(Z)-(4R,5R)-2,4-Dimethyl-5-triethylsilanyloxy-oct-2-en-1-ol | 169944-50-7

• 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: (Z)-(4R,5R)-2,4-Dimethyl-5-triethylsilanyloxy-oct-2-en-1-ol
• 英文别名: (Z,4R,5R)-2,4-dimethyl-5-triethylsilyloxyoct-2-en-1-ol
• CAS: 169944-50-7
• 化学式: C₁₆H₃₄O₂Si
• 分子量: 286.53
• InChiKey: QJHOVNPSATVPPK-CZZMSJKLSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.75
• 重原子数：
  19
• 可旋转键数：
  10
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.88
• 拓扑面积：
  29.5
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (Z)-(4R,5R)-2,4-Dimethyl-5-triethylsilanyloxy-oct-2-en-1-ol 在 4-二甲氨基吡啶 、 dipotassium hydrogenphosphate 、 三甲基铝 、 三乙基硅基三氟甲磺酸酯 、 N,N-二异丙基乙胺 、 间氯过氧苯甲酸 作用下， 以 二氯甲烷 为溶剂， 反应 6.25h， 生成 (2S,3S,4S,5R)-2,4-Dimethyl-5-propyl-3-triethylsilanyloxy-2-triethylsilanyloxymethyl-tetrahydro-furan
  参考文献：
  名称：

  Stereospecific Formation of Optically Active 5-Alkyl-4-methyl-3-[(trialkylsilyl)oxy]-2-([(trialkylsilyl)oxy]- methyl)tetrahydrofurans via Diastereoselective Epoxidation and Rearrangement of 5-[(Trialkylsilyl)oxy]-2-alken-1-ols¹

  摘要：

  A novel method for the synthesis of a series of silyl ethers of 3-(silyloxy)tetrahydrofuran-2-methanols bearing substituents at all four carbon atoms of the ring has been developed. The process involves first non-aldol aldol reaction of the epoxy silyl ether 8 to give the anti aldol product 9, stereoselective olefination and reduction to the (E)- and (Z)-allylic alcohols 10 and 11, diastereoselective epoxidation of these alcohols to give any of the four diastereomeric epoxy alcohols 12-15, silylation of the alcohols to give the epoxy silyl ethers 27-30, and final Lewis acid catalyzed rearrangement of the epoxy silyl ethers to give the desired products 31-33 and 36. In the first three instances, good yields of the desired 3-(silyloxy)-2-((silyloxy)methyl)tetrahydrofurans were obtained. However, rearrangement of the epoxy silyl ether 27 gave a mixture of products, the bis-silyl ether 36 as well as the products of a second non-aldol aldol process. This hydride migration to give the 3,5-bis((trialkylsilyl)oxy)-2,4-dimethylalkanal 35 or its internally protected 1-(silyloxy)pyran 38 can be made to occur in good yield.

  DOI：

  10.1021/ja972507o
• 作为产物：
  描述：

  (2S,3R)-3-(Triethylsilyloxy)-2-methylhexanal 在 18-冠醚-6 、 双(三甲基硅烷基)氨基钾 、 红铝 作用下， 以 四氢呋喃 、 甲苯 为溶剂， 反应 19.0h， 生成 (Z)-(4R,5R)-2,4-Dimethyl-5-triethylsilanyloxy-oct-2-en-1-ol
  参考文献：
  名称：

  Stereospecific Formation of Optically Active 5-Alkyl-4-methyl-3-[(trialkylsilyl)oxy]-2-([(trialkylsilyl)oxy]- methyl)tetrahydrofurans via Diastereoselective Epoxidation and Rearrangement of 5-[(Trialkylsilyl)oxy]-2-alken-1-ols¹

  摘要：

  A novel method for the synthesis of a series of silyl ethers of 3-(silyloxy)tetrahydrofuran-2-methanols bearing substituents at all four carbon atoms of the ring has been developed. The process involves first non-aldol aldol reaction of the epoxy silyl ether 8 to give the anti aldol product 9, stereoselective olefination and reduction to the (E)- and (Z)-allylic alcohols 10 and 11, diastereoselective epoxidation of these alcohols to give any of the four diastereomeric epoxy alcohols 12-15, silylation of the alcohols to give the epoxy silyl ethers 27-30, and final Lewis acid catalyzed rearrangement of the epoxy silyl ethers to give the desired products 31-33 and 36. In the first three instances, good yields of the desired 3-(silyloxy)-2-((silyloxy)methyl)tetrahydrofurans were obtained. However, rearrangement of the epoxy silyl ether 27 gave a mixture of products, the bis-silyl ether 36 as well as the products of a second non-aldol aldol process. This hydride migration to give the 3,5-bis((trialkylsilyl)oxy)-2,4-dimethylalkanal 35 or its internally protected 1-(silyloxy)pyran 38 can be made to occur in good yield.

  DOI：

  10.1021/ja972507o