N-Boc-2-butyl-5-methylpyrrole | 1234906-58-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯
• 英文名称: N-Boc-2-butyl-5-methylpyrrole
• 英文别名: Tert-butyl 2-butyl-5-methylpyrrole-1-carboxylate
• CAS: 1234906-58-1
• 化学式: C₁₄H₂₃NO₂
• 分子量: 237.342
• InChiKey: ASMVKYGWUFDIRY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.64
• 拓扑面积：
  31.2
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  N-Boc-2-aminonon-4-yn-3-ol 在 copper dichloride 作用下， 以 甲醇 为溶剂， 反应 15.0h， 以56%的产率得到N-Boc-2-butyl-5-methylpyrrole
  参考文献：
  名称：

  通过CuCl 2催化3- yne -1,2-二醇和N -Boc-或N-甲苯磺酰基-1-氨基-3-yn-2-ols的杂环脱水反应，轻松合成取代的呋喃和吡咯

  摘要：

  一种简单经济的取代呋喃和吡咯的合成方法，该方法通过无配体的CuCl 2催化的易获得的3-炔-1,2-二醇和N - Boc-或N-甲苯磺酰基-1-氨基-3-yn-的杂环脱水分别给出了2-ols。反应在MeOH中于80-100°C下进行1-24h，并以53-99％的分离产率得到相应的杂环衍生物。

  DOI：

  10.1016/j.tetlet.2010.05.001

文献信息

• Copper-Catalyzed Synthesis of Substituted Furans and Pyrroles by Heterocyclodehydration and Tandem Heterocyclodehydration–Hydration of 3-Yne-1,2-diols and 1-Amino-3-yn-2-ol Derivatives
  作者：Bartolo Gabriele、Lucia Veltri、Pierluigi Plastina、Raffaella Mancuso、Mabel V. Vetere、Vito Maltese

  DOI：10.1021/jo400533j

  日期：2013.5.17

  CuCl2-catalyzed heterocyclodehydration of readily available 3-yne-1,2-diols and 1-amino-3-yn-2-ol derivatives afforded substituted furans and pyrroles, respectively, in good to high yields (53-99%) under mild conditions (MeOH as the solvent, 80-100 degrees C, 1-24 h). In the case of 2,2-dialkynyl-1,2-diols, bearing an additional alkynyl substituent at C-2, a cascade process, corresponding to copper-catalyzed heterocyclodehydration followed by acid-catalyzed hydration of the triple bond, was realized when the reaction was carried out in the presence of both CuCl2 and TsOH, leading to 3-acylfurans in one step and high yields (75-84%). Under the same conditions, N-Boc-2-alkynyl-1-amino-3-yn-2-ols were converted into the corresponding N-unsubstituted 3-acylpyrroles in low to fair yields (19-59%). However, working in the presence of added water and a large excess of CO2 (40 atm), in addition to CuCl2 and TsOH, caused a significant improvement of the yields of 3-acylpyrroles (68-87%), thus making the method of general synthetic applicability.