2-Ethyl-1,3-dioxepan | 57626-93-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧环庚烷
• 英文名称: 2-Ethyl-1,3-dioxepan
• 英文别名: 2-ethyl-[1,3]dioxepane；1,3-Dioxepane, 2-ethyl-；2-ethyl-1,3-dioxepane
• CAS: 57626-93-4
• 化学式: C₇H₁₄O₂
• 分子量: 130.187
• InChiKey: NMDKWXKURHHQBW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  9
• 可旋转键数：
  1
• 环数：
  1.0
• 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

• 作为反应物：
  描述：

  2-Ethyl-1,3-dioxepan 在 1,4-Dioxane Dibromide 作用下， 以 四氯化碳 为溶剂， 生成 2-α-Bromaethyl-1,3-dioxacycloheptan
  参考文献：
  名称：

  1,4-二恶烷二溴化物溴化缩醛的动力学及机理

  摘要：

  DOI：

  10.1007/bf00507239
• 作为产物：
  描述：

  丙醛 以61%的产率得到
  参考文献：
  名称：

  KANTLEHNER W.; GUTBROD H.-D., SYNTHESIS, 1979, NO 12, 975-976

  摘要：

  DOI：

文献信息

• Self-assembly synthesis of a high-content sulfonic acid group functionalized ordered mesoporous polymer-based solid as a stable and highly active acid catalyst
  作者：Wei Wang、Xin Zhuang、Qingfei Zhao、Ying Wan

  DOI：10.1039/c2jm32894a

  日期：——

  A stable and highly active ordered mesoporous polymer-based acid catalyst has been prepared via a simple surfactant templating approach and oxidation treatment. The composition and nanostructure are characterized by XRD, NMR, XPS, TEM, nitrogen sorption, elemental and chemical analysis. The sulfonic acid groups have been anchored within the well-arranged channels of the polymer-based matrix. Even with a high –SO3H group loading (up to about 27.4 wt%) on the mesoporous polymer-based material, the ordered mesostructure and high surface area (∼400 m2 g−1) can be retained and the functional moieties are highly chemically accessible. With the large number of acid sites (0.93–2.38 H+ mmol g−1 determined by acid–base titration) and the hydrophobic character, the mesoporous polymer-based solid exhibits unique catalytic performance in acid-catalyzed reactions such as condensation and acetalization, not only high activity (per site yield of bisphenol-A is over 45 in the condensation of phenol and acetone) but also excellent stability. Loss in acidic loading and activity is negligible even after the catalyst is reused 20 times in the acetalization of butanediol and aldehyde. The stability is most likely attributed to the hydrophobic nature of the mesoporous polymer-based solids, which favors the diffusion of water and thereby inhibits the poisoning of acidic sites caused by water generating in the reaction. Moreover, with large mesopores, the diffusion of reactants and products can be promoted and hence the catalytic activity can be further increased.

  一种稳定且高活性的有序介孔聚合物基酸催化剂通过简单的表面活性剂模板法和氧化处理制备而成。通过XRD、NMR、XPS、TEM、氮气吸附、元素和化学分析对其成分和纳米结构进行了表征。磺酸基团已被锚定在聚合物基基体的井然有序的通道内。即使在介孔聚合物基材料上具有高达约27.4 wt%的–SO3H基团负载，有序的介观结构和高比表面积（约400 m²/g）依然能够保持，功能性基团具有较高的化学可接近性。由于大量的酸位（通过酸碱滴定测定为0.93–2.38 H+/mmol g−1）以及疏水性，这种介孔聚合物基固体在酸催化反应中表现出独特的催化性能，如缩合反应和缩醛化反应，不仅活性高（在苯酚与丙酮的缩合反应中，每个活性位点产生的双酚A的产率超过45），而且稳定性也极佳。即使催化剂在丁二醇和醛的缩醛化反应中重复使用20次，酸负载和活性的损失也是微不足道的。这种稳定性很可能归因于介孔聚合物基固体的疏水特性，有助于水的扩散，从而抑制了反应中生成的水对酸位点造成的中毒。此外，由于具有较大的介孔，反应物和产物的扩散得以促进，因此催化活性进一步提高。
• PRODUCTION OF CYCLIC ACETALS BY REACTIVE DISTILLATION
  申请人：Billodeaux Damon Ray

  公开号：US20120330034A1

  公开（公告）日：2012-12-27

  Cyclic acetals can be produced in a reactive distillation apparatus by combining a polyhydroxyl compound and an aldehyde. High concentrations of cyclic acetals are removed as liquid products from the column while water is removed as an overhead vapor stream.

  环状缩醛可以通过在反应蒸馏设备中将多羟基化合物和醛类化合物结合而制备。高浓度的环状缩醛作为液体产品从塔柱中移除，而水则作为顶部蒸汽流从中移除。
• PRODUCTION OF CYCLIC ACETALS OR KETALS USING SOLID ACID CATALYSTS
  申请人：Terrill Daniel Latham

  公开号：US20120330032A1

  公开（公告）日：2012-12-27

  A process for making a cyclic compounds such as cyclic acetal or cyclic ketones by feeding aldehyde or ketone compounds and polyhydroxyl compounds to a reaction zone at a molar ratio of polyhydroxyl compounds to aldehyde or ketone compounds of at least 3:1, reacting these compounds in the presence of a solid acid such as an acidic ion exchange resin, to generate a liquid reaction mixture without separating water from the reaction mixture as it is being formed in the reaction mixture, withdrawing the liquid reaction mixture from the reaction zone as a liquid product stream, and feeding the liquid reaction product stream to a distillation column to separate cyclic acetal compounds from unreacted polyhydroxyl compounds, and optionally recycling back the unreacted polyhydroxyl compounds to the reaction zone. The process produces cyclic acetal compounds in yields of at least 90% with long catalyst life. The process is also suitable to make cyclic ketals from ketone compounds.

  通过将醛或酮化合物和多羟基化合物以多羟基化合物与醛或酮化合物的摩尔比至少为3:1的比例送入反应区域，在固体酸的存在下（如酸性离子交换树脂）中反应这些化合物，生成液体反应混合物而不将水从反应混合物中分离出来，将液体反应混合物从反应区域中作为液体产品流撤出，并将液体反应产物流送入蒸馏塔以从未反应的多羟基化合物中分离出环状缩醛化合物，并可选择性地将未反应的多羟基化合物回收到反应区域。该过程以至少90%的产率生产环状缩醛化合物，并具有长寿命的催化剂。该过程也适用于从酮化合物制备环状缩酮。
• PRODUCTION OF CYCLIC ACETALS OR KETALS USING LIQUID-PHASE ACID CATALYSTS
  申请人：Terrill Daniel Latham

  公开号：US20120330033A1

  公开（公告）日：2012-12-27

  A process for making a cyclic compounds such as cyclic acetal or cyclic ketones by feeding aldehyde or ketone compounds and polyhydroxyl compounds to a reaction vessel at a molar ratio of polyhydroxyl compounds to aldehyde or ketone compounds of at least 3:1, reacting these compounds in the presence of a homogeneous acid catalyst to generate a liquid phase homogeneous reaction mixture containing the acid catalyst without separating water from the reaction mixture as it is being formed in the reaction mixture, withdrawing the liquid phase homogeneous reaction mixture from the reaction vessel as a liquid product stream, and feeding the liquid reaction product stream to a distillation column to separate cyclic acetal compounds from unreacted polyhydroxyl compounds, and optionally recycling back the unreacted polyhydroxyl compounds and/or acid catalyst to the reaction vessel. The process produces cyclic acetal compounds in high yields. The process is also suitable to make cyclic ketals from ketone compounds.

  通过将醛或酮化合物和多羟基化合物以多羟基化合物与醛或酮化合物的摩尔比至少为3:1的比例加入到反应容器中，通过在均相酸催化剂存在下反应这些化合物，生成含有酸催化剂的液相均相反应混合物，而不从反应混合物中分离水，将液相均相反应混合物从反应容器中作为液体产品流撤出，并将液体反应产物流送入蒸馏塔以将环状缩醛化合物与未反应的多羟基化合物分离，并可选择性地将未反应的多羟基化合物和/或酸催化剂回收到反应容器中。该过程以高产率生产环状缩醛化合物。该过程也适用于从酮化合物制备环状缩酮。
• PRODUCTION OF HYDROXY ETHER HYDROCARBONS BY LIQUID PHASE HYDROGENOLYSIS OF CYCLIC ACETALS OR CYCLIC KETALS
  申请人：Billodeaux Damon Ray

  公开号：US20120330069A1

  公开（公告）日：2012-12-27

  A liquid phase hydrogenolysis of acetal compounds such as cyclic acetals and cyclic ketals are fed to a reaction zone and reacted in the presence of a noble metal catalyst supported on a carbon or silica support to make hydroxy ether mono-hydrocarbons in high selectivity, without the necessity to use acidic co-catalysts such as phosphorus containing acids or stabilizers such as hydroquinone.

  将环丙二醛和环酮等缩醛类化合物进行液相氢解反应，将其送入反应区，在贵金属催化剂的存在下，在碳或硅基负载物上反应，高选择性地制备羟基醚单一碳氢化合物，无需使用含磷酸类酸或稳定剂如羟基苯酚。