Oxo-4H-l-benzotellurines

Treatment of 2-[2-(4-dimethylaminophenyl)-ethen-l -yl]-4-ethoxy-7-methoxy-l -benzo-tellurinium fluorosulfate dissolved in acetonitrile with 10% aqueous potassium carbonate produced 2-[2- (4-dimethylammophenyl) -ethen-l-yl] ]- 7-methoxy-4-oxo-4H-l-benzotellurin. ... 

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