4(1-Acetoxy-9-thiophen-2-ylnonyl)-2-trimethylsilylfuran | 136617-83-9

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: 4(1-Acetoxy-9-thiophen-2-ylnonyl)-2-trimethylsilylfuran
• 英文别名: [9-thiophen-2-yl-1-(5-trimethylsilylfuran-3-yl)nonyl] acetate
• CAS: 136617-83-9
• 化学式: C₂₂H₃₄O₃SSi
• 分子量: 406.662
• InChiKey: AIDCTFJQVIMRRC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.46
• 重原子数：
  27
• 可旋转键数：
  13
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.59
• 拓扑面积：
  67.7
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  4(1-Acetoxy-9-thiophen-2-ylnonyl)-2-trimethylsilylfuran 在 rose bengal 氧气 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以92%的产率得到Acetic acid 1-(2-hydroxy-5-oxo-2,5-dihydro-furan-3-yl)-9-thiophen-2-yl-nonyl ester
  参考文献：
  名称：

  Singlet oxygen oxidation of substituted furans to 5-hydroxy-2(5H)-furanone

  摘要：

  The conditions for the regiospecific singlet oxygen oxidation of various 2,4-disubstituted furans 9 to 4-substituted-2 (5H)-furanones 3 are developed. The presence of a C-2 substituent (e.g., trimethylsilyl, tert-butyldimethylsilyl, or tributylstannyl) in 9 is an absolute requirement for the formation of the 4-substituted-5-hydroxy-2(5H)-furanone regioisomer 3. When the C-2 substituent is triethylsilyl (TES) or TBDMS, however, apart from 3, the corresponding 5-trialkylsiloxy derivative 11 is also isolated in a significant amount. These silyl acetals are unexpectedly stable but can be hydrolyzed back to 3 on stirring with dilute acid. The formation of silyl acetals, to our knowledge, has never been reported in the singlet oxygen oxidation of (trialkylsilyl)furan. A plausible mechanism for their formation is proposed. The presence of a catalytic amount of water in the oxidation of 2-(trialkylsilyl)-4-substituted-furans not only eliminates the formation of the silyl acetals but also speeds up the rate of the oxidation process. Moreover, the oxidation can then be carried out at 0-degrees-C instead of at -78-degrees-C. Oxidation of 2-(1-hydroxyalkyl)-4-substituted-furans in the absence of a reducing agent gives little or no sign of 2,5-disubstituted-6-hydroxy-3(2H)-pyranone 23 but instead 26 selectively. Thus, the (1-hydroxy)alkyl group can be utilized as the trialkylsilyl or trialkylstannyl group in dictating the regioselectivity in the singlet oxygen oxidation of substituted furans.

  DOI：

  10.1021/jo00025a012
• 作为产物：
  描述：

  2-(trimethylsilyl)-4-furaldehyde 在 magnesium 作用下， 以 四氢呋喃 为溶剂， 生成 4(1-Acetoxy-9-thiophen-2-ylnonyl)-2-trimethylsilylfuran
  参考文献：
  名称：

  Singlet oxygen oxidation of substituted furans to 5-hydroxy-2(5H)-furanone

  摘要：

  The conditions for the regiospecific singlet oxygen oxidation of various 2,4-disubstituted furans 9 to 4-substituted-2 (5H)-furanones 3 are developed. The presence of a C-2 substituent (e.g., trimethylsilyl, tert-butyldimethylsilyl, or tributylstannyl) in 9 is an absolute requirement for the formation of the 4-substituted-5-hydroxy-2(5H)-furanone regioisomer 3. When the C-2 substituent is triethylsilyl (TES) or TBDMS, however, apart from 3, the corresponding 5-trialkylsiloxy derivative 11 is also isolated in a significant amount. These silyl acetals are unexpectedly stable but can be hydrolyzed back to 3 on stirring with dilute acid. The formation of silyl acetals, to our knowledge, has never been reported in the singlet oxygen oxidation of (trialkylsilyl)furan. A plausible mechanism for their formation is proposed. The presence of a catalytic amount of water in the oxidation of 2-(trialkylsilyl)-4-substituted-furans not only eliminates the formation of the silyl acetals but also speeds up the rate of the oxidation process. Moreover, the oxidation can then be carried out at 0-degrees-C instead of at -78-degrees-C. Oxidation of 2-(1-hydroxyalkyl)-4-substituted-furans in the absence of a reducing agent gives little or no sign of 2,5-disubstituted-6-hydroxy-3(2H)-pyranone 23 but instead 26 selectively. Thus, the (1-hydroxy)alkyl group can be utilized as the trialkylsilyl or trialkylstannyl group in dictating the regioselectivity in the singlet oxygen oxidation of substituted furans.

  DOI：

  10.1021/jo00025a012

文献信息

• Anti-inflammatory furanones
  申请人：Allergan, Inc.

  公开号：US05134128A1

  公开（公告）日：1992-07-28

  New 5-hydroxy-2-furanone compounds having anti-inflammatory, immunosuppressive and anti-proliferative activity and are useful in treating psoriasis and modifying calcium homeostasis.

  新的具有抗炎、免疫抑制和抗增殖活性的5-羟基-2-呋喃酮化合物对治疗牛皮癣和调节钙稳态具有用处。