ethyl 2-acetyl-5-((tert-butyldimethylsilyl)oxy)pentanoate | 247216-34-8

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 酮酸及其衍生物
• 英文名称: ethyl 2-acetyl-5-((tert-butyldimethylsilyl)oxy)pentanoate
• 英文别名: Ethyl 2-acetyl-5-[tert-butyl(dimethyl)silyl]oxypentanoate
• CAS: 247216-34-8
• 化学式: C₁₅H₃₀O₄Si
• 分子量: 302.486
• InChiKey: MHVVFGUXQZUBKT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.56
• 重原子数：
  20
• 可旋转键数：
  10
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.87
• 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：

  ethyl 2-acetyl-5-((tert-butyldimethylsilyl)oxy)pentanoate 在 氢氧化钾 、 sodium tetrahydroborate 、 苯磺酰氯 作用下， 以 吡啶 、 甲醇 、 乙醇 、 水 、 甲苯 为溶剂， 生成 tert-butyl-dimethyl-[3-[(2S,3S)-2-methyl-4-methylideneoxetan-3-yl]propoxy]silane
  参考文献：
  名称：

  Preparation and Properties of 2-Methyleneoxetanes

  摘要：

  The methylenation of beta-lactones 5 with dimethyltitanocene provides a versatile, reliable, and highly chemoselective entry to 2-methyleneoxetanes 7. The conversion proceeds selectively in the presence of alkenes, unprotected alcohols, and a variety of other carbonyl moieties, A study of conditions for the optimization of this reaction is delineated. In addition, the first X-ray structure of a 2-methyleneoxetane, which shows its similarity to related p-lactones, is reported. Reactivity studies of 2-methyleneoxetanes are presented in which it is demonstrated that these compounds are attacked at C-4 with a nucleophile; then, subsequently, the resultant enolate reacted with an electrophile. An interesting dichotomy of reactivity was observed when methyleneoxetane 7c was treated with electrophiles. Reaction of 7c with acetic acid gave acetoxyoxetane 19. When 7c was exposed to bromine, dibromoketone 20 resulted.

  DOI：

  10.1021/jo9906072
• 作为产物：
  描述：

  (3-溴丙氧基)叔丁基二甲基硅烷 、 乙酰乙酸乙酯 在 potassium tert-butylate 作用下， 以 四氢呋喃 、 叔丁醇 为溶剂， 反应 36.5h， 生成 ethyl 2-acetyl-5-((tert-butyldimethylsilyl)oxy)pentanoate
  参考文献：
  名称：

  Rh(I)–双膦催化 α-取代丙烯酸酯衍生物的不对称分子间氢杂芳基化

  摘要：

  烯烃的不对称氢杂芳基化代表了复杂杂环基序的便捷进入。虽然已知手性酸可以介导富电子杂芳烃向 Michael 受体的不对称加成，但很少有方法利用过渡金属通过 C-H 活化、迁移插入序列催化杂环与烯烃的烷基化。在此，我们描述了α-取代丙烯酸酯与苯并恶唑的不对称分子间氢杂芳基化反应的发展。该反应以中等至优异的产率和良好至优异的对映选择性提供2-取代的苯并恶唑。值得注意的是，一系列机制研究似乎与涉及 Rh(I)-烯醇化物对映选择性质子化的途径相矛盾，尽管事实上在芳基硼酸与甲基丙烯酸酯衍生物的相关加成中几乎一致地调用了这种机制。相反，有证据表明，迁移插入或β-氢化物消除具有对映决定性，Rh(I)-烯醇化物异构化为Rh(I)-杂苄基物质可将所得的α-立构中心与差向异构化隔离开来。庞大的配体 CTH-(R)-Xylyl-P-Phos 对于反应性和对映选择性至关重要，因为它可能会阻止苯并恶唑底物或中间体与循

  DOI：

  10.1021/ja511445x

文献信息

• Brønsted Acid Catalyzed Cyclization of Aminodiazoesters with Aldehydes to 3-Carboxylate-<i>N</i>-Heterocycles
  作者：Yang Jiao、Anrong Chen、Bangkui Yu、Hanmin Huang

  DOI：10.1021/acs.orglett.0c02125

  日期：2020.8.7

  A Brønsted acid catalyzed cyclization of aminodiazoesters with aldehydes is described. This reaction features broad substrate generality and functional group compatibility, affording a wide range of 5–7-membered 3-carboxylate-N-heterocycles containing different functional groups. The title products are able to be further elaborated through simple functional group transformations to produce synthetically

  描述了布朗斯台德酸与醛对氨基重氮酯的环化。该反应具有广泛的底物通用性和官能团相容性，可提供范围广泛的含有不同官能团的5-7元3-羧酸盐-N-杂环。标题产物能够通过简单的官能团转化来进一步详述，以产生合成上有用的N-杂环。
• Rh-Catalyzed Asymmetric Hydroformylation of Functionalized 1,1-Disubstituted Olefins
  作者：Xiao Wang、Stephen L. Buchwald

  DOI：10.1021/ja2092689

  日期：2011.11.30

  The first method for the highly enantioselective rhodium-catalyzed hydroformylation of 1,1-disubstituted olefins has been developed. By employing either of the P-chirogenic phosphine ligands BenzP* and QuinoxP*, linear aldehydes with β-chirality can be prepared in a highly enantioselective fashion with good chemo- and regioselectivities.

  已开发出第一种对 1,1-二取代烯烃进行高度对映选择性的铑催化加氢甲酰化的方法。通过使用 P-手性膦配体 BenzP* 和 QuinoxP* 中的任一个，可以以高度对映选择性的方式制备具有 β-手性的线性醛，并具有良好的化学和区域选择性。
• Iron‐Catalyzed Aminomethyloxygenative Cyclization of Hydroxy‐α‐diazoesters with <i>N,O</i> ‐Aminals
  作者：Suchen Zou、Tianze Zhang、Siyuan Wang、Hanmin Huang

  DOI：10.1002/cjoc.201900492

  日期：2020.4

  A new and efficient cyclization reaction has been developed to synthesize cyclic α,α‐disubstituted β‐amino esters via iron‐catalyzed intramolecular aminomethyloxygenative cyclization of diazo compounds with N,O‐aminal under mild reaction conditions. A broad range of hydroxy‐α‐diazoesters with different substituents and various N,O‐aminals were compatible with this protocol, affording the corresponding

  已开发出一种新的高效环化反应，通过在温和的反应条件下，通过铁催化的重氮化合物与N，O-氨基的重氮化合物的分子内氨基甲氧基加氧环化反应，合成环状α，α-二取代的β-氨基酯。各种具有不同取代基的羟基α-重氮酸酯和各种N，O-氨基缩醛与该方案兼容，从而以高收率提供了带有五至八元氧杂环的相应α，α-二取代的β-氨基酯。
• Rh(I)–Bisphosphine-Catalyzed Asymmetric, Intermolecular Hydroheteroarylation of α-Substituted Acrylate Derivatives
  作者：Claire M. Filloux、Tomislav Rovis

  DOI：10.1021/ja511445x

  日期：2015.1.14

  Asymmetric hydroheteroarylation of alkenes represents a convenient entry to elaborated heterocyclic motifs. While chiral acids are known to mediate asymmetric addition of electron-rich heteroarenes to Michael acceptors, very few methods exploit transition metals to catalyze alkylation of heterocycles with olefins via a C–H activation, migratory insertion sequence. Herein, we describe the development

  烯烃的不对称氢杂芳基化代表了复杂杂环基序的便捷进入。虽然已知手性酸可以介导富电子杂芳烃向 Michael 受体的不对称加成，但很少有方法利用过渡金属通过 C-H 活化、迁移插入序列催化杂环与烯烃的烷基化。在此，我们描述了α-取代丙烯酸酯与苯并恶唑的不对称分子间氢杂芳基化反应的发展。该反应以中等至优异的产率和良好至优异的对映选择性提供2-取代的苯并恶唑。值得注意的是，一系列机制研究似乎与涉及 Rh(I)-烯醇化物对映选择性质子化的途径相矛盾，尽管事实上在芳基硼酸与甲基丙烯酸酯衍生物的相关加成中几乎一致地调用了这种机制。相反，有证据表明，迁移插入或β-氢化物消除具有对映决定性，Rh(I)-烯醇化物异构化为Rh(I)-杂苄基物质可将所得的α-立构中心与差向异构化隔离开来。庞大的配体 CTH-(R)-Xylyl-P-Phos 对于反应性和对映选择性至关重要，因为它可能会阻止苯并恶唑底物或中间体与循
• Preparation and Properties of 2-Methyleneoxetanes
  作者：Lisa M. Dollinger、Albert J. Ndakala、Mehrnoosh Hashemzadeh、Gan Wang、Ying Wang、Isamir Martinez、Joel T. Arcari、David J. Galluzzo、Amy R. Howell、Arnold L. Rheingold、Joshua S. Figuero

  DOI：10.1021/jo9906072

  日期：1999.9.1

  The methylenation of beta-lactones 5 with dimethyltitanocene provides a versatile, reliable, and highly chemoselective entry to 2-methyleneoxetanes 7. The conversion proceeds selectively in the presence of alkenes, unprotected alcohols, and a variety of other carbonyl moieties, A study of conditions for the optimization of this reaction is delineated. In addition, the first X-ray structure of a 2-methyleneoxetane, which shows its similarity to related p-lactones, is reported. Reactivity studies of 2-methyleneoxetanes are presented in which it is demonstrated that these compounds are attacked at C-4 with a nucleophile; then, subsequently, the resultant enolate reacted with an electrophile. An interesting dichotomy of reactivity was observed when methyleneoxetane 7c was treated with electrophiles. Reaction of 7c with acetic acid gave acetoxyoxetane 19. When 7c was exposed to bromine, dibromoketone 20 resulted.