(2E,6E)-2,6-Dimethyl-8-(2,3,4,5-tetramethoxy-6-methyl-phenyl)-octa-2,6-dien-1-ol | 94828-07-6

• 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: (2E,6E)-2,6-Dimethyl-8-(2,3,4,5-tetramethoxy-6-methyl-phenyl)-octa-2,6-dien-1-ol
• CAS: 94828-07-6
• 化学式: C₂₁H₃₂O₅
• 分子量: 364.482
• InChiKey: CSINQHQLHZQQBF-QYFSLLALSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.24
• 重原子数：
  26.0
• 可旋转键数：
  10.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  57.15
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为产物：
  描述：

  2,3,4,5-四甲氧基甲苯 在 盐酸 、 bis(triphenylphosphine)nickel(II) chloride 、 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 生成 (2E,6E)-2,6-Dimethyl-8-(2,3,4,5-tetramethoxy-6-methyl-phenyl)-octa-2,6-dien-1-ol
  参考文献：
  名称：

  A Convergent Approach to Coenzyme Q

  摘要：

  Syntheses of coenzyme Q(3-8) are described, as well as related systems such as plastoquinone-5. Preparation of thr higher homologues of the ubiquinones relies on two new conjunctive reagents, or "linchpins", each of which ultimately corresponds to two or three prenyl units. These allow for attachment of a polyprenyl halide at one end, followed by a Ni(0)-catalyzed cross-coupling at the other terminus with a chloromethylated p-quinone.

  DOI：

  10.1021/ja992164p

文献信息

• Synthetic studies on isoprenoidquinones. I. A facile regio- and sterecontrolled synthesis of protected hydroquinones with an omega-hydroxyprenyl or omega-hydroxygeranyl side chain.
  作者：YUKIO MASAKI、KINJI HASHIMOTO、KAZUHIKO SAKUMA、KENJI KAJI

  DOI：10.1248/cpb.32.3952

  日期：——

  Regio-and stereocontrolled terminal functionalization of protected 2-prenyl-and 2-geranylhydroquinones (2) was achieved by way of terminal methallylic sulfides (4), which were easily obtained via benzenesulfenyl chloride addition followed by dehydrochlorination or via allylic chlorination with SO2Cl2 followed by sulfenylation, leading to terminal trans-allylic alcohols (5) which are promising intermediates for the synthesis of polyisoprenoidquinones. In this transformation, interesting steric effects of the hydroquinone nucleus with the adjacent arylic methyl group influencing the site-selectivity in the reactions of the isoprenoid side chain were observed.

  保护的2-烯丙基和2-香叶烯基氢醌（2）的区域和立体选择性末端官能化通过末端美克烯基硫化物（4）实现，这些硫化物可通过苯基磺酰氯的加成反应后脱氯化获得，或者通过SO2Cl2的烯丙基氯化后进行亚砜化反应获得，最终转化为末端反式烯丙醇（5），这些化合物是合成聚异戊二烯酮的有前景的中间体。在这一转化过程中，观察到氢醌核与邻近芳基甲基团之间的有趣立体效应，这影响了异戊二烯侧链反应的位点选择性。