(R)-triethyl-(1,1,5-trimethyldec-9-ynyloxy)silane | 387834-46-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (R)-triethyl-(1,1,5-trimethyldec-9-ynyloxy)silane
• CAS: 387834-46-0
• 化学式: C₁₉H₃₈OSi
• 分子量: 310.596
• InChiKey: LWDSOWDWYSMMII-GOSISDBHSA-N

物化性质

• 沸点：
  347.5±25.0 °C(Predicted)
• 密度：
  0.842±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.4
• 重原子数：
  21.0
• 可旋转键数：
  12.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.89
• 拓扑面积：
  9.23
• 氢给体数：
  0.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  (R)-triethyl-(1,1,5-trimethyldec-9-ynyloxy)silane 在 (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、 氢氧化钾 、 四丁基氟化铵 、 二(3-甲基丁烷-2-基)硼烷 作用下， 以 四氢呋喃 为溶剂， 生成 <(1Z),(3S,5R)>-12-<3,5-dihydroxy-2-methylcyclohexylidene>-2,6-dimethyl-10-dodecaen-2-ol
  参考文献：
  名称：

  New Convergent Synthesis of 1α,25-Dihydroxyvitamin D₃ and Its Analogues by Suzuki−Miyaura Coupling between A-Ring and C,D-Ring Parts

  摘要：

  A new convergent method for the synthesis of 1alpha,25-dihydroxyvitamin D-3 and its analogues has been developed that involves efficient preparation of the A-ring part la, (Z)-(3S,5R)-1-bromomethylene-3,5-bis(tert-butyldimethylsilyloxy)-2-methylenecyclohexane, starting from epichlorohydrin (4) and its Suzuki-Miyaura coupling reaction with the C,D-ring part 12. Thus, (R)-4 was converted to (3S,5R)-5-(tert-butyldimethylsilyloxy)-8-(trimethylsilyl)-oct-1-en-7-yn-3-ol (3a) through a ten-step reaction sequence in 49% overall yield. Compound 3a thus obtained was treated with a Ti(O-i-Pr)(4)/2 i-PrMgCl reagent and then with NBS to afford (Z)-(1S,2S,5R)-2-bromomethyl-3-[bromo(trimethylsilyl)methylene]-5-(tert-butyldimethylsilyloxy)cyclohexanol (10a) in 51% yield, from which la was obtained in 87% yield by sequential treatment with TBSCl/imidazole, DBU, and Cs2CO3. The resulting A-ring intermediate la was reacted with alkenylboronate 12 in the presence of a PdCl2(dppf) catalyst to furnish 1alpha,25-dihydroxyvitamin D-3 in 82% yield after protodesilylation. Similarly, all of the other three possible stereoisomers of A-ring parts 1b, 1c, and 1d were prepared, from which 1-epi-, 3-epi-, and 1,3-di-epi-1alpha,25-dihydroxyvitamin D-3 were synthesized by coupling with 12 in excellent yield, respectively. Starting from la and 1c, des-C,D-I(x,25-dihydroxyvitamin D-3 analogues, retiferol 13 and its 3-epi derivative, were also prepared, respectively.

  DOI：

  10.1021/jo0353435
• 作为产物：
  描述：

  (S)-(-)-β-香茅醇 在 咪唑 、 magnesium 、 甲基磺酰氯 、 三乙胺 、 间氯过氧苯甲酸 作用下， 以 四氢呋喃 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 生成 (R)-triethyl-(1,1,5-trimethyldec-9-ynyloxy)silane
  参考文献：
  名称：

  Novel Synthetic Approach to 19-nor-1α,25-Dihydroxyvitamin D₃ and Its Derivatives by Suzuki−Miyaura Coupling in Solution and on Solid Support

  摘要：

  [GRAPHICS]19-nor-1 alpha ,25-Dihydroxyvitamin D-3 was synthesized by the Suzuki-Miyaura coupling of the A-ring intermediate 3, which was efficiently prepared from readily available 5-(tert butyldimethylsilyl)oxycyclohex-2-enone (5), with the boronate compound of the C,D-ring portion. The method could be applied to a solid-phase synthesis to prepare the des-C,D derivatives of 19-nor-1 alpha ,25-dihydroxyvitamin D-3.

  DOI：

  10.1021/ol016908r