% at the concentration of 100 µM. Comparative molecular field analysis analyzes were performed based on obtained biologicalactivities data
Inhibitors of oleamide hydrolase, responsible for the hydrolysis of an endogenous sleep-inducing lipid (1, cis-9-octadecenamide) were designed and synthesized. The most potent inhibitors possess an electrophilic carbonyl group capable of reversibly forming a (thio) hemiacetal or (thio) hemiketal to mimic the transition state of a serine or cysteine protease catalyzed reaction. In particular, the tight binding .alpha.-keto ethyl ester 8 (1.4 nM) and the trifluoromethyl ketone inhibitor 12 (1.2 nM) were found to have exceptional inhibitory activity. In addition to the inhibitory activity, some of the inhibitors displayed agonist activity which resulted in the induction of sleep in laboratory animals.
P(III)‐Assisted Electrochemical Access to Ureas via in situ Generation of Isocyanates from Hydroxamic Acids
作者:Haiwen Meng、Kunhui Sun、Zhimin Xu、Lifang Tian、Yahui Wang
DOI:10.1002/ejoc.202100113
日期:2021.3.19
P(III)‐assisted electrochemical generation of isocyanates from hydroxamic acids was successfully applied in the synthesis of ureas. Hydroxamic acids were directly used without pre‐activation, and the reaction was found not sensitive to water or air. The process started with the anodic oxidation of hydroxamic acids, followed by reacting with trivalent phosphine to form corresponding alkoxyphosphoniums
Evolving the Promiscuity of
<i>Elizabethkingia meningoseptica</i>
Oleate Hydratase for the Regio‐ and Stereoselective Hydration of Oleic Acid Derivatives
catalyzed by fattyacid hydratases (FAHYs) allows for highly regio‐ and stereoselective oxyfunctionalization of renewable oil feedstock. So far, the applicability of FAHYs has been limited to free fattyacids, mainly owing to the requirement of a carboxylate function for substrate recognition and binding. Herein, we describe for the first time the hydration of oleic acid (OA) derivatives lacking this