1,1-Dimethylcarboxy-3,4-dimethylcyclopent-3-ene | 126571-17-3

• 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: 1,1-Dimethylcarboxy-3,4-dimethylcyclopent-3-ene
• 英文别名: 4,4-bis(carbomethoxy)-1,2-dimethylcyclopentene；4,4-dicarbomethoxy-1,2-dimethylcyclopent-1-ene；4,4-dicarbomethoxy-1,2-dimethylcyclopentene；3-Cyclopentene-1,1-dicarboxylic acid, 3,4-dimethyl-, dimethyl ester；dimethyl 3,4-dimethylcyclopent-3-ene-1,1-dicarboxylate
• CAS: 126571-17-3
• 化学式: C₁₁H₁₆O₄
• 分子量: 212.246
• InChiKey: GRAUQVMFYONZDV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  15
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.64
• 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：

  二烯丙基丙二酸二甲酯 在 三乙基硅烷 、 (η-C3H5)Pd(Cl)P(cyclopentyl)3 、 四(3,5-二(三氟甲基)苯基)硼酸钠 作用下， 以 二氯甲烷 为溶剂， 反应 0.17h， 以89%的产率得到1,1-Dimethylcarboxy-3,4-dimethylcyclopent-3-ene
  参考文献：
  名称：

  Development, Synthetic Scope, and Mechanistic Studies of the Palladium-Catalyzed Cycloisomerization of Functionalized 1,6-Dienes in the Presence of Silane

  摘要：

  A 1:1 mixture of the pi-allyl palladium complex (eta (3)-C3H5)Pd(CI)PCy3 Cia) and NaB[3,5-C6H3(CF3)(2)](4) in the presence of HSiEt3 catalyzed the cycloisomerization of diethyl diallylmalonate (2b) to form 4,4-dicarbomethoxy 1,2-dimethylcyclopentane (3b) in 98% yield with 98% isomeric purity. The procedure tolerated a range of functionality including esters, ketones, sulfones, protected alcohols, and substitution at the allylic and terminal olefinic carbon atoms. Cycloisomerization of 2b obeyed zero-order kinetics to >3 half-lives with initial formation of 1,1-dicarboethoxy-4-methyl-3-methylenecyclopentane (4b), followed by secondary isomerization to 3b. Deuterium labeling studies revealed that the conversion of 2b to 4b was accompanied by significant H/D exchange, consistent with an addition/elimination pathway coupled with facile H/D exchange of the Pd-H(D) intermediates with free silane.

  DOI：

  10.1021/ja001730+

文献信息

• Ruthenium-Catalyzed One-Pot Double Allylation/Cycloisomerization of 1,3-Dicarbonyl Compounds Leading toexo-Methylenecyclopentanes
  作者：Yoshihiko Yamamoto、Yu-ichiro Nakagai、Kenji Itoh

  DOI：10.1002/chem.200305340

  日期：2004.1.5

  tion of 1,3-diketones and methyl acetoacetate gave exo-methylenecyclopentanes in moderate to good yields with high isomer selectivity. The double allylation step effectively proceeded in the presence of a Ru(II) precatalyst, [Cp*RuCl(cod)], in 1,2-dichloroethane at 90 degrees C. The subsequent cycloisomerization was carried out upon addition of triethylsilane as a hydride source without purification

  钌催化的1，3-二酮和乙酰乙酸甲酯的一锅双烯丙基化/环异构化反应以中等到良好的收率得到了高亚甲基环戊烷的异构体选择性。双重烯丙基化步骤在Ru（II）预催化剂[Cp * RuCl（cod）]存在下于1,2-二氯乙烷中于90摄氏度下有效地进行。随后的环异构化反应是在加入三乙基硅烷作为氢化物后进行的。源，无需纯化1,6-二烯中间体。通过（1）NMR光谱对反应进行的详细检查显示，三乙基甲硅烷基甲基醚对于将在双烯丙基化步骤中形成的钌（IV）烯丙基络合物转化成环异构化所需的钌（II）物种起着重要作用。
• Triarylphosphine Ligands with Hemilabile Alkoxy Groups: Ligands for Nickel(II)-Catalyzed Olefin Dimerization Reactions. Hydrovinylation of Vinylarenes, 1,3-Dienes, and Cycloisomerization of 1,6-Dienes
  作者：Souvagya Biswas、Aibin Zhang、Balaram Raya、T. V. RajanBabu

  DOI：10.1002/adsc.201400237

  日期：2014.7.7

  practical synthesis of these compounds. In sharp contrast, hydrovinylation of a variety of 1,3‐dienes is best catalyzed by nickel(II) complexes of 2‐benzyloxyphenyldiphenylphosphine, L5. The other two ligands, 2‐benzyloxymethyl‐ (L6) and 2‐benzyloxyethyldiphenylphosphine (L7) are much less effective in the HV of 1,3‐dienes. Nickel(II)‐catalyzed cycloisomerization of 1,6‐dienes into methylenecyclopentanes

  用2-苄氧基，2-苄氧基甲基或2-苄氧基乙基-苯基部分取代三苯膦中的一个苯基会产生一组简单的配体，这些配体在各种镍（II）催化的烯烃二聚反应中表现出截然不同的行为反应。配体与2-苄氧基苯基和2-苄氧基甲基苯基二苯基膦的配合物（分别为L5和L6）对乙烯基芳烃的氢乙烯基化（HV）最具活性，前者导致伯3-芳基-1-丁烯广泛异构化为共轭物2-芳基-2-丁烯即使在-55°C下也可以。但是，2-苄氧基甲基取代的配体L6该化合物的活性略低，在环境温度下可提供定量的HV初级产品定量收率，而没有异构化的痕迹，因此为这些化合物的实际合成提供了最佳选择。与之形成鲜明对比的是，2-苄氧基苯基二苯基膦L5的镍（II）配合物最好地催化了各种1,3-二烯的氢乙烯基化。其他两个配体，2-苄氧基甲基-（L6）和2-苄氧基乙基二苯基膦（L7）在1,3-二烯的HV方面效力低得多。镍（II）催化的1,6-二烯环化异构化为亚甲基环
• Ruthenium(ii)-catalysed cycloisomerisation of 1,6-dienes by focused microwave dielectric heating: improved rates and selectivities leading to exo-methylenecyclopentanes
  作者：Ian J. S. Fairlamb、Gerard P. McGlacken、Felix Weissberger

  DOI：10.1039/b513798e

  日期：——

  We herein report the effect of microwave dielectric heating in the Ru-catalysed cycloisomerisation of 1,6-dienes. Substantially improved reaction rates are attained for a series of 1,6-diene substrates, with equivalent or higher isomeric purity than conventional thermal heating.

  我们在此报告了微波介电加热在钌催化的1,6-二烯环异构化中的影响。对于一系列1,6-二烯底物，反应速度显著提高，并且异构体纯度与传统热加热相当或更高。
• Ni(I)-Catalyzed Reductive Cyclization of 1,6-Dienes: Mechanism-Controlled trans Selectivity
  作者：Yulong Kuang、David Anthony、Joseph Katigbak、Flaminia Marrucci、Sunita Humagain、Tianning Diao

  DOI：10.1016/j.chempr.2017.07.010

  日期：2017.8

  cyclization of 1,6-dienes affords 3,4-disubstituted cyclopentane and pyrrolidine derivatives with high trans diastereoselectivity. This cyclization reaction enables the efficient synthesis of trans-3,4-dimethyl gababutin, a pharmaceutical lead for treating neuropathic pain, and trans-3,4-dimethylpyrrolidine, a precursor to drug candidates and pesticides. The trans selectivity distinguishes this reaction

  Ni催化的1，6-二烯的还原环化得到具有高反式非对映选择性的3，4-二取代的环戊烷和吡咯烷衍生物。该环化反应使得能够有效合成反式3,4-二甲基gababutin，用于治疗神经性疼痛的药物铅，和反式- 3,4-二甲基吡咯烷，前体药物候选和杀虫剂。的反式选择性区分从经由氢原子转移和铅进行相关先例该反应的顺式产物。机械研究，包括动力学，光谱学和激进时钟研究，将反式归因于Ni（I）和Ni（III）中间体介导的经典有机金属催化循环的非对映选择性。与以前的Ni（II）催化剂观察到的氧化还原-中性环异构化相反，通过具有氧化还原活性的α-二亚胺配体稳定的富电子Ni（I）中间体对还原环化具有化学选择性。
• Ruthenium carbene complexes with imidazolin-2-ylidene ligands allow the formation of tetrasubstituted cycloalkenes by RCM
  作者：Lutz Ackermann、Alois Fürstner、Thomas Weskamp、Florian J. Kohl、Wolfgang A. Herrmann

  DOI：10.1016/s0040-4039(99)00919-3

  日期：1999.6

  Chemically quite robust ruthenium carbene complexes 2–8 bearing one or two imidazolin-2-ylidene ligands are highly active catalysts for all types of ring closing metathesis reactions (RCM). Importantly, they even allow the formation of tetrasubstituted alkenes that were previously out of reach of ruthenium-based metathesis catalysts.

  化学上非常坚固的带有一个或两个咪唑啉-2-亚烷基配体的钌卡宾配合物2-8是用于所有类型的闭环复分解反应（RCM）的高活性催化剂。重要的是，它们甚至允许形成以前基于钌的复分解催化剂无法获得的四取代烯烃。