
TY  - JOUR
A1  - Brown, DJ 
A1  - Teitei, T 
T1  - Simple pyrimidines. VII. The fine structure of 4,6-dihydroxypyrimidine
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1964
VL  - 17
IS  - 5
SP  - 567
EP  - 572
KW  - 
UR  - https://doi.org/10.1071/CH9640567 
N2  - The ultraviolet spectrum of 4,6-dihydroxypyrimidine is compared with those of N-, O-, and 5-alkylated derivatives of fixed structures corresponding to possible tautomeric forms. In contrast to earlier suggestions in the literature, it is concluded that an aqueous solution consists essentially of 1,4,5,6-tetrahydro-4,6-dioxopyrimidine in equilibrium with a smaller amount of 1,4-dihydro-6-hydroxy-4-oxo-pyrimidine. The existence of the active 6-methylene grouping within the ring is confirmed chemically by a ready condensation of benzaldehyde with the pyrimidine in aqueous solution. 
ER  -

