4,9-Diacetoxy-2,3-dihydro-2,2,4,4-tetramethylnaphtho<2,3-b>furan | 133700-97-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 萘并呋喃类
• 英文名称: 4,9-Diacetoxy-2,3-dihydro-2,2,4,4-tetramethylnaphtho<2,3-b>furan
• 英文别名: 4,9-diacetoxy-2,3-dihydro-2,2,3,3-tetramethylnaphtho<2,3-b>furan；4,9-diacetoxy-2,3-dihydro-2,2,3,3-tetramethylnaphtho[2,3-b]furan；(9-acetyloxy-2,2,3,3-tetramethylbenzo[f][1]benzofuran-4-yl) acetate
• CAS: 133700-97-7
• 化学式: C₂₀H₂₂O₅
• 分子量: 342.392
• InChiKey: DMIKDLJWYWDBMP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.14
• 重原子数：
  25.0
• 可旋转键数：
  2.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  61.83
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为产物：
  描述：

  2-羟基-1,4-萘醌 在 吡啶 作用下， 以 丙酮 为溶剂， 反应 17.0h， 生成 4,9-Diacetoxy-2,3-dihydro-2,2,4,4-tetramethylnaphtho<2,3-b>furan
  参考文献：
  名称：

  Photoinduced molecular transformations. 140. New one-step general synthesis of naphtho[2,3-b]furan-4,9-diones and their 2,3-dihydro derivatives by the regioselective [3 + 2] photoaddition of 2-hydroxy-1,4-naphthoquinones with various alkynes and alkenes: application of the photoaddition to a two-step synthesis of maturinone

  摘要：

  2,3-Dihydronaphtho[2,3-b]furan-4,9-diones can now be produced in one step in 41-83% yields by an unprecedented regioselective [3 + 2] photoaddition of 2-hydroxy-1,4-naphthoquinones with a variety of alkenes. The dihydronaphthofurandiones can be readily transformed into naphtho[2,3-b]furan-4,9-diones. This new photoaddition reaction has been successfully applied to a two-step synthesis of maturinone, a constituent of Cacalia decomposita A Gray. Naphtho[2,3-b]furan-4,9-diones can also be obtained directly by a new [3 + 2] photoaddition of 2-hydroxy-1,4-naphthoquinone with various alkynes in acetone. The photoaddition between 2-hydroxy-1,4-naphthoquinones and alkenes in acetone involves an initial formation of furanohydroquinones, which are oxidized to furanoquinones. A quenching experiment together with the regioselective nature of photoaddition indicate that the photoaddition is a two-step process from a triplet of excited quinones and involves more stabilized polar biradicals or ionic intermediates generated from them by an intramolecular electron transfer from which the furanohydroquinones are formed.

  DOI：

  10.1021/jo00069a023

文献信息

• Photoinduced molecular transformations. Part 120. New one-step general synthesis of 2,3-dihydronaphtho[2,3-b]-furan-4,9-diones by regioselective photoaddition of 2-hydroxy-1,4-naphthoquinones with various alkenes and its application to a two-step synthesis of maturinone
  作者：Kazuhiro Kobayashi、Hideki Shimizu、Akiyoshi Sasaki、Hiroshi Suginome

  DOI：10.1021/jo00010a003

  日期：1991.5

  A one-step formation of 2,3-dihydronaphtho-[2,3-b]furan-4,9-diones in 41-83% by a new 2 + 3 type regioselective photoaddition of 2-hydroxy-1,4-naphthoquinones with a variety of alkenes is reported. The dihydronaphthofurandiones can readily be transformed into naphtho[2,3-b]furan-4,9-diones including a natural quinone, maurinone.