3-acetyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy radical | 35865-15-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡咯啉
• 英文名称: 3-acetyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy radical
• CAS: 35865-15-7
• 化学式: C₁₀H₁₆NO₂
• 分子量: 182.243
• InChiKey: GQNINJDJTVCBPT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.7
• 拓扑面积：
  21.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-acetyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy radical 在 盐酸 作用下， 以 乙醇 为溶剂， 反应 0.5h， 以80%的产率得到1-(1-Hydroxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)-ethanone; 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
• 作为产物：
  描述：

  3-[(乙氧基羰基)羰氧基]-2,5-二氢-2,2,5,5-四甲基-1H-吡咯-1-氧基 以 乙醚 、 硫酸 、 水 、 溶剂黄146 为溶剂， 反应 4.0h， 生成 3-acetyl-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy radical
  参考文献：
  名称：

  Methods for preparation of heterobifunctional nitroxides: α,β-unsaturated ketones, β-ketoesters, cyano-nitro-derivatives

  摘要：

  1-oxyl-2,2,5,5-四甲基-3-吡咯烯-3-甲醛（1）、1-oxyl-2,2,5,5-四甲基-3-氰基-3-吡咯烯（2）、乙基1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-羰基碳酸酯（3）和N-（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-羰基）咪唑酰亚胺（4）与几种亲核试剂（二烷基镉、二乙基苏丹基丙二酸酯、乙基氢基丙二酸酯镁烯醇酸盐、硝基甲烷阴离子）进行反应，以获得α，β-不饱和酮，β-酮酯或共轭反应产物。醛1与几种甲基酮（乙酰亚甲基三苯基膦、苯乙酮、2-乙酰吡啶、4-苯基-3-丁炔-2-酮）反应，得到自旋标记的多烯酮。4-（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-基）-2-丁烯-2-酮（24a）与乙二胺的反应产生7,14-双（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-基）-5,12-二甲基-1,4,8,11-四氮杂十四烷-7,14-二烯双自由基（25）。

  DOI：

  10.1139/v82-208

文献信息

• New mono- and difunctionalized 2,2,5,5-tetramethylpyrrolidine- and Δ³-pyrroline-1-oxyl nitroxide spin labels
  作者：John F. W. Keana、Kálmán Hideg、G. Bruce Birrell、Olga H. Hankovszky、George Ferguson、Masood Parvez

  DOI：10.1139/v82-209

  日期：1982.6.15

  spin labels have been prepared. Nitroxide mesylate 5 and p-hydroxyacetophenone gave 6 which was selectively brominated with cupric bromide to give the alkylating agent 7. The more water soluble phenacyl bromide analogue 17 was prepared either via the route 8 → 11 → 17 or else via the route 15 → 16 → 11 → 17. Preliminary results indicate that toward aconitase, nitroxide alkylating agent 17 behaves similarly

  已经制备了几种新的氮氧化物自旋标签。硝基甲磺酸盐 5 和对羟基苯乙酮得到 6，其用溴化铜选择性溴化得到烷化剂 7。 水溶性更好的苯甲酰溴类似物 17 通过路线 8 → 11 → 17 或通过路线 15 → 16 制备→ 11 → 17. 初步结果表明，对于乌头酸酶，硝基氧烷化剂 17 的行为与苯甲酰溴相似。着眼于作为饱和转移 esr 自旋标记的应用，制备了几种新的双官能氮氧化物。HCN 与 11 共轭加成得到 18，其与对叠氮苯甲醛缩合得到光不稳定的 19。叠氮化物 20 可以类似地直接从 11 制备。醛 15 与对叠氮苯乙酮缩合得到叠氮化物 21。使该物质与血红蛋白反应。光解后，esr 光谱移动分量显着减少，表明在不止一个位点发生共价连接。共轭加成...
• Synthesis and Dehydrobromination of α-Bromo Aldehyde and Ketone Nitroxyl Radical Spin Labels
  作者：H. Olga Hankovszky、Kálmán Hideg、P. Cecilla Sár、M. Judit Lovas、Gyula Jerkovich

  DOI：10.1055/s-1990-26788

  日期：——

  Various types of α-bromo aldehyde and ketone derivatives of nitroxyl radicals can be prepared in a selective bromination reaction with pyrrolidone hydrotribromide in the presence of a double bond. The saturated α-bromo aldehydes are dehydrobrominated with 1,8-diazabicyclo [5,4,0]undec-7-ene.

  在双键存在的情况下，通过与吡咯烷酮氢溴酸盐进行选择性溴化反应，可以制备各种类型的δ-溴醛和酮衍生物。饱和δ±-溴醛与 1,8- 二氮杂双环 [5,4,0]undec-7-ene 发生脱氢溴化反应。
• 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.
• Methods for preparation of heterobifunctional nitroxides: α,β-unsaturated ketones, β-ketoesters, cyano-nitro-derivatives
  作者：H. Olga Hankovszky、Kálmán Hideg、László Lex、Gyula Kulcsár、H. Anna Halász

  DOI：10.1139/v82-208

  日期：1982.6.15

  The reactions of 1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-carboxaldehyde (1), 1-oxyl-2,2,5,5-tetramethyl-3-cyano-3-pyrroline (2), ethyl 1-oxy(-2,2,5,5-tetramethyl-3-pyrroline-3-carbonyl carbonate (3), and N-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-carbonyl)imidazolide (4) are investigated with several nucleophiles (dialkylcadmium, diethyl sodio-malonate, magnesium enolate of ethyl hydrogen malonate, nitromethane-anion) to obtain α,β-unsaturated ketones, β-ketoesters, or conjugated reaction products. Aldehyde 1 is reacted with several methyl ketones (acetylmethylene-triphenylphosphorane, acetophenone, 2-acetylpyridine, 4-phenyl-3-butyn-2-one) to give spin labeled polyenones. The reaction of 4-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-yl)-2-buten-2-one (24a) with ethylenediamine gives 7,14-bis-(1-oxyl-2,2,5,5-tetramethyl-3-pyrroline-3-yl)-5,12-dimethyl-1,4,8,11-tetraazatetradeca-7,14-diene biradical (25).

  1-oxyl-2,2,5,5-四甲基-3-吡咯烯-3-甲醛（1）、1-oxyl-2,2,5,5-四甲基-3-氰基-3-吡咯烯（2）、乙基1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-羰基碳酸酯（3）和N-（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-羰基）咪唑酰亚胺（4）与几种亲核试剂（二烷基镉、二乙基苏丹基丙二酸酯、乙基氢基丙二酸酯镁烯醇酸盐、硝基甲烷阴离子）进行反应，以获得α，β-不饱和酮，β-酮酯或共轭反应产物。醛1与几种甲基酮（乙酰亚甲基三苯基膦、苯乙酮、2-乙酰吡啶、4-苯基-3-丁炔-2-酮）反应，得到自旋标记的多烯酮。4-（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-基）-2-丁烯-2-酮（24a）与乙二胺的反应产生7,14-双（1-氧（-2,2,5,5-四甲基-3-吡咯烯-3-基）-5,12-二甲基-1,4,8,11-四氮杂十四烷-7,14-二烯双自由基（25）。