[(1R)-4-[(1S,3S,6S,8R,11R,14S)-14-bromo-1,8,13,13-tetramethyl-2,7,12-trioxatricyclo[9.5.0.03,8]hexadecan-6-yl]-1-[(2S,5S)-2-methyl-5-(2-triethylsilyloxypropan-2-yl)oxolan-2-yl]pent-4-enoxy]-triethylsilane | 1186199-63-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: [(1R)-4-[(1S,3S,6S,8R,11R,14S)-14-bromo-1,8,13,13-tetramethyl-2,7,12-trioxatricyclo[9.5.0.03,8]hexadecan-6-yl]-1-[(2S,5S)-2-methyl-5-(2-triethylsilyloxypropan-2-yl)oxolan-2-yl]pent-4-enoxy]-triethylsilane
• CAS: 1186199-63-2
• 化学式: C₄₂H₇₉BrO₆Si₂
• 分子量: 816.161
• InChiKey: ZSHJWBHBIFMNEK-CONKYBCZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  12.05
• 重原子数：
  51
• 可旋转键数：
  16
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.95
• 拓扑面积：
  55.4
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  [(1R)-4-[(1S,3S,6S,8R,11R,14S)-14-bromo-1,8,13,13-tetramethyl-2,7,12-trioxatricyclo[9.5.0.03,8]hexadecan-6-yl]-1-[(2S,5S)-2-methyl-5-(2-triethylsilyloxypropan-2-yl)oxolan-2-yl]pent-4-enoxy]-triethylsilane 在 四丁基氟化铵 作用下， 以 四氢呋喃 为溶剂， 以83%的产率得到(1R)-4-[(1S,3S,6S,8R,11R,14S)-14-bromo-1,8,13,13-tetramethyl-2,7,12-trioxatricyclo[9.5.0.03,8]hexadecan-6-yl]-1-[(2S,5S)-5-(2-hydroxypropan-2-yl)-2-methyloxolan-2-yl]pent-4-en-1-ol
  参考文献：
  名称：

  Total syntheses of the squalene-derived halogenated polyethers ent -dioxepandehydrothyrsiferol and armatol A via bromonium- and Lewis acid-initiated epoxide-opening cascades

  摘要：

  Herein we describe in full our investigations leading to the first total syntheses of ent-dioxepandehydrothyrsiferol and armatol A. Discovery of a bromonium-initiated epoxide-opening cascade enabled novel tactics for constructing key fragments found in both natural products and have led us to revise the proposed biogeneses. Other common features found in the routes include convergent fragment coupling strategies to assemble the natural products' backbones and the use of epoxide-opening cascades for rapid constructions of the fused polyether subunits. Through de novo synthesis of armatol A, we elucidate the absolute and relative configuration of this natural product. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.04.041
• 作为产物：
  描述：

  {(2S,3S)-3-[2-((R)-3,3-Dimethyl-oxiranyl)-ethyl]-3-methyl-oxiranyl}-methanol 在 咪唑 、 (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride 、 正丁基锂 、 caesium carbonate 、 sodium hydroxide 作用下， 以 四氢呋喃 、 正己烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 19.67h， 生成 [(1R)-4-[(1S,3S,6S,8R,11R,14S)-14-bromo-1,8,13,13-tetramethyl-2,7,12-trioxatricyclo[9.5.0.03,8]hexadecan-6-yl]-1-[(2S,5S)-2-methyl-5-(2-triethylsilyloxypropan-2-yl)oxolan-2-yl]pent-4-enoxy]-triethylsilane
  参考文献：
  名称：

  Total syntheses of the squalene-derived halogenated polyethers ent -dioxepandehydrothyrsiferol and armatol A via bromonium- and Lewis acid-initiated epoxide-opening cascades

  摘要：

  Herein we describe in full our investigations leading to the first total syntheses of ent-dioxepandehydrothyrsiferol and armatol A. Discovery of a bromonium-initiated epoxide-opening cascade enabled novel tactics for constructing key fragments found in both natural products and have led us to revise the proposed biogeneses. Other common features found in the routes include convergent fragment coupling strategies to assemble the natural products' backbones and the use of epoxide-opening cascades for rapid constructions of the fused polyether subunits. Through de novo synthesis of armatol A, we elucidate the absolute and relative configuration of this natural product. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.04.041

文献信息

• Total Synthesis of <i>ent</i>-Dioxepandehydrothyrsiferol via a Bromonium-Initiated Epoxide-Opening Cascade
  作者：Jessica Tanuwidjaja、Sze-Sze Ng、Timothy F. Jamison

  DOI：10.1021/ja9052366

  日期：2009.9.2

  In the first total synthesis of ent-dioxepandehydrothyrsiferol, the signature trans-anti-trans 7,7,6-fused tricyclic polyether framework was constructed in a single bromonium-initiated epoxide-opening cascade that incorporates both endo- and exo-selective epoxide openings, each directed by the substitution pattern of the epoxide (methyl groups). This study thus demonstrates the feasibility of a possible

  在 ent-dioxepandehydrothyrsiferol 的第一次全合成中，标志性的 trans-anti-trans 7,7,6-稠合三环聚醚框架构建在单个溴引发的环氧化物开环级联中，该级联反应结合了内选择性和外选择性环氧化物开口，每个都由环氧化物（甲基）的取代模式指导。因此，这项研究证明了可能的生物发生的可行性。