2,4-dimethyl-2-cyclopenten-1-one | 23048-13-7

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2,4-dimethyl-2-cyclopenten-1-one
• 英文别名: 2,4-dimethyl-cyclopenten-1-one；dimethyl-2,4 cyclopentene-2 one；2,4-dimethyl-2-cyclopentenone；2,4-dimethyl-cyclopent-2-enone；2,4-Dimethyl-cyclopent-2-enon；(+/-)-2,4-Dimethyl-cyclopent-2-enon；2,4-dimethylcyclopent-2-en-1-one
• CAS: 23048-13-7
• 化学式: C₇H₁₀O
• 分子量: 110.156
• InChiKey: WYBXIBXMYAWJPJ-UHFFFAOYSA-N

物化性质

• 沸点：
  165°C (estimate)
• 密度：
  0.9423

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 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

反应信息

• 作为反应物：
  描述：

  2,4-dimethyl-2-cyclopenten-1-one 生成 alkaline earth salt of/the/ methylsulfuric acid
  参考文献：
  名称：

  Nasarow; Elisarowa, Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1951, p. 295,308

  摘要：

  DOI：
• 作为产物：
  描述：

  3,5-Dimethyl-5-vinyl-Δ²-cyclopentenon-(1) 生成 2,4-dimethyl-2-cyclopenten-1-one
  参考文献：
  名称：

  Chemistry of cyclopentenones

  摘要：

  DOI：

  10.1007/bf00911368

文献信息

• Synthesis of substituted 2-cyclopenten-1-ones from oxodithioesters via a domino process
  作者：Florence Corbin、Carole Alayrac、Patrick Metzner

  DOI：10.1016/s0040-4039(99)00238-5

  日期：1999.3

  thiocarbonyl moiety. Subsequent ring closure was effected by intramolecular addition of the carbanion, generated in situ, to the δ-carbonyl function leading to 2-cyclopenten-1-ones. While most described intramolecular procedures involve a base-catalysed cyclisation, our method is induced by an addition reaction. It is a new efficient synthesis of substituted 2-cyclopenten-1-ones via a domino process.

  将新鲜制备的δ-氧代二硫代酯的亚砜进行化学选择性加成，将甲基锂加到硫代羰基部分的电子贫电子的硫原子上。随后的闭环是通过分子内将在原位产生的碳负离子加到δ-羰基官能团上而产生的2-环戊烯-1-酮来实现的。尽管大多数描述的分子内操作涉及碱催化的环化，但我们的方法是通过加成反应诱导的。它是一种通过多米诺法合成取代的2-环戊烯-1-酮的新有效方法。
• 1,4-Ketoaldehyde durch Michael-Addition deprotonierter Aldimine an 2-(<i>N</i>-Methylanilino)-acrylonitril
  作者：Hubertus Ahlbrecht、Axel Von Daacke

  DOI：10.1055/s-1987-27829

  日期：——

  1,4-Ketoaldehydes via Michael-Addition of deprotonated Aldimines to 2-(N-Methylanilino)-acrylonitrile A new method for the synthesis of the title compounds by a one-pot three component coupling reaction is described. It consists of the reaction of an enolateanion- and an enolcation-equivalent with subsequent alkylation of an acylanion-equivalent.

  通过去质子化醛胺与2-(N-甲基苯胺)-丙烯腈的迈克尔加成制备1,4-酮醛 新的方法描述了通过一步法三组分偶联反应合成该标题化合物。该方法包括酮酸根离子和烯醇阳离子等价物的反应，随后对酰基阴离子等价物进行烷基化。
• Novel High Performance<i>ansa</i>-Zirconocene Catalysts for Isospecific Polymerization of Propylene
  作者：Hiroshi Yamazaki、Keisuke Kimura、Masato Nakano、Tsutomu Ushioda

  DOI：10.1246/cl.1999.1311

  日期：1999.12

  The introduction of furyl groups to the position next to the silylene bridge of an ansa-zirconocene catalyst was found to remarkably enhance the catalytic activity and the molecular weight of PP during the isospecific polymerization of propylene.

  研究发现，将呋喃基引入到 ansa-zircconocene 催化剂的亚甲硅烷桥旁边的位置可以显着提高丙烯等规聚合过程中 PP 的催化活性和分子量。
• Reactivite des gem-dibromocyclopropanes—IV
  作者：Christiane Santelli-Rouvier

  DOI：10.1016/0040-4020(81)85011-9

  日期：1981.1

  By acid catalysis, gem-dihalogenocyclopropylcarbinols are converted into homoallylic α-dihalogenated cations which in general eliminate the hydrogen halide and lead to the 3-halogenopentadienyl cations from which cyclopentenones can be formed by cyclisation. For bicyclo[4.1.0]heptanes, aromatisation of the 3-halogenopentadienyl cation in benzyl bromide is observed.

  通过酸催化，将宝石-二卤代环丙基羰基醇转化成均烯丙基的α-二卤代阳离子，该阳离子通常消除了卤化氢并生成了3-卤代戊二烯基阳离子，可以通过环化反应从中生成环戊烯酮。对于双环[4.1.0]庚烷，在苄基溴中观察到3-卤代戊二烯基阳离子的芳构化。
• Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
  申请人：——

  公开号：US20040242410A1

  公开（公告）日：2004-12-02

  The present invention relates to a transition metal complex represented by the formula (I): 1 wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R 1 )(R 20 )-A-, (b): —C(R 1 )(R 20 )-A 1 (R 30 )—, (c): —C(R 1 )=A 1 -, or (d): —C(R 1 )=A 1 -A 2 -R 30 ; A represents a Group 16 element and A 1 and A 2 each represents a Group 15 element; R 1 to R 9 , R 20 , and R 30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X 1 and X 2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C 1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.

  本发明涉及一种由式(I)表示的过渡金属配合物：1其中M代表4族过渡金属；—Y—表示(a)：—C(R1)(R20)-A-，(b)：—C(R1)(R20)-A1(R30)—，(c)：—C(R1)=A1-，或(d)：—C(R1)=A1-A2-R30；A代表16族元素，A1和A2分别代表15族元素；R1至R9、R20和R30相同或不同，每个代表可选取代的碳氢基团等；X1和X2相同或不同，每个代表氢原子、卤原子、可选取代的C1-10烷基团等，以及其中间产物，以及包括所述过渡金属配合物作为组分的烯烃聚合催化剂。

表征谱图