Oxatellurazolium and oxatellurazinium compounds

Details Oxatellurazolium and oxatellurazinium compounds Oxatellurazolium and oxatellurazinium compounds

1987-08-24

1989-05-16

Ford, John M.

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

Organic compounds

548100, 548242, C07D29304, C07D29308

Patent

active

048311367

ABSTRACT:
Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addends in silver halide photographic systems.

REFERENCES:
patent: 2168174 (1939-08-01), Schlichting
patent: 2323503 (1943-07-01), Wilson
patent: 2323504 (1943-07-01), Wilson
patent: 2339094 (1944-01-01), Middleton
patent: 4329284 (1982-05-01), Detty et al.
patent: 4365016 (1982-12-01), Detty et al.
patent: 4365017 (1982-12-01), Detty et al.
Amundsen et al., Chemical Abstracts, vol. 98, entry 44621f (1983).
Maatschappij, Chemical Abstracts, vol. 98, entry 179392c (1983).
"Un Nouvel Heterocycle Tellure: 1e Benzisotellurazole-1,2", Campsteyn et al., Journal of Heterocyclic Chemistry, vol. 15, August 1978, pp. 745-748.

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