2,5-二甲基环戊-2-烯-1-酮 | 4041-11-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 2,5-二甲基环戊-2-烯-1-酮
• 中文别名: 2,5-二甲基-2-环戊烯-1-酮
• 英文名称: 2,5-Dimethyl-cyclopent-2-en-1-on
• 英文别名: 2,5-Dimethyl-2-cyclopentenon；2,5-Dimethylcyclopent-2-en-1-one
• CAS: 4041-11-6
• 化学式: C₇H₁₀O
• 分子量: 110.156
• InChiKey: GBTHLOLSKPVPOD-UHFFFAOYSA-N

物化性质

• 沸点：
  59.2-59.4 °C(Press: 19 Torr)
• 密度：
  0.9411 g/cm3
• 保留指数：
  1351
• 稳定性/保质期：
  存在于主流烟气中。

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

安全信息

• 海关编码：
  2914299000

反应信息

• 作为反应物：
  描述：

  2,5-二甲基环戊-2-烯-1-酮 在 lithium aluminium tetrahydride 作用下， 以 乙醚 为溶剂， 生成 1,3-dimethylcyclopentadiene
  参考文献：
  名称：

  Cyclic unsaturated compounds

  摘要：

  DOI：

  10.1007/bf00854109
• 作为产物：
  描述：

  2,5-二甲基-环戊酮 在 溴 、 sodium acetate 作用下， 以 四氯化碳 、 溶剂黄146 为溶剂， 生成 2,5-二甲基环戊-2-烯-1-酮
  参考文献：
  名称：

  Electrochemical reduction of .alpha.,.alpha.'-dibromo ketones in acetic acid. Convenient synthetic route to highly branched .alpha.-acetoxy ketones

  摘要：

  DOI：

  10.1021/jo00913a001

文献信息

• Synthesis of Cyclopentadiene and Methylcyclopentadiene with Xylose or Extracted Hemicellulose
  作者：Zhenjie Yu、Zhufan Zou、Ran Wang、Guangyi Li、Aiqin Wang、Yu Cong、Tao Zhang、Ning Li

  DOI：10.1002/anie.202300008

  日期：2023.3.20

  A highly integrated two-step strategy was developed for the selective synthesis of renewable cyclopentadiene (CPD) and methylcyclopentadiene (MCPD) with xylose or the hemicelluloses extracted from real biomass. Compared with the conventional fossil route, the new synthetic strategy has evident advantages in the renewability and higher availability of feedstock.

  开发了一种高度集成的两步策略，用于使用木糖或从实际生物质中提取的半纤维素选择性合成可再生环戊二烯 (CPD) 和甲基环戊二烯 (MCPD)。与传统的化石路线相比，新的合成策略在原料的可再生性和更高的可用性方面具有明显优势。
• Process for purification of methacrylic acid
  申请人：AMOCO CORPORATION

  公开号：EP0178168A2

  公开（公告）日：1986-04-16

  A method for inhibiting the polymerization of an alpha-, beta-ethylenically unsaturated monocarboxylic acid during its recovery by distillation is disclosed.

  本发明公开了一种在蒸馏回收过程中抑制α-、β-乙烯基不饱和单羧酸聚合的方法。
• Catalyst for production of alpha,beta-ethylenically unsaturated monocarboxylic acid
  申请人：AMOCO CORPORATION

  公开号：EP0255395A1

  公开（公告）日：1988-02-03

  A catalyst and process for production of an alpha, beta-ethylenically unsaturated monocarboxylic acid made by condensing formaldehyde with, for example, propionic acid, which catalyst is made from a SiO₂-SnO₂ mixed-oxide compo­nent consisting of porous silica gel and tin (IV) oxide and a cesium ion component.

  一种催化剂和工艺，用于生产由甲醛与丙酸等缩合而成的 α、β-乙烯基不饱和单羧酸，该催化剂由多孔硅胶和锡（IV）氧化物组成的 SiO₂-SnO₂混合氧化物组分以及铯离子组分制成。
• Continuous process for production of methacrylic acid ester of C1 to C4 aliphatic alcohol
  申请人：AMOCO CORPORATION

  公开号：EP0255773A2

  公开（公告）日：1988-02-10

  A continuous process for the production of a metha­crylic acid ester of a C₁ to C₄ saturated aliphatic alco­hol in the presence of a catalyst is disclosed. This process contemplates continuously introducing into a plug-­flow reactor a feed stream containing methacrylic acid, a C₁ to C₄ saturated aliphatic alcohol in stoichiometric excess relative to the methacrylic acid present, an ester­ification catalyst, and a liquid organic substance having a volatility no greater than that of methacrylic acid. The feed stream thus introduced into the plug-flow reactor is preferably maintained at substantially atmospheric pressure, while the contained methacrylic acid reactant is held at an esterification temperature and for a time period sufficient to esterify at least a portion of the introduced methacrylic acid. The admixture thus produced is continuously fractionated, preferably in a distillation zone or column, into a vaporized distillate stream and a liquid bottoms stream. The distillate stream has a rela­tively greater methacrylic acid ester content than the bottoms stream. A portion of the bottoms stream, consti­tuted primarily by the liquid organic substance and the esterification catalyst, is recycled to the reactor while the remainder is purged.

  本发明公开了一种在催化剂存在下生产 C₁ 至 C₄ 饱和脂肪醇的甲基丙烯酸酯的连续工艺。该工艺考虑向塞流反应器中连续导入进料流，进料流中含有甲基丙烯酸、相对于所含甲基丙烯酸按化学计量过量的 C₁ 至 C₄ 饱和脂肪醇、酯化催化剂和挥发性不大于甲基丙烯酸的液态有机物。这样引入塞流式反应器的进料流最好保持在基本大气压下，而所含的甲基丙烯酸反应物则保持在酯化温度下，并有足够的时间使至少一部分引入的甲基丙烯酸酯化。这样产生的混合物被连续分馏，最好是在蒸馏区或蒸馏塔中分馏成气化蒸馏物流和液态底部流。馏出液的甲基丙烯酸酯含量相对高于底液。主要由液态有机物和酯化催化剂构成的部分底流被回收到反应器中，而其余部分被净化。
• Process for producing Si02 Sn02 mixed oxide
  申请人：AMOCO CORPORATION

  公开号：EP0400692A1

  公开（公告）日：1990-12-05

  A method is provided for making a SiO₂-SnO₂ mixed-oxide which comprises the steps of: combining, with agitation, respective effective amounts of a silica sol containing silica particles of 50 to 200 (5 to 20nm) Angstroms in diameter, and a slurry of SnO₂ containing particles of SnO₂ to produce a freely-flowing slurry having a SiO₂-SnO₂ weight ratio of 0.05 to 6; solidifying the produced, freely-flowing slurry to a gel; drying the obtained gel to a crushable solid state; and calcining the dried gel for a time period sufficient to remove adsorbed moisture therefrom.

  提供了一种制造氧化硅-氧化锡混合氧化物的方法，该方法包括以下步骤： 在搅拌下，将各自有效量的含有直径为 50 至 200 (5 至 20nm) 埃的二氧化硅颗粒的二氧化硅溶胶和含有二氧化锡颗粒的二氧化锡浆料混合，以产生自由流动的浆料，该浆料的二氧化硅-二氧化锡重量比为 0.05 至 6； 将产生的自由流动浆料凝固成凝胶体； 将得到的凝胶干燥至可粉碎的固体状态；以及 将干燥的凝胶煅烧足够长的时间，以除去其中吸附的水分。