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 、 硼烷铵络合物 、 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.