3,4-dimethoxybenzyl (methylthio)methyl ether | 850146-99-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 3,4-dimethoxybenzyl (methylthio)methyl ether
• 英文别名: 1,2-dimethoxy-4-(methylsulfanylmethoxymethyl)benzene
• CAS: 850146-99-5
• 化学式: C₁₁H₁₆O₃S
• 分子量: 228.312
• InChiKey: UQOMFAYCPKOLHF-UHFFFAOYSA-N

物化性质

• 沸点：
  305.2±37.0 °C(Predicted)
• 密度：
  1.102±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.54
• 重原子数：
  15.0
• 可旋转键数：
  6.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  27.69
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  3,4-dimethoxybenzyl (methylthio)methyl ether 在 磺酰氯 、 四丁基氟化铵 、 溶剂黄146 、 N,N-二异丙基乙胺 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 45.83h， 生成
  参考文献：
  名称：

  以镍/铬介导的偶联反应为特征的第二代苹果碱A的全合成†

  摘要：

  使用Ni / Cr介导的偶联反应作为关键步骤，实现了有效的抗肿瘤海洋大环内酯aplyronine A的第二代全合成。基于最长的线性序列，分38步获得的第二代aplyronine A合成途径的总产率为1.4％。与我们的第一代合成的邻苯丙氨酸A路径相比，第二代合成极大地提高了收率和步骤数。特别是，我们在C13立体中心和C14–C15（ENi / Cr介导的不对称偶联反应））-三取代双键。此外，我们为C21–C28和C29–C34之间的不对称Ni / Cr介导的偶联反应建立了有效的反应条件。因此，该偶联反应以各链段的等摩尔比进行。

  DOI：

  10.1039/c6ob02241c
• 作为产物：
  描述：

  氯甲基甲硫醚 、 3,4-二甲氧基苄醇 在 sodium hydride 作用下， 以 乙二醇二甲醚 、 paraffin 为溶剂， 以67%的产率得到3,4-dimethoxybenzyl (methylthio)methyl ether
  参考文献：
  名称：

  Aplyronine A, a Potent Antitumor Substance of Marine Origin, Aplyronines B and C, and Artificial Analogues:  Total Synthesis and Structure−Cytotoxicity Relationships

  摘要：

  The enantioselective total synthesis of aplyronine A (1), a potent antitumor substance of marine origin, was achieved by a convergent-approach Three segments 4, 5, and 6, corresponding to the C5-C11, C21-C27, and C28-C34 portions of aplyronine A (1), were prepared using:the Evans aldol reaction and the Sharpless epoxidation as key steps. The coupling reaction of 4 with iodide 7 followed by julia olefination with sulfone 8 gave the C5-C20 segment 9, while the julia coupling reaction between segments 5 and 6 provided the C21-C34 segment 10. Julia olefination between segments 9 and 10 and the subsequent four-carbon homologation reaction led to seco acid 83, which was converted into aplyronine A (1) by Yamaguchi lactonization followed by the introduction of two amino acids. The use of the [(3,4-dimethoxybenzyl)oxy]methyl group as a protecting group for the hydroxyl at C29 was crucial for this synthesis. The enantioselective synthesis of two natural congeners, aplyronines B (2) acid C (3), was also carried out using the intermediates for the synthesis of 1, which determined the absolute stereostructures of 2 and 3 unambiguously. To study the structure-cytotoxicity relationships of aplyronines, artificial analogues of 1 were synthesized and their cytotoxicities were evaluated: the trimethylserine moiety, two hydroxyl groups, and the side-chain portion in 1 turned out to be important in the potent cytotoxicity shown by 1. Biological studies with aplyronine A (1) showed that 1 inhibited polymerization of G-actin to F-actin and depolymerized F-actin to G-actin.

  DOI：

  10.1021/jo9606113

文献信息

• Dinuclear Asymmetric Zn Aldol Additions:  Formal Asymmetric Synthesis of Fostriecin
  作者：Barry M. Trost、Mathias U. Frederiksen、Julien P. N. Papillon、Paul E. Harrington、Seunghoon Shin、Brock T. Shireman

  DOI：10.1021/ja042435i

  日期：2005.3.1

  Direct asymmetric aldol reactions constitute a powerful methodology for the efficient synthesis of complex natural products. Herein we report the first application of our recently reported dinuclear Zn-catalyzed direct aldol addition of alkynyl ketones to aldehydes in a short and efficient formal asymmetric synthesis of fostriecin, a potent cyctotoxic natural product. This work highlights not only the power of the aldol methodology but also the utility of the akynyl silane aldol adducts, as it is subsequently utilized in a vinyl silane cross-coupling reaction which affords the target molecule in 14 steps for the longest linear sequence in 8.5% overall yield.