| 126503-19-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 哌啶类
• CAS: 126503-19-3；146388-36-5
• 化学式: C₁₉H₂₉NO₄
• 分子量: 335.444
• InChiKey: CCXFUBXJOUHOJZ-XKQJLSEDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.91
• 重原子数：
  24.0
• 可旋转键数：
  3.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.63
• 拓扑面积：
  59.0
• 氢给体数：
  1.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  在 sodium hydroxide 作用下， 以 乙醇 为溶剂， 以91%的产率得到
  参考文献：
  名称：

  .alpha.-Lithioamine synthetic equivalents: syntheses of diastereoisomers from the Boc-piperidines

  摘要：

  DOI：

  10.1021/jo00296a008
• 作为产物：
  描述：

  1-Boc-哌啶 在 四甲基乙二胺 、 仲丁基锂 作用下， 反应 3.0h， 生成
  参考文献：
  名称：

  .alpha.-Lithioamine synthetic equivalents: syntheses of diastereoisomers from Boc derivatives of cyclic amines

  摘要：

  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.

  DOI：

  10.1021/jo00057a024