ChemInform Abstract: Oxidation of Aromatic Amines with Chromyl Chloride. Part 1. Oxidation of Aromatic Primary Amines.

Nallaiah, C.; Strickson, J.A.

doi:10.1002/chin.198648130

Chemischer Informationsdienst

1986

DOI: 10.1002/chin.198648130

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ChemInform Abstract: Oxidation of Aromatic Amines with Chromyl Chloride. Part 1. Oxidation of Aromatic Primary Amines.

C. Nallaiah

J.A. Strickson

Abstract: The oxidation of aromatic amines, e.g. (Ia)‐(Io), with chromyl Chloride yields solid intermediates (studied in detail in the following paper), affording mixtures of the azobenzenes (II) and the quinone derivatives (III)‐(VI) on hydrolysis.

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1999

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Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays

Matsui¹,

Shirai²,

Tanaka³

et al. 1999

J. Mater. Chem.

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Tris-, tetrakis-, and pentakisazo dyes have been prepared by the oxidation of 4-(arylazo)arylamines. Iodobenzene diacetate was the preferred oxidant for preparation of 4,4'-bis(arylazo)azobenzenes and 4,4'bis(arylazo)-2,2',3,3',5,5',6,6'-octa¯uoroazobenzenes, whereas silver(II) oxide proved a satisfactory oxidant for synthesis of 4,4'-(arylazo)(methyl-substituted)azobenzenes. Unsymmetrical tris-and tetrakisazo dyes were also obtained by cross oxidation. The absorption bands of these azo dyes were observed in the range of 381±472 nm in liquid crystals. The solubility of the trisazo dyes in hexane was the highest, followed by the tetrakis-and pentakisazo dyes. The unsymmetrical derivative having methyl groups in the central p-phenylene moieties was most soluble among the trisazo dyes. The order parameters (S) of the tris-, tetrakis-, and pentakisazo derivatives were in the range 0.66±0.81, suf®ciently high for the practical application of these dyes in liquid crystal displays.

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Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays

Matsui¹,

Shirai²,

Tanaka³

et al. 1999

J. Mater. Chem.

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show abstract

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ChemInform Abstract: Oxidation of Aromatic Amines with Chromyl Chloride. Part 1. Oxidation of Aromatic Primary Amines.

Abstract: The oxidation of aromatic amines, e.g. (Ia)‐(Io), with chromyl Chloride yields solid intermediates (studied in detail in the following paper), affording mixtures of the azobenzenes (II) and the quinone derivatives (III)‐(VI) on hydrolysis.

Cited by 1 publication

References 1 publication

Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays

Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays

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ChemInform Abstract: Oxidation of Aromatic Amines with Chromyl Chloride. Part 1. Oxidation of Aromatic Primary Amines.

Abstract: The oxidation of aromatic amines, e.g. (Ia)‐(Io), with chromyl Chloride yields solid intermediates (studied in detail in the following paper), affording mixtures of the azobenzenes (II) and the quinone derivatives (III)‐(VI) on hydrolysis.

Cited by 1 publication

References 1 publication

Synthesis of tris­, tetrakis­, and pentakisazo dyes and their application to guest–host liquid crystal displays

Synthesis of tris­, tetrakis­, and pentakisazo dyes and their application to guest–host liquid crystal displays

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Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays

Synthesis of tris, tetrakis, and pentakisazo dyes and their application to guest–host liquid crystal displays