3,4,6-三甲氧基-1,2-苯二酚 | 56002-81-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 酚类
• 中文名称: 3,4,6-三甲氧基-1,2-苯二酚
• 英文名称: 1,2-dihydroxy-3,4,6-trimethoxybenzene
• 英文别名: 2,3-dihydroxy-1,4,5-trimethoxybenzene；3,4,6-trimethoxy-pyrocatechol；5.6-Dihydroxy-1.2.4-trimethoxy-benzol；3,4,6-Trimethoxy-brenzcatechin；3,4,6-trimethoxybenzene-1,2-diol
• CAS: 56002-81-4
• 化学式: C₉H₁₂O₅
• 分子量: 200.191
• InChiKey: WPLWNUNZSLWPJE-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.1
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  68.2
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  3,4,6-三甲氧基-1,2-苯二酚 在 AlCl₃ 盐酸 、 氢氧化钾 、 碘 、 potassium carbonate 、 乙酰氯 、 硫酸二甲酯 、 sodium sulfite 作用下， 以 乙醚 、 乙醇 、 水 、 二甲基亚砜 、 丙酮 为溶剂， 生成 4'-benzyloxy-3',5,6,7,8-pentamethoxyflavone
  参考文献：
  名称：

  COGNITIVE DISORDER-AMELIORATING AGENT

  摘要：

  公开号：

  EP2311472B1
• 作为产物：
  描述：

  2,6-二甲氧基对苯二酚 在 sodium hydroxide 、 三氯化铝 、 sodium dithionite 、 乙醚 、 双氧水 作用下， 生成 3,4,6-三甲氧基-1,2-苯二酚
  参考文献：
  名称：

  121.五羟基苯的衍生物和花青素的合成

  摘要：

  DOI：

  10.1039/jr9410000662

文献信息

• MODIFIER FOR AROMATIC POLYESTER AND AROMATIC POLYESTER RESIN COMPOSITION COMPRISING THE SAME
  申请人：TABATA Masayoshi

  公开号：US20110224343A1

  公开（公告）日：2011-09-15

  The present invention provides a modifier for aromatic polyesters which enhances the melt fluidity of aromatic polyesters without a significant decrease in the heat resistance of the aromatic polyesters, and an aromatic polyester resin composition including the modifier for aromatic polyesters. The present invention relates to a modifier for aromatic polyesters comprising polyhydric phenol residues and residues of aromatic polycarboxylic acid, acid halide or acid anhydride thereof, and the modifier comprises a material having a structure composed of a first residue selected from the group consisting of divalent residues represented by Formula (I): —Ar—W 1 x —Ar— and by Formula (II): —Ar—, the first residues being bonded to two identical or different second residues selected from the group consisting of monovalent residues represented by Formula (III): and monovalent residues represented by Formula (IV): —O—C(O)—R 7 —.

  本发明提供了一种用于芳香族聚酯的改性剂，可以增强芳香族聚酯的熔融流动性，而不明显降低芳香族聚酯的耐热性，以及包括该改性剂的芳香族聚酯树脂组合物。本发明涉及一种用于芳香族聚酯的改性剂，包括多羟基酚残基和芳香族多羧酸、酸卤或其酸酐残基，该改性剂包括具有以下结构的材料：第一残基，选择自由式(I)所代表的二价残基：—Ar—W1x—Ar—和自由式(II)所代表的：—Ar—，第一残基与选择自由式(III)所代表的单价残基：和自由式(IV)所代表的单价残基：—O—C(O)—R7—的两个相同或不同的第二残基结合。
• Studies of the Selective<i>O</i>-Alkylation and Dealkylation of Flavonoids. XXI. A Convenient Method for Synthesizing 3,5,7-Trihydroxy-6,8-dimethoxyflavones and 5,7-Dihydroxy-3,6,8-trimethoxyflavones
  作者：Tokunaru Horie、Takeshi Kitou、Yasuhiko Kawamura、Kazuyo Yamashita

  DOI：10.1246/bcsj.69.1033

  日期：1996.4

  The Friedel–Crafts acetylation with boron trifluoride was studied and it was found that 1-(2,4-dihydroxy-3,5,6-trimethoxyphenyl)ethanone was conveniently synthesized from 2,3,5,6-tetramethoxyphenyl acetate in a mixture of acetic anhydride and acetic acid. 1-[2-Hydroxy-3,5,6-trimethoxy-4-(methoxymethoxy)phenyl]ethanone was cyclized to 7-hydroxy-5,6,8-trimethoxyflavone by using the Baker–Venkataraman transformation. The 7-benzyl ether of the flavone was oxidized with dimethyldioxirane and then treated with a small amount of p-toluenesulfonic acid to give 7-benzyloxy-3-hydroxy-5,6,8-trimethoxyflavone, which was converted into the methyl ether and tosylate. The 5-methoxy group in the methyl ether or tosylate was selectively cleaved with anhydrous aluminum bromide in acetonitrile under mild conditions to give the corresponding 5-hydroxyflavones and the latter compound with a 3-tosyloxy group was smoothly converted into the 3,5-dihydroxyflavone by hydrolysis with potassium carbonate in methanol. The hydrogenolysis of the 7-benzyloxy-3,5-dihydroxyflavone and its 3-methyl ether afforded quantitatively 3,5,7-trihydroxy-6,8-dimethoxyflavone and its 3-methyl ether. The process was suitable as a general method for synthesizing 3,5,7-trihydroxy-6,8-dimethoxyflavones and their 3-methyl ethers and the six flavones were synthesized for the clarification of their 1H and 13C NMR, MS, and UV spectral properties.

  研究了三氟化硼的 Friedel-Crafts 乙酰化反应，发现在乙酸酐和乙酸的混合物中，可以方便地从 2,3,5,6- 四甲氧基苯基乙酸酯合成 1-(2,4-二羟基-3,5,6-三甲氧基苯基)乙酮。1-[2-羟基-3,5,6-三甲氧基-4-（甲氧基甲氧基）苯基]乙酮通过贝克-文卡塔拉曼转化环化成 7-羟基-5,6,8-三甲氧基黄酮。黄酮的 7-苄基醚被二甲基二氧环己烷氧化，然后用少量对甲苯磺酸处理，得到 7-苄氧基-3-羟基-5,6,8-三甲氧基黄酮，并将其转化为甲醚和对甲苯磺酸盐。在温和的条件下，用无水溴化铝在乙腈中选择性地裂解甲醚或对甲苯磺酸盐中的 5-甲氧基，得到相应的 5-羟基黄酮，而后一种带有 3-对甲苯磺酸盐基团的化合物在甲醇中用碳酸钾水解，顺利地转化为 3,5-二羟基黄酮。通过氢解 7-苄氧基-3,5-二羟基黄酮及其 3-甲基醚，可定量得到 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚。该方法适用于合成 3,5,7-三羟基-6,8-二甲氧基黄酮及其 3-甲基醚，合成的六种黄酮的 1H 和 13C NMR、MS 和 UV 光谱特性得到了澄清。
• COGNITIVE IMPAIRMENT AMELIORANT
  申请人：Yamaguchi Kikuji

  公开号：US20110287106A1

  公开（公告）日：2011-11-24

  A cognitive impairment ameliorant is provided that is useful for the prevention or treatment of cognitive impairment, and particularly Alzheimer's disease. The cognitive impairment ameliorant contains royal jelly as an active ingredient thereof.

  提供一种认知障碍改善剂，可用于预防或治疗认知障碍，特别是阿尔茨海默病。该认知障碍改善剂包含蜂王浆作为其活性成分。
• AROMATIC POLYESTER
  申请人：Muroran Institute of Technology

  公开号：EP2479203A1

  公开（公告）日：2012-07-25

  The present invention provides an aromatic polyester which is substantially free from the occurrence of coloration and retains significantly high transparency even after being thermally processed at high temperature and which has high flowability. The aromatic polyester contains a polyhydric phenol residue and a residue of any one of aromatic polycarboxylic acid, halide thereof, and anhydride thereof, and terminals of the aromatic polyester have a structure represented by the formula -C(O)-R. The aromatic polyester has an end-capping rate of 90% or higher and a weight average molecular weight (Mw) ranging from 3,000 to 1,000,000.

  本发明提供了一种芳香族聚酯，该聚酯基本上不会发生着色，即使在高温热加工后仍能保持明显的高透明度，并且具有高流动性。芳香族聚酯含有多羟基苯酚残留物和芳香族多羧酸、其卤化物和其酸酐中任意一种的残留物，芳香族聚酯的端基具有式 -C(O)-R 所代表的结构。芳香族聚酯的端盖率为 90% 或更高，重量平均分子量（Mw）为 3,000 至 1,000,000 之间。
• 121. Derivatives of pentahydroxybenzene, and a synthesis of pedicellin
  作者：Wilson Baker

  DOI：10.1039/jr9410000662

  日期：——