N-(4-methoxybenzyl)-N-hydroxy-1-(methylamino)propan-2-amine | 1349708-38-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: N-(4-methoxybenzyl)-N-hydroxy-1-(methylamino)propan-2-amine
• 英文别名: N-methyl-2-(hydroxy(4-(methoxy)benzyl)amino)propan-1-amine；2-(hydroxy(4-methoxybenzyl)amino)-N-methylpropan-1-amine；N-[(4-methoxyphenyl)methyl]-N-[1-(methylamino)propan-2-yl]hydroxylamine
• CAS: 1349708-38-8
• 化学式: C₁₂H₂₀N₂O₂
• 分子量: 224.303
• InChiKey: LHAUBGSPMHWPSQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  16
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  44.7
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  N-(4-甲氧基苄基)羟胺 、 二烯丙基胺 在 聚合甲醛 作用下， 以 叔丁醇 为溶剂， 反应 24.0h， 以80%的产率得到N-(4-methoxybenzyl)-N-hydroxy-1-(methylamino)propan-2-amine
  参考文献：
  名称：

  Catalysis through Temporary Intramolecularity: Mechanistic Investigations on Aldehyde-Catalyzed Cope-type Hydroamination Lead to the Discovery of a More Efficient Tethering Catalyst

  摘要：

  Mechanistic investigations on the aldehyde-catalyzed intermolecular hydroamination of allylic amines using N-alkylhydroxylamines are presented. Under the reaction conditions, the presence of a specific aldehyde catalyst allows formation of a mixed aminal intermediate, which permits intramolecular Cope-type hydroamination. The reaction was determined to be first-order in both the aldehyde catalyst (alpha-benzyloxyacetaldehyde) and the allylic amine. However, the reaction displays an inverse order behavior in benzylhydroxylamine, which reveals a significant off-cycle pathway and highlights the importance of an aldehyde catalyst that promotes a reversible aminal formation. Kinetic isotope effect experiments suggest that hydroamination is the rate-limiting step of this catalytic cycle. Overall, these results enabled the elaboration of a more accurate catalytic cycle and led to the development of a more efficient catalytic system for alkene hydroamination. The use of 5-10 mol % of paraformaldehyde proved more effective than the use of 20 mol % of a-benzyloxyacetaldehyde, leading to high yields of intermolecular hydroamination products within 24 h at 30 degrees C.

  DOI：

  10.1021/ja303320x

文献信息

• A Catalytic Tethering Strategy: Simple Aldehydes Catalyze Intermolecular Alkene Hydroaminations
  作者：Melissa J. MacDonald、Derek J. Schipper、Peter J. Ng、Joseph Moran、André M. Beauchemin

  DOI：10.1021/ja208867g

  日期：2011.12.21

  Herein we describe a catalytic tethering strategy in which simple aldehyde precatalysts enable, through temporary intramolecularity, room-temperature intermolecular hydroamination reactivity and the synthesis of vicinal diamines. The catalyst allows the formation of a mixed aminal from an allylic amine and a hydroxylamine, resulting in a facile intramolecular hydroamination event. The promising enantioselectivities

  在本文中，我们描述了一种催化束缚策略，其中简单的醛预催化剂通过临时分子内、室温分子间加氢胺化反应和邻二胺的合成来实现。该催化剂允许由烯丙胺和羟胺形成混合胺醛，从而导致容易的分子内加氢胺化事件。用手性醛获得的有希望的对映选择性也突出了这种催化束缚方法在不对称催化中的潜力，并证明仅依赖临时分子内的有效对映诱导是可能的。
• Hydrogen Bonding Directed Intermolecular Cope-Type Hydroamination of Alkenes
  作者：Shu-Bin Zhao、Eric Bilodeau、Valérie Lemieux、André M. Beauchemin

  DOI：10.1021/ol3023177

  日期：2012.10.5

  Intermolecular hydroamination of unactivated alkenes represents a significant synthetic challenge. An efficient Cope-type hydroamination is achieved under mild conditions for reactions of N-alkylhydroxylamines with allylic amines, using hydrogen bonding to achieve increased reactivity and high regioselectivity. This approach provides a number of highly functionalized vicinal diamine motifs as Markovnikov

  未活化烯烃的分子间加氢胺化是一个重大的合成挑战。N-烷基羟胺与烯丙基胺在温和条件下进行有效的Cope型加氢胺化反应，使用氢键可提高反应活性和区域选择性。这种方法提供了许多高度功能化的邻位二胺基序作为Markovnikov加成产物。