Tetrachlorohydroquinone bis(trimethylsilyl) ether | 17258-75-2

• 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: Tetrachlorohydroquinone bis(trimethylsilyl) ether
• 英文别名: bis(trimethylsilyl)tetrachlorohydroquinone；2,3,5,6-Tetrachlor-1,4-bis-trimethylsilyloxy-benzol；Trimethyl-(2,3,5,6-tetrachloro-4-trimethylsilyloxyphenoxy)silane
• CAS: 17258-75-2
• 化学式: C₁₂H₁₈Cl₄O₂Si₂
• 分子量: 392.257
• InChiKey: CFJJCFLPXBGVJD-UHFFFAOYSA-N

物化性质

• 沸点：
  360.9±42.0 °C(Predicted)
• 密度：
  1.215±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  6.73
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 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：

  四氯苯醌 、 phenyltellurotrimethylsilane 以 四氢呋喃 为溶剂， 反应 0.17h， 以96%的产率得到Tetrachlorohydroquinone bis(trimethylsilyl) ether
  参考文献：
  名称：

  Highly Efficient and Chemoselective Reductive Bis-silylation of Quinones by Silyltellurides

  摘要：

  [GRAPHICS]Silyltellurides serve as new silicon-based chemoselective reducing agents and reduce quinones to the corresponding bis-silylated hydroquinones. The reaction proceeds under ambient thermal conditions without the need of any additional promoters or catalysts and gives the products in excellent yields. Several control experiments suggest that the reaction is initiated by a single electron transfer from silyltellurides to quinones.

  DOI：

  10.1021/ol006581e

文献信息

• Beiträge zur chemie des iodpentafluorids teil III. Chelatisierung und strukturisomerie bei α,β-methylierten IOD(V)-α,β-ethandiolat-fluoriden
  作者：Hermann Josef Frohn、Wolfgang Pahlmann

  DOI：10.1016/s0022-1139(00)81142-2

  日期：1985.6

  We report metathetical reactions of IF5 with series of α,β-trimethylsilylated ethanediolates with increasing numbers of CH3-groups in α- and β-positions. Short lived intermediates IF4[OC2H4−n(CH3)nO]X with X = Si(CH3)3 or IF4 and stable chelates IF3[OC2H4−n(CH3)nO] and IF[OC2H4−n(CH3)nO]2 (n = 0–4) are observed and characterized. Time and temperature dependence of 19F-NMR-spectra in relation to degree

  我们报道了IF 5与一系列α，β-三甲基甲硅烷基化的乙二醇酯的易位反应，其中α-和β-位的CH 3基团数量增加。短寿命中间体IF 4 [OC 2 H 4-n（CH 3）n O] X和X = Si（CH 3）3或IF 4和稳定的螯合物IF 3 [OC 2 H 4-n（CH 3）n O ]和IF [OC 2 H 4-n（CH 3）n O] 2（n = 0–4）被观察并表征。讨论了19 F-NMR光谱与甲基化程度，排列方式和立体化学有关的时间和温度依赖性，参考了以前发布的包含一系列单齿醇化物CH 3-n的单核和多核I（V）-化合物（ CH 3）ñ ø -和（CH 3）3 CCH 2 ø -（N = 0,2,3）[1,2]和二齿醇化物- O（CH 2）ñ ø -（N = 2,3， 4,5,6,12）[1]。与脂族α相反，β-二醇化芳族二醇化1,2-C 6 H4（O - ）2，1,2--C 6氯4（O
• Synthesen mit verbindungen R3MHgMR3 und (R2MHg)n (MC, Si, Ge, Sn)
  作者：Guido Neumann、Wilhelm P. Neumann

  DOI：10.1016/s0022-328x(00)90077-9

  日期：1972.9

  Aromatic aldehydes are reductively dimerised by Me3SiHgSiMe3 (I), yielding bis(O-silyl)hydrobenzoin derivatives. 1,2-Diketones undergo 1,4-addition with formation of bis(O-silyl)enediols, while esters of conjugated dicarboxylic acids give O-silyl ketene acetals: maleic yields mainly the C,O-bissilyl derivative (1,4-addition), whereas fumaric and ethylene tetracarboxylic esters yield mainly the corresponding

  芳香醛是由我还原二聚3 SiHgSiMe 3（I），得到双（ø -甲硅烷基）氢化苯偶姻衍生物。1,2-二酮经过1,4-加成反应生成双（O-甲硅烷基）烯二醇，而共轭二羧酸的酯则生成O-甲硅烷基烯酮缩醛：马来酸主要产生C，O-双甲硅烷基衍生物（1,4- ，而富马酸酯和乙烯四羧酸酯主要产生相应的O，O-双甲硅烷基产物（1,6-加成）。1,2-和1,4-醌很容易被（I）转化成相应的双O-甲硅烷基）苯系。
• Chloranil-Sensitized Photolysis of Benzyltrimethylsilanes. Solvent Effect on the Competition between Carbon-Hydrogen and Carbon-Silicon Bond Cleavage
  作者：Enrico Baciocchi、Tiziana Del Giacco、Fausto Elisei、Marcella Ioele

  DOI：10.1021/jo00129a044

  日期：1995.12

  A steady state and laser flash photolysis study of the chloranil (CA)-sensitized oxidation of benzyltrimethylsilane (BTS) and (4-methoxybenzyl)trimethylsilane (MBTS) in different solvents (benzene, CH2Cl2, and MeCN) has been carried out. In benzene, BTS reacts with (3)CA* to give exclusively alpha-substituted benzyltrimethylsilane, whereas with MBTS the alpha-substituted silane is formed together with benzylic desilylation products. The latter situation also holds in CH2Cl2 for BTS. Only desilylation products are obtained from MBTS in CH2Cl2 and from both BTS and MBTS in MeCN. Higher quantum yields in the reactions with BTS than in those with MBTS have been observed in benzene and CH2Cl2. In MeCN, no significant change in quantum yield has been observed on going from BTS to MBTS. In MeCN with both BTS and MBTS and in CH2Cl2 with MBTS, the laser photolysis experiments have shown evidence for the formation of transients which can be attributed to MBTS(.+) and CA(.-) (MBTS in MeCN and CH2Cl2) and to CA(.-) (BTS in MeCN). This indicates that quenching of (3)CA* has taken place via an electron transfer process. Once formed, both BTS.+ and MBTS(.+) undergo exclusive C-Si bond cleavage. In CH2Cl2, this reaction is promoted by CA(.-), and accordingly, MBTS(.+) decays by a second-order kinetics. In MeCN, MBTS(.+) decays by a first-order kinetics and desilylation is promoted by the solvent itself. The same holds for BTS.+ as the decay reaction of this cation radical in MeCN appears much faster than that of CA(.-). In fact, only the transient assigned to the latter species has been observed in the laser photolysis experiments. A different situation has been found for both MBTS and BTS in benzene and BTS in CH2Cl2, where quenching of (3)CA* occurs via a partial charge transfer (CT) triplet complex. The reversible formation of this complex with MBTS in benzene is clearly indicated by the dependence of the observed rate constant for 3CA* quenching on the substrate concentration, which has allowed the association constant for the complex(ca. 400 M(-1)) to be determined. With BTS in benzene and CH2Cl2, the formation of the CT triplet complex is irreversible and rate determining, and the main evidence in this respect comes from the absence of a sizable deuterium kinetic isotope effect for the 3CA* quenching rate. With BTS in benzene, the CT complex undergoes C-H bond cleavage as the exclusive chemical reaction. With MBTS in benzene and BTS in CH2Cl2, both C-H and C-Si bond cleavages take place, and it is suggested that the cleavage of the latter bond requires more transfer of charge in the complex than the cleavage of the C-H bond. Alternatively, in CH2Cl2, the CT complex might evolve in part to a solvent-separated radical ion pair, exclusively leading to the C-Si bond cleavage products. The above results have also allowed an assessment of the scope of the benzyltrimethylsilane probe to detect electron transfer mechanisms.
• Efficient charge-transfer photochemistry via fragmentable cation radicals with variable lifetimes. Direct comparison with chloranil sensitization
  作者：S. Sankararaman、S. Perrier、J. K. Kochi

  DOI：10.1021/ja00198a081

  日期：1989.8
• Highly Efficient and Chemoselective Reductive Bis-silylation of Quinones by Silyltellurides
  作者：Shigeru Yamago、Hiroshi Miyazoe、Kazunori Iida、Jun-ichi Yoshida

  DOI：10.1021/ol006581e

  日期：2000.11.1

  [GRAPHICS]Silyltellurides serve as new silicon-based chemoselective reducing agents and reduce quinones to the corresponding bis-silylated hydroquinones. The reaction proceeds under ambient thermal conditions without the need of any additional promoters or catalysts and gives the products in excellent yields. Several control experiments suggest that the reaction is initiated by a single electron transfer from silyltellurides to quinones.