1-((tert-butyldiphenylsilyl)oxy)-4-methyl-3-((n-butylthio)methylidene)cyclohex-4-ene

• 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: 1-((tert-butyldiphenylsilyl)oxy)-4-methyl-3-((n-butylthio)methylidene)cyclohex-4-ene
• 英文别名: 1-[(tert-butyldiphenylsilyl)oxy]-4-methyl-3-[(n-butylthio)methylidene]cyclohex-4-ene；tert-butyl-[(5E)-5-(butylsulfanylmethylidene)-4-methylcyclohex-3-en-1-yl]oxy-diphenylsilane
• 化学式: C₂₈H₃₈OSSi
• 分子量: 450.761
• InChiKey: XISWGDPEGJHTAA-ZNTNEXAZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.09
• 重原子数：
  31
• 可旋转键数：
  9
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  34.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  1-((tert-butyldiphenylsilyl)oxy)-4-methyl-3-((n-butylthio)methylidene)cyclohex-4-ene 在 正丁基锂 、 四丁基氟化铵 、 三苯基膦 、 mercury dichloride 、 锌 作用下， 以 四氢呋喃 、 乙醚 、 正己烷 、 二氯甲烷 、 水 、 乙腈 为溶剂， 反应 11.17h， 生成 (S)-1-Ethynyl-5-hydroxy-2-methyl-1-cyclohexene
  参考文献：
  名称：

  Studies of vitamin D (calciferol) and its analogs. 44. Thermal [1,7]-sigmatropic shift of previtamin D3 to vitamin D3: synthesis and study of pentadeuterio derivatives

  摘要：

  Specifically pentadeuteriated previtamin D3 11 has been synthesized to impart thermal stability to the otherwise labile material. A 12-step synthesis of the trideuteriated A-ring 14b from p-methoxyphenol was developed and employed the addition of (methyl-d3)magnesium iodide to either the keto thiomethylene intermediate 23 or the keto dioxane 27. The enantiomerically pure trideuterio A-ring (-)-14b was then coupled with the deuteriated CD fragment 13b followed by hydrogenation to afford pentadeuteriated previtamin D3 11. A primary deuterium kinetic isotope effect (KIE) study of the [1,7]-sigmatropic hydrogen migration in the conversion of previtamin D3 to vitamin D3 indicated a more ''normal'' primary deuterium isotope effect (as compared to a previously reported literature value of approximately 45). At 80-degrees-C, a k(H)/k(D) for the previtamin D3 to vitamin D3 isomerization was determined to be approximately 6.2. At 25-degrees-C, this [1,7]-sigmatropic hydrogen migration proceeds with a k(H)/k(D) Of approximately 11.4. The reversible, first-order [1,7]-sigmatropic hydrogen shift of previtamin D3 to D3, determined over the temperature range 60.1-85.5-degrees-C is characterized by the following activation parameters: log A(H) = 8.8 and E(a)H = 19.6 kcal/mol. Deuteriated pre-D3, which rearranges over this temperature range, is characterized by the activation parameters log A(D) = 9.5 and E(a)D = 21.9 kcal/mol.

  DOI：

  10.1021/jo00055a011
• 作为产物：
  描述：

  4-[[(1,1-二甲基乙基)二苯基甲硅烷基]氧基]-环己酮 在 sodium hydride 、 magnesium sulfate 、 对甲苯磺酸 作用下， 以 乙醚 、 paraffin 、 苯 为溶剂， 反应 5.5h， 生成 1-((tert-butyldiphenylsilyl)oxy)-4-methyl-3-((n-butylthio)methylidene)cyclohex-4-ene
  参考文献：
  名称：

  Studies of vitamin D (calciferol) and its analogs. 44. Thermal [1,7]-sigmatropic shift of previtamin D3 to vitamin D3: synthesis and study of pentadeuterio derivatives

  摘要：

  Specifically pentadeuteriated previtamin D3 11 has been synthesized to impart thermal stability to the otherwise labile material. A 12-step synthesis of the trideuteriated A-ring 14b from p-methoxyphenol was developed and employed the addition of (methyl-d3)magnesium iodide to either the keto thiomethylene intermediate 23 or the keto dioxane 27. The enantiomerically pure trideuterio A-ring (-)-14b was then coupled with the deuteriated CD fragment 13b followed by hydrogenation to afford pentadeuteriated previtamin D3 11. A primary deuterium kinetic isotope effect (KIE) study of the [1,7]-sigmatropic hydrogen migration in the conversion of previtamin D3 to vitamin D3 indicated a more ''normal'' primary deuterium isotope effect (as compared to a previously reported literature value of approximately 45). At 80-degrees-C, a k(H)/k(D) for the previtamin D3 to vitamin D3 isomerization was determined to be approximately 6.2. At 25-degrees-C, this [1,7]-sigmatropic hydrogen migration proceeds with a k(H)/k(D) Of approximately 11.4. The reversible, first-order [1,7]-sigmatropic hydrogen shift of previtamin D3 to D3, determined over the temperature range 60.1-85.5-degrees-C is characterized by the following activation parameters: log A(H) = 8.8 and E(a)H = 19.6 kcal/mol. Deuteriated pre-D3, which rearranges over this temperature range, is characterized by the activation parameters log A(D) = 9.5 and E(a)D = 21.9 kcal/mol.

  DOI：

  10.1021/jo00055a011

文献信息

• Studies of vitamin D (calciferol) and its analogs. 44. Thermal [1,7]-sigmatropic shift of previtamin D3 to vitamin D3: synthesis and study of pentadeuterio derivatives
  作者：William H. Okamura、Hassan Y. Elnagar、Michael Ruther、Susanne Dobreff

  DOI：10.1021/jo00055a011

  日期：1993.1

  Specifically pentadeuteriated previtamin D3 11 has been synthesized to impart thermal stability to the otherwise labile material. A 12-step synthesis of the trideuteriated A-ring 14b from p-methoxyphenol was developed and employed the addition of (methyl-d3)magnesium iodide to either the keto thiomethylene intermediate 23 or the keto dioxane 27. The enantiomerically pure trideuterio A-ring (-)-14b was then coupled with the deuteriated CD fragment 13b followed by hydrogenation to afford pentadeuteriated previtamin D3 11. A primary deuterium kinetic isotope effect (KIE) study of the [1,7]-sigmatropic hydrogen migration in the conversion of previtamin D3 to vitamin D3 indicated a more ''normal'' primary deuterium isotope effect (as compared to a previously reported literature value of approximately 45). At 80-degrees-C, a k(H)/k(D) for the previtamin D3 to vitamin D3 isomerization was determined to be approximately 6.2. At 25-degrees-C, this [1,7]-sigmatropic hydrogen migration proceeds with a k(H)/k(D) Of approximately 11.4. The reversible, first-order [1,7]-sigmatropic hydrogen shift of previtamin D3 to D3, determined over the temperature range 60.1-85.5-degrees-C is characterized by the following activation parameters: log A(H) = 8.8 and E(a)H = 19.6 kcal/mol. Deuteriated pre-D3, which rearranges over this temperature range, is characterized by the activation parameters log A(D) = 9.5 and E(a)D = 21.9 kcal/mol.