ChemInform Abstract: HETEROCYCLIC COMPOUNDS PART 5, PREPARATION OF SOME NEW NAPHTHOXAZOLE DYES AND HIGHLY STABLE DIAZONIUM SALTS

1974 ◽  
Vol 5 (31) ◽  
pp. no-no
Author(s):  
A. M. OSMAN ◽  
S. A. MOHAMED ◽  
M. A. ABBADY ◽  
A. M. MAHMOUD
Keyword(s):  
Heterocyclic Compounds ◽  
Diazonium Salts

scholarly journals General Synthesis of 1-Aryl-6-azaisocytosines and Their Utilization for the Preparation of Related Condensed 1,2,4-Triazines

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3558 ◽  
Author(s):  
František Zálešák ◽  
Jan Slouka ◽  
Jakub Stýskala
Keyword(s):  
Functional Groups ◽  
Heterocyclic Compounds ◽  
Tautomeric Equilibrium ◽  
Diazonium Salts ◽  
General Synthesis

A simple general synthesis of 1-aryl-6-azaisocytosine-5-carbonitriles 4 is described. This method is based on coupling diazonium salts with cyanoacetylcyanamide 2 and then cyclization of the formed 2-arylhydrazono-2-cyanoacetylcyanamides 3. The 6-azaisocytosines 4 were studied with respect to tautomeric equilibrium and the transformation of functional groups, and used in the synthesis of the condensed heterocyclic compounds: Purine isosteric imidazo[2,1-c]-[1,2,4]triazine 8 and the 1,2,4-triazino[2,3-a]quinazolines 9–12.

Probing the Carbon-Nitrogen Bonding in Heterocyclic Compounds with the N K-Shell Excitation Spectroscopy

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-527-C2-528
Author(s):  
St Bender ◽  
R. Franke ◽  
J. Hormes ◽  
A. A. Pavlychev ◽  
N. G. Fominykh ◽  
...  
Keyword(s):  
Heterocyclic Compounds

Antiviral Activity of Fluorinated Heterocyclic Compounds

2016 ◽  
Author(s):  
Liubov Biliavska ◽  
Yulia Pankivska ◽  
Olga Povnitsa ◽  
Svitlana Zagorodnya ◽  
Ganna Gudz ◽  
...  
Keyword(s):  
Antiviral Activity ◽  
Heterocyclic Compounds ◽  
Strong Antiviral Activity

Synthesis and Characterization of Some New Esters Containing Heterocyclic and Derived From Azo Dyes

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Zena G. Alrecabi ◽  
Zainab Amer ◽  
Naeemah Al-Lami
Keyword(s):  
Schiff Base ◽  
13C Nmr ◽  
Azo Dyes ◽  
Spectral Methods ◽  
Anthranilic Acid ◽  
Heterocyclic Compounds ◽  
Synthesis And Characterization ◽  
Cooh Group ◽  
Molecular Weights

This study including prepared new colored esters containing heterocyclic with high molecular weights. In the first part of work we synthesized azo dyes [1,2] from the reaction p-toluidine with β-naphthol and o-nitro phenol, thin we synthesized Schiff bases [3,4] by the reaction anthranilic acid with benzaldehyde and dimethyl benzaldehyde. The reaction azo dyes (contain OH group) with Schiff base (contain COOH group) these led to produce the new colored esters [A1-A4]. The second part of work was modification the (C=N-) group in esters to heterocyclic compounds by reacting with phenyl iso cyanide to produce new β-lactam [B1-B4] and with anthranilic acid to get new hydroquinazoline [C1-C4]. All these compounds were characterized by physical properties and spectral methods FTIR, 1H-NMR and 13C-NMR.

Tropolone-Based Treatments for Visualising Latent Fingermarks on Porous Surfaces

2019 ◽  
Author(s):  
Clara M. Agapie ◽  
Melissa Sampson ◽  
William Gee
Keyword(s):  
Amino Acids ◽  
Uv Radiation ◽  
Membered Ring ◽  
Diazonium Salts ◽  
Chemical Detection ◽  
Latent Fingerprints ◽  
Porous Surfaces

The work describes a new chemical means of visualising latent fingerprints (fingermarks) using tropolone. Tropolone reacts with amino acids within the fingermark residue to form adducts that absorb UV radiation. These adducts provide useful contrast on highly-fluorescent prous surfaces will illuminated with UV radiation. The conjugated seven-membered ring of the tropolone adduct can be reacted further diazonium salts, which is demonstrated here with formation of two dyes. The methodology is extremely rapid, occurring in minutes with mild heating, and can be applied before ninhydrin in a chemical detection sequence. <br>

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