化学性质
纯品为无色针状结晶,具有刺激性气味和极强的催泪性。熔点为79℃,沸点为223.5℃。它能溶于水、乙醇和乙醚,并微溶于其他溶剂。这种物质不稳定,久贮易变质,遇铁会变色,导致含量下降。
用途
作为丁酮酰化剂,用于合成丁酮类衍生物;广泛应用于医药和染料的中间体,可制备吡唑酮、苯甲基吡唑酮等化合物,并是安乃近和安替比林的重要原料。
生产方法
通过将冰醋酸裂解为乙烯酮,然后使乙烯酮聚合生成双乙烯酮,再加入氨水进行氨化,最终得到乙酰乙酰胺。其原料消耗定额为:每吨产品需要1638千克95%的冰醋酸和950千克20%的氨水。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | α-Methyl-acetoacetamid | 4433-76-5 | C5H9NO2 | 115.132 |
2-氯-3-氧代-丁酰胺 | 2-chloro-3-oxobutanamide | 67271-66-3 | C4H6ClNO2 | 135.55 |
—— | 2-bromoacetoacetic acid amide | 1021186-11-7 | C4H6BrNO2 | 180.001 |
—— | 4-oxo-pentanamide | 22377-14-6 | C5H9NO2 | 115.132 |
A library of dihydropyrimidinones was synthesized via a “one-pot” three component Biginelli reaction using different aldehydes in combination with β-dicarbonyl compounds and urea. Selected 2-thiooxo and 2-imino analogs were also obtained with the Biginelli reaction from thiourea and guanidine hydrochloride, respectively. The products were screened in vitro for their β-secretase inhibitory activity. The majority of the compounds resulted to be active, with IC50 in the range 100 nM–50 μM.