Methods Pyridine-barbituric acid spectrophotometry was employed and some parameters including the pH value of the phosphate buffer, the time of color reaction, temperature, the concentration of chloramine T, the proportion of the phosphate buffer, the proportion of color agent and the maximum absorption wavelength were optimized.

Ionie liquids used as microwave absorbent to promote the konoevenagel condensation reaction of benzaldehyde and barbituric acid;

Theoretical studies on tautomerism of barbituric acid;

Synthesis of 5-alkylene barbituric acid derivatives in ionic liquid 1-butyl-3-methyl imidazolum hexafluorophosphoric acid;

Grinding a mixture of benzaldehydes, babituric acid and ZnCl 2 at room temperature (without any solvents) gave 5-arylidene babituric acid in high yields, providing a simple and efficient route to these compounds.

Synthesis of 5-[(4-dimethylaminophenyl) methylene]-babituric acid in water is reported in this paper.

The synthesis of 5-alkylidene babituric acid by condensation of aromatic aldehydes and babituric acid is described.

Two cyclopropyl spiro thiobarbiturs with rigid configurations were designed,synthesized and(characterized) by IR and NMR.