ChemInform Abstract: Synthesis and Characterization of New 4‐(Phenylazo)phenoxy Acetic Acids.

Abstract

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New Phenoxyacetic Acid Analogues with Antimicrobial Activity

“…The weak bands of region 1430-1400 cm -1 are due to the vibration of azo group and agree with the data presented in literature. [8][9][10] In conformity with our previous papers, the examination of the infrared spectra of compounds 1-4 reveals that the azo group shows a stronger absorption in region 1590-1562cm -1 than in 1417-1406cm -1 [5,6].…”

“…The novel 4-phenylazo-phenoxyacetic acids have been synthesised starting from 4-phenylazo-phenols and monochloroacetic acid using a method described in previous papers. [5,6] As intermediates: 2-chloro-4phenylazo-phenol, 2-allyl-4-(4-chloro-phenylazo)-phenol, 2-bromo-4-phenylazo-phenol, 4-(4-cyano-phenylazo)phenol, have been used. They have been obtained by the coupling of adequate diazonium salts with different phenols.…”

“…We have recently reported the synthesis of 4-phenylazophenoxyacetic acids by the condensation of some 4phenylazo-phenols with chloroacetic acid [5,6].…”

Physical, Thermal and Biological Properties of Yellow Dyes with Two Azodiphenylether Groups of Anthracene

“…The preparation of bis-azo compounds is generally performed by condensing in a basic medium the bis-chloromethylated derivatives with the azophenolshas; the synthesis procedure was comprehensively described in several previous papers [71][72][73]. Here, we study two bis-chloromethylated compounds of anthracene, which were obtained by condensing the 9,10-bis(chloromethyl) anthracene with the 4-hydroxy-4 -phenylazo-diphenyl or with the 4-hydroxy-4 -(4-methyl-phenylazo)-diphenyl.…”

“…Further, the nucleophilic attack of the phenoxide anion on the biscloromethyl derivative of anthracene led to the formation of the bis-azo bis-eter. The precipitate obtained is separated on a G4 sintered glass filter, washed several times with distilled water and ethanol, and then dried in an oven at 105 • C [73]. The reaction product is purified by recrystallization from toluene; the compounds obtained are: the 9,10-bis (((4 -phenyldiazenyl)-[1,1 -biphenyl]-4-yl)oxy)methyl)anthracene (BPA), represented in Figure 1 and the 9,10-bis(((4 -p-tolyldiazenyl)-[1,1 -biphenyl]-4-yl)oxy)methyl)anthracene (BTA), represented in Figure 2.…”