Barbituric acid

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Barbituric acid
Barbituric acid
Chemical name 2,4,6(1H,3H,5H)-Pyrimidinetrione
Chemical formula C4H4N2O3
Molecular mass 128.09 g/mol
Melting point 245 °C
Boiling point 260 °C
Density g/cm3
CAS number 67-52-7
SMILES O=C1CC(=O)NC(=O)N1
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
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Barbituric acid or malonylurea or 4-hydroxyuracyl is an organic compound based on a pyrimidine heterocyclic skeleton. It is an odorless powder soluble in hot water. Barbituric acid is the parent compound of a large class of barbiturates that have central nervous system depressant properties although barbituric acid itself is not pharmacologically active. The compound was discovered by the German chemist Adolf von Baeyer in 1864 by combining urea and malonic acid in a condensation reaction. Malonic acid has since been replaced by diethyl malonate.

The synthesis of barbituric acid from urea and malonic acid

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