dimethoxy(hexachloro)heptafulvene | 231304-55-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: dimethoxy(hexachloro)heptafulvene
• 英文别名: 1,2,3,4,5,6-Hexachloro-7-(dimethoxymethylidene)cyclohepta-1,3,5-triene
• CAS: 231304-55-5
• 化学式: C₁₀H₆Cl₆O₂
• 分子量: 370.874
• InChiKey: OARPZLPXTOWJGZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  18
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.2
• 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：

  dimethoxy(hexachloro)heptafulvene 在 水 作用下， 以 二氯甲烷 为溶剂， 反应 48.0h， 以89%的产率得到7-carbomethoxy-1,2,3,4,5,6-hexachlorocycloheptatriene
  参考文献：
  名称：

  Reactions of Dimethoxycarbene with Cyclic Perchlorinated Olefins and Ketones

  摘要：

  Reactions of dimnethoxycarbene (2), a carbonyl group equivalent, with perchlorinated olefins and ketones were investigated. Thermolysis of 2,2-dimethoxy-5,5-dimethyl-Delta(3)-1,3,4-oxadiazoline (1) at 110 degrees C generated 2, which reacted with hexachlorocyclopentadiene (4), octachlorocycloheptatriene (12), octachlolobicyclo[3.2.0]hepta-3,6-diene (24), hexachlorotropone (28), hexachlorobicyclo[3.2.0]-hepta-3,6-dien-2-one (32), and tetrachloro-1,4-benzoquinone (35). Reactions of 2 with perchlorinated olefins 4, 12, and 24 led to esters or, in the case of 12, to a ketene acetal. Their formation is rationalized in terms of Michael-like addition and displacement (S(N)2' or S(N)2", if concerted) of allylic chlorine atoms by 2, yielding ion pairs that either dechloromethylate to esters or dechlorinate to a ketene acetal, In contrast, the reactions of 2 with unsaturated perchloroketones 28, 32, and 35 led to ring contraction, ring expansion, and aromatization, respectively. The products from these reactions are consistent with nucleophilic addition of 2 at the carbonyl moiety rather than Michael-type addition. Dimethoxycarbene-d(3) was used to show that demethylation in the latter reaction was intermolecular. Mechanisms for the different reaction courses are proposed.

  DOI：

  10.1021/jo9823846
• 作为产物：
  描述：

  octachlorobicyclo<3.2.0>hepta-3,6-diene 在 2,5-dihydro-2,2-dimethoxy-5,5-dimethyl-1,3,4-oxadiazole 作用下， 以 苯 为溶剂， 反应 24.0h， 以3%的产率得到dodecachloroheptafulvalene
  参考文献：
  名称：

  Reactions of Dimethoxycarbene with Cyclic Perchlorinated Olefins and Ketones

  摘要：

  Reactions of dimnethoxycarbene (2), a carbonyl group equivalent, with perchlorinated olefins and ketones were investigated. Thermolysis of 2,2-dimethoxy-5,5-dimethyl-Delta(3)-1,3,4-oxadiazoline (1) at 110 degrees C generated 2, which reacted with hexachlorocyclopentadiene (4), octachlorocycloheptatriene (12), octachlolobicyclo[3.2.0]hepta-3,6-diene (24), hexachlorotropone (28), hexachlorobicyclo[3.2.0]-hepta-3,6-dien-2-one (32), and tetrachloro-1,4-benzoquinone (35). Reactions of 2 with perchlorinated olefins 4, 12, and 24 led to esters or, in the case of 12, to a ketene acetal. Their formation is rationalized in terms of Michael-like addition and displacement (S(N)2' or S(N)2", if concerted) of allylic chlorine atoms by 2, yielding ion pairs that either dechloromethylate to esters or dechlorinate to a ketene acetal, In contrast, the reactions of 2 with unsaturated perchloroketones 28, 32, and 35 led to ring contraction, ring expansion, and aromatization, respectively. The products from these reactions are consistent with nucleophilic addition of 2 at the carbonyl moiety rather than Michael-type addition. Dimethoxycarbene-d(3) was used to show that demethylation in the latter reaction was intermolecular. Mechanisms for the different reaction courses are proposed.

  DOI：

  10.1021/jo9823846

文献信息

• Reactions of Dimethoxycarbene with Cyclic Perchlorinated Olefins and Ketones
  作者：James A. Dunn、John Paul Pezacki、Michael J. McGlinchey、John Warkentin

  DOI：10.1021/jo9823846

  日期：1999.6.1

  Reactions of dimnethoxycarbene (2), a carbonyl group equivalent, with perchlorinated olefins and ketones were investigated. Thermolysis of 2,2-dimethoxy-5,5-dimethyl-Delta(3)-1,3,4-oxadiazoline (1) at 110 degrees C generated 2, which reacted with hexachlorocyclopentadiene (4), octachlorocycloheptatriene (12), octachlolobicyclo[3.2.0]hepta-3,6-diene (24), hexachlorotropone (28), hexachlorobicyclo[3.2.0]-hepta-3,6-dien-2-one (32), and tetrachloro-1,4-benzoquinone (35). Reactions of 2 with perchlorinated olefins 4, 12, and 24 led to esters or, in the case of 12, to a ketene acetal. Their formation is rationalized in terms of Michael-like addition and displacement (S(N)2' or S(N)2", if concerted) of allylic chlorine atoms by 2, yielding ion pairs that either dechloromethylate to esters or dechlorinate to a ketene acetal, In contrast, the reactions of 2 with unsaturated perchloroketones 28, 32, and 35 led to ring contraction, ring expansion, and aromatization, respectively. The products from these reactions are consistent with nucleophilic addition of 2 at the carbonyl moiety rather than Michael-type addition. Dimethoxycarbene-d(3) was used to show that demethylation in the latter reaction was intermolecular. Mechanisms for the different reaction courses are proposed.