5598. Lumichrome

Nomenclature

CAS number: 1086-80-2
7,8-Dimethylbenzo[g]pteridine-2,4-(1H,3H)-dione; 7,8-dimethylalloxazine; 6,7-dimethylalloxazine.
C12H10N4O2; mol wt 242.23.
C 59.50%, H 4.16%, N 23.13%, O 13.21%.

Description and references

Irradiation product of riboflavine. Isoln: Karrer et al., Helv. Chim. Acta 17, 1010 (1934). Prepn: Tishler, Wellman, US 2417143 (1947 to Merck & Co.); Cresswell, Wood, J. Chem. Soc. 1960, 4768; Bardos et al., US 3057865 (1962 to Armour Pharm. Co.); Seng, Ley, Angew. Chem. 84, 1061 (1972).

Chemical structure

Properties

Pale yellow crystals from pyridine or pyridine + alcohol, mp >300°. Sparingly sol in methanol and 90% hot ethanol, water and chloroform. The aqueous, alcoholic and chloroformic solns fluoresce blue. Absorption spectrum: Karrer et al., loc. cit.