Cascade Synthesis of 2-Cyanoacrylamides through Deacetalization and/or Knoevenagel Condensation followed by Selective Monohydration of Acetals and Aldehydes over Solid Acid Ferrites
作者:Sumit B. Kamble、Chandrashekhar V. Rode
DOI:10.1002/cctc.201600426
日期:2016.8.22
involving deacetalization and/or Knoevenagel condensation followed by selective monohydration of nitriles starting from acetals (5) and aldehydes (2) with malononitrile (3). A series of aldehydes, dimethyl and diethyl acetals, along with some heterocyclic aldehydes were successfully transformed to 2‐cyanoacrylamides with >95 % yields. TEM images confirmed the coating of the PVP over nanosized Fe3O4
提出了一种新的生物活性2-氰基丙烯酰胺级联合成的方案(1)。该反应在回流条件下,在AcOH-H 2 O介质中,通过一种新型的可磁性回收的固体酸复合物进行,该复合物是氧化铁,聚(乙烯基吡咯烷酮)和磷钨酸(Fe 3 O 4 / PVP-PWA)。通过单中心布朗斯台德酸催化的级联反应(包括脱缩醛和/或Knoevenagel缩合反应,然后由乙缩醛(5)和醛(2)与丙二腈(3)选择性地单水合腈),可以促进这种转化。)。一系列醛,二甲基和二乙基乙缩醛以及一些杂环醛已成功转化为2-氰基丙烯酰胺,收率> 95%。TEM图像证实了PVP在纳米Fe 3 O 4上的涂层。NOESY实验证明了2-苄叉基丙二腈(4)立体选择性单水合为E异构体。由于使用了缩醛和醛,因此该催化剂具有磁性,因此可以有效地循环使用七次。
Triflic acid-catalyzed metal-free synthesis of (<i>E</i>)-2-cyanoacrylamides and 3-substituted azetidine-2,4-diones
作者:Bapurao D. Rupanwar、Santosh S. Chavan、Anil M. Shelke、Gurunath M. Suryavanshi
DOI:10.1039/c7nj05169g
日期:——
efficient synthesis of biologically active (E)-2-cyanoacrylamides and 3-substituted azetidine-2,4-diones has been reported with 64–94% yields under metal-free conditions. The reaction proceeds through sequential Knoevenagel condensation/stereoselective in situ monohydration of nitrile or C–N cyclization protocol in one-pot. The attractive features of this tandem process are moderate reaction conditions
Synthesis of new spirooxindolopyrrolidines via three-component reaction of isatins, α-amino acids, and (E)-3-aryl-2-cyanoacrylamides or (E)-3-aryl-2-(4-arylthiazol-2-yl)acrylonitriles
作者:Tetyana L. Pavlovska、Victoria V. Lipson、Svetlana V. Shishkina、Vladimir I. Musatov、Julia A. Nichaenko、Victor V. Dotsenko
DOI:10.1007/s10593-017-2075-z
日期:2017.4
of novel spirooxindolopyrrolidine derivatives has been prepared via a three-component1,3-dipolarcycloadditionreaction of 2-oxindoleazomethine ylides generated in situ from isatin and sarcosine or valine with (E)-3-aryl-2-cyanoacrylamides or (E)-3-aryl-2-(4-arylthiazol-2-yl)acrylonitriles as dipolarophiles. To rationalize the observed regio- and stereoselectivity, calculations of the geometrical structures
Prostaglandin E synthase inhibitors and methods for utilizing the same
申请人:University of Kentucky Research Foundation
公开号:US11325901B2
公开(公告)日:2022-05-10
Compounds and compositions are provided that can inhibit microsomal prostaglandin E synthase-1 (mPGES-1). The compounds and compositions can reduce inflammation in a subject, such as inflammation caused by an inflammation disorder or symptoms thereof. Pharmaceutical compositions comprising the compound are also provided. Furthermore, methods are provided for reducing inflammation and/or inhibiting mPGES-1. The methods can comprise administering an effective amount of the composition to a subject.
本研究提供了可抑制微粒体前列腺素 E 合酶-1(mPGES-1)的化合物和组合物。这些化合物和组合物可以减轻受试者的炎症,如炎症性疾病引起的炎症或其症状。还提供了包含该化合物的药物组合物。此外,还提供了减轻炎症和/或抑制 mPGES-1 的方法。这些方法可包括向受试者施用有效量的组合物。
Arylcyanoacrylamides as inhibitors of the Dengue and West Nile virus proteases
作者:Christoph Nitsche、Christian Steuer、Christian D. Klein
DOI:10.1016/j.bmc.2011.10.061
日期:2011.12
The 3-aryl-2-cyanoacrylamide scaffold was designed as core pharmacophore for inhibitors of the Dengue and West Nile virus serine proteases (NS2B-NS3). A total of 86 analogs was prepared to study the structure-activity relationships in detail. Thereby, it turned out that the electron density of the aryl moiety and the central double bond have a crucial influence on the activity of the compounds, whereas the influence of substituents of the amide residue is less relevant. The para-hydroxy substituted analog was found to be the most potent inhibitor in this series with a K(i)-value of 35.7 mu M at the Dengue and 44.6 mu M at the West Nile virus protease. The aprotinin competition assay demonstrates a direct interaction of the inhibitor molecule with active centre of the Dengue virus protease. The target selectivity was studied in a counterscreen with thrombin and found to be 2.8:1 in favor of DEN protease and 2.3:1 in favor of WNV protease, respectively. (C) 2011 Elsevier Ltd. All rights reserved.