3,8-dimethyl-2,7-dioxaspiro[4.4]nonane | 1204190-83-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氧唑烯
• 英文名称: 3,8-dimethyl-2,7-dioxaspiro[4.4]nonane
• 英文别名: 3,8-Dimethyl-2,7-dioxaspiro[4.4]nonane
• CAS: 1204190-83-9
• 化学式: C₉H₁₆O₂
• 分子量: 156.225
• InChiKey: IQNUFCJYENSPNI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  二烯丙基丙二酸二乙酯 在 碘 、 三苯基硅烷 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 生成 3,8-dimethyl-2,7-dioxaspiro[4.4]nonane
  参考文献：
  名称：

  Intramolecular Hydroalkoxylation of Unactivated Alkenes Using Silane–Iodine Catalytic System

  摘要：

  A novel catalytic system using I-2 and PhSiH3 for the intramolecular hydroalkoxylation of unactivated alkenes is described. NMR study indicated that in situ generated PhSiH2I is a possible active catalytic species. This catalytic system allows an efficient intramolecular hydroalkoxylation of phenyl-, trialkyl-, and 1,1-dialkyl-substituted alkenes as well as a variety of unactivated monoalkyl- and 1,2-dialkyl-substituted alkenes at room temperature. Mechanistic consideration based on significant experimental observations is also discussed.

  DOI：

  10.1021/acs.orglett.5b01797

文献信息

• Efficient Intramolecular Hydroalkoxylation of Unactivated Alkenols Mediated by Recyclable Lanthanide Triflate Ionic Liquids: Scope and Mechanism
  作者：Alma Dzudza、Tobin J. Marks

  DOI：10.1002/chem.200902269

  日期：2010.3.15

  catalytic pathway that involves kinetically significant intramolecular proton transfer. The present activation parameters—enthalpy (ΔH≠)=18.2 (9) kcal mol−1, entropy (ΔS≠)=−17.0 (1.4) eu, and energy (Ea)=18.2 (8) kcal mol−1—suggest a highly organized transition state. Proton scavenging and coordinative probing results suggest that the lanthanide triflates are not simply precursors of free triflic acid. Based

  [Ln（OTf）3 ]类型的镧系三氟甲磺酸盐配合物（Ln = La，Sm，Nd，Yb，Lu）可作为有效的可循环催化剂，用于伯/仲和脂族/芳族化合物的快速分子内加氢烷氧基化（HO）/环化咪唑基室温离子液体（RTIL）中的羟基烯烃，生成相应的呋喃，吡喃，螺双环呋喃，螺双环呋喃/吡喃，苯并呋喃和异色满衍生物。产物直接从催化溶液中分离出来，转化表现出马尔可夫尼科夫区域选择性，周转频率高达47 h -1在120°C下。初级烯醇环化的环大小速率依赖性为5> 6，与空间控制的过渡态一致。末端烯醇的加氢烷氧基化/环化速率比内部烯醇的加氢烷氧基化/环化速率稍快，这表明在环状过渡态中适度的空间需求。芳基官能化羟基烯烃的环化速率比线性烯醇的环化速率更快，而五元和五元/六元螺双环骨架也被区域选择性封闭。在主要的空间受限的烯醇的环化过程中，从La 3+（1.160Å）到Lu 3+，对金属离子半径的周转频率依赖性降低了约80倍（0
• Copper-catalysed intramolecular O–H addition to unactivated alkenes
  作者：Luis A. Adrio、Louisa Shuyi Quek、Jason G. Taylor、King Kuok (Mimi) Hii

  DOI：10.1016/j.tet.2009.10.055

  日期：2009.12

  Intramolecular cyclisation of omega-alkenoic acids and alkenols can be achieved using a catalytic amount of Cu(OTf)(2) to afford lactones and cyclic ethers, offering a practical alternative to existing catalysts. (C) 2009 Elsevier Ltd. All rights reserved.
• Intramolecular Hydroalkoxylation of Unactivated Alkenes Using Silane–Iodine Catalytic System
  作者：Shoji Fujita、Masanori Abe、Masatoshi Shibuya、Yoshihiko Yamamoto

  DOI：10.1021/acs.orglett.5b01797

  日期：2015.8.7

  A novel catalytic system using I-2 and PhSiH3 for the intramolecular hydroalkoxylation of unactivated alkenes is described. NMR study indicated that in situ generated PhSiH2I is a possible active catalytic species. This catalytic system allows an efficient intramolecular hydroalkoxylation of phenyl-, trialkyl-, and 1,1-dialkyl-substituted alkenes as well as a variety of unactivated monoalkyl- and 1,2-dialkyl-substituted alkenes at room temperature. Mechanistic consideration based on significant experimental observations is also discussed.