9,9-dimethylxanthene-3,6-dicarboxylic acid

• 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: 9,9-dimethylxanthene-3,6-dicarboxylic acid
• 化学式: C₁₇H₁₄O₅
• 分子量: 298.295
• InChiKey: OGTVKRZIDRTXDK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  22
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  83.8
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  甲醇 、 9,9-dimethylxanthene-3,6-dicarboxylic acid 在 硫酸 作用下， 反应 8.0h， 以90%的产率得到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 、 二叔丁基过氧化物 、 氢溴酸 、 氧气 、 cobalt(II) acetate 、 manganese(II) acetate 、 间甲酚 作用下， 以 溶剂黄146 为溶剂， 130.0~170.0 ℃ 、2.07 MPa 条件下， 反应 25.5h， 生成 9,9-dimethylxanthene-3,6-dicarboxylic acid
  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

• Xanthene polymers and copolymers
  申请人：GENERAL ELECTRIC COMPANY

  公开号：EP0675145A2

  公开（公告）日：1995-10-04

  Xanthene polyesters and polyamides are provided resulting from the reaction of alkylene, cycloaliphatic or aromatic diols or organo diamines with xanthene dicarboxylic esters or xanthene dicarboxylic acid halides. These amorphous, or crystalline film forming, high performance thermoplastics are useful in automative applications, and include copolymers and blends of such xanthene polymers.

  烷烃、环脂族或芳香族二元醇或有机二胺与呫吨二羧酸酯或呫吨二羧酸卤化物反应生成呫吨聚酯和聚酰胺。这些无定形或结晶成膜的高性能热塑性塑料可用于自动化应用，包括此类氧杂蒽聚合物的共聚物和混合物。
• AMORPHOUS POLYESTER COMPOSITIONS
  申请人：SABIC Global Technologies B.V.

  公开号：US20150322200A1

  公开（公告）日：2015-11-12

  Disclosed herein are polyester compositions comprising the reaction product of: a) a precursor component comprising xanthene dicarboxylic acid (XDA), or a reactive derivative thereof; b) a terephthalate component comprising at least one di(C1-C3 alkyl) terephthalate, or terephthalic acid, or a combination thereof; c) a diol component comprising 1,4-cyclohexane dimethanol (CHDM); and d) at least one metal catalyst; methods of making same, and articles comprising the disclosed compositions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.
• US5430199A
  申请人：——

  公开号：US5430199A

  公开（公告）日：1995-07-04
• US5466777A
  申请人：——

  公开号：US5466777A

  公开（公告）日：1995-11-14
• US5504184A
  申请人：——

  公开号：US5504184A

  公开（公告）日：1996-04-02