7931. Pteridine

Nomenclature

CAS number: 91-18-9
Pyrazino[2,3-d]pyrimidine; pyrimido[4,5-b]pyrazine; pyrimidine-4′,5′:2,3-pyrazine; 1,3,5,8-tetraazanaphthalene; azinepurine; benzotetrazine.
C6H4N4; mol wt 132.12.
C 54.54%, H 3.05%, N 42.41%.

Description and references

Prepn from 4,5-diaminopyrimidine and polyglyoxal or glyoxal sodium bisulfite: Albert et al., J. Chem. Soc. 1951, 474.

Chemical structure

Properties

Yellow crystals from benzene, mp 138-138.5°. uv max (water): 298, 309 nm (log ε 3.87, 3.83). Sol in 7.2 parts water at 20-25°.

Caution

Related to folic acid antagonists.