In 1978,Tetrahedron Letters included an article by Lapachev, V. V.; Zagulyaeva, O. A.; Bichkov, S. F.; Mamaev, V. P.. Formula: C9H9N3O2. The article was titled 《Tautomerism in the pyrimidylmethane systems》. The information in the text is summarized as follows:
The tautomerism of pyrimidyl-4-methanes I [R = CH(CN)CO2Et, R1 = Me, CF3; R = CH2NO2, R1 = Me, H] was studied by 13C and 1H NMR methods. In the presence of DMSO pyrimidine, ortho quinoid and para quinoid forms were observed; the tautomeric equilibrium between these forms, especially between pyrimidylidene tautomers, depends strongly on solvent and is more complicated than suggested by H. Feuer and J. P. Lawrence (1972). Pyrimidine-pyrimidylidene equilibrium were also observed in the pyrimidyl-2-methanes II (R = H, R1 = H, Me, Br, Cl, OMe, NMe2; R = Me, Ph, OMe, R1 = H).Ethyl 2-cyano-2-(pyrimidin-2-yl)acetate(cas: 65364-63-8Formula: C9H9N3O2) was used in this study.
Ethyl 2-cyano-2-(pyrimidin-2-yl)acetate(cas: 65364-63-8) is a member of pyrimidine. Pyrimidine derivatives are an important class of N-heterocycles. They are well-known for their wide spectrum of promising biological activities such as antitumors, bactericidals, and fungicidal.Formula: C9H9N3O2
Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia