tert-butyl 2,5-dimethylpiperidine-1-carboxylate

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 哌啶类
• 英文名称: tert-butyl 2,5-dimethylpiperidine-1-carboxylate
• 化学式: C₁₂H₂₃NO₂
• 分子量: 213.32
• InChiKey: DVMPHJLASZEEFS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  29.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  2,5-二甲基吡啶 、 二碳酸二叔丁酯 在 chloro(1,5-cyclooctadiene)rhodium(I) dimer 、 ammonia borane 、 三乙胺 作用下， 以 2,2,2-三氟乙醇 为溶剂， 反应 24.0h， 以91%的产率得到tert-butyl 2,5-dimethylpiperidine-1-carboxylate
  参考文献：
  名称：

  芳烃和杂芳烃的催化转移氢化。

  摘要：

  转移氢化反应对于在温和的反应条件下还原各种分子非常重要。迄今为止，这种类型的反应仅成功地用于烯烃，炔烃和极化的不饱和化合物，例如酮，亚胺，吡啶等。从未描述过通过转移氢化还原苯衍生物的方法，这很可能是由于高使这些化合物脱芳香化所需的能量屏障。在此背景下，我们开发了一种催化转移氢化反应，用于还原苯衍生物和杂芳烃，从而在不需要压缩氢气的情况下，在室温下形成带有各种官能团的复杂三维支架。

  DOI：

  10.1002/chem.202002777

文献信息

• .alpha.-Lithioamine synthetic equivalents: syntheses of diastereoisomers from Boc derivatives of cyclic amines
  作者：Peter Beak、Won Koo Lee

  DOI：10.1021/jo00057a024

  日期：1993.2

  Sequences of alpha'-lithiations and electrophilic substitutions of Boc-pyrrolidines, Boc-piperidines, and Boc-hexahydroazepines that provide compounds which are substituted adjacent to nitrogen are reported, and the pathways of the reactions are discussed. By this methodology monosubstituted 2 and disubstituted 2,4,2,6, and 2,5 Boc-piperidines are obtained as single or separable diastereoisomers consistent with equatorial lithiations and retentive electrophilic substitution in chair conformations. Both cis and trans 2,6-disubstituted diastereoisomers can be prepared, and control of diastereoselectivity is demonstrated by syntheses of solenopsin A, a 2,6-trans-disubstituted piperidine, and of Boc-dihydropinidine, a 2,6-cis-disubstituted piperidine. In the case of 3-methoxy-Boc-piperidine elimination of methoxide occurs upon lithiation, and with cis-2,4-disubstituted Boc-piperidines the electrophile is introduced with trans stereochemistry at C-6. These reactions are suggested to involve twist boat conformations consistent with an X-ray crystal structure of 2-methyl-6-(trimethylstannyl)-4-phenyl-N-Boc-piperidine. Boc-pyrrolidine lithiates more rapidly than Boc-piperidine, provides 2-substituted products with electrophiles, and on further lithiation-substitution gives 2,5-cis- and -trans-substituted products. Boc-perhydroazepine provides 2-substituted products by the sequence and on further lithiation-substitution gives 2,7-trans-disubstituted products.
• Catalytic Transfer Hydrogenation of Arenes and Heteroarenes
  作者：Coralie Gelis、Arne Heusler、Zackaria Nairoukh、Frank Glorius

  DOI：10.1002/chem.202002777

  日期：2020.11.6

  Transfer hydrogenation reactions are of great interest to reduce diverse molecules under mild reaction conditions. To date, this type of reaction has only been successfully applied to alkenes, alkynes and polarized unsaturated compounds such as ketones, imines, pyridines, etc. The reduction of benzene derivatives by transfer hydrogenation has never been described, which is likely due to the high energy

  转移氢化反应对于在温和的反应条件下还原各种分子非常重要。迄今为止，这种类型的反应仅成功地用于烯烃，炔烃和极化的不饱和化合物，例如酮，亚胺，吡啶等。从未描述过通过转移氢化还原苯衍生物的方法，这很可能是由于高使这些化合物脱芳香化所需的能量屏障。在此背景下，我们开发了一种催化转移氢化反应，用于还原苯衍生物和杂芳烃，从而在不需要压缩氢气的情况下，在室温下形成带有各种官能团的复杂三维支架。