(3aR,5R,6R,6aR)-5-<2-(tert-butyldimethylsiloxy)ethyl>-tetrahydro-6-<<(1R,2R,4R)-2-hydroxy-7,7-dimethylbicyclo<2.2.1>hept-1-yl>ethynyl>-2,2-dimethylfuro<2,3-d>-1,3-dioxol-6-ol | 220325-37-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (3aR,5R,6R,6aR)-5-<2-(tert-butyldimethylsiloxy)ethyl>-tetrahydro-6-<<(1R,2R,4R)-2-hydroxy-7,7-dimethylbicyclo<2.2.1>hept-1-yl>ethynyl>-2,2-dimethylfuro<2,3-d>-1,3-dioxol-6-ol
• 英文别名: (3aR,5R,6R,6aR)-5-[2-[tert-butyl(dimethyl)silyl]oxyethyl]-6-[2-[(1R,2R,4R)-2-hydroxy-7,7-dimethyl-1-bicyclo[2.2.1]heptanyl]ethynyl]-2,2-dimethyl-5,6a-dihydro-3aH-furo[2,3-d][1,3]dioxol-6-ol
• CAS: 220325-37-1
• 化学式: C₂₆H₄₄O₆Si
• 分子量: 480.717
• InChiKey: YHVIQWIXQVQEAI-HKRAICSPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.2
• 重原子数：
  33
• 可旋转键数：
  7
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  77.4
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  (3aR,5R,6R,6aR)-5-<2-(tert-butyldimethylsiloxy)ethyl>-tetrahydro-6-<<(1R,2R,4R)-2-hydroxy-7,7-dimethylbicyclo<2.2.1>hept-1-yl>ethynyl>-2,2-dimethylfuro<2,3-d>-1,3-dioxol-6-ol 在 咪唑 、 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 4.0h， 生成 (3aR,5R,6R,6aR)-5-<2-(tert-butyldimethylsilyloxy)ethyl>-tetrahydro-6-<(E)-2-<(1S,2R,4R)-2-hydroxy-7,7-dimethylbicyclo<2.2.1>hept-1-yl>vinyl>-2,2-dimethylfuro<2,3-d>-1,3-dioxol-6-ol
  参考文献：
  名称：

  Reversible Charge-Accelerated Oxy-Cope Rearrangements

  摘要：

  An asymmetric synthesis of the oxetane-containing norbornanone 23 and its coupling to trans-1-propenyllithium to give 24 are reported, in tandem with the preparation of the related alcohols 28 and 30. All three divinyl carbinols undergo anionic oxy-Cope rearrangement very rapidly at low temperature. Quenching of 24(-)K(+) and 28(-)K(+) under these conditions with water or various aqueous salt solutions results in protonation of the alkoxides. If these reaction mixtures are poured instead onto cold (0 degrees C) silica gel, their sigmatropically related ketones are isolated in very good yield. Whereas the 24(-)K(+) <--(-->) 25(-)K(+) equilibrium pair is not reactive to molecular oxygen, 30(-)K(+) is directly converted into an a-hydroperoxy ketone under comparable conditions. These and additional observations are rationalized in the context of atropisomerism involving conversion of oxygen-up enolates, formed reversibly under kinetically controlled conditions, into their thermodynamically favored, more reactive oxygen-down conformers.

  DOI：

  10.1021/jo982002w
• 作为产物：
  描述：

  5,6-dideoxy-1,2-O-isopropylidene-α-D-xylo-hex-5-eno-furanose 在 咪唑 、 sodium hydroxide 、 正丁基锂 、 硼烷四氢呋喃络合物 、 2-甲基-2-丁烯 、 双氧水 、 戴斯-马丁氧化剂 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 6.0h， 生成 (3aR,5R,6R,6aR)-5-<2-(tert-butyldimethylsiloxy)ethyl>-tetrahydro-6-<<(1R,2R,4R)-2-hydroxy-7,7-dimethylbicyclo<2.2.1>hept-1-yl>ethynyl>-2,2-dimethylfuro<2,3-d>-1,3-dioxol-6-ol
  参考文献：
  名称：

  Reversible Charge-Accelerated Oxy-Cope Rearrangements

  摘要：

  An asymmetric synthesis of the oxetane-containing norbornanone 23 and its coupling to trans-1-propenyllithium to give 24 are reported, in tandem with the preparation of the related alcohols 28 and 30. All three divinyl carbinols undergo anionic oxy-Cope rearrangement very rapidly at low temperature. Quenching of 24(-)K(+) and 28(-)K(+) under these conditions with water or various aqueous salt solutions results in protonation of the alkoxides. If these reaction mixtures are poured instead onto cold (0 degrees C) silica gel, their sigmatropically related ketones are isolated in very good yield. Whereas the 24(-)K(+) <--(-->) 25(-)K(+) equilibrium pair is not reactive to molecular oxygen, 30(-)K(+) is directly converted into an a-hydroperoxy ketone under comparable conditions. These and additional observations are rationalized in the context of atropisomerism involving conversion of oxygen-up enolates, formed reversibly under kinetically controlled conditions, into their thermodynamically favored, more reactive oxygen-down conformers.

  DOI：

  10.1021/jo982002w