Novel fluorescent markers for hypoxic cells of naphthalimides with two heterocyclic side chains for bioreductive binding
摘要:
Novel naphthalimides with two heterocyclic side chains of 2-nitroimidazole for bioreductive binding were designed, synthesized, and used as fluorescent markers for hypoxic cells. Their evaluation for imaging tumor hypoxia was carried Out in V79 cells, CHO cells, and 95D cells in vitro by using fluorescence scan ascent. A(2) and A(4) showed a very large differential fluorescence between hypoxic and oxic cells (V79 cells) in vitro and are promising candidate markers for hypoxic cells. (c) 2005 Elsevier Ltd. All rights reserved.
4-α-Amino acid substituted naphthalimides can be photocleaved at the C–N bond between the 4-amino and the amino acid residue under visible light irradiation, releasing a fluorophore, 4-aminonaphthalimide.
Nucleophilic displacement of the nitro group in 2- and 4-nitronaphthalic-1, 8-anhydrides and their derivatives
作者:Michael Alexiou、John Tyman、Ian Wilson
DOI:10.1016/s0040-4039(01)92917-x
日期:——
The nitro group in 2- and 4-nitronaphthalic-1,8-anhydrides can be substituted by amines in certain cases with retention of the anhydride grouping.
在某些情况下,在保留酸酐基团的情况下,2-和4-硝基萘-1,8-酸酐中的硝基可以被胺取代。
[EN] MIGRATION-FREE COLOURED COPOLYCONDENSATES FOR COLOURING POLYMERS<br/>[FR] PRODUITS DE COPOLYCONDENSATION COLORÉS EXEMPTS DE MIGRATION POUR LA COLORATION DE POLYMÈRES
申请人:BASF SE
公开号:WO2011036075A1
公开(公告)日:2011-03-31
The invention relates to coloured and/or fluorescent copolycondensates which are obtained by reaction of colourants substituted by at least two reactive groups which do not interfere with one another, with selected cyclic dicarboxylic acids (especially 1,4-cyclohexanedicarboxylic acid), aliphatic diols (especially ethylene glycol), cyclic diamines (especially isophoronediamine) and/or amino acids in particular amounts.
Three different kinds of cyclic imides with imido protons are chosen to interact with Hg(II): succinimide, the simplest cyclic imide (five-membered ring); phthalimide (conjugated five-membered ring); and 1,8-naphthalimide (conjugated six-membered ring). Based on the results of MS, 1H-NMR, XPS, IR spectroscopy and fluorescence response analyses, it is suggested that N-unsubstituted cyclic imides react specifically with Hg(II) and form imide-Hg-imide complexes through an imido proton–metal exchange process. The reaction is reversible and occurs rapidly at moderate to high pH. This discovery expands the comprehension of the specific interaction of Hg(II) with the nucleobase thymine, and may open up new possibilities in designing novel ligands for sensing and removing Hg(II) based on cyclic imides.