申请人:Eastman Kodak Company
公开号:US04831136A1
公开(公告)日:1989-05-16
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.
本发明公开了含有芳香环部分与碲唑啉或衍生碲唑烯、碲唑啉(包括碲唑啉基)或碲唑啉环部分融合的化合物,以及其制备的过程和中间体。通过正确选择的侧链基团,这些碲唑啉和衍生化合物可以作为染料、防雾剂或稳定剂、成核剂、潜影保持添加剂,或在卤化银摄影系统中作为速度或对比度改变添加剂有用地应用。