(6S)-6,8-bis-(tert-butyldimethylsilanyloxy)-2,6-dimethyl-oct-2-ene | 1326774-94-0

• 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: (6S)-6,8-bis-(tert-butyldimethylsilanyloxy)-2,6-dimethyl-oct-2-ene
• 英文别名: (6S)-6,8-bis-(tert-butyldimethylsilanyloxy)-2,6-dimethyloct-2-ene；tert-butyl-[(3S)-3-[tert-butyl(dimethyl)silyl]oxy-3,7-dimethyloct-6-enoxy]-dimethylsilane
• CAS: 1326774-94-0
• 化学式: C₂₂H₄₈O₂Si₂
• 分子量: 400.793
• InChiKey: CZKKCOGMBUCJHN-QFIPXVFZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.93
• 重原子数：
  26
• 可旋转键数：
  11
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.91
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (6S)-6,8-bis-(tert-butyldimethylsilanyloxy)-2,6-dimethyl-oct-2-ene 在 四溴化碳 、 四丁基氟化铵 、 对甲苯磺酸 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 80.0 ℃ 、540.01 kPa 条件下， 反应 28.75h， 生成 (S)-(+)-xanthoangelol J
  参考文献：
  名称：

  Total synthesis and assignment of the absolute stereochemistry of xanthoangelol J: development of a highly efficient method for Claisen–Schmidt condensation

  摘要：

  The first total synthesis of cancer chemopreventive terpenyl hydroxychalcone xanthoangelol J isolated from Angelica keiskei was accomplished with asymmetric epoxidation, aromatic C-alkylation and Claisen-Schmidt condensation via enol mode as key steps. The crucial Claisen-Schmidt condensation has been accomplished by a novel green method using KHSO4-SiO2 as a recyclable catalyst under microwave activation. The absolute configuration of the molecule was also determined. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.11.106
• 作为产物：
  描述：

  2,3-环氧-3,7-二甲基辛-6-烯醇 在 2,6-二甲基吡啶 、 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 12.0h， 生成 (6S)-6,8-bis-(tert-butyldimethylsilanyloxy)-2,6-dimethyl-oct-2-ene
  参考文献：
  名称：

  Total synthesis and assignment of the absolute stereochemistry of xanthoangelol J: development of a highly efficient method for Claisen–Schmidt condensation

  摘要：

  The first total synthesis of cancer chemopreventive terpenyl hydroxychalcone xanthoangelol J isolated from Angelica keiskei was accomplished with asymmetric epoxidation, aromatic C-alkylation and Claisen-Schmidt condensation via enol mode as key steps. The crucial Claisen-Schmidt condensation has been accomplished by a novel green method using KHSO4-SiO2 as a recyclable catalyst under microwave activation. The absolute configuration of the molecule was also determined. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2013.11.106

文献信息

• Enantioselective total synthesis and absolute configuration of the alleged structure of crassinervic acid
  作者：Jyotsna N. Chakor、Lucio Merlini、Sabrina Dallavalle

  DOI：10.1016/j.tet.2011.06.015

  日期：2011.8

  An enantioselective synthesis of the structure reported for the natural antifungal compound, (−)-crassinervic acid (1), has been achieved starting from geraniol and p-hydroxybenzoic acid. The key chirality-inducing step is a Sharpless asymmetric epoxidation of an allylic alcohol, on the basis of which the S configuration can be assigned to the (−) natural enantiomer. The discrepancies between the spectroscopic

  从香叶醇和对羟基苯甲酸开始，已经实现了报道的天然抗真菌化合物（-）-crassinervic acid（1）的结构的对映选择性合成。关键的手性诱导步骤是烯丙醇的Sharpless不对称环氧化，在此基础上，S构型可分配给（-）天然对映体。合成的和天然的尼古丁酸的光谱数据之间的差异使人们对分配给天然化合物的结构产生了怀疑。讨论了可能的修订结构。