2,3-二叔丁氧基-4-羟基-2-环丁烯-1-酮 | 144791-02-6

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 乙烯酯类
• 中文名称: 2,3-二叔丁氧基-4-羟基-2-环丁烯-1-酮
• 英文名称: 2,3-Di-tert-butoxy-4-hydroxy-2-cyclobuten-1-one
• 英文别名: 4-hydroxy-2,3-bis[(2-methylpropan-2-yl)oxy]cyclobut-2-en-1-one
• CAS: 144791-02-6
• 化学式: C₁₂H₂₀O₄
• 分子量: 228.288
• InChiKey: BLYKNWIJVHOPRO-UHFFFAOYSA-N

物化性质

• 沸点：
  379.7±42.0 °C(Predicted)
• 密度：
  1.08±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  55.8
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2,3-二叔丁氧基-4-羟基-2-环丁烯-1-酮 在 盐酸 作用下， 以 二氯甲烷 为溶剂， 反应 12.0h， 以91%的产率得到3-tert-Butoxy-3-cyclobutene-1,2-dione
  参考文献：
  名称：

  A method for the stereoselective construction of 4-alkoxy-5-alkylidenecyclopentenones by the tandem ring expansion-functionalization of 1-alkynylcyclobutenols using a palladium-mercury cocatalytic system

  摘要：

  1-(1-Alkynyl)-4-methoxy-4-methyl-2-cyclobutenols, prepared by nucleophilic functionalization of cyclobutenediones, were transformed with high stereoselectivity into 4-methoxy-4-methyl-5-alkylidenecyclopentenones. The action of stoichiometric Hg(OCOCF3)(2) and then metathesis with NaCl produced 5-(1-(chloromercurio)alkylidene)-4-methoxy-4-methyl-2-cyclopentenones which were stereospecifically functionalized by palladium-mediated allylation and hydroxybutenylation. Treatment with Br-2/DMSO led to stereospecific bromodemercuration. The 1-(1-alkynyl)-4-methoxy-4-methyl-2-cyclobutenols underwent efficient and very stereoselective tandem ring expansion-functionalizations in the presence of three different allylic chlorides and a catalyst system composed of 10% Hg(OCOCF3)(2) and 10% PdCl2. All products can be obtained with a stereoselectivity greater than 99:1 at the exocyclic alkene.

  DOI：

  10.1021/jo00084a038
• 作为产物：
  描述：

  3,4-二(叔丁氧基)-3-环丁烯-1,2-二酮 在 lithium tri-t-butoxyaluminum hydride 作用下， 以 四氢呋喃 为溶剂， 以98%的产率得到2,3-二叔丁氧基-4-羟基-2-环丁烯-1-酮
  参考文献：
  名称：

  A method for the stereoselective construction of 4-alkoxy-5-alkylidenecyclopentenones by the tandem ring expansion-functionalization of 1-alkynylcyclobutenols using a palladium-mercury cocatalytic system

  摘要：

  1-(1-Alkynyl)-4-methoxy-4-methyl-2-cyclobutenols, prepared by nucleophilic functionalization of cyclobutenediones, were transformed with high stereoselectivity into 4-methoxy-4-methyl-5-alkylidenecyclopentenones. The action of stoichiometric Hg(OCOCF3)(2) and then metathesis with NaCl produced 5-(1-(chloromercurio)alkylidene)-4-methoxy-4-methyl-2-cyclopentenones which were stereospecifically functionalized by palladium-mediated allylation and hydroxybutenylation. Treatment with Br-2/DMSO led to stereospecific bromodemercuration. The 1-(1-alkynyl)-4-methoxy-4-methyl-2-cyclobutenols underwent efficient and very stereoselective tandem ring expansion-functionalizations in the presence of three different allylic chlorides and a catalyst system composed of 10% Hg(OCOCF3)(2) and 10% PdCl2. All products can be obtained with a stereoselectivity greater than 99:1 at the exocyclic alkene.

  DOI：

  10.1021/jo00084a038

文献信息

• Squaric Acids:  A New Motif for Designing Inhibitors of Protein Tyrosine Phosphatases
  作者：Jian Xie、Anthony B. Comeau、Christopher T. Seto

  DOI：10.1021/ol036121w

  日期：2004.1.1

  Protein tyrosine phosphatases (PTPases) are important targets in medicinal chemistry. These enzymes play a role in a number of human diseases, including type 11 diabetes and infection by Yersinia pestis, the causative agent of bubonic plague. Derivatives of squaric acids such as 2-aryl-1-hydroxycyclobut-1-ene-3,4-diones represent a new class of monoanionic inhibitors for PTPases.
• A potentially general regiospecific synthesis of substituted quinones from dimethyl squarate
  作者：Leah M. Gayo、Michael P. Winters、Harold W. Moore

  DOI：10.1021/jo00051a040

  日期：1992.12

  A potentially general regiospecific synthesis of benzo- and naphthoquinones is described. This method starts with dimethyl squarate (1), which is converted to the cyclobutenone ketal 3 upon sequential treatment with an organolithium reagent and then BF3 etherate or TFAA in THF/methanol. Treatment of these with a second lithium reagent followed by hydrolysis gives the cyclobutenones 5. Addition of an alkynyl-, alkenyl- or aryllithium agent to 5 followed by hydrolysis of the ketal linkage gives the corresponding 4-alkynyl- 4-alkenyl- or 4-aryl-4-hydroxycyclobutenones 7-9, and these readily rearrange to the respective quinones or hydroquinones upon thermolysis in refluxing benzene. In a similar fashion, 15 was employed as a reagent to prepare mono- and disubstituted hydroquinones and quinones.
• A method for the stereoselective construction of 4-alkoxy-5-alkylidenecyclopentenones by the tandem ring expansion-functionalization of 1-alkynylcyclobutenols using a palladium-mercury cocatalytic system
  作者：Lanny S. Liebeskind、Agnes Bombrun

  DOI：10.1021/jo00084a038

  日期：1994.3

  1-(1-Alkynyl)-4-methoxy-4-methyl-2-cyclobutenols, prepared by nucleophilic functionalization of cyclobutenediones, were transformed with high stereoselectivity into 4-methoxy-4-methyl-5-alkylidenecyclopentenones. The action of stoichiometric Hg(OCOCF3)(2) and then metathesis with NaCl produced 5-(1-(chloromercurio)alkylidene)-4-methoxy-4-methyl-2-cyclopentenones which were stereospecifically functionalized by palladium-mediated allylation and hydroxybutenylation. Treatment with Br-2/DMSO led to stereospecific bromodemercuration. The 1-(1-alkynyl)-4-methoxy-4-methyl-2-cyclobutenols underwent efficient and very stereoselective tandem ring expansion-functionalizations in the presence of three different allylic chlorides and a catalyst system composed of 10% Hg(OCOCF3)(2) and 10% PdCl2. All products can be obtained with a stereoselectivity greater than 99:1 at the exocyclic alkene.