2,4,5,6-tetrachlororesorcinol | 28520-00-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 酚类
• 英文名称: 2,4,5,6-tetrachlororesorcinol
• 英文别名: Tetrachlororesorcinol；2,4,5,6-tetrachloro-resorcinol；2,4,5,6-Tetrachlor-resorcin；2,4,5,6-tetrachloro-1,3-benzenediol；Tetrachlorresorcinol；Tetrachlor-resorcin；2,4,5,6-tetrachlorobenzene-1,3-diol
• CAS: 28520-00-5
• 化学式: C₆H₂Cl₄O₂
• 分子量: 247.893
• InChiKey: SBQZVLLSNGZXLX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,4,5,6-tetrachlororesorcinol 、 乙酸酐 在 sodium carbonate 作用下， 以 水 为溶剂， 反应 0.02h， 生成 2,4,5,6-tetrachlororesorcinol diacetate
  参考文献：
  名称：

  Properties of chlorinated dihydroxybenzenes — Components of pulp bleaching effluents

  摘要：

  Gas chromatography and mass spectrometry data are given for the acetates of the chlorodihydroxybenzenes which are components of wood pulp bleaching effluents and biologically-treated effluents, and are proposed intermediates in the chlorination of humic acids. The chlorohydroxybenzenes include the nine chlorocatechols, the six chlorohydroquinones and the seven known chlororesorcinols. The 22 chlorinated compounds were generally well separated on a phenyl methyl silicone column with the exception of three dichloro compounds. The chloro compounds with the same level of chlorine substitution were not able to be distinguished on the basis of their electron impact mass spectra.

  DOI：

  10.1016/0045-6535(94)90285-2
• 作为产物：
  描述：

  hexachloro-4-cyclohexene-1,3-dione 在 tin(ll) chloride 作用下， 以 溶剂黄146 为溶剂， 反应 0.5h， 生成 2,4,5,6-tetrachlororesorcinol
  参考文献：
  名称：

  Properties of chlorinated dihydroxybenzenes — Components of pulp bleaching effluents

  摘要：

  Gas chromatography and mass spectrometry data are given for the acetates of the chlorodihydroxybenzenes which are components of wood pulp bleaching effluents and biologically-treated effluents, and are proposed intermediates in the chlorination of humic acids. The chlorohydroxybenzenes include the nine chlorocatechols, the six chlorohydroquinones and the seven known chlororesorcinols. The 22 chlorinated compounds were generally well separated on a phenyl methyl silicone column with the exception of three dichloro compounds. The chloro compounds with the same level of chlorine substitution were not able to be distinguished on the basis of their electron impact mass spectra.

  DOI：

  10.1016/0045-6535(94)90285-2

文献信息

• Process for the preparation of halogenated (meth)acrylic esters and poly (meth) arcylates obtained with said (meth)acrylic esters
  申请人：Akzo Nobel N.V.

  公开号：EP0824096A2

  公开（公告）日：1998-02-18

  The present invention is directed to a process for the preparation of (meth)acrylates of halogenated alcohols by direct esterification of said alcohols with (meth)acrylic acid (chloride) wherein at least 2,6-substituted pyridine derivative is used as a polymerization inhibitor at room temperature or lower. Suitable at least 2,6-substituted pyridine derivatives are 2,6-lutidine, 2,4,6-collidine or 2,6-di-tert.butyl-4-methyl pyridine. With the halogenated (meth)acrylate esters prepared with the process according to the invention, very pure homo- and copolymers can be prepared, resulting in polymers having a low optical loss of 0.1 dB/cm or lower at 1300 nm and lower than 0.4 dB/cm at 1550 nm.

  本发明涉及一种通过将卤代醇与（甲基）丙烯酸（氯化物）直接酯化来制备（甲基）丙烯酸酯的方法，其中至少使用一种2,6-取代吡啶衍生物作为聚合抑制剂，温度为室温或更低。适用的至少2,6-取代吡啶衍生物包括2,6-吡啶、2,4,6-考林或2,6-二叔丁基-4-甲基吡啶。 通过根据本发明的方法制备的卤代（甲基）丙烯酸酯，可以制备非常纯净的同聚物和共聚物，从而得到在1300纳米处光学损耗低至0.1 dB/cm或更低，在1550纳米处低于0.4 dB/cm的聚合物。
• METHOD FOR MANUFACTURING ESTER
  申请人：Ishihara Kazuaki

  公开号：US20130217898A1

  公开（公告）日：2013-08-22

  The present invention relates to a method for manufacturing an ester from a ketone or an aldehyde, which is a reactive substrate, by a Baeyer-Villiger oxidation reaction using hydrogen peroxide, and in this method, as a catalyst, M(BAr 4 ) n , which is a metal borate, is used (M represents an alkali metal or an alkaline earth metal; Ar represents an aryl; and n is the same number as the valence of M). For example, when cyclohexanone was used as the reactive substrate, and Sr[B(3,5-CF 3 C 6 H 3 ) 4 ] 2 was used as the catalyst, ε-caprolactone was obtained at an isolated yield of 82%.

  本发明涉及一种从酮或醛（作为反应底物）制造酯的方法，该方法通过使用过氧化氢进行巴耶-维利格氧化反应，在该方法中，作为催化剂使用了M(BAr4)n，该催化剂是一种金属硼酸盐（M代表碱金属或碱土金属；Ar代表芳基；n与M的化合价相同）。例如，当环己酮作为反应底物，Sr[B(3,5-CF3C6H3)4]2作为催化剂时，得到了ε-己内酯，其分离收率为82%。
• Synthesis of Mn-doped TiO2 by novel route and photocatalytic mineralization/intermediate studies of organic pollutants
  作者：Khalid Umar、Mohamad Nasir Mohamad Ibrahim、Akil Ahmad、Mohd Rafatullah

  DOI：10.1007/s11164-019-03771-x

  日期：2019.5

  as X-ray diffraction, scanning electron microscopy and UV–Vis spectroscopy. The photocatalytic activity of the synthesized particles was compared by investigating the mineralization of two selected organic pollutants like ketoprofen and chlorothalonil. The photocatalysts which were produced by improved sol–gel technique show the lower value of band gap energy and small size crystallite and, hence, exhibit

  TiO 2的掺杂使用简单的溶胶-凝胶法和改进的溶胶-凝胶法合成了各种锰（Mn）浓度（0.25-1.0％）的颗粒。使用标准分析技术（例如X射线衍射，扫描电子显微镜和UV-Vis光谱）发现了合成颗粒的特征。通过研究两种选定的有机污染物（如酮洛芬和百菌清）的矿化作用，比较了合成颗粒的光催化活性。通过改进的溶胶-凝胶技术生产的光催化剂显示出较低的带隙能量值和小尺寸的微晶，因此显示出更好的光催化活性。结果还表明掺杂剂Mn 0的浓度。75％的化合物在两种化合物的矿化过程中显示出比其他浓度的掺杂剂最高的光催化活性。研究了两种化合物在各种情况下的矿化动力学，例如反应pH和催化剂用量。矿化速率受上述所有参数的影响很大。还使用GC-MS分析方法突出显示了两种化合物光氧化过程中产生的中间体。两种化合物均显示出几种中间体的产生。已经提出了生产不同产品的可能途径。还使用GC-MS分析方法突出显示了两种化合物光氧化过
• Halogenated acrylates and polymers derived therefrom
  申请人：3M Innovative Properties Company

  公开号：US20010037028A1

  公开（公告）日：2001-11-01

  Acrylates having a high degree of halogenation, as well as polymers that include one or more mer units derived from such acrylates provide materials having tailorable optical and physical properties. The polymers find utility particularly in optical devices including optical waveguides and interconnecting devices.

  具有高度卤化度的丙烯酸酯，以及包括一个或多个源自这种丙烯酸酯的聚合物单元的聚合物，提供具有可调光学和物理特性的材料。这些聚合物特别适用于包括光波导和互连装置在内的光学器件。
• Low temperature synthesis of condensation polymers
  申请人：SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

  公开号：EP0277907A2

  公开（公告）日：1988-08-10

  Condensation polymers of high molecular weight, such as polyesters, polyureas, and polyamides, are usually prepared at temperatures of 200°C or greater. However, by utilizing the catalyst systems of the present invention, condensation polymers can be synthesized at much lower temperatures. The polycondensation catalyst systems of the present invention are particularly useful for synthesizing aliphatic polyesters, such as polyethylene terephthalate, from dicarboxylic acids and aliphatic glycols. The present invention more specifically discloses a process for the synthesis of an aliphatic polyester comprising polymerizing at least one dicarboxylic acid with at least one aliphatic glycol in the presence of (1) at least one phosphorus containing compound which contains at least one trivalent or pentavalent phosphorus atom which is bonded directly to at least one phenyl group, (2) an acid acceptor, and (3) at least one halogenated organic compound. It is preferred to utilize a polymeric agent having bound acid acceptor groups as the acid acceptor in the process of the present invention.

  高分子量缩聚聚合物，如聚酯、聚脲和聚酰胺，通常在 200°C 或更高温度下制备。然而，利用本发明的催化剂体系，缩聚聚合物可以在更低的温度下合成。本发明的缩聚催化剂体系尤其适用于从二羧酸和脂肪族乙二醇合成脂肪族聚酯，如聚对苯二甲酸乙二醇酯。本发明更具体地公开了一种合成脂肪族聚酯的工艺，该工艺包括至少一种二羧酸与至少一种脂肪族乙二醇在（1）至少一种含磷化合物（该化合物含有至少一个直接与至少一个苯基键合的三价或五价磷）、（2）一种酸接受体和（3）至少一种卤代有机化合物存在下进行聚合。在本发明的工艺中，最好使用具有结合的酸受体基团的聚合剂作为酸受体。