5-<<(tert-Butyldiphenylsilyl)oxy>methyl>-2,2-dimethyl-5-nitro-1,3-dioxane | 138435-94-6

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 5-<<(tert-Butyldiphenylsilyl)oxy>methyl>-2,2-dimethyl-5-nitro-1,3-dioxane
• 英文别名: tert-butyl-[(2,2-dimethyl-5-nitro-1,3-dioxan-5-yl)methoxy]-diphenylsilane
• CAS: 138435-94-6
• 化学式: C₂₃H₃₁NO₅Si
• 分子量: 429.588
• InChiKey: WTIIIIARGPXZER-UHFFFAOYSA-N

物化性质

• 沸点：
  482.1±45.0 °C(Predicted)
• 密度：
  1.13±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.36
• 重原子数：
  30.0
• 可旋转键数：
  6.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.48
• 拓扑面积：
  70.83
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  5-<<(tert-Butyldiphenylsilyl)oxy>methyl>-2,2-dimethyl-5-nitro-1,3-dioxane 在 4-二甲氨基吡啶 、 偶氮二异丁腈 、 三正丁基氢锡 、 对甲苯磺酸 、 三乙胺 作用下， 以 甲醇 、 二氯甲烷 、 苯 为溶剂， 反应 7.0h， 生成 3-Acetoxy-2-(acetoxymethyl)-1-<(tert-butyldiphenylsilyl)oxy>propane
  参考文献：
  名称：

  Chemoenzymic preparation of asymmetrized tris(hydroxymethyl)methane (THYM*) and of asymmetrized bis(hydroxymethyl)acetaldehyde (BHYMA*) as new highly versatile chiral building blocks

  摘要：

  A series of asymmetrized tris(hydroxymethyl)methanes 2 and bis(hydroxymethyl)acetaldehydes 3 have been prepared in both enantiomeric forms through a chemoenzymatic methodology. The key step is the highly enantioselective PPL-catalyzed monohydrolysis of 2(E)-alkenyl-1,3-diacetoxypropanes 25-27. A careful study on the effect of unsaturations adjacent to the prochiral center in a series of 2-substituted 1,3-diacetoxypropanes has confirmed the suggested beneficial effect of a pi-system in that position but has also unveiled an unprecedented dramatic effect of double-bond configuration on enantioselectivity. A new empirical model for the interpretation of these and other results, based both on polarity and steric arguments, is proposed. This study provides a general protocol for the efficient synthesis of asymmetrized 1,3-propanediols bearing in position 2 saturated or unsaturated carbon chains.

  DOI：

  10.1021/jo00031a039
• 作为产物：
  描述：

  2,2-dimethyl-5-hydroxymethyl-5-nitro-1,3-dioxane 、 叔丁基二苯基氯硅烷 在 咪唑 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 72.0h， 生成 5-<<(tert-Butyldiphenylsilyl)oxy>methyl>-2,2-dimethyl-5-nitro-1,3-dioxane
  参考文献：
  名称：

  Chemoenzymic preparation of asymmetrized tris(hydroxymethyl)methane (THYM*) and of asymmetrized bis(hydroxymethyl)acetaldehyde (BHYMA*) as new highly versatile chiral building blocks

  摘要：

  A series of asymmetrized tris(hydroxymethyl)methanes 2 and bis(hydroxymethyl)acetaldehydes 3 have been prepared in both enantiomeric forms through a chemoenzymatic methodology. The key step is the highly enantioselective PPL-catalyzed monohydrolysis of 2(E)-alkenyl-1,3-diacetoxypropanes 25-27. A careful study on the effect of unsaturations adjacent to the prochiral center in a series of 2-substituted 1,3-diacetoxypropanes has confirmed the suggested beneficial effect of a pi-system in that position but has also unveiled an unprecedented dramatic effect of double-bond configuration on enantioselectivity. A new empirical model for the interpretation of these and other results, based both on polarity and steric arguments, is proposed. This study provides a general protocol for the efficient synthesis of asymmetrized 1,3-propanediols bearing in position 2 saturated or unsaturated carbon chains.

  DOI：

  10.1021/jo00031a039