methyl 2-pentachlorophenyl-2-oxo-ethanoate | 38449-81-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: methyl 2-pentachlorophenyl-2-oxo-ethanoate
• 英文别名: methyl pentachlorophenylglyoxylate；Pentachlorbenzoylameisensaeuremethylester；Methyl 2-oxo-2-(2,3,4,5,6-pentachlorophenyl)acetate
• CAS: 38449-81-9
• 化学式: C₉H₃Cl₅O₃
• 分子量: 336.386
• InChiKey: KMSVIKCBEWZDES-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  17
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.11
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  methyl 2-pentachlorophenyl-2-oxo-ethanoate 在 HCl 作用下， 以 乙醚 、 正己烷 为溶剂， 生成 Pentachlorbenzoesaeure-bispentafluorphenylmethylester
  参考文献：
  名称：

  Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: F: PerFHalOrg.4, 1.3.3.8, page 33 - 59

  摘要：

  DOI：
• 作为产物：
  描述：

  hexachlorotropone 、 2,5-dihydro-2,2-dimethoxy-5,5-dimethyl-1,3,4-oxadiazole 以 苯 为溶剂， 反应 24.0h， 以44%的产率得到methyl 2-pentachlorophenyl-2-oxo-ethanoate
  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

• Polyfluoroaryl organometallic compounds. Part XV. Synthesis and rearrangement of polyhalogenoaryl α-diketones
  作者：R. D. Chambers、M. Clark、D. J. Spring

  DOI：10.1039/p19720002464

  日期：——

  dimethyl or diethyl oxalate. Decafluorobenzil undergoes fast base-catalysed rearrangement to the benzilic acid or ester and it is proposed that the transition-state in the process has considerable benzenide character. Attempts to synthesise perfluorophenanthrene-9,10-quinone. by an analogous route, led only to products of rearrangement.

  十氟苯和十氯苯是通过相应的芳基锂与草酸二甲酯的反应制得的，表明该过程涉及加合物的中间体。不对称的苯甲醚C 6 F 5 ·CO·-CO·C 6 H 5和C 6 H 5 ·CO·CO·C 6 Cl 5通过将不同的芳基-锂顺序地加到草酸二甲酯或二乙酯中可得到α-己内酰胺。十氟苯经过碱的快速催化重排，生成苯甲酸或酯，并提出该过程中的过渡态具有显着的苯甲酰胺特性。尝试合成全氟菲-9,10-醌。通过类似的途径，只会导致产品重排。
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: F: PerFHalOrg.4, 1.3.3.8, page 33 - 59
  作者：

  DOI：——

  日期：——
• 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.