syn-2,3-dimethylbutanedioic anhydride

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: syn-2,3-dimethylbutanedioic anhydride
• 英文别名: 4-(3-Carboxy-2-methylbutanoyl)oxy-2,3-dimethyl-4-oxobutanoic acid；4-(3-carboxy-2-methylbutanoyl)oxy-2,3-dimethyl-4-oxobutanoic acid
• 化学式: C₁₂H₁₈O₇
• 分子量: 274.271
• InChiKey: CRGKNWBLYKBKCR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  19
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  118
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  syn-2,3-dimethylbutanedioic anhydride 、 甘草次酸 在 吡啶 、 4-二甲氨基吡啶 作用下， 生成 3b-O-(20,30-Dimethylsuccinyl)-18-b-glycyrrhetinic acid
  参考文献：
  名称：

  Synthesis and proteasome inhibition of glycyrrhetinic acid derivatives

  摘要：

  This study discovered that glycyrrhetinic acid inhibited the human 20S proteasome at 22.3 mu M. Esterification of the C-3 hydroxyl group on glycyrrhetinic acid with various carboxylic acid reagents yielded a series of analogs with marked improved potency. Among the derivatives, glycyrrhetinic acid 3-O-isophthalate (17) was the most potent compound with IC50 of 0.22 mu M, which was approximately 100-fold more potent than glycyrrhetinic acid. (c) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.05.078

文献信息

• Process for producing aromatic polyesters having an increased degree of polymerisation, these aromatic polyesters, process for producing molded articles composed thereof, and these molded articles
  申请人：TEIJIN LIMITED

  公开号：EP0020944A1

  公开（公告）日：1981-01-07

  A process for producing an aromatic polyester having an increased degree of polymerization, which comprises reacting a substantially linear, fiber forming aromatic polyester containing terminal carboxyl groups and having an aromatic dicarboxylic acid as a main acid component at an elevated temperature with a bis-cyclic imino ether compound of the formula (I) such as 2,2'-bis(2-oxazoline), 2,2'--bis(5,6-dihydro-4H-1,3-oxazine) thereby bonding the molecular chains of the aromatic polyester to each other by the terminal carboxyl groups thereof to rapidly form said aromatic polyester having and increased degree of polymerization. Said reaction can be carried out under atmospheric or elevated pressure. According to the process, an aromatic polyester having a low terminal carboxyl concentration and an increased degree of polymerization can be obtained. n =0 or 1; X1 and X2 typically are -CH2-CH2- or -CH2-CH2-CH2-: R1 and R2 typically are hydrogen or a monovalent hydrocarbon group; D typically is a divalent hydrocarbon group, e.g. ethylene, propylene, butylene.

  一种提高聚合度的芳香族聚酯的生产工艺，包括在高温下将含有末端羧基并以芳香族二羧酸为主要酸组分的基本线性、可形成纤维的芳香族聚酯与式 (I) 的双环亚胺醚化合物（如 2、2'-双（2-噁唑啉）、2,2'-双（5,6-二氢-4H-1,3-噁嗪），从而使芳香族聚酯的分子链通过其末端羧基相互键合，快速形成聚合度更高的芳香族聚酯。 所述反应可在常压或高压下进行。 根据该工艺，可以获得具有低端羧基浓度和更高聚合度的芳香族聚酯。 n =0 或 1； X1 和 X2 通常为-CH2-CH2-或-CH2-CH2-CH2-： R1 和 R2 通常是氢或一价烃基； D 通常是二价烃基，如乙烯、丙烯、丁烯。
• Synthesis and proteasome inhibition of lithocholic acid derivatives
  作者：Zhao Dang、Andrew Lin、Phong Ho、Dominique Soroka、Kuo-Hsiung Lee、Li Huang、Chin-Ho Chen

  DOI：10.1016/j.bmcl.2011.02.041

  日期：2011.4

  A new class of proteasome inhibitors was synthesized using lithocholic acid as a scaffold. Modification at the C-3 position of lithocholic acid with a series of acid acyl groups yielded compounds with a range of potency on proteasome inhibition. Among them, the phenylene diacetic acid hemiester derivative (13) displayed the most potent proteasome inhibition with IC50 = 1.9 mu M. Enzyme kinetic analysis indicates that these lithocholic acid derivatives are noncompetitive inhibitors of the proteasome. (C) 2011 Elsevier Ltd. All rights reserved.
• US4152170A
  申请人：——

  公开号：US4152170A

  公开（公告）日：1979-05-01
• US4331800A
  申请人：——

  公开号：US4331800A

  公开（公告）日：1982-05-25
• Synthesis and proteasome inhibition of glycyrrhetinic acid derivatives
  作者：Li Huang、Donglei Yu、Phong Ho、Keduo Qian、Kuo-Hsiung Lee、Chin-Ho Chen

  DOI：10.1016/j.bmc.2008.05.078

  日期：2008.7

  This study discovered that glycyrrhetinic acid inhibited the human 20S proteasome at 22.3 mu M. Esterification of the C-3 hydroxyl group on glycyrrhetinic acid with various carboxylic acid reagents yielded a series of analogs with marked improved potency. Among the derivatives, glycyrrhetinic acid 3-O-isophthalate (17) was the most potent compound with IC50 of 0.22 mu M, which was approximately 100-fold more potent than glycyrrhetinic acid. (c) 2008 Elsevier Ltd. All rights reserved.