3,6,9,9-tetramethylxanthene | 19814-64-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 3,6,9,9-tetramethylxanthene
• CAS: 19814-64-3
• 化学式: C₁₇H₁₈O
• 分子量: 238.329
• InChiKey: BBKHPQNVWYFMFL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.1
• 重原子数：
  18
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  3,6,9,9-tetramethylxanthene 在 二叔丁基过氧化物 、 硫酸 、 氢溴酸 、 氧气 、 cobalt(II) acetate 、 manganese(II) acetate 作用下， 以 溶剂黄146 为溶剂， 130.0~170.0 ℃ 、2.07 MPa 条件下， 反应 12.0h， 生成 Dimethyl 9,9-dimethylxanthene-3,6-dicarboxylate
  参考文献：
  名称：

  A New Reaction of Bisphenol A and Preparation of Polysubstituted 9,9-Dimethylxanthenes

  摘要：

  A new transformation of bisphenol A (1) to polymethylated 9,9-dimethylxanthenes 2-5 in the presence of an exogenous phenol is described. The reaction proceeds with concurrent liberation of phenol, is catalyzed by strong acid, and takes place at synthetically useful rates at temperatures above 100 degrees C. Materials chemically related to bisphenol A polycarbonate 10, chroman fl, and tars generated during the manufacture of 1, behave similarly. The product xanthenes are useful as precursors to novel xanthene polyesters such as 33 having high glass transition temperatures relative to analogous materials based on 12 or 13. Catalytic oxidation of xanthenes 2-4 affords highly insoluble diacids that are esterified to the esters 6-8. A mechanistic framework accounting for the appearance of chroman 23 and spiroketal 24 as intermediates is given. Overall, the reaction has the characteristics of a complex series of equilibria in which xanthenes such as 2 are strongly favored.

  DOI：

  10.1021/jo961766d
• 作为产物：
  描述：

  2'-羟基-2,4,4,7,4'-五甲基黄烷 在 甲烷磺酸 、 间甲酚 作用下， 以 various solvent(s) 为溶剂， 反应 21.5h， 以94%的产率得到3,6,9,9-tetramethylxanthene
  参考文献：
  名称：

  A New Reaction of Bisphenol A and Preparation of Polysubstituted 9,9-Dimethylxanthenes

  摘要：

  A new transformation of bisphenol A (1) to polymethylated 9,9-dimethylxanthenes 2-5 in the presence of an exogenous phenol is described. The reaction proceeds with concurrent liberation of phenol, is catalyzed by strong acid, and takes place at synthetically useful rates at temperatures above 100 degrees C. Materials chemically related to bisphenol A polycarbonate 10, chroman fl, and tars generated during the manufacture of 1, behave similarly. The product xanthenes are useful as precursors to novel xanthene polyesters such as 33 having high glass transition temperatures relative to analogous materials based on 12 or 13. Catalytic oxidation of xanthenes 2-4 affords highly insoluble diacids that are esterified to the esters 6-8. A mechanistic framework accounting for the appearance of chroman 23 and spiroketal 24 as intermediates is given. Overall, the reaction has the characteristics of a complex series of equilibria in which xanthenes such as 2 are strongly favored.

  DOI：

  10.1021/jo961766d

文献信息

• RESIN COMPOSITION, STRETCHED FILM, CIRCULARLY POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
  申请人：MITSUBISHI CHEMICAL CORPORATION

  公开号：US20150247002A1

  公开（公告）日：2015-09-03

  The invention relates to a resin composition which comprises a polymer having a divalent oligofluorene as a repeating unit therein, wherein the divalent oligofluorene contains at least two fluorene units optionally having a substituent, and the 9-positioned carbon atoms of the fluorene units bond to each other via a direct bond or via an alkylene group optionally having a substituent, an arylene group optionally having a substituent, or an aralkylene group optionally having a substituent, and a ratio of a retardation measured at a wavelength of 450 nm (Re450) to a retardation measured at a wavelength of 550 nm (Re550) satisfies the following formula (2): Re450/Re550≦1.0.

  本发明涉及一种树脂组合物，其中包括具有二价寡聚芴作为重复单元的聚合物，其中二价寡聚芴包含至少两个芴单元，可选地具有取代基，并且芴单元的9位碳原子通过直接键或通过可选具有取代基的烷基、芳基或芳基烷基相互结合。在450nm波长（Re450）和550nm波长（Re550）下测得的减速比之比（Re450/Re550）符合以下公式（2）：Re450/Re550≦1.0。
• Method for recovering phenol and xanthene values from waste polycarbonate
  申请人：GENERAL ELECTRIC COMPANY

  公开号：EP0738702A1

  公开（公告）日：1996-10-23

  Organic values are salvaged from scrap polycarbonate by heating in the presence of an acid catalyst and a C1-4 alkyl phenol such as m- or p-cresol. Among the compounds which can be salvaged are polyalkylated xanthenes, phenol and diaryl carbonate.

  在酸催化剂和 C1-4 烷基酚（如间甲酚或对甲酚）的作用下加热，可从废聚碳酸酯中回收有机值。可回收的化合物包括聚烷基化的呫吨、苯酚和碳酸二芳基酯。
• Organic electroluminescent materials and devices
  申请人：Universal Display Corporation

  公开号：US10680184B2

  公开（公告）日：2020-06-09

  The present application includes novel containing xanthene and spiro dixanthene ring structures and alkylated variants thereof. These compounds are useful as host materials with high triplet energies for phosphorescent electroluminescent devices.

  本申请包括含有呫吨和螺二呫吨环结构的新型化合物及其烷基化变体。这些化合物可用作磷光电致发光器件的高三重能主材料。
• 4,4,4′,4′,7,7′-Hexamethyl-2,2′-spirobichroman
  作者：Krzysztof Ejsmont、Janusz Kyzioł、Ewa Nowakowska、Jacek Zaleski

  DOI：10.1107/s0108270199013190

  日期：2000.1.15

  The title compound, C23H28O2, was obtained from the reaction of acetone with meta-cresol. The molecular structure consists of two identical subunits which are nearly perpendicular to each other. The oxygen-containing rings are not planar and the molecule is chiral. The crystal structure consists of chains of molecules of the same chirality arranged along the [010] axis.
• Method for making polyalkylated xanthenes
  申请人：GENERAL ELECTRIC COMPANY

  公开号：EP0738723B1

  公开（公告）日：2002-03-13