Dimethyl 2-Methylcyclopentane-1,1-dicarboxylate | 120790-38-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: Dimethyl 2-Methylcyclopentane-1,1-dicarboxylate
• 英文别名: 2-methylcyclopentane-1,1-dicarboxylic acid dimethyl ester
• CAS: 120790-38-7
• 化学式: C₁₀H₁₆O₄
• 分子量: 200.235
• InChiKey: LPJFDJXQHDTPBY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  dimethyl 2-(pent-4'-enyl)malonate 在 manganese(III) acetate 作用下， 以 乙醇 为溶剂， 反应 24.0h， 以66%的产率得到Dimethyl 2-Methylcyclopentane-1,1-dicarboxylate
  参考文献：
  名称：

  用于合成γ-内酯的氧化自由基环化。

  摘要：

  乙酸锰（III）与三氟甲磺酸铜（II）的结合使用可从4-戊烯基丙二酸酯合成[3.3.0]-双环γ-内酯，收率极高。

  DOI：

  10.1039/b802473a

文献信息

• Visible-Light Photoredox Catalysis in Flow
  作者：Joseph W. Tucker、Yuan Zhang、Timothy F. Jamison、Corey R. J. Stephenson

  DOI：10.1002/anie.201200961

  日期：2012.4.23

  Photoredox catalysis: A variety of organic transformations mediated by visible‐light‐active photoredox catalysts have been conducted in a photochemical flow reactor. The reactor design is very simple and can be easily implemented in any laboratory (see picture). In addition, this reactor afforded a marked increase in the reaction rate compared to those observed in typical batch (round bottom flask)

  光氧化还原催化：由可见光活性光氧化还原催化剂介导的各种有机转化已在光化学流动反应器中进行。该反应器设计非常简单，可以在任何实验室轻松实施（见图）。此外，与典型间歇式（圆底烧瓶）反应器中观察到的反应速率相比，该反应器的反应速率显着增加。
• Perkin–Markovnikov Type Reaction Initiated with Electrogenerated Superoxide Ion
  作者：Fumihiro Ojima、Tetsuo Osa

  DOI：10.1246/bcsj.62.3187

  日期：1989.10

  The cyclic condensation of active methylene compounds such as diethyl malonate, dimethyl malonate, ethyl acetoacetate, or acetylacetone and dibromoalkanes such as 1,2-dibromoethane, 1,3-dibromopropane, 1,4-dibromobutane, 1,5-dibromopentane, 1,6-dibromohexane, 1,3-dibromobutane, or 1,4-dibromopentane with electrogenerated superoxide ion was studied electrochemically in N,N-dimethylformamide (DMF) using cyclic voltammetry (CV) and controlled potential macro-electrolysis. The CV shows that electrogenerated superoxide ion reacts with both active methylene compounds and dibromoalkanes in the dissolved oxygen medium. Controlled potential macro-electrolysis of the above components generally yielded cycloalkanes as the main products. In comparison, the chemical method using sodium ethoxide was also carried out. Two reaction mechanisms via the proton abstraction of active methylene compounds with electrogenerated superoxide ion and via the nucleophilic attack of the superoxide ion on dibromoalkanes are presented.

  活性亚甲基化合物，如二乙基马来酸酯、二甲基马来酸酯、乙酰乙酸乙酯或乙酰乙酮，与二溴烷烃，如1,2-二溴乙烷、1,3-二溴丙烷、1,4-二溴丁烷、1,5-二溴戊烷、1,6-二溴己烷、1,3-二溴丁烷或1,4-二溴戊烷的循环缩合反应，采用循环伏安法（CV）和控制电位宏电解法在N,N-二甲基甲酰胺（DMF）中进行了电化学研究。CV结果表明，电生超氧阴离子在溶解氧介质中与活性亚甲基化合物和二溴烷烃均发生反应。上述组分的控制电位宏电解通常以环烷烃作为主要产物。相比之下，使用乙醇钠的化学方法也进行了研究。提出了两种反应机理：一种是活性亚甲基化合物与电生超氧阴离子的质子抽取反应，另一种是超氧阴离子对二溴烷烃的亲核攻击反应。
• Tin-free radical cyclization reactions initiated by visible light photoredox catalysis
  作者：Joseph W. Tucker、John D. Nguyen、Jagan M. R. Narayanam、Scott W. Krabbe、Corey R. J. Stephenson

  DOI：10.1039/c0cc00981d

  日期：——

  Herein, we report an advancement in the application of visible light photoredox catalysts in a classic free radical mediated reaction, cyclization onto unactivated pi-systems. The reactive radical intermediate is generated by the single electron reduction of an activated C-Br bond by an electron-rich redox catalyst afforded by a visible light induced catalytic cycle.

  在这里，我们报告了在经典的自由基介导的反应中，可见光光氧化还原催化剂的应用进展，环化到未活化的pi系统上。反应性自由基中间体是由可见光诱导的催化循环提供的富电子氧化还原催化剂将活化的C-Br键单电子还原而生成的。
• THF: An Efficient Electron Donor in Continuous Flow Radical Cyclization Photocatalyzed by Graphitic Carbon Nitride
  作者：Magdalena Woźnica、Nicolas Chaoui、Soraya Taabache、Siegfried Blechert

  DOI：10.1002/chem.201404440

  日期：2014.11.3

  Mesoporous graphitic carbon nitride (mpg‐C3N4) was found to be an efficient heterogeneous photocatalyst for the metal‐free radical cyclization of 2‐bromo‐1,3‐dicarbonyl compounds. Reactions leading to functionalized cyclopentanes proceed under mild conditions and can be conducted in a continuous flow photoreactor. Compared to the batch reaction, the use of a continuous flow reactor resulted in a significant

  发现介孔石墨碳氮化物（mpg-C 3 N 4）是2-溴-1,3-二羰基化合物的金属自由基环化的有效多相光催化剂。导致官能化的环戊烷的反应在温和的条件下进行，可以在连续流动的光反应器中进行。与分批反应相比，使用连续流动反应器可显着减少反应时间（4小时后，批次中0.04 mmol底物的完全转化，而在流动反应器中，相同量的底物可以完全转化）在40分钟内转化为产品）。该反应的机理研究表明，THF不仅起溶剂的作用，而且还是至关重要的氢和电子给体。
• Cerium (IV) ammonium nitrate promoted oxidative cyclization of dimethyl 4-pentenylmalonate
  作者：Enrico Baciocchi、Anna Belli Paolobelli、Renzo Ruzziconi

  DOI：10.1016/s0040-4020(01)81235-7

  日期：1992.1

  CAN promoted oxidative cyclization of dimethyl 4-pentenylmalonate has been investigated in MeOH and in AcOH. The product distribution and the regioselectivity of the reaction (5-exo/6-endo ratio) appear to be very sensitive to the reaction conditions as well as the presence and the nature of copper salts, which can also be exploited from the synthetic point of view.

  已经在MeOH和AcOH中研究了CAN促进4-戊烯基丙二酸二甲酯的氧化环化作用。反应的产物分布和区域选择性（5-exo / 6-endo比率）似乎对反应条件以及铜盐的存在和性质非常敏感，这也可以从合成的角度加以利用。看法。