4-Methylguajacol-trimethylsilylaether | 132114-79-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: 4-Methylguajacol-trimethylsilylaether
• 英文别名: trimethyl(2-methoxy-4-methylphenoxy)silane；(4-methyl-2-methoxyphenoxy)trimethylsilane；2-Methoxy-4-methylphenol, TMS；(2-methoxy-4-methylphenoxy)-trimethylsilane
• CAS: 132114-79-5
• 化学式: C₁₁H₁₈O₂Si
• 分子量: 210.348
• InChiKey: ABIZNMPLNOLLOL-UHFFFAOYSA-N

物化性质

• 沸点：
  249.5±28.0 °C(Predicted)
• 密度：
  0.945±0.06 g/cm3(Predicted)
• 保留指数：
  1312

计算性质

• 辛醇/水分配系数(LogP)：
  3.22
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  2-甲氧基-4-甲基苯酚 生成 4-Methylguajacol-trimethylsilylaether
  参考文献：
  名称：

  LAUTERBUCH, MANFRED;JUGER, GUNTER;JANCKE, HARALD;LEHMANN, ANDREAS;ZIMMERM+, CHEM. TECHN. , 42,(1990) N, C. 264-268

  摘要：

  DOI：

文献信息

• Rice husk: Introduction of a green, cheap and reusable catalyst for the protection of alcohols, phenols, amines and thiols
  作者：Farhad Shirini、Somayeh Akbari-Dadamahaleh、Ali Mohammad-Khah、Ali-Reza Aliakbar

  DOI：10.1016/j.crci.2013.01.018

  日期：2014.2

  eco-friendly protocol for the chemoselective protection of benzylic and primary and less hindered secondary aliphatic alcohols and phenols as trimethylsilyl ethers and different types of amines as N-tert-butylcarbamates is developed using rice husk (RiH) as the catalyst. This reagent is also able to catalyze the acetylation of alcohols, phenols, thiols and amines with acetic anhydride. Easy work-up, relatively

  摘要 以稻壳 (RiH) 为原料，开发了一种温和、高效、环保的方案，用于化学选择性保护苄基和伯和受阻较小的仲脂肪醇和酚作为三甲基甲硅烷基醚以及不同类型的胺作为 N-叔丁基氨基甲酸酯。催化剂。该试剂还能够催化醇、酚、硫醇和胺与乙酸酐的乙酰化反应。该方法的显着特点是后处理简单、反应时间相对较短、收率高、成本低、催化剂的可用性和可重复使用性是该方法的显着特点，可被认为是保护醇、酚的最佳和通用方法之一、硫醇和胺。此外，
• Rice Husk Ash: A New, Cheap, Efficient, and Reusable Reagent for the Protection of Alcohols, Phenols, Amines, and Thiols
  作者：F. Shirini、Somayeh Akbari-Dadamahaleh、Ali Mohammad-Khah

  DOI：10.1080/10426507.2013.844142

  日期：2014.5.4

  Abstract A mild, efficient, and eco-friendly protocol for the protection of alcohols and phenols as trimethylsilyl ethers has been developed using rice husk ash as a reagent. This reagent is also able to catalyze the acetylation of alcohols, phenols, thiols, and amines with acetic anhydride. All reactions were performed under mild conditions in good to high yields. [Supplementary materials are available

  摘要 以稻壳灰为试剂，开发了一种温和、高效、环保的三甲基甲硅烷基醚类醇类和酚类保护方案。该试剂还能够催化醇、酚、硫醇和胺与乙酸酐的乙酰化反应。所有反应均在温和条件下以良好至高产率进行。[本文提供补充材料。访问出版商的在线版磷、硫和硅及相关元素，获取以下免费补充文件：附加文本、表格和数字。] 图形摘要
• 29Si and13C NMR spectra of 4-substituted 2-methoxytrimethylsiloxybenzenes. Factors determining the chemical shifts in models of lignin constituents
  作者：Jan Schraml、Magdalena Kvíčalová、Václav Chvalovský、Thomas Elder、Robert Brežný

  DOI：10.1002/mrc.1260281112

  日期：1990.11

  29Si and 13C NMR chemical shifts are reported for a series of twenty 4‐substituted 2‐methoxytrimethyl‐siloxybenzenes; the set of substituents incorporates a basic set of ten substituents differing in their relative polar and resonance effects and ten other substituents which model substituents encountered in lignins. The factors affecting the chemical shifts are discussed using a comparison with the

  报告了一系列 20 个 4-取代的 2-甲氧基三甲基-甲硅烷氧基苯的 29Si 和 13C NMR 化学位移；这组取代基包含一组基本的十个取代基，它们的相对极性和共振效应不同，以及十个模拟木质素中遇到的取代基的其他取代基。影响化学位移的因素通过与类似系列化合物的 NMR 数据进行比较、与取代基参数的相关性和通过量子化学方法计算的电子电荷（力场优化分子几何的 MNDO 计算）为基本集合进行讨论. 得出的结论是，在三甲基甲硅烷氧基的邻位上的甲氧基在其大部分时间里，甲基位于苯环平面内的构象，与呈垂直构象的三甲基甲硅烷氧基相反。在甲氧基和三甲基甲硅烷氧基上观察到的邻近去屏蔽效应受 4 位取代基的影响，这与这些效应是由于邻位氧原子或其未共享电子的相互作用的观点一致。29Si 化学位移对σpis 的依赖性基本上不受邻甲氧基存在的影响。这与这些效应是由于邻位氧原子或其未共享电子的相互作用的观点一致。29Si
• Highly atom economical uncatalysed and I2-catalysed silylation of phenols, alcohols and carbohydrates, using HMDS under solvent-free reaction conditions (SFRC)
  作者：Marjan Jereb

  DOI：10.1016/j.tet.2012.03.040

  日期：2012.5

  An uncatalysed silylation of phenols, regardless on the aggregate state and nature of the substituents with 0.55 equiv of HMDS under solvent-free reaction conditions (SFRC) at room temperature is reported. Sterically hindered phenols, carbohydrates and most of the alcohols additionally required a catalytic amount (up to 2 mol%) of iodine. The reaction protocol is very simple; obtaining a pure product, particularly of uncatalysed reactions, was frequently a completely solvent-free process. (C) 2012 Elsevier Ltd. All rights reserved.
• Chemoselective and Catalytic Trimethylsilylation of Alcohols and Phenols by 1,1,1,3,3,3-Hexamethyldisilazane and Catalytic Amounts of PhMe3N+Br3−
  作者：Arash GHORBANI-CHOGHAMARANI、Nasrin CHERAGHI-FATHABAD

  DOI：10.1016/s1872-2067(10)60107-6

  日期：2010.1

  An efficient procedure for the trimethylsilylation of alcohols and phenols is presented The combination of 1,1,1,3,3,3-hexamethyldisilazane and a catalytic amount of phenyltrimethylammonium tribromide ((PhMe3NBr3-)-Br-1) was found to be effective for the trimethylsilylation of alcohols and phenols The protection reaction is very simple and homogenously performed in dichloromethane at room temperature and mild conditions