Fa. Yassin et al., SYNTHESIS AND REACTIONS OF 3-AMINO-2-METHYL-4(3H)-QUINAZOLINONE DERIVATIVES, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 33(12), 1994, pp. 1193-1196
3-Amino-2-methyl-4(3H)-quinazolinone (2) has been synthesized by treat
ing 2-methylbenzoxazinone (1) with hydrazine hydrate. Reaction of quin
azolinone (2) with phenyl isothiocyanate and phenyl isocyanate furnish
the corresponding aminocarbothiamide and aminocarbamide derivatives (
3 and 5), respectively, which on reaction with malonic acid in acetyl
chloride afford thiobarbituric and barbituric acid derivatives (4 and
6), respectively. Behaviour of compound 5 towards different aldehydes,
ketones and imides have been investigated.