2-hydroxy-3,4-dimethoxyphenol | 3997-18-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 酚类
• 英文名称: 2-hydroxy-3,4-dimethoxyphenol
• 英文别名: 1,2-dihydroxy-3,4-dimethoxybenzene；3,4-Dimethoxybrenzkatechin；3,4-Dimethoxybenzene-1,2-diol
• CAS: 3997-18-0
• 化学式: C₈H₁₀O₄
• 分子量: 170.165
• InChiKey: UVNRAOUIOBZBCS-UHFFFAOYSA-N

物化性质

• 沸点：
  122-124 °C(Press: 0.7 Torr)
• 密度：
  1.267±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.6
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.25
• 拓扑面积：
  58.9
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  2-hydroxy-3,4-dimethoxyphenol 在 二硫化碳 、 氢氧化钾 、 sodium hydroxide 、 三氯化铝 、 乙醇 、 氢碘酸 、 双氧水 、 potassium carbonate 、 溶剂黄146 、 丙酮 作用下， 生成 3,6,7,8-tetrahydroxy-2-phenyl-chromen-4-one
  参考文献：
  名称：

  Oliverio; Bargellini, Gazzetta Chimica Italiana, 1948, vol. 78, p. 386,394

  摘要：

  DOI：
• 作为产物：
  描述：

  2',3',4'-三羟基苯乙酮 在 sodium hydroxide 、 双氧水 、 potassium carbonate 、 苯 作用下， 生成 2-hydroxy-3,4-dimethoxyphenol
  参考文献：
  名称：

  368. 1：2：3：4-四羟基苯的衍生物。第三部分 莳萝apiol的合成和Dakin反应的扩展

  摘要：

  DOI：

  10.1039/jr9340001681

文献信息

• Spinochrome synthesis
  作者：I. Singh、R.E. Moore、C.W.J. Chang、R.T. Ogata、P.J. Scheuer

  DOI：10.1016/s0040-4020(01)98704-6

  日期：1968.1

  widely distributed structural pigments of the sea urchins (echinoids) one (spinochrome B) is a derivative of juglone, while four (spinochromes A, C, D, and E) are derivatives of naphthazarin. In addition to the two peri OH groups of naphthazarin these compounds bear one or more β-hydroxyls and/or an acetyl side chain. The synthesis of these four naphthazarin derivatives is described. The naphthalene skeleton

  在海胆的五种广泛分布的结构性颜料（类神经碱）中，一种（螺闪体色素B）是朱古龙的衍生物，而四种（螺闪体色素A，C，D和E）是萘甲萘林的衍生物。除了这两个围萘他沙林的OH基团带有一个或多个β-羟基和/或乙酰基侧链。描述了这四种萘他林衍生物的合成。萘骨架是通过将1,2-二羟基-3,4-二甲氧基苯与氯-或二氯马来酸酐在铝-氯化钠熔体中缩合而构建的。通过用甲醇盐离子的亲核取代氯或通过Thiele方法引入了更多的氧官能团。通过制备无色乙酸酯并将其用乙酸酐-三氟化硼处理，将乙酰基侧链连接至聚羟基萘醌。在加工过程中水解和氧化后，萘扎林体系得以再生。
• 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。
• Late transition metal catalysts for olefin polymerization and oligomerization
  申请人：Cherkasov Kuzunich Vladimir

  公开号：US20060047094A1

  公开（公告）日：2006-03-02

  This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by two or three heteroatoms and at least one heteroatom is nitrogen; X is a substituted or unsubstituted catecholate ligand provided that the substituted catecholate ligand does not contain a 1,2-diketone functionality.

  本发明涉及一种由式LMX所表示的过渡金属化合物，其中M是第3到11族金属，L是一种笨重的双或三齿中性配体，通过两个或三个杂原子与M结合，至少一个杂原子是氮；X是一种取代或未取代的邻二酚配体，但取代的邻二酚配体不含1,2-二酮官能团。
• 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。
• Universal support for nucleic acid synthesis
  申请人：Ngo Nam

  公开号：US20050182241A1

  公开（公告）日：2005-08-18

  Polysubstituted catechol-based universal solid supports suitable for synthesizing oligonucleotides have been prepared. Following synthesis, cleavage of the oligonucleotide from the solid support and catechol-assisted elimination of the 3′-phosphate group is accomplished by treatment with standard basic media such as ammonium hydroxyde or 1 methylamine.

  现已制备出适用于合成寡核苷酸的多取代邻苯二酚基通用固体支持物。合成后，寡核苷酸从固体支持物上裂解，儿茶酚辅助消除 3′-磷酸基团，可通过标准碱性介质（如氢氧化铵或 1 甲胺处理。