the synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .theprepared compounds were characterized by uv-visible , ft-ir and h nmr spectroscopictechniques . the effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...

Abstract The preparation 0f azo dyes is the subject of this research. 4-hydroxycoumarin with each ofo-amino benzoic acid (3-[o-Amino acidazo]-4-hydroxycoumarin]) (B 1 ) and Sulfa guanidine (3-[Sulfa azo]-4-hydroxycoumarin) 2 were syntheses. Azo compounds characterized by I.R, CHN, H-NMR Elctronic Mass spectroscopy. At various pH levels, electronic spectra these investigated in terms acid-base p...

Objective(s):Involvement of tyrosinase in the synthesis of melanin and cell signaling pathway has made it an attractive target in the search for therapeutic inhibitors for treatment of different skin hyperpigmentation disorders and melanoma cancers. Materials and Methods: In the present study, we conducted a comprehensive kinetic analysis to understand the mechanisms of inhibition imposed by 2-...

The synthesis and properties of new monoazo dyes derived from the diazonium salts of paminobenzoic acid, 3-trifluoromethyl aniline , 4-trifluoromethyl aniline are considered .Theprepared compounds were characterized by UV-Visible , FT-IR and H NMR spectroscopictechniques . The effect of varying solvent upon the absorption ability of p-amino benzoic acidcoupled with 4,4 —diethyl aniline , anilin...

In the title compound, C(18)H(20)N(2)O(3), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The mol-ecule has an E conformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intra-molecular O-H⋯N hydrogen bond makes an S(6) ring motif. In the...

The title mol-ecule, C(14)H(12)N(2)O(2), exhibits a V-shaped conformation with a dihedral angle of 59.69 (3)° between the benzene and pyridine rings. In the crystal, O-H⋯N hydrogen bonds link the mol-ecules into zigzag chains along [010].

objective(s):involvement of tyrosinase in the synthesis of melanin and cell signaling pathway has made it an attractive target in the search for therapeutic inhibitors for treatment of different skin hyperpigmentation disorders and melanoma cancers. materials and methods: in the present study, we conducted a comprehensive kinetic analysis to understand the mechanisms of inhibition imposed by 2-...

This research. Included the preparation. and characterization some novel. Six seven membered Heterocyclic. Compounds ( oxazepine , thiazine quinazoline ) The first step in clode react 2-amino-6- methoxybenzothiazole with 4- amino acetophenone to get Schiff base derivative (1). second (1) 4 -hydroxy schiff (2) last involve Phthalic Maleic Succinic) anhydride .get derivatives (3,4and 5) also with...

ABSTRACT. Quorum sensing (QS), used by many pathogenic bacteria to express virulence factors, is seen as a new and effective strategy combat resistant bacteria. In this study, theoretical investigations were made on the structural data of molecules support inhibition effects 2-amino 4-chloro benzoic acid 4-amino 2-chloro molecules. Theoretical calculations performed using density functional the...