Acetylcholinesterase inhibition by products generated in situ from the transformation of N-arylisomaleimides
作者:Juan A. Guevara、José G. Trujillo、Delia Quintana、Hugo A. Jiménez、Mónica G. Arellano、José R. Bahena、Feliciano Tamay、Fabiola J. Ciprés
DOI:10.1007/s00044-017-2122-4
日期:2018.3
the transformation reaction proved to be influenced by electronic effects. This was demonstrated qualitatively by 1H NMRspectroscopy and quantitatively by monitoring the kinetic of isomerization of N-phenylisomaleimide to N-phenylmaleimide. Subsequently, the first pseudo-order and activation energy (E a) of the process were determined. The compounds showed in situ influence on AChE inhibition. The derivatives
当N-芳基异马来酰亚胺在酶促反应条件下转化时,转化反应被证明受电子效应的影响。通过1 H NMR光谱定性地证明了这一点,并且通过监测N-苯基异马来酰亚胺向N-苯基马来酰亚胺的异构化动力学定量地证明了这一点。随后,第一伪阶和活化能(E a)的过程已确定。这些化合物对AChE抑制作用具有原位影响。具有吸电子基团的衍生物表现出比具有供电子基团的衍生物更好的效果。电子实验表明配体评估了与CAS位点之间已建立的相互作用。这表明这些化合物可用于产生更好的可逆和竞争性AChE抑制剂。
Cyanuric chloride: decent dehydrating agent for an exclusive and efficient synthesis of kinetically controlled isomaleimides
作者:Kishan P. Haval、Santosh B. Mhaske、Narshinha P. Argade
DOI:10.1016/j.tet.2005.10.027
日期:2006.1
Starting from maleanitic and maleamic acids, a facile general approach to kinetically controlled isomaleimides has been described for the first time using cyanuric chloride as a dehydrating agent with 85-98% yields. The effect of a variety of substituents present on the aromatic ring in amine and maleic anhydride moiety, on these kinetic/thermodynamic dehydration processes of anilic acids has been also described. Under the same set of reaction conditions the phthalanilic acid gave kinetically controlled product, isoplitalimide in 91% yield, while the corresponding succinanilic acid furnished the thermodynamically more stable succinimide in high yield. (c) 2005 Elsevier Ltd. All rights reserved.
Reactions of o-aminothiophenol withαβ-unsaturated dicarbonyl systems. Facile synthesis of benzothiazines and benzothiazepines
Propanephosphonic Acid Anhydride–Mediated Cyclodehydration of Maleic Acid Monoamides
作者:Igors Klimenkovs、Eduards Bakis、Anda Priksane
DOI:10.1080/00397911.2012.727060
日期:2013.10.2
Propanephosphonic acid anhydride (T3P) has been proposed as a novel reagent for the preparation of maleic acid isoimides from the corresponding monoamides. A series of substituted aromatic and aliphatic isoimides have been prepared in good yields. The main advantage of this synthetic method is the use of environmentally benign, cost-efficient reagents and solvents, which are also safer to handle than the ones employed previously. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.