7942. 1H-Purine

Nomenclature

CAS number: 120-73-0
7H-Imidazo[4,5-d]pyrimidine.
C5H4N4; mol wt 120.11.
C 50.00%, H 3.36%, N 46.65%.

Description and references

Prepd by heating 4,5-diaminopyrimidine with anhydr formic acid in a current of carbon dioxide: Isay, Ber. 39, 251 (1906); by boiling 2,6-diiodopurine with zinc dust and water under carbon dioxide: Fischer, ibid. 31, 2551, 2564 (1898).

Chemical structure

Properties

Needles from toluene or alcohol, mp 216-217° (partial sublimation on rapid heating). Freely sol in water, hot alcohol. Slightly sol in hot ethyl acetate, acetone. Practically insol in ether, chloroform. Aq solns are neutral to litmus. Forms salts with acids and bases.