3-d]pyrimidin-4(4H)-one 1 (1), chloroacetic acid, and a proper aldehyde. Compound 2a react with hydroxyl amine hydrochloride to give corresponding oxime derivative 4. Reaction of 1 with 3-chloropent-2, 4-dione in ethanolic sodium hydroxide solution yielded S-acetyl acetone derivative 5b. The latter compound reacted with hydrazines affording the 2-pyrazolthio 6. Compound 5b reacted with urea and thiourea to give 7a
在一锅反应中,2-芳基-6,7,8,9-四氢己烯
噻吩并[2,3-d]
嘧啶-3(3H),5(5H)-二酮2a、b由反应制备2-thioxo-5,6,7,8-四氢己烯
噻吩并[2,3-d]
嘧啶-4(4H)-one 1 (1)、
氯乙酸和适当的醛的三元混合物。化合物2a与
盐酸羟胺反应得到相应的
肟衍
生物4。1与3-
氯戊-2,4-二酮在
氢氧化钠乙醇溶液中反应得到S-
乙酰丙酮衍
生物5b。后一化合物与
肼反应得到2-
吡唑硫代6。化合物5b与
尿素和
硫脲反应得到7a、b。此外,化合物 5b 与
乙酸酐/
吡啶混合物在沸腾时进行环化,得到
噻唑并
嘧啶衍
生物 8。酮化合物 8 形成
肟 9。此外,