(E)-2-Ethylidentetrahydrofuran | 38614-13-0

• 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: (E)-2-Ethylidentetrahydrofuran
• 英文别名: (E)-2-ethylidene-tetrahydrofuran；exo-2-Ethylidenetetrahydrofuran；(2E)-2-ethylideneoxolane
• CAS: 38614-13-0
• 化学式: C₆H₁₀O
• 分子量: 98.1448
• InChiKey: FLLKLVUMIZLEGM-QHHAFSJGSA-N

物化性质

• 沸点：
  129.3±10.0 °C(Predicted)
• 密度：
  1.012±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  7
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

安全信息

• 海关编码：
  2932190090

反应信息

• 作为产物：
  描述：

  己-4-炔-1-醇 反应 168.0h， 生成 (E)-2-Ethylidentetrahydrofuran
  参考文献：
  名称：

  Alkaline Earth Catalysis of Alkynyl Alcohol Hydroalkoxylation/Cyclization

  摘要：

  Heavier alkaline earth bis(trimethylsilyl)amides [Ae{N(SiMe3)(2)}(2)](2) (Ae = Ca, Sr, Ba) are shown to act as effective precatalysts for the regioselective intramolecular hydroalkoxylation/cyclization of a wide range of alkynyl and allenyl alcohols. In the majority of cases, cyclization of alkynyl alcohols produces mixtures of the possible endo- and exocyclic enol ether products, rationalized as a consequence of alkynylalkoxide isomerization to the corresponding allene derivatives. Cyclization rates for terminal alkynyl alcohols were found to be significantly higher than for substrates bearing internal alkynyl substituents, while the efficacy of cyclization was in general found to be determined by a combination of stereoelectronic influences and the thermochemical viability of the specific alkaline earth metal catalysis, which we suggest is determined by the individual M-O bond strengths. Kinetic studies have provided a rate law pertaining to a pronounced catalyst inhibition with increasing [substrate], indicating that turnover-limiting insertion of C-C unsaturation into the M-O bond requires the dissociation of substrate molecules away from the Lewis acidic alkaline earth center.

  DOI：

  10.1021/om3008663

文献信息

• Seo, SungYong; Yu, Xianghua; Marks, Tobin J., Journal of the American Chemical Society, 2009, vol. 131, p. 263 - 276
  作者：Seo, SungYong、Yu, Xianghua、Marks, Tobin J.

  DOI：——

  日期：——
• Alkaline Earth Catalysis of Alkynyl Alcohol Hydroalkoxylation/Cyclization
  作者：Christine Brinkmann、Anthony G. M. Barrett、Michael S. Hill、Panayiotis A. Procopiou、Stephanie Reid

  DOI：10.1021/om3008663

  日期：2012.10.22

  Heavier alkaline earth bis(trimethylsilyl)amides [AeN(SiMe3)(2)}(2)](2) (Ae = Ca, Sr, Ba) are shown to act as effective precatalysts for the regioselective intramolecular hydroalkoxylation/cyclization of a wide range of alkynyl and allenyl alcohols. In the majority of cases, cyclization of alkynyl alcohols produces mixtures of the possible endo- and exocyclic enol ether products, rationalized as a consequence of alkynylalkoxide isomerization to the corresponding allene derivatives. Cyclization rates for terminal alkynyl alcohols were found to be significantly higher than for substrates bearing internal alkynyl substituents, while the efficacy of cyclization was in general found to be determined by a combination of stereoelectronic influences and the thermochemical viability of the specific alkaline earth metal catalysis, which we suggest is determined by the individual M-O bond strengths. Kinetic studies have provided a rate law pertaining to a pronounced catalyst inhibition with increasing [substrate], indicating that turnover-limiting insertion of C-C unsaturation into the M-O bond requires the dissociation of substrate molecules away from the Lewis acidic alkaline earth center.