Krchnak, V. published the artcileNovel pyrimidine derivatives, reactions, and ultraviolet spectra, Name: 5-Aminopyrimidine-2-carbonitrile, the publication is Collection of Czechoslovak Chemical Communications (1975), 40(5), 1396-402, database is CAplus.
The conditions were studied for selective hydrolysis of I (R1 = NH2, NMe2, OH, OAc, OMe, SH, SMe, H, F, Cl, Br, SOME2, SO2Me, CN) and the products characterized by uv spectra. Hydrolysis of I in boiling 0.02M H2SO4 or 0.2M AcOH gave the corresponding II, while treating I with 0.2M H2SO4 at 110° or with boiling 5% K2CO3 solution yielded the appropriate III. In strongly alk. media I (R1 = CN) gave III (R1 = CONH2) and III (R1 = CO2H). Special conditions were required for the hydrolysis of I (R1 = F) (IV) which gave in 3M KHF2 at 75° II (R1 = F) and at 120° afforded III (R1 = F), while heating IV in 5% K2CO3 solution yielded III (R1 = NMe2).
Collection of Czechoslovak Chemical Communications published new progress about 56621-93-3. 56621-93-3 belongs to pyrimidines, auxiliary class Pyrimidine,Nitrile,Amine, name is 5-Aminopyrimidine-2-carbonitrile, and the molecular formula is C5H4N4, Name: 5-Aminopyrimidine-2-carbonitrile.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia