4-ethoxy-2,2,6,6-tetramethylpiperidin-1-oxy | 123373-68-2

• 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: 4-ethoxy-2,2,6,6-tetramethylpiperidin-1-oxy
• CAS: 123373-68-2
• 化学式: C₁₁H₂₂NO₂
• 分子量: 200.301
• InChiKey: GQCYGRRMOOBNGG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  14
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  13.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4-ethoxy-2,2,6,6-tetramethylpiperidin-1-oxy 在 盐酸 作用下， 以 乙醇 为溶剂， 反应 0.5h， 以63%的产率得到4-Ethoxy-2,2,6,6-tetramethyl-piperidin-1-ol; hydrochloride
  参考文献：
  名称：

  Studies of Structure−Activity Relationship of Nitroxide Free Radicals and Their Precursors as Modifiers Against Oxidative Damage

  摘要：

  The protective effects of stable nitroxides, as well as their hydroxylamine and amine precursors, have been tested in Chinese hamster V79 cells subjected to H2O2 exposure at fixed concentration or exposure to ionizing radiation. Cytotoxicity was evaluated by monitoring the viability of the cells assessed by the clonogenic assay. The compounds tested at fixed concentration varied in terms of ring size, oxidation state, and ring substituents. Electrochemical studies were carried out to measure the redox midpoint potentials. The studies show that in the case of protection against H2O2 exposure, the protection was determined by the ring size, oxidation state, and redox midpoint potentials. In general the protection factors followed the order nitroxides > hydroxylamines > amines. Both the six-membered ring nitroxides and substituted five-membered ring nitroxides were efficient protectors. For six-membered ring nitroxides, the compounds exhibiting the lowest midpoint potentials exhibited maximal protection. In the case of X-radiation, nitroxides were the most protective though some hydroxylamines were also efficient. The amines were in some cases found to sensitize the toxicity of aerobic radiation exposure. The protection observed by the nitroxides was not dependent on the ring size. However, the ring substituents had significant influence on the protection. Compounds containing a basic side chain were found to provide enhanced protection. The results in this study suggest that these compounds are novel antioxidants which can provide cytoprotection in mammalian cells against diverse types of oxidative insult and identify structural determinants optimal for protection against individual types of damage.

  DOI：

  10.1021/jm9802160

文献信息

• 1,3-Difunctionalization of β-Alkyl Nitroalkenes via Combination of Lewis Base Catalysis and Radical Oxidation
  作者：Ye Wang、Lei Zheng、Xiaodong Shi、Yunfeng Chen

  DOI：10.1021/acs.orglett.0c04106

  日期：2021.2.5

  catalyst, β-alkyl-substituted nitroalkenes could be readily converted into allylic nitro compounds. Examples of either C-1 or C-3 functionalization methods have been reported through nitro-elimination, giving alkene products. In this work, successful 1,3-difunctionalization was achieved through a synergetic Lewis base catalysis and TBHP radical oxidation, giving vinylic alkoxyamines in good to excellent

  用路易斯碱催化剂处理后，β-烷基取代的硝基烯烃很容易转化为烯丙基硝基化合物。已经通过硝基消除报道了C-1或C-3官能化方法的实例，得到烯烃产物。在这项工作中，通过协同的Lewis碱催化和TBHP自由基氧化，成功地实现了1,3-双官能团化，从而得到乙烯基烷氧基胺，收率好至极佳。这项工作进一步扩展了β-烷基硝基烯烃的一般合成应用。
• Studies of Structure−Activity Relationship of Nitroxide Free Radicals and Their Precursors as Modifiers Against Oxidative Damage
  作者：Murali C. Krishna、William DeGraff、Olga H. Hankovszky、Cecília P. Sár、Tamás Kálai、József Jekő、Angelo Russo、James B. Mitchell、Kálmán Hideg

  DOI：10.1021/jm9802160

  日期：1998.8.1

  The protective effects of stable nitroxides, as well as their hydroxylamine and amine precursors, have been tested in Chinese hamster V79 cells subjected to H2O2 exposure at fixed concentration or exposure to ionizing radiation. Cytotoxicity was evaluated by monitoring the viability of the cells assessed by the clonogenic assay. The compounds tested at fixed concentration varied in terms of ring size, oxidation state, and ring substituents. Electrochemical studies were carried out to measure the redox midpoint potentials. The studies show that in the case of protection against H2O2 exposure, the protection was determined by the ring size, oxidation state, and redox midpoint potentials. In general the protection factors followed the order nitroxides > hydroxylamines > amines. Both the six-membered ring nitroxides and substituted five-membered ring nitroxides were efficient protectors. For six-membered ring nitroxides, the compounds exhibiting the lowest midpoint potentials exhibited maximal protection. In the case of X-radiation, nitroxides were the most protective though some hydroxylamines were also efficient. The amines were in some cases found to sensitize the toxicity of aerobic radiation exposure. The protection observed by the nitroxides was not dependent on the ring size. However, the ring substituents had significant influence on the protection. Compounds containing a basic side chain were found to provide enhanced protection. The results in this study suggest that these compounds are novel antioxidants which can provide cytoprotection in mammalian cells against diverse types of oxidative insult and identify structural determinants optimal for protection against individual types of damage.