(E)-ethyl 2-acetyl-3-amino-5-phenylpent-2-enoate | 1421276-95-0

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 酮酸及其衍生物
• 英文名称: (E)-ethyl 2-acetyl-3-amino-5-phenylpent-2-enoate
• CAS: 1421276-95-0
• 化学式: C₁₅H₁₉NO₃
• 分子量: 261.321
• InChiKey: GXSAWBKKMMSNHT-BUHFOSPRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.98
• 重原子数：
  19.0
• 可旋转键数：
  6.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  69.39
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为产物：
  描述：

  乙酰乙酸乙酯 在 溴化二甲基溴化锍 、 sodium carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 2.5h， 生成 (E)-ethyl 2-acetyl-3-amino-5-phenylpent-2-enoate
  参考文献：
  名称：

  通过声波加速埃森莫瑟偶联反应：烯胺酮的有效合成†

  摘要：

  烯胺酮通常通过Eschenmoser偶联反应制备。反应的持续时间通常很长。在这里，我们描述了超声处理如何加速该反应。反应条件为伯，仲和叔硫酰胺与α-溴羰基化合物的偶联提供了一种有效的方法。

  DOI：

  10.1039/c2ra22033d

文献信息

• Enaminones via Ruthenium-Catalyzed Coupling of Thioamides and α-Diazocarbonyl Compounds
  作者：Naga D. Koduri、Zhiguo Wang、Garrett Cannell、Kate Cooley、Tsebaot Mesfin Lemma、Kun Miao、Michael Nguyen、Bram Frohock、Maria Castaneda、Halee Scott、Dragos Albinescu、Syed R. Hussaini

  DOI：10.1021/jo5011312

  日期：2014.8.15

  Enaminones can be prepared via the Rh2(OAc)4-catalyzed coupling of α-diazocarbonyl compounds with thioamides. However, rhodium is the most expensive and least abundant among the dominant precious metals used for catalysis. Furthermore, a very limited substrate scope is known for the intermolecular rhodium catalyzed coupling reaction. Therefore, there is a need to find a more economical catalyst substitute with a broad substrate scope. In this paper, we describe the use of Ru(II) catalysts for the synthesis of enaminones. The reaction can be performed efficiently with the Grubbs first-generation catalyst or [(Ph)3P]3RuCl2 in a sealed tube. Both catalysts are much less expensive than Rh2(OAc)4. Secondary and tertiary thioamides, when reacted with α-diazodiesters, α-diazoketoesters, α-diazodiketones, and α-diazomonoketones give enaminones. Primary thioamides give thiazole derivatives when reacted with α-diazomonoketones. However, with other diazo compounds, primary thioamides also give enaminones. All enaminones are obtained in good yields and with good diastereoselectivity. Accordingly, the method described in this paper is an efficient and economical alternative to the Rh2(OAc)4-catalyzed coupling process.