[2-[Tert-butyl(dimethyl)silyl]-4-prop-2-enylfuran-3-yl]methanol | 125849-84-5

• 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: [2-[Tert-butyl(dimethyl)silyl]-4-prop-2-enylfuran-3-yl]methanol
• CAS: 125849-84-5
• 化学式: C₁₄H₂₄O₂Si
• 分子量: 252.429
• InChiKey: LTRSMLMROBMLQC-UHFFFAOYSA-N

物化性质

• 沸点：
  300.5±42.0 °C(predicted)
• 密度：
  0.95±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.22
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.57
• 拓扑面积：
  33.4
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  [2-[Tert-butyl(dimethyl)silyl]-4-prop-2-enylfuran-3-yl]methanol 在 sodium hydride 作用下， 以 四氢呋喃 为溶剂， 反应 16.0h， 以91%的产率得到(4-Allyl-furan-3-ylmethoxy)-tert-butyl-dimethyl-silane
  参考文献：
  名称：

  Regioselective Preparation of 2,4-, 3,4-, and 2,3,4-Substituted Furan Rings. 1. [1,4] O → C and [1,4] C → O Silyl Migrations of Silyl Ethers and Esters Attached to Furan and Thiophene Rings

  摘要：

  [1,4] O --> C and [1,4] C --> O rearrangements are described for a variety of furans and thiophenes. Treatment of 3-((silyloxy)methyl)furans and -thiophenes with n-BuLi in HMPA provided 2-silylated-3-(hydroxymethyl)furans and -thiophenes in good to excellent yields. The reaction was shown by crossover studies to proceed via an intramolecular [1,4] O --> C silyl migration. Silyl esters of 3-furoic acids also underwent an intramolecular [1,4] O --> C silyl migration to provide 2-silylated-3-furoic acids in moderate to good yield when treated with a mixture of LDA and HMPA. Finally, the above silyl migrations were shown to be reversible. Treatment of 2-silylated-3-(hydroxymethyl)furans and -thiophenes with NaH in DMF provided 3-((silyloxy)methyl)furans and -thiophenes in excellent yields via a [1,4] C --> O silyl migration. The [1,4] C --> O silyl migration was also shown to be an intramolecular process by a crossover study.

  DOI：

  10.1021/jo971097j
• 作为产物：
  描述：

  3-呋喃甲醇,2-[(1,1-二甲基乙基)二甲基甲硅烷基]- 、 3-溴丙烯 在 正丁基锂 、 lithium chloride 作用下， 生成 [2-[Tert-butyl(dimethyl)silyl]-4-prop-2-enylfuran-3-yl]methanol
  参考文献：
  名称：

  Regioselective Preparation of 2,4-, 3,4-, and 2,3,4-Substituted Furan Rings. 2.¹ Regioselective Lithiation of 2-Silylated-3-substituted Furan Rings

  摘要：

  A new method for the preparation of 3,4- and 2,5-disubstituted furan rings is described. A variety of 2-silylated-3-(hydroxymethyl)furans and 2-silylated-3-furoic acids lithiate exclusively at C-4 when treated with 2.2 equivs of BuLi. The resulting dianions were quenched with a variety of electrophiles to provide 2-silylated-3-(hydroxymethyl)-substituted furans and 2-silylated-4-substituted 3-furoic acids in good to excellent yields. Removal of the silyl group (n-Bu4NF) provided a variety of 4-substituted-3-(hydroxymethyl)furans and methyl 4-substituted-3-furoates, respectively. The latter esters were prepared due to difficulties encountered in isolating 4-substituted-3-furoic acids. The site of lithiation was altered by protecting the 3-hydroxyl group with a triethylsilane. Lithiation of 2-silylated-3-(((triethylsilyl)oxy)methyl)furan with 1.2 equivs of BuLi followed by the addition of electrophiles provided 2-silylated-3-(((triethylsilyl)oxy)methyl)-5-substituted furan rings. Subsequent removal of both silyl groups provided 2,4-disubstituted furan rings in moderate to good yields. A rationale is provided to explain why protection of the hydroxyl group at C-3 leads to a change in lithiation from the C-4 to the C-5 position of the furan ring. In addition, an explanation for the observed effect of adding HMPA or LiCl to the solution during the lithiation of 2-(tert-butyldimethylsilyl)-3-(hydroxymethyl)furan is provided.

  DOI：

  10.1021/jo971098b

文献信息

• The 1,4 C→O silyl migrations of various furan and thiophene systems
  作者：Patrick G. Spinazzé、Brian A. Keay

  DOI：10.1016/s0040-4039(00)99574-1

  日期：——
• SPINAZZE, PATRICK G.;KEAY, BRIAN A., TETRAHEDRON LETT., 30,(1989) N4, C. 1765-1768
  作者：SPINAZZE, PATRICK G.、KEAY, BRIAN A.

  DOI：——

  日期：——