Riand, Jacques published the artcileProton and carbon-13 nmr study of substituted pyrimidines. IV. Hindered rotation of N,N-dimethylamino-4-pyrimidines in the monoproton state, Product Details of C6H9N3, the publication is Canadian Journal of Chemistry (1980), 58(5), 466-71, database is CAplus.
The free energy of activation for hindered rotation about the C-N exocyclic bond in some N,N-dimethylaminopyrimidine hydrochlorides was determined by 1H and 13C NMR. Monoprotonation of N,N-dimethylaminopyrimidines induces a large increase in the free energy of activation. This increase is larger for the 4-dimethylamino group than for the 2-dimethylamino group due to the predominance of the monoprotonated (N-1 H) form.
Canadian Journal of Chemistry published new progress about 31401-45-3. 31401-45-3 belongs to pyrimidines, auxiliary class Pyrimidine,Amine, name is N,N-Dimethylpyrimidin-4-amine, and the molecular formula is C6H9N3, Product Details of C6H9N3.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/Pyrimidine,
Pyrimidine – Wikipedia