Synthesis and luminescence properties of salicylaldehyde isonicotinoyl hydrazone derivatives and their europium complexes
摘要:
Four novel salicylaldehyde isonicotinoyl hydrazone derivatives and their corresponding europium ion complexes were synthesized and characterized, while the luminescence properties and the fluorescence quantum yields of the target complexes were investigated. The results indicated that the ligands favored energy transfers to the emitting energy level of europium ion, and four target europium complexes showed the characteristic luminescence of central europium ion. Besides the luminescence intensity of the complex with methoxy group, which possessed the highest fluorescence quantum yield (0.522), was stronger than that of other complexes. Furthermore, the electrochemical properties of the target complexes were further investigated by cyclic voltammetry, the results indicated that the highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) energy levels and the oxidation potential of the complexes with electron donating group increased, however, that of the complexes with accepting electron group decreased. (C) 2015 Elsevier Inc. All rights reserved.
FUNCTIONALLY-MODIFIED OLIGONUCLEOTIDES AND SUBUNITS THEREOF
申请人:Sarepta Therapeutics, Inc.
公开号:US20140330006A1
公开(公告)日:2014-11-06
Functionally-modified oligonucleotide analogues comprising modified intersubunit linkages and/or modified 3′ and/or 5′-end groups are provided. The disclosed compounds are useful for the treatment of diseases where inhibition of protein expression or correction of aberrant mRNA splice products produces beneficial therapeutic effects.
The invention provides the compounds of formula (I) or pharmaceutically acceptable salts thereof. The invention also provides pharmaceutical compositions comprising one or more compounds of formula I or intermediates thereof and one more of pharmaceutically acceptable carriers, vehicles or diluents. The invention further provides methods of preparation and methods of use of prodrugs including NO-releasing prodrugs, double prodrugs and mutual prodrugs comprising the compounds of formula I.
Nitric Oxide Releasing Prodrugs of Therapeutic Agents
申请人:SATYAM Apparao
公开号:US20110263526A1
公开(公告)日:2011-10-27
The present invention relates to nitric oxide releasing prodrugs of known drugs or therapeutic agents which are represented herein as compounds of formula (I) wherein the drugs or therapeutic agents contain one or more functional groups independently selected from a carboxylic acid, an amino, a hydroxyl and a sulfhydryl group. The invention also relates to processes for the preparation of the nitric oxide releasing prodrugs (the compounds of formula (I)), to pharmaceutical compositions containing them and to methods of using the prodrugs.
BF<sub>3</sub>-Etherate-catalyzed tandem reaction of 2-formylarylketones with electron-rich arenes/heteroarenes: an assembly of isobenzofurans
作者:Pawan K. Mishra、Ankit Kumar、Akhilesh K. Verma
DOI:10.1039/d0cc02760j
日期:——
An efficient and BF3·Et2O-catalyzed chemoselective synthesis of diversified 1,3-diarylisobenzofuran in a high yield has been described. The reaction proceeds through sequential hydroarylation–cyclization between 2-formylarylketones and electron-richarenes/heteroarenes. Advantageous features of the developed methodology include operational simplicity, a broad substrate scope, and applicability towards
Ruthenium(II) hydrazone Schiff base complexes of the type [RuCl(CO)(B)(L)] (were B=PPh(3), AsPh(3) or Py; L=hydrazone Schiff base ligands) were synthesized from the reactions of hydrazone Schiff base ligand (obtained from isonicotinoylhydrazide and different hydroxy aldehydes) with [RuHCl(CO)(EPh(3))(2)(B)] (where E=P or As; B=PPh(3), AsPh(3) or Py) in 1:1 molar ratio. All the new complexes have been
[RuCl(CO)(B)(L)]类型的the(II)席夫碱配合物(是B = PPh(3),AsPh(3)或Py; L = hydr席夫碱配体)是由Sch席夫碱配体(由异烟酰酰肼和不同的羟基醛制得)与[RuHCl(CO)(EPh(3))(2)(B)](其中E = P或As; B = PPh(3),AsPh)反应(3)或Py)的摩尔比为1:1。所有新的配合物均已通过分析和光谱(FT-IR,电子,(1)H,(13)C和(31)P NMR)数据进行了表征。暂时为它们分配了八面体结构。在存在N-甲基吗啉N-氧化物(NMO)作为助氧化剂的情况下,合成的配合物具有催化活性,可将苄醇氧化为苯甲醛,将环己醇氧化为环己酮。