(E)-ethyl 4-(tert-butyldimethylsilyl)-2-hydroxybut-3-enoate | 1443779-99-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羟基酸及其衍生物
• 英文名称: (E)-ethyl 4-(tert-butyldimethylsilyl)-2-hydroxybut-3-enoate
• CAS: 1443779-99-4
• 化学式: C₁₂H₂₄O₃Si
• 分子量: 244.406
• InChiKey: AWXLHMSXXVBLKE-CMDGGOBGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.51
• 重原子数：
  16.0
• 可旋转键数：
  4.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  46.53
• 氢给体数：
  1.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  (E)-ethyl 4-(tert-butyldimethylsilyl)-2-hydroxybut-3-enoate 在 titanium(IV) isopropylate 、 叔丁基过氧化氢 、 4-二甲氨基吡啶 、 L-(+)-酒石酸二异丙酯 、 三乙胺 、 lithium diisopropyl amide 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 320.08h， 生成 (R)-ethyl-4-(tert-butyldimethylsilyl)-2-((diisopropylcarbamoyl)oxy)-4-hydroxybut-2-enoate
  参考文献：
  名称：

  Chirality transfer in Brook rearrangement-mediated SE2′ solvolytic protonation and its use in estimation of the propensity for racemization of the α-lithiocarbanions of the substituents

  摘要：

  Chirality transfer from an alpha-silylalcohol to alpha-carbmoyloxy- and alpha-siloxyallyl-carbanions was investigated using a Brook rearrangement-mediated S(E)2' protonation in gamma-carbamoyloxy- and gamma-siloxy-alpha-silylallyl alcohols. We proposed a hypothesis that the reaction proceeds along one of two pathways that involves (1) a concerted protonation of a silicate intermediate and (2) a concerted lithiation of the intermediate followed by protonation with retention or by protonation after racemization. Comparison of the extent of the chirality transfer provides a new method for semi-quantitative evaluation of the propensity for racemization of lithiocarbanions next to a conjugative electron-withdrawing group. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.05.043
• 作为产物：
  描述：

  (E)-3-(tert-butyldimethylsilyl)acrylaldehyde 在 三甲基氯硅烷 、 氢氟酸 、 zinc(II) iodide 作用下， 反应 31.67h， 生成 (E)-ethyl 4-(tert-butyldimethylsilyl)-2-hydroxybut-3-enoate
  参考文献：
  名称：

  Chirality transfer in Brook rearrangement-mediated SE2′ solvolytic protonation and its use in estimation of the propensity for racemization of the α-lithiocarbanions of the substituents

  摘要：

  Chirality transfer from an alpha-silylalcohol to alpha-carbmoyloxy- and alpha-siloxyallyl-carbanions was investigated using a Brook rearrangement-mediated S(E)2' protonation in gamma-carbamoyloxy- and gamma-siloxy-alpha-silylallyl alcohols. We proposed a hypothesis that the reaction proceeds along one of two pathways that involves (1) a concerted protonation of a silicate intermediate and (2) a concerted lithiation of the intermediate followed by protonation with retention or by protonation after racemization. Comparison of the extent of the chirality transfer provides a new method for semi-quantitative evaluation of the propensity for racemization of lithiocarbanions next to a conjugative electron-withdrawing group. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.05.043