5-nitro-2-trimethylsilylthiophene | 77998-65-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 噻吩类
• 英文名称: 5-nitro-2-trimethylsilylthiophene
• 英文别名: 2-nitro-5-trimethylsilylthiophene；Trimethyl-(5-nitrothiophen-2-yl)silane；trimethyl-(5-nitrothiophen-2-yl)silane
• CAS: 77998-65-3
• 化学式: C₇H₁₁NO₂SSi
• 分子量: 201.321
• InChiKey: XFJMQHUUOHYILX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  74.1
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-nitro-2-trimethylsilylthiophene 在 sodium methylate 作用下， 以 甲醇 为溶剂， 生成 2-硝基噻吩
  参考文献：
  名称：

  取代的2-噻吩基三甲基硅烷的碱解速率。从头开始计算单取代噻吩的酸度

  摘要：

  Rates of cleavage in NaOMe-MeOH at 50°C have been determined for the mono-substituted 2-trimethylsilylthiophens X·C4H2S·SiMe3-2 with X = H, 3-NO2, 3-Br, 4-Br-, and 5-NO2, -CN, -COPh, -Me, -OMe and -NMe2, and for one disubstituted compound, 4,5-Br2-C4HS-SiMe3-2. For several compounds the rate and product isotope effects have also been determined. The energies involved in the process X·C4H3S → X·C4H2S−

  DOI：

  10.1016/s0022-328x(00)84581-7
• 作为产物：
  描述：

  2-硝基噻吩 、 (三氟甲基)三甲基硅烷 在 rubidium fluoride 作用下， 反应 2.0h， 以68%的产率得到5-nitro-2-trimethylsilylthiophene
  参考文献：
  名称：

  三氟甲基三烷基硅烷与氟化物对官能化芳烃和杂芳烃的去质子化CHH甲硅烷基化

  摘要：

  使用被碱金属氟化物活化的Ruppert-Prakash试剂（TMSCF 3），开发了功能化芳烃和杂芳烃的高选择性C-H甲硅烷基化反应。TMSCF 3被认为是温和碱的前体以及亲电子体具有双重作用。甲硅烷基化与敏感的官能团如卤素和硝基相容。

  DOI：

  10.1021/ol503671b

文献信息

• The rates of base cleavage of substituted 2-thienyltrimethylsilanes. AB initio calculations of the acidities of monosubstituted thiophens
  作者：Giancarlo Seconi、Colin Eaborn、John G. Stamper

  DOI：10.1016/s0022-328x(00)84581-7

  日期：1981.1

  NaOMe-MeOH at 50°C have been determined for the mono-substituted 2-trimethylsilylthiophens X·C4H2S·SiMe3-2 with X = H, 3-NO2, 3-Br, 4-Br-, and 5-NO2, -CN, -COPh, -Me, -OMe and -NMe2, and for one disubstituted compound, 4,5-Br2-C4HS-SiMe3-2. For several compounds the rate and product isotope effects have also been determined. The energies involved in the process X·C4H3S → X·C4H2S− for deprotonation at

  Rates of cleavage in NaOMe-MeOH at 50°C have been determined for the mono-substituted 2-trimethylsilylthiophens X·C4H2S·SiMe3-2 with X = H, 3-NO2, 3-Br, 4-Br-, and 5-NO2, -CN, -COPh, -Me, -OMe and -NMe2, and for one disubstituted compound, 4,5-Br2-C4HS-SiMe3-2. For several compounds the rate and product isotope effects have also been determined. The energies involved in the process X·C4H3S → X·C4H2S−
• Deprotonative C–H Silylation of Functionalized Arenes and Heteroarenes Using Trifluoromethyltrialkylsilane with Fluoride
  作者：Midori Sasaki、Yoshinori Kondo

  DOI：10.1021/ol503671b

  日期：2015.2.20

  A highly selective C–H silylation reaction of functionalized arenes and heteroarenes was developed using Ruppert–Prakash reagent (TMSCF3) activated by alkali metal fluoride. TMSCF3 is considered to play dual roles as a precursor of a mild base and also as a silicon electrophile. The silylation is compatible with sensitive functional groups such as halogen and nitro groups.

  使用被碱金属氟化物活化的Ruppert-Prakash试剂（TMSCF 3），开发了功能化芳烃和杂芳烃的高选择性C-H甲硅烷基化反应。TMSCF 3被认为是温和碱的前体以及亲电子体具有双重作用。甲硅烷基化与敏感的官能团如卤素和硝基相容。
• Protiodesilylation of substituted 2-trimethylsilylthiophens
  作者：Giancarlo Seconi、Colin Eaborn

  DOI：10.1039/p29810000931

  日期：——

  system; 3– and 5-O2NC4H2S˙SiMe3 are less reactive than would be expected from the correlations. Again with the exception of the data for the nitro-compound, the log krel values for the 4– and 5– substituted thiophens show very good correlation with σm+ and σp+ constants.

  在50℃下一级速率常数已被确定为的裂解噻吩化合物XC 4 ħ 2 S˙SiMe 3 -2（a）中的MeOH（5体积）用含水的HClO的混合物4（2体积）和（b）CH 3 CO 2 H（4体积）与H 2 SO 4水溶液（3体积）。在第一种介质中的相对比率k rel是（X =）5-OMe，7 200；5我，36; H，1.00； H，1.00。5-Cl，1.08×10 –1 ; 5-溴，9.0×10 -2 ; 3-溴，5.0×10 –2 ; 4-Br，4.9×10 –3，第二种介质，5-Me，36；H，1.00； H，1.00。5-Cl，1.28×10 –1；5-溴，9.8×10–2 ; 3-溴，5.5×10 –2 ; 4-溴，6.5×10 –3；5-NO 2，7.1×10 -7 ; 3-NO 2，7.1×10 -7。除了硝基化合物，两组日志ķ相对值示出与相应的XC的值良好的线性相关性6 ħ