Acridinium Salt-Based Fluoride and Acetate Chromofluorescent Probes: Molecular Insights into Anion Selectivity Switching
摘要:
A series of acridinium salt-based probes capable of detecting fluoride and acetate anions via a nucleophilic attack at the C9 position of the acridinium moiety is reported. The formation of corresponding acridane displays drastic changes, in both UV-vis absorption and fluorescence emission. The sensing mechanism is a reversible process upon treating either tetrafluoroborate salt or an acid.
Formation of Acridones by Ethylene Extrusion in the Reaction of Arynes with β-Lactams and Dihydroquinolinones
摘要:
N-Unsubstituted beta-lactams react with a molecule of aryne by insertion into the amide bond to form a 2,3-dihydroquinolin-4-one, which subsequently reacts with another molecule of aryne to form an acridone by extrusion of a molecule of ethylene. 2,3-Dihydroquinolin-4-ones react under the same reaction conditions to afford identical results. This is the first example of ethylene extrusion in aryne chemistry.
Synthesis of Novel Carbohydrate Acridinone Derivatives with Potential Biological Activities using 1,3‐Dipolar Cycloaddition
作者:Mirta L. Fascio、Norma Beatriz D'Accorso、Rolando F. Pellón、Maite L. Docampo
DOI:10.1080/00397910701575178
日期:2007.12
Abstract Novel 10‐[3‐(6‐hydroxy‐2,2‐dimethyltetrahydrofuro[2,3‐d][1,3]dioxol‐5‐yl)‐4,5‐dihydro‐5‐isoxazolyl]methyl}‐9(10H)‐acridinone derivatives (13–16) were synthesized by 1,3‐dipolar cycloaddition using the carbohydratederivative as dipole and different 10‐allyl‐9(10H)‐acridinone derivatives (9–12) as dipolarophiles. The new cycloadducts as well as the dipolarophiles precursors were characterized
Long wavelength sensitizers for europium(iii) luminescence based on acridone derivatives
作者:Anjum Dadabhoy、Stephen Faulkner、Peter G. Sammes
DOI:10.1039/b104541p
日期:2002.1.23
The preparation of several acridone derivatives which have been shown to act as sensitizers for europium(III) luminescence at wavelengths longer than 400 nm is described. The efficiency of sensitization increases as the chromophore is held closer to the ion and the inner sphere hydration number of the ion lowered.
The invention relates to tricyclic heterocyclic derivatives, or pharmaceutically-acceptable salts or in vivo hydrolysable esters thereof, which possess anti-cancer activity. The invention also relates to processes for the manufacture of said tricyclic heterocyclic derivatives, to novel pharmaceutical compositions containing them and to the use of said tricyclic heterocyclic derivatives in the manufacture of a medicament for the production of an anti-cancer effect.
The invention provides an optionally substituted tricyclic heterocyclic derivative of the formula I
wherein A together with the adjacent vinylene group of the 4-oxo-1,4-dihydropyrid-1-yl ring completes a benzene or pyridine ring;
R¹ and R², which may be the same or different, each is (1-4C)alkyl or (1-4C)alkoxy;
and R³ is hydrogen, (1-4C)alkyl or (1-4C)alkoxy;
or a pharmaceutically-acceptable salt or in vivo hydrolysable ester thereof.
DMSO–allyl bromide: a mild and efficient reagent for atom economic one-pot <i>N</i>-allylation and bromination of 2°-aryl amines, 2-aryl aminoamides, indoles and 7-aza indoles
A mixture DMSO–allyl bromide has been developed as a reagent for an atom economic one-pot N-allylation and aryl bromination under basic conditions. Utilizing this reagent, N-allylation–bromination of a number of 2°-aryl amines, aryl aminoamides, indoles, and 7-aza indoles has been achieved. The scope of the substrates and limitations, the synthetic utility of the products, and a plausible reaction
Synthesis and Antibacterial Activity of New Acridone Derivatives Containing an Isoxazoline Fragment
作者:T. N. Kudryavtseva、A. Yu. Lamanov、P. I. Sysoev、L. G. Klimova
DOI:10.1134/s1070363220010077
日期:2020.1
A method was developed for the preparation of N-(4-R-4,5-dihydroisoxazol-5-yl)methylacridones by the reaction of aromatic aldehyde oximes with allyl acridones. For the obtained compounds, a high inhibitory activity in relation to test strains of pathogenic microorganisms was revealed, exceeding furacilin.