2-(苄氧基)-1-溴-3,4-二甲氧基苯 | 1335227-07-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: 2-(苄氧基)-1-溴-3,4-二甲氧基苯
• 英文名称: 2-(benzyloxy)-1-bromo-3,4-dimethoxybenzene
• 英文别名: 1-bromo-3,4-dimethoxy-2-phenylmethoxybenzene
• CAS: 1335227-07-0
• 化学式: C₁₅H₁₅BrO₃
• 分子量: 323.186
• InChiKey: MYQDKDACGITGBK-UHFFFAOYSA-N

物化性质

• 熔点：
  68-70 °C
• 沸点：
  382.5±37.0 °C(Predicted)
• 密度：
  1.356±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  19
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  27.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-(苄氧基)-1-溴-3,4-二甲氧基苯 在 N-甲基二环己基胺 、 碘 、 silver trifluoroacetate 、 对甲苯磺酸 、 bis(dibenzylideneacetone)-palladium⁽⁰⁾ 、 lithium diisopropyl amide 、 2-二叔丁基膦-1-苯基吲哚 作用下， 以 四氢呋喃 、 氯仿 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 生成
  参考文献：
  名称：

  Synthesis, Stereochemical Analysis, and Derivatization of Myricanol Provide New Probes That Promote Autophagic Tau Clearance

  摘要：

  We previously discovered that one specific scalemic preparation of myricanol (1), a constituent of Myrica cerifera (bayberry/southern wax myrtle) root bark, could lower the levels of the microtubule-associated protein tau (MAPT). The significance is that tau accumulates in a number of neurodegenerative diseases, the most common being Alzheimers disease (AD). Herein, a new synthetic route to prepare myricanol using a suitable boronic acid pinacol ester intermediate is reported. An X-ray crystal structure of the isolated myricanol (1) was obtained and showed a co-crystal consisting of (+)-aR,11S-myricanol (2) and (-)-aS,11R-myricanol (3) coformers. Surprisingly, 3, obtained from chiral separation from 1, reduced tau levels in both cultured cells and ex vivo brain slices from a mouse model of tauopathy at reasonable mid-to-low micromolar potency, whereas 2 did not. SILAC proteomics and cell assays revealed that 3 promoted tau degradation through an autophagic mechanism, which was in contrast to that of other tau-lowering compounds previously identified by our group. During the course of structureactivity relationship (SAR) development, we prepared compound 13 by acid-catalyzed dehydration of 1. 13 had undergone an unexpected structural rearrangement through the isomyricanol substitution pattern (e.g., 16), as verified by X-ray structural analysis. Compound 13 displayed robust tau-lowering activity, and, importantly, its enantiomers reduced tau levels similarly. Therefore, the semisynthetic analogue 13 provides a foundation for further development as a tau-lowering agent without its SAR being based on chirality.

  DOI：

  10.1021/cb501013w
• 作为产物：
  描述：

  2,3-二甲氧基苯酚 在 N-溴代丁二酰亚胺(NBS) 、 potassium carbonate 作用下， 以 四氢呋喃 、 丙酮 为溶剂， 生成 2-(苄氧基)-1-溴-3,4-二甲氧基苯
  参考文献：
  名称：

  抗肿瘤抗生素 (±)-链黑素的全合成：利用闭环复分解从头形成吡啶的第一代和第二代路线

  摘要：

  描述了 (±)-链黑素的全合成，这是一种有效的四环氨基喹啉-5,8-二酮抗肿瘤抗生素，于 20 世纪 70 年代进入 II 期临床试验。描述了构建关键五取代吡啶片段的两种途径，两者都依赖于闭环复分解，但在环化前体的取代和复杂性方面有所不同。两条路线都很短且产量高，第二代方法最终通过 14 个线性步骤提供 (±)-链黑素，并且从廉价的乙醛酸乙酯中获得 11% 的总产率。这种合成将允许设计和创建类似药物的后期天然产物类似物，以解决药理学限制。此外，在具有挑战性的不对称 Suzuki-Miyaura 交叉偶联反应中对许多手性配体的评估使得首次能够制备对映体富集（高达 42% ee）的合成链黑素中间体。

  DOI：

  10.1021/jo402388f

文献信息

• Total Synthesis of (±)-Streptonigrin: De Novo Construction of a Pentasubstituted Pyridine using Ring-Closing Metathesis
  作者：Timothy J. Donohoe、Christopher R. Jones、Luiz C. A. Barbosa

  DOI：10.1021/ja207835w

  日期：2011.10.19

  The synthesis of the potent antitumor agent (+/-)-streptonigrin has been achieved in 14 linear steps and 11% overall yield from ethyl glyoxalate. The synthesis features a challenging ring-closing metathesis reaction, followed by elimination and aromatization, to furnish a key pentasubstituted pyridine fragment.