903. 6-Azathymine

Nomenclature

CAS number: 932-53-6
6-Methyl-1,2,4-triazine-3,5(2H,4H)-dione; 5-methyl-6-azauracil; 3,5-dihydroxy-6-methyl-1,2,4-triazine.
C4H5N3O2; mol wt 127.10.
C 37.80%, H 3.97%, N 33.06%, O 25.18%.

Description and references

Prepn: Thiele, Bailey, Ann. 303, 82 (1898); Bailey, Am. Chem. J. 28, 386 (1902); Bougault, Daniel, Compt. Rend. 186, 1216 (1928); Chang, J. Org. Chem. 23, 1951 (1958).

Chemical structure

Properties

Crystals from water. mp 210-212°. pKa 7.6. uv max (0.1N HCl): 261 nm (ε 5200); in 0.1N NaOH: 246 nm (ε 4770).