(Z)-diethyl 2-benzyl-2-(but-2-en-1-yl)malonate | 1447797-40-1

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (Z)-diethyl 2-benzyl-2-(but-2-en-1-yl)malonate
• 英文别名: (Z)-diethyl 2-butenyl-2-benzylmalonate；diethyl 2-benzyl-2-[(Z)-but-2-enyl]propanedioate
• CAS: 1447797-40-1
• 化学式: C₁₈H₂₄O₄
• 分子量: 304.386
• InChiKey: PUXMUCDCXTWWPM-DAXSKMNVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  22
• 可旋转键数：
  10
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (Z)-diethyl 2-benzyl-2-(but-2-en-1-yl)malonate 在 N,N,N',N'-tetramethyl-7,8-dihydro-6H-dipyrido[1,2-a;2',1'-c][1,4]diazepine-2,12-diamine 、 盐酸 作用下， 以 N,N-二甲基甲酰胺 、 水 为溶剂， 反应 72.0h， 以64%的产率得到(Z)-2-(ethoxycarbonyl)hex-4-enoic acid
  参考文献：
  名称：

  Overturning Established Chemoselectivities: Selective Reduction of Arenes over Malonates and Cyanoacetates by Photoactivated Organic Electron Donors

  摘要：

  The prevalence of metal-based reducing reagents, including metals, metal complexes, and metal salts, has produced an empirical order of reactivity that governs our approach to chemical synthesis. However, this reactivity may be influenced by stabilization of transition states, intermediates, and products through substrate metal bonding. This article reports that in the absence of such stabilizing interactions, established chemoselectivities can be overthrown. Thus, photoactivation of the recently developed neutral organic superelectron donor 5 selectively reduces alkyl-substituted benzene rings in the presence of activated esters and nitriles, in direct contrast to metal-based reductions, opening a new perspective on reactivity. The altered outcomes arising from the organic electron donors are attributed to selective interactions between the neutral organic donors and the arene rings of the substrates.

  DOI：

  10.1021/ja4050168
• 作为产物：
  描述：

  苄基丙二酸二乙酯 在 sodium hydride 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 16.84h， 生成 (Z)-diethyl 2-benzyl-2-(but-2-en-1-yl)malonate
  参考文献：
  名称：

  Overturning Established Chemoselectivities: Selective Reduction of Arenes over Malonates and Cyanoacetates by Photoactivated Organic Electron Donors

  摘要：

  The prevalence of metal-based reducing reagents, including metals, metal complexes, and metal salts, has produced an empirical order of reactivity that governs our approach to chemical synthesis. However, this reactivity may be influenced by stabilization of transition states, intermediates, and products through substrate metal bonding. This article reports that in the absence of such stabilizing interactions, established chemoselectivities can be overthrown. Thus, photoactivation of the recently developed neutral organic superelectron donor 5 selectively reduces alkyl-substituted benzene rings in the presence of activated esters and nitriles, in direct contrast to metal-based reductions, opening a new perspective on reactivity. The altered outcomes arising from the organic electron donors are attributed to selective interactions between the neutral organic donors and the arene rings of the substrates.

  DOI：

  10.1021/ja4050168

文献信息

• Direct Allylation of Active Methylene Compounds with Allylic Alcohols by Use of Palladium/Phosphine-Borane Catalyst System
  作者：Aika Shimizu、Goki Hirata、Gen Onodera、Masanari Kimura

  DOI：10.1002/adsc.201800187

  日期：2018.5.16

  The C−C bond formation between active methylene compounds and allylic alcohols has been newly developed by using a palladium complex as a catalyst together with a phosphine‐borane ligand. The best phosphine‐borane ligand for this direct allylation has been revealed to be Ph2P(CH2)4(9‐BBN) to produce a variety of desirable allylated products in high yields.

  通过使用钯配合物与膦-硼烷配体作为催化剂，新开发了活性亚甲基化合物与烯丙基醇之间的C-C键形成。已经证明，用于这种直接烯丙基化的最佳膦硼烷配体是Ph 2 P（CH 2）4（9-BBN），可以高产率生产出各种理想的烯丙基化产物。
• Overturning Established Chemoselectivities: Selective Reduction of Arenes over Malonates and Cyanoacetates by Photoactivated Organic Electron Donors
  作者：Eswararao Doni、Bhaskar Mondal、Steven O’Sullivan、Tell Tuttle、John A. Murphy

  DOI：10.1021/ja4050168

  日期：2013.7.31

  The prevalence of metal-based reducing reagents, including metals, metal complexes, and metal salts, has produced an empirical order of reactivity that governs our approach to chemical synthesis. However, this reactivity may be influenced by stabilization of transition states, intermediates, and products through substrate metal bonding. This article reports that in the absence of such stabilizing interactions, established chemoselectivities can be overthrown. Thus, photoactivation of the recently developed neutral organic superelectron donor 5 selectively reduces alkyl-substituted benzene rings in the presence of activated esters and nitriles, in direct contrast to metal-based reductions, opening a new perspective on reactivity. The altered outcomes arising from the organic electron donors are attributed to selective interactions between the neutral organic donors and the arene rings of the substrates.