Oxachalcogenazole dyes and processes for their preparation

Details Oxachalcogenazole dyes and processes for their preparation Oxachalcogenazole dyes and processes for their preparation

1985-02-19

1986-07-08

Raymond, Richard L.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

430270, 430495, 544345, 544368, 546 82, 546 83, 546113, 546118, 546148, 546165, 546198, 546270, 548110, 548113, 548120, 548121, 548149, 548150, 548159, 548161, 548217, 548224, 548225, 548238, 548252, 548305, 548345, 548348, 548371, 548374, 548455, 548518, 548427, 548440, C07D29310

Patent

active

045994102

ABSTRACT:
Methine dyes are disclosed which contain a 2-halo or pseudohalo substituted 1,2,5-oxatellurazole ring fused with an aromatic nucleus, the aromatic nucleus being substituted with a methine linkage terminating in an auxochrome providing a conjugated resonance chromophore. The dyes can be formed by condensing a methine linkage precursor with a compound containing an oxatellurazole ring fused with an aromatic nucleus. The dyes are useful in optical recording elements and in photographic elements.

REFERENCES:
patent: 4446223 (1984-05-01), Wadsworth et al.
Elwood, "Dyes Containing the Phenaline Ring System, I. Synthesis of Benzothiazole-Containing Dyes", Journal of Organic Chemistry, 38, 2425-2430, (1973).
Research Disclosure, vol. 176, Dec. 1978, Item 17643.

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