Preparation of Di- or triarylmethane dyes by oxidation

Details Preparation of Di- or triarylmethane dyes by oxidation Preparation of Di- or triarylmethane dyes by oxidation

1996-03-13

1997-08-19

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Acyclic carbon bonded directly to three benzene rings or to...

552109, 552110, 552113, 552114, 564330, C09B 1104, C09B 1110

Patent

active

056590539

ABSTRACT:
A process for preparing di- or triarylmethane dyes by oxidation of di- or triarylmethanes in the presence of a diluent and of an oxygen transfer catalyst that contains a complexed heavy metal ion comprises using as oxidizing agent hydrogen peroxide, a hydrogen peroxide donor compound, an organic hydroperoxide or a percarboxylic acid and as the oxygen transfer catalyst a member of the class of the porphyrins, tetraaza[14]annulenes, phthalocyanines or tetraazacyclotetradecanes.

REFERENCES:
patent: 4000135 (1976-12-01), Kast
Chemical Abstracts, AN-48849, JP-A-56-057-848, May 20, 1981.
Chemistry Letters, pp. 1217-1220, Apr. 15, 1991, E. Kimura, et al., "The Proximal Imidazole Effect on Manganese(III)-cyclam Complex".
Kontakte 1985, vol. 3, pp. 38-48, D. Wohrle, et al., "Phthalocyanine --Ein System Ungewohnlicher Structur und Eigenschaften".
Chemical Abstracts, AN-90-095402, & JP-A-2-47160, Feb. 16, 1990.
Chemical Abstracts, AN-57396, JP-A-53-074-530, Jul. 3, 1978.
Patent Abstracts of Japan, vol. 14, No. 211, (C-715)(4154), May 2, 1990, JP-A-20 47 160, Feb. 16, 1990.

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