Benzenepropanoic acid, 3-methoxy-alpha,4-bis[(trimethylsilyl)oxy]-, trimethylsilyl ester | 55887-61-1

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: Benzenepropanoic acid, 3-methoxy-alpha,4-bis[(trimethylsilyl)oxy]-, trimethylsilyl ester
• 英文别名: trimethylsilyl 3-(3-methoxy-4-trimethylsilyloxyphenyl)-2-trimethylsilyloxypropanoate
• CAS: 55887-61-1
• 化学式: C₁₉H₃₆O₅Si₃
• 分子量: 428.748
• InChiKey: AXGULIYEKPVHPG-UHFFFAOYSA-N

物化性质

• 沸点：
  407.3±45.0 °C(Predicted)
• 密度：
  0.982±0.06 g/cm3(Predicted)
• 保留指数：
  2028;2022

计算性质

• 辛醇/水分配系数(LogP)：
  5.05
• 重原子数：
  27
• 可旋转键数：
  10
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.63
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  2,2,2-三氟-N,N-二(三甲硅基)乙酰胺 、 2-羟基-3-(4-羟基-3-甲氧基苯基)丙酸 在 吡啶 作用下， 反应 0.5h， 生成 Benzenepropanoic acid, 3-methoxy-alpha,4-bis[(trimethylsilyl)oxy]-, trimethylsilyl ester
  参考文献：
  名称：

  Conversion of Dehydrodiferulic Acids by Human Intestinal Microbiota

  摘要：

  Plant cell wall associated dehydrodiferulic acids (DFA) are abundant components of cereal insoluble dietary fibers ingested by humans. The ability of human intestinal microbiota to convert DFA was studied in vitro by incubating 8-O-4- and 5-5-coupled DFA with fecal suspensions. 8-O-4-DFA was completely degraded by the intestinal microbiota of the majority of donors, yielding homovanillic acid, 3-(3,4-dihydroxyphenyl)propionic acid, and 3,4-dihydroxyphenylacetic acid as the main metabolites. The transient formation of ferulic acid and presumably 3-(3-hydroxy-4-methoxyphenyl)pyruvic acid suggests an initial cleavage of the ether bond. In contrast to 8-O-4-DFA, the 5-5-coupled DFA was not cleaved into monomers by any of the fecal suspensions. Only the side chains were hydrogenated and the methoxy groups were demethylated. The cleavage of DFA by human intestinal microbiota, which depended on their coupling type, may affect both the bioavailability of DFA and the degradability of DFA-coupled fiber in the gut.

  DOI：

  10.1021/jf900159h

文献信息

• 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
• Conversion of Dehydrodiferulic Acids by Human Intestinal Microbiota
  作者：Annett Braune、Mirko Bunzel、Reiko Yonekura、Michael Blaut

  DOI：10.1021/jf900159h

  日期：2009.4.22

  Plant cell wall associated dehydrodiferulic acids (DFA) are abundant components of cereal insoluble dietary fibers ingested by humans. The ability of human intestinal microbiota to convert DFA was studied in vitro by incubating 8-O-4- and 5-5-coupled DFA with fecal suspensions. 8-O-4-DFA was completely degraded by the intestinal microbiota of the majority of donors, yielding homovanillic acid, 3-(3,4-dihydroxyphenyl)propionic acid, and 3,4-dihydroxyphenylacetic acid as the main metabolites. The transient formation of ferulic acid and presumably 3-(3-hydroxy-4-methoxyphenyl)pyruvic acid suggests an initial cleavage of the ether bond. In contrast to 8-O-4-DFA, the 5-5-coupled DFA was not cleaved into monomers by any of the fecal suspensions. Only the side chains were hydrogenated and the methoxy groups were demethylated. The cleavage of DFA by human intestinal microbiota, which depended on their coupling type, may affect both the bioavailability of DFA and the degradability of DFA-coupled fiber in the gut.

表征谱图