5,6-Dimethyl-2,3-pyrazindicarbonsaeure | 41110-52-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 5,6-Dimethyl-2,3-pyrazindicarbonsaeure
• 英文别名: 5,6-Dimethylpyrazine-2,3-dicarboxylic acid
• CAS: 41110-52-5
• 化学式: C₈H₈N₂O₄
• mdl: MFCD03161171
• 分子量: 196.163
• InChiKey: CEHPKLRUCVRKFF-UHFFFAOYSA-N

物化性质

• 熔点：
  200 °C
• 沸点：
  440.9±45.0 °C(Predicted)
• 密度：
  1.469±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.3
• 重原子数：
  14
• 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：
  100
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  5,6-Dimethyl-2,3-pyrazindicarbonsaeure 以 溶剂黄146 为溶剂， 反应 1.0h， 生成 2,3-二甲基吡嗪
  参考文献：
  名称：

  Heyns, Kurt; Behse, Ernst; Francke, Wittko, Chemische Berichte, 1981, vol. 114, # 1, p. 240 - 245

  摘要：

  DOI：
• 作为产物：
  描述：

  2,3-二甲基喹喔啉 在 potassium permanganate 作用下， 反应 1.0h， 以64%的产率得到5,6-Dimethyl-2,3-pyrazindicarbonsaeure
  参考文献：
  名称：

  2,3,5,6-吡嗪四甲酸二水合物中非常短的 O-H···O 氢键的变温中子衍射分析：合成子辅助的多中心阵列中的短 O酸-H···O 水氢键

  摘要：

  非常短的 OH···O 氢键 (O···O = 2.2-2.5 A) 通常发生在氢键被负电荷或正电荷稳定时 (OH···O-, O+H··· O) 或通过共振辅助 (···OCCCOH···)。我们通过变温中子衍射（O···O = 2.4751(11)、2.4765(10)、2.4807(12) 和2.4906(16) A 在 20、100、200 和 293 K)。COOH供体通过π-协同氢键(OacidH···OCacid)活化，水受体能力通过极化辅助(σ-协同，OwH···Oacid，OwH···Npyrazine)增强。在 20-293 K 温度范围内没有质子迁移产生离子或互变异构体形式排除了 1 中电荷或共振辅助 H 键的贡献。

  DOI：

  10.1021/jp0476848

文献信息

• Aluminum Metal Organic Framework Materials
  申请人：TEXAS A&M UNIVERSITY SYSTEM

  公开号：US20150152123A1

  公开（公告）日：2015-06-04

  The invention relates to monocrystalline single crystals of metal-organic framework materials comprising at least one aluminium metal ion, processes for preparing the same, methods for employing the same, and the use thereof. The invention also relates to monocrystalline aluminium metal-organic frameworks.

  该发明涉及至少含有一种铝金属离子的金属-有机框架材料的单晶单晶体，以及其制备方法、使用方法和用途。该发明还涉及单晶铝金属-有机框架。
• COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A POLYMER BEARING JUNCTION GROUPS, AND COSMETIC TREATMENT PROCESS
  申请人：Chodorowski-Kimmes Sandrine

  公开号：US20100239509A1

  公开（公告）日：2010-09-23

  The present patent application relates to a cosmetic or dermatological composition comprising, in a cosmetically or dermatologically acceptable medium, a polymer comprising: (a) a polymer backbone that may be obtained by reaction: of a polyol comprising 3 to 6 hydroxyl groups; of a monocarboxylic acid containing 6 to 32 carbon atoms; of a polycarboxylic acid comprising at least two carboxylic groups COOH, and/or of a cyclic anhydride such as a polycarboxylic acid and/or of a lactone comprising at least one carboxylic group COOH; and (b) at least one junction group linked to the said polymer backbone and capable of establishing H bonds with one or more partner junction groups, each pairing of a junction group involving at least three H (hydrogen) bonds. The patent application also concerns a cosmetic treatment process using the said composition.

  本专利申请涉及一种化妆品或皮肤科学组合物，包括在化妆品或皮肤科学上可接受的介质中，包含以下聚合物的组合物：(a) 由以下反应得到的聚合物骨架：含有3至6个羟基的多元醇；含有6至32个碳原子的一元羧酸；至少含有两个羧基COOH的多元羧酸，和/或类似多元羧酸的环酐和/或至少含有一个羧基COOH的内酯；以及(b) 至少一个连接到所述聚合物骨架的连接基团，并能够与一个或多个配对连接基团建立H键，每个连接基团的配对涉及至少三个H（氢）键。该专利申请还涉及使用所述组合物的化妆品处理过程。
• COMPOSITION COMPRISING A POLYCONDENSATE, METHOD OF TREATMENT, POLYCONDENSATE, AND METHOD OF PREPARATION
  申请人：GIUSTINIANI Pascal

  公开号：US20090028807A1

  公开（公告）日：2009-01-29

  The present application relates to a cosmetic or pharmaceutical, in particular lipstick, composition comprising a polycondensate The application also relates to a method of cosmetic treatment using the composition, the polycondensate thus defined and a method of preparing the polycondensate.

  本申请涉及一种化妆品或药用品，特别是口红，包括聚缩酸酯的组合物。该申请还涉及一种使用该组合物进行化妆处理的方法，所述聚缩酸酯的定义以及一种制备聚缩酸酯的方法。
• COSMETIC OR PHARMACEUTICAL COMPOSITION COMPRISING A POLYCONDENSATE, THE SAID POLYCONDENSATE AND METHOD OF COSMETIC TREATMENT
  申请人：Malle Gerard

  公开号：US20100272660A1

  公开（公告）日：2010-10-28

  The present application relates to a cosmetic or pharmaceutical composition comprising a polycondensate capable of being obtained by the reaction of the following monomers alone: of 10 to 30% by weight, relative to the total weight of the polycondensate, of one or more polyols comprising 3 to 6 hydroxyl groups; of 30 to 80% by weight, relative to the total weight of the polycondensate, of one or more linear, branched and/or cyclic, saturated or unsaturated, non-aromatic monocarboxylic acids comprising 6 to 32 carbon atoms; of 1 to 40% by weight, relative to the total weight of the polycondensate, of one or more polycarboxylic acids and/or cyclic anhydrides of such a polycarboxylic acid and/or lactones comprising at least one COOH group; and optionally of 0.1 to 15% by weight, relative to the total weight of the polycondensate, of one or more silicones having a hydroxyl and/or carboxyl functional group. The application also relates to a method of cosmetic treatment using the said composition, and the polycondensate thus defined.

  本申请涉及一种化妆品或药用组合物，包括由以下单体反应而得的聚缩酸酯：相对于聚缩酸酯的总重量，占10至30%的一种或多种含有3至6个羟基的多元醇；占30至80%的一种或多种线性、支链和/或环状、饱和或不饱和、非芳香族的单羧酸，含有6至32个碳原子；占聚缩酸酯总重量的1至40%的一种或多种多羧酸和/或多羧酸的环状酐和/或含有至少一个COOH基团的内酯；以及可选地占聚缩酸酯总重量的0.1至15%的一种或多种硅氧烷，具有羟基和/或羧基官能团。该申请还涉及使用所述组合物进行化妆处理的方法，以及如此定义的聚缩酸酯。
• [EN] Chromium Metal Organic Frameworks and Synthesis of Metal Organic Frameworks<br/>[FR] STRUCTURES ORGANOMÉTALLIQUES À BASE DE CHROME ET SYNTHÈSE DE STRUCTURES ORGANOMÉTALLIQUES
  申请人：TEXAS A & M UNIV SYS

  公开号：WO2015173553A1

  公开（公告）日：2015-11-19

  The present invention relates to monocrystalline metal organic frameworks comprising chromium ions and carboxylate ligands and the use of the same, for example their use for storing a gas. The invention also relates to methods for preparing metal organic frameworks comprising chromium, titanium or iron ions and carboxylate ligands. The methods of the invention allow such metal organic frameworks to be prepared in monocrystalline or polycrystalline forms.

  本发明涉及含有铬离子和羧酸配体的单晶金属有机框架，以及其用途，例如用于储存气体。该发明还涉及制备含有铬、钛或铁离子和羧酸配体的金属有机框架的方法。本发明的方法允许制备这些金属有机框架以单晶或多晶形式存在。