Structure-reactivity correlations in the aminolysis of aryl chloroformates
作者:Enrique A. Castro、Mar�a G. Ruiz、Jos� G. Santos
DOI:10.1002/kin.1022
日期:——
pH 6.2–7.3. The Bronsted-type plots for the kN values for the aminolysis of both chloroformates are linear, with slopes ca. 0.3, which is consistent with rate-determining formation of a zwitterionic tetrahedral intermediate (T±). With the pKa and log kN data for the present reactions, together with those for the same aminolysis of phenyl and 4-nitrophenyl chloroformates, two dual parametric equations
Nucleofugality hierarchy, in the aminolysis reaction of 4-cyanophenyl 4-nitrophenyl carbonate and thionocarbonate. Experimental and theoretical study
作者:Rodrigo Montecinos、Margarita E. Aliaga、Paulina Pavez、Patricio Cornejo、José G. Santos
DOI:10.1039/d0nj05837h
日期:——
Nucleophilic substitution reactions of the title compounds have been investigated with a series of secondary alicyclic amines in several solvents. The solvent, amine, and electrophilic group effects on kinetics, mechanism and nucleofugality hierarchy are discussed from experimental and theoretical studies. These studies show the mechanistic dependence on the solvent polarity; the theoretical results
已经在几种溶剂中用一系列脂环仲胺研究了标题化合物的亲核取代反应。从实验和理论研究中讨论了溶剂、胺和亲电子基团对动力学、机理和核疏散等级的影响。这些研究显示了对溶剂极性的机械依赖性;理论结果表明,反应中心(C O 和C S )的相对极化和离核剂的稳定性是控制产物分布的主要因素。
Characterization of Tunable Piperidine and Piperazine Carbamates as Inhibitors of Endocannabinoid Hydrolases
作者:Jonathan Z. Long、Xin Jin、Alexander Adibekian、Weiwei Li、Benjamin F. Cravatt
DOI:10.1021/jm9016976
日期:2010.2.25
Monoacylglycerol lipase (MAGL) and fatty acid amide hydrolase (FAAH) are two enzymes froth the serine hydrolase superfamily that degrade the endocannabinoids 2-arachidonoylglycerol and anandamide, respectively. We have recently discovered that MAGL and FAAH arc both inhibited by carbamates bearing an N-piperidine/piperazine group. Piperidine/piperazine carbamates show excellent in vivo activity, raising brain endocannabinoid levels and producing CBI-dependent behavioral effects in mice, suggesting that they represent a promising class of inhibitors for studying the endogenous functions of MAGL and FAAH. Herein, we disclose a full account of the syntheses, structure-activity relationships, and inhibitory activities of piperidine/piperazine carbamates against members of the serine hydrolase family. These scaffolds can be tuned for MAGL-selective or dual MAGL-FAAH inhibition by the attachment of an appropriately substituted bisarylcarbinol or aryloxybenzyl moiety, respectively, on the piperidine/piperazine ring. Modifications to the piperidine/piperazine ring ablated inhibitory activity, suggesting a strict requirement for a six-membered ring to maintain potency.
METHODS AND COMPOSITIONS RELATED TO TARGETING MONOACYLGLYCEROL LIPASE