| 1355629-86-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• CAS: 1355629-86-5
• 化学式: C₂₄H₄₂O₆Si
• 分子量: 454.679
• InChiKey: IUFSJGRBEGNYKS-PQNFWZFPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.58
• 重原子数：
  31.0
• 可旋转键数：
  4.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.92
• 拓扑面积：
  55.38
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  在 咪唑 、 Grubbs catalyst first generation 、 四丙基高钌酸铵 、 palladium 10% on activated carbon 、 camphor-10-sulfonic acid 、 四丁基氟化铵 、 氢气 、 palladium diacetate 、 potassium hydride 、 N-甲基吗啉氧化物 、 三乙胺 、 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 、 氯仿 、 乙酸乙酯 、 N,N-二甲基甲酰胺 、 甲苯 、 乙腈 、 mineral oil 为溶剂， 反应 16.75h， 生成 C₂₀H₃₂O₆
  参考文献：
  名称：

  Design and Synthesis of Skeletal Analogues of Gambierol: Attenuation of Amyloid-β and Tau Pathology with Voltage-Gated Potassium Channel and N-Methyl-d-aspartate Receptor Implications

  摘要：

  Gambierol is a potent neurotoxin that belongs to the family of marine polycyclic ether natural products and primarily targets voltage-gated potassium channels (K-v channels) in excitable membranes. Previous work in the chemistry of marine polycyclic ethers has suggested the critical importance of the full length of polycyclic ether skeleton for potent biological activity. Although we have previously investigated structure-activity relationships (SARs) of the peripheral functionalities of gambierol, it remained unclear whether the whole polycyclic ether skeleton is needed for its cellular activity. In this work, we designed and synthesized two truncated skeletal analogues of gambierol comprising the EFGH- and BCDEFGH-rings of the parent compound, both of which surprisingly showed similar potency to gambierol on voltage gated potassium channels (K-v) inhibition. Moreover, we examined the effect of these compounds in an in vitro model of Alzheimer's disease (AD) obtained from triple transgenic (3xTg-AD) mice, which expresses amyloid beta (A beta) accumulation and tau hyperphosphorylation. In vitro preincubation of the cells with the compounds resulted in significant inhibition of K+ currents, a reduction in the extra- and intracellular levels of A beta, and a decrease in the levels of hyperphosphorylated tau. In addition, pretreatment with these compounds reduced the steady-state level of the N-methyl-D-aspartate (NMDA) receptor subunit 2A without affecting the 2B subunit. The involvement of glutamate receptors was further suggested by the blockage of the effect of gambierol on tau hyperphosphorylation by glutamate receptor antagonists. The present study constitutes the first discovery of skeletally simplified, designed polycyclic ethers with potent cellular activity and demonstrates the utility of gambierol and its synthetic analogues as chemical probes for understanding the function of K-v channels as well as the molecular mechanism of A beta metabolism modulated by NMDA receptors.

  DOI：

  10.1021/ja300565t
• 作为产物：
  描述：

  甲基三苯基溴化膦 、 ((4aR,5aS,6aR,8S,9R,10aS,11aR,13aS)-2,2,9,10a-Tetramethyl-9-trimethylsilanyloxy-dodecahydro-1,3,5,7,11-pentaoxa-benzo[4,5]cyclohepta[1,2-b]naphthalen-8-yl)-acetaldehyde 在 sodium hexamethyldisilazane 作用下， 以 四氢呋喃 为溶剂， 反应 0.83h， 以1.18 g的产率得到
  参考文献：
  名称：

  Design and Synthesis of Skeletal Analogues of Gambierol: Attenuation of Amyloid-β and Tau Pathology with Voltage-Gated Potassium Channel and N-Methyl-d-aspartate Receptor Implications

  摘要：

  Gambierol is a potent neurotoxin that belongs to the family of marine polycyclic ether natural products and primarily targets voltage-gated potassium channels (K-v channels) in excitable membranes. Previous work in the chemistry of marine polycyclic ethers has suggested the critical importance of the full length of polycyclic ether skeleton for potent biological activity. Although we have previously investigated structure-activity relationships (SARs) of the peripheral functionalities of gambierol, it remained unclear whether the whole polycyclic ether skeleton is needed for its cellular activity. In this work, we designed and synthesized two truncated skeletal analogues of gambierol comprising the EFGH- and BCDEFGH-rings of the parent compound, both of which surprisingly showed similar potency to gambierol on voltage gated potassium channels (K-v) inhibition. Moreover, we examined the effect of these compounds in an in vitro model of Alzheimer's disease (AD) obtained from triple transgenic (3xTg-AD) mice, which expresses amyloid beta (A beta) accumulation and tau hyperphosphorylation. In vitro preincubation of the cells with the compounds resulted in significant inhibition of K+ currents, a reduction in the extra- and intracellular levels of A beta, and a decrease in the levels of hyperphosphorylated tau. In addition, pretreatment with these compounds reduced the steady-state level of the N-methyl-D-aspartate (NMDA) receptor subunit 2A without affecting the 2B subunit. The involvement of glutamate receptors was further suggested by the blockage of the effect of gambierol on tau hyperphosphorylation by glutamate receptor antagonists. The present study constitutes the first discovery of skeletally simplified, designed polycyclic ethers with potent cellular activity and demonstrates the utility of gambierol and its synthetic analogues as chemical probes for understanding the function of K-v channels as well as the molecular mechanism of A beta metabolism modulated by NMDA receptors.

  DOI：

  10.1021/ja300565t

文献信息

• Diastereoselective Ring-Closing Metathesis as a Means to Construct Medium-Sized Cyclic Ethers: Application to the Synthesis of a Photoactivatable Gambierol Derivative
  作者：Yu Onodera、Kazuaki Hirota、Yuto Suga、Keiichi Konoki、Mari Yotsu-Yamashita、Makoto Sasaki、Haruhiko Fuwa

  DOI：10.1021/acs.joc.6b01302

  日期：2016.9.16

  describes a concise synthesis of six- to eight-membered α,α′-substituted cyclic ethers by exploiting diastereoselective ring-closing metathesis (RCM) of 1,4-pentadien-3-yl ether derivatives. The RCM precursors could be efficiently prepared via a vinylation of the corresponding α-acetoxy ether derivatives using divinylzinc. Diastereoselective RCM of 1,4-pentadien-3-yl ether derivatives afforded a series

  本文介绍了通过利用1,4-戊二烯-3-基醚衍生物的非对映选择性闭环复分解（RCM）合成六至八元的α，α'-取代的环醚的方法。可以使用二乙烯基锌通过相应的α-乙酰氧基醚衍生物的乙烯基化来有效地制备RCM前体。1,4-戊二烯-3-基醚衍生物的非对映选择性RCM提供一系列具有中等至良好非对映选择性的六至八元α，α'-取代的环状醚。非对映选择性RCM的立体化学结果似乎取决于所锻造的环的结构。六元和七元环醚的非对映选择性似乎在很大程度上受动力学控制，而与催化剂的反应性无关，而八元环醚的催化活性可以控制。最后，将非对映选择性RCM化学方法用于合成生物素标记的甘比罗尔可光活化衍生物。