2,3,5,6-tetrahydroxyphenanthrene | 93674-91-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 菲及其衍生物
• 英文名称: 2,3,5,6-tetrahydroxyphenanthrene
• 英文别名: Phenanthrene-2,3,5,6-tetrol
• CAS: 93674-91-0
• 化学式: C₁₄H₁₀O₄
• 分子量: 242.231
• InChiKey: KZQUDUXALDZUFX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  18
• 可旋转键数：
  0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  80.9
• 氢给体数：
  4
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  2,3,5,6-Tetramethoxy-phenanthrencarbonsaeure-(9)-methylester 在 喹啉 、 甲醇 、 三溴化硼 、 铜 、 sodium hydroxide 作用下， 以 二氯甲烷 、 水 为溶剂， 反应 26.0h， 生成 2,3,5,6-tetrahydroxyphenanthrene
  参考文献：
  名称：

  Synthesis and antioxidant activity of hydroxylated phenanthrenes as cis-restricted resveratrol analogues

  摘要：

  Five hydroxylated phenanthrenes as "cis-configuration-fixed" resveratrol analogues differing in the number and position of the hydroxyl groups were designed and synthesized. Their antioxidant activity was studied by ferric reducing antioxidant power, 2,2-diphenyl-1-picrylhydrazyl free radical-scavenging, and DNA strand breakage-inhibiting assays, corresponding to their electron-donating, hydrogen-transfer and DNA-protecting abilities, respectively. In the above assays, their activity depends significantly on the number and position of the hydroxyl groups, and most of them are more effective than resveratrol. Noticeably, compound 9b (2,4,6-trihydroxyl phenanthrene) with the same hydroxyl group substitutions as resveratrol, is superior to the reference compound, highlighting the importance of extension of the conjugation over multiple aromatic-rings. Similar activity sequences were obtained in different experimental models, but the appreciable differences could contribute detailed insights into antioxidant mechanisms. Based on these results, the hydroxylated phenanthrenes may be considered as a novel type of resveratrol-directed antioxidants. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.foodchem.2012.05.074

文献信息

• Process for production of vinyl chloride polymer
  申请人：Shin-Etsu Chemical Co., Ltd.

  公开号：EP0172427A2

  公开（公告）日：1986-02-26

  This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated π bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.

  该工艺是通过氯乙烯单体或氯乙烯单体与可与所述氯乙烯单体共聚的乙烯基单体混合物在水介质中进行悬浮聚合或乳液聚合来生产氯乙烯聚合物的工艺，其特征在于聚合是在聚合器中进行的、内壁表面及其辅助设备中可能在聚合过程中与单体接触的部分事先涂上一层防垢剂，该防垢剂至少包括一种选自染料、颜料和至少有 5 个共轭 π 键的芳香族或杂环化合物的防垢剂，同时控制反应混合物中的氯离子浓度不高于 100 ppm。根据上述工艺，可有效、可靠地防止聚合过程中聚合器等内壁表面结垢。
• Method of preventing polymer-scale formation
  申请人：Shin-Etsu Chemical Co., Ltd.

  公开号：EP0320227B1

  公开（公告）日：1994-09-07
• US4757124A
  申请人：——

  公开号：US4757124A

  公开（公告）日：1988-07-12
• US4758639A
  申请人：——

  公开号：US4758639A

  公开（公告）日：1988-07-19
• US4933399A
  申请人：——

  公开号：US4933399A

  公开（公告）日：1990-06-12