C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
96/203, 260/298.
C07D 517/04 (2006.01) G03C 1/83 (2006.01)
Patent
CA 1258460
NOVEL CHALCOGEN HETEROCYCLES, PROCESSES FOR THEIR PREPARATION, AND ARTICLES CONTAINING SUCH HETEROCYCLES Abstract of the Disclosure Isotellurazolo[1,5-a]tellurazoles are disclosed which satisfy the formula: Image wherein R is comprised of a hydrocarbon group selected from among alkyl of from 1 to 6 carbon atoms, cycloalkyl of from 3 to 8 carbon atoms, alkenyl of from 2 to 6 carbon atoms, alkynyl of from 2 to 6 carbon atoms, aryl of from 6 to 10 carbon atoms, and aralkyl or alkaryl the alkyl moiety of which contains from 1 to 6 carbon atoms and the aryl moiety of which contains fro 6 to 10 carbon atoms, the hydrocarbon group being unsubstituted or halo substituted where halo is chosen from the class consisting of fluoro, chloro, bromo, and iodo substituents, oxyalkyl, oxyaryl, oxyalkaryl, oxyalkaryl, thioalky, thioaryl, thioalkaryl, or thioaralkyl substituted wherein the alkyl moieties in each instance contain from 1 to 6 carbon atoms, or = S(O-2OM' or --OS(O2)OM' substituted, where M' is hydrogen, ammonium, an alkali metal, alkyl of from 1 to 6 carbon atoms, or aryl of from 6 to 10 carbon atoms, R1 and R2 are individually chosen from among hydrogen, hydroxy, hydroxyalkyl, alkyl, alkoxy, alkylthio, aryloxy, arylthio, hydroxyaryl, and -N(R4)2, where the alkyl moieties contain from 1 to 6 carbon atoms, he aryl moieties contain from 6 to 10 carbon atoms, and R4 is independently in each occurrence hydrogen or R; or R1 and R2 together form a -O-(CH2)n-O- linkage where n is preferably 1 to 3; and .PHI. is an unsubstituted phenyl group or an R substituted phenyl group. These heterocycles can be prepared by reacting a diarylformamidine with an aromatic tellurazolium salt which is substituted at its 2 ring position with a methine group precursor. The product heterocycles are useful directly for their blue light absorption and in forming stable heterocyclic nuclei containing compounds, such as photographic addenda.
501420
Gunther Wolfgang H.h.
Przyklek-Elling Rosemary
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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