tert-butyl 2-(4-bromobenzyl)-3-oxobutanoate | 1432602-36-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: tert-butyl 2-(4-bromobenzyl)-3-oxobutanoate
• CAS: 1432602-36-2
• 化学式: C₁₅H₁₉BrO₃
• 分子量: 327.218
• InChiKey: ISEXWNRYUQOTAN-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.54
• 重原子数：
  19.0
• 可旋转键数：
  4.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  43.37
• 氢给体数：
  0.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  tert-butyl 2-(4-bromobenzyl)-3-oxobutanoate 在 (3aS)-3,3-bis(3,5-dimethylphenyl)-1-naphthalen-1-yl-3a,4,5,6-tetrahydropyrrolo[1,2-c][1,3,2]oxazaborole 、 4-乙酰氨基苯磺酰叠氮 、 双三氟甲烷磺酰亚胺 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 25.17h， 生成 (R)-tert-butyl 3-(4-bromophenyl)-2-(3-oxocyclohex-1-enyl)propanoate
  参考文献：
  名称：

  Catalytic Enantioselective Carbon Insertion into the β-Vinyl C–H Bond of Cyclic Enones

  摘要：

  Chiral oxazaborolidinium ion-catalyzed C-sp(2)-H functionalization of enones using diazoacetate has been developed. Various beta-substituted cyclic enones were synthesized in high yield (up to 99%) with high to excellent enantioselectivity (up to 99% ee). The synthetic utility of this reaction was demonstrated by the formal synthesis of (+)-epijuvabione.

  DOI：

  10.1021/ja402873b
• 作为产物：
  描述：

  乙酰乙酸叔丁酯 在 sodium hydride 作用下， 以 四氢呋喃 、 mineral oil 为溶剂， 反应 0.17h， 生成 tert-butyl 2-(4-bromobenzyl)-3-oxobutanoate
  参考文献：
  名称：

  Catalytic Enantioselective Carbon Insertion into the β-Vinyl C–H Bond of Cyclic Enones

  摘要：

  Chiral oxazaborolidinium ion-catalyzed C-sp(2)-H functionalization of enones using diazoacetate has been developed. Various beta-substituted cyclic enones were synthesized in high yield (up to 99%) with high to excellent enantioselectivity (up to 99% ee). The synthetic utility of this reaction was demonstrated by the formal synthesis of (+)-epijuvabione.

  DOI：

  10.1021/ja402873b

文献信息

• Five Roads That Converge at the Cyclic Peroxy-Criegee Intermediates: BF₃-Catalyzed Synthesis of β-Hydroperoxy-β-peroxylactones
  作者：Vera A. Vil’、Gabriel dos Passos Gomes、Maria V. Ekimova、Konstantin A. Lyssenko、Mikhail A. Syroeshkin、Gennady I. Nikishin、Igor V. Alabugin、Alexander O. Terent’ev

  DOI：10.1021/acs.joc.8b02218

  日期：2018.11.2

  actones from silyl enol ethers, enol acetates, and cyclic acetals confirm that the β-peroxylactones indeed correspond to a deep energy minimum that connects a variety of the interconverting oxygen-rich species at this combined potential energy surface. The target β-hydroperoxy-β-peroxylactones were synthesized from β-ketoesters, and their silyl enol ethers, alkyl enol ethers, enol acetates, and cyclic

  我们发现通过BF 3催化的各种无环前体，β-酮酸酯及其甲硅烷基烯醇醚，烷基烯醇醚，烯醇乙酸酯和环状缩醛与H 2 O的BF 3催化环化反应，可合成获得β-氢过氧-β-过氧内酯。2个。引人注目的是，与起始原料的选择无关，这些反应收敛于相同的β-氢过氧-β-过氧内酯产物，即先前难以捉摸的Baeyer-Villiger反应的环状Criegee中间体的过氧类似物。由甲硅烷基烯醇醚，烯醇乙酸酯和环状缩醛形成β-氢过氧-β-过氧内酯的计算热力学参数证实，β-过氧内酯确实对应于连接各种相互转化的富氧物种的最低能量最小值。在这个组合的势能面。由β-酮酸酯合成了目标β-氢过氧-β-过氧内酯，并以30-96％的收率获得了它们的甲硅烷基烯醇醚，烷基烯醇醚，烯醇乙酸酯和环状缩醛。这些反应在温和的条件下进行，即使在可以预期替代氧化途径的情况下，也可以选择性地形成多种选择性选择性形成的β-氢过氧-β-过氧内酯。这些β-
• Stereoelectronic Control in the Ozone‐Free Synthesis of Ozonides
  作者：Gabriel dos Passos Gomes、Ivan A. Yaremenko、Peter S. Radulov、Roman A. Novikov、Vladimir V. Chernyshev、Alexander A. Korlyukov、Gennady I. Nikishin、Igor V. Alabugin、Alexander O. Terent'ev

  DOI：10.1002/anie.201610699

  日期：2017.4.24

  The value of stereoelectronic guidelines is illustrated by the discovery of a convenient, ozone‐free synthesis of bridged secondary ozonides from 1,5‐dicarbonyl compounds and H2O2. The tetraoxane products generally formed in reactions of carbonyl and dicarbonyl compounds with H2O2 were not detected because the structural distortions imposed on the tetraoxacyclohexane subunit in [3.2.2]tetraoxanonanes

  立体电子指导原则的价值通过发现一种由1,5-二羰基化合物和H 2 O 2方便，无臭氧合成桥连的次级恶臭化合物的方法来说明。未检测到通常在羰基和二羰基化合物与H 2 O 2反应中形成的四恶烷产物，因为通过三碳桥作用在[3.2.2]四恶烷中的四氧杂环己烷亚基上的结构变形会导致端基异构化作用的部分失活。新程序易于扩展以生产克量的臭氧化物。该反应使得可以在不使用臭氧的情况下选择性制备臭氧化物。
• Highly enantioselective catalytic 1,3-dipolar cycloadditions of α-alkyl diazoacetates: efficient synthesis of functionalized 2-pyrazolines
  作者：Sung Il Lee、Ka Eun Kim、Geum-Sook Hwang、Do Hyun Ryu

  DOI：10.1039/c4ob02372b

  日期：——

  Highly enantioselective 1,3-dipolar cycloaddition reactions of α-substituted diazoacetates are accomplished by catalysis of the chiral oxazaborolidinium ion. Functionalized 2-pyrazolines are synthesized in high to excellent enantiomeric ratios (up to >99 : 1). The synthetic utility of 2-pyrazoline was expanded via preparation of 2,4-diamino ester compounds bearing a chiral quaternary carbon center.

  α-取代的重氮乙酸酯的高度对映选择性的1，3-偶极环加成反应通过手性恶唑硼烷鎓离子的催化来完成。功能化的2-吡唑啉以高至极好的对映体比例（高达> 99：1）合成。通过制备带有手性季碳中心的2，4-二氨基酯化合物，扩大了2-吡唑啉的合成用途。
• Enantioselective Cyclopropanation/[1,5]-Hydrogen Shift to Access Rauhut–Currier Product
  作者：Seung Tae Kim、Rameshwar Prasad Pandit、Jaesook Yun、Do Hyun Ryu

  DOI：10.1021/acs.orglett.0c03937

  日期：2021.1.1

  A Michael addition initiated cyclopropanation/[1,5]-hydrogen shift has been developed for the enantioselective synthesis of Rauhut–Currier products. The reaction of α-alkyl diazoesters and in situ generated o-quinone methides proceeds in the presence of chiral oxazaborolidinium ion, providing Z-stereocontrolled Rauhut–Currier products in high yields (up to 96%) with excellent Z/E selectivities (>20:1)

  已经开发了迈克尔加成引发的环丙烷化/ [1,5]-氢转移，用于Rauhut-Currier产品的对映选择性合成。α-烷基重氮酸酯与原位生成的邻醌甲基化物的反应在手性恶唑硼烷二鎓离子的存在下进行，可提供高收率（高达96％）的Z-立体控制Rauhut-Currier产品，并具有出色的Z / E选择性（> 20） ：1）和对映选择性（最高> 99％ee）。通过将产物转化为具有两个相邻的手性立体中心的3，4-二氢香豆素来说明合成用途。
• Catalytic Carbon Insertion into the β-Vinyl C–H Bond of Cyclic Enones with Alkyl Diazoacetates
  作者：Sung Il Lee、Byung Chul Kang、Geum-Sook Hwang、Do Hyun Ryu

  DOI：10.1021/ol4000026

  日期：2013.4.5

  The first example of the boron Lewis acid catalyzed C-SP2-H functionalization of cyclic enones was achieved using diazoacetates. The insertion of the carbon atom of diazoacetates utilizes BF3 center dot Et2O or a newly designed oxazaborolidinium ion as a catalyst to afford beta-functionalized cyclic enones from simple cyclic enones In a single step and high yields. The reaction mechanism was investigated with deuterium labeled 2-cyclohexen-1-one.