4,4-二甲基-3,5-吡唑啉二酮 | 29005-43-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑烷类
• 中文名称: 4,4-二甲基-3,5-吡唑啉二酮
• 英文名称: 4,4-dimethylpyrazolidine-3,5-dione
• 英文别名: 4,4-Dimethyl-3,5-pyrazolidindion；4,4-dimethyl-pyrazolidine-3,5-dione；4,4-dimethyl-3,5-dioxo-pyrazolidine；4.4-Dimethyl-3.5-dioxo-pyrazolidin；4,4-Dimethyl-pyrazolidindion-3,5；N,N'-Dimethylmalonyl-hydrazin
• CAS: 29005-43-4
• 化学式: C₅H₈N₂O₂
• 分子量: 128.131
• InChiKey: PGBXZDDHDXRVAV-UHFFFAOYSA-N

物化性质

• 熔点：
  257-259 °C(Solv: acetone (67-64-1))
• 密度：
  1.142±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.1
• 重原子数：
  9
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  58.2
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4,4-二甲基-3,5-吡唑啉二酮 在 乙酸酐 作用下， 以 溶剂黄146 为溶剂， 反应 27.0h， 生成 Dimethylsulfonium-(7,7-dimethyl-2,4,6,8-tetraoxo-1,5-diazabicyclo<3.3.0>octan-3-ylid)
  参考文献：
  名称：

  1,5-二氮杂双环 [3.3.0] 辛烷-2,4,6,8-四子体领域的新研究，包括未取代母体化合物的晶体结构测定

  摘要：

  未被取代的 3,5-吡唑烷二酮 (1) 成为了单物质。1,5-二氮杂双环 [3.3.0] 辛烷-2,4,6,8-四氢呋喃及其非物质的代表。根化合物 5 可访问。除了通常的分析方法外，还通过在两个活性 (CH2) 基团上反应和确定晶体结构来初步验证结构。除 H 原子外，分子在 2 pm 内是平面的，并且作为一个整体具有本征对称性 2 / m-C2h。键长为 N - N 141.4 (2)、N - C 139.1 (1)、C - C 150.9 (1) 和 C - O 120.1 (1) pm。

  DOI：

  10.1002/ardp.19863190714
• 作为产物：
  描述：

  二甲基丙二酸二乙酯 在 sodium ethanolate 、 肼 作用下， 以 乙醇 为溶剂， 反应 0.5h， 生成 4,4-二甲基-3,5-吡唑啉二酮
  参考文献：
  名称：

  Proton-transfer chemistry of urazoles and related imides, amides, and diacyl hydrazides

  摘要：

  Equilibrium acidity constants have been determined for 1,2,4-triazolidine-3,5-dione (urazole), several substituted urazoles, and other related acids, in both dimethyl sulfoxide (DMSO) and aqueous solution. In DMSO, urazole has a pK(a) of 13.1. In water, urazole has a pK(a) of 5.8. In general, N-methyl and N-phenyl substituents are found to acidify the urazole moiety, in both DMSO and water. The acidifying effects of these substituents are attenuated by a factor of 3.3 in water. The solvent effects are ascribed to the aqueous stabilization of urazole anions via hydrogen-bonding interactions and the aqueous-promoted relief of lone pair-lone pair electronic interactions that manifest themselves upon deprotonation of a hydrazyl proton in 1 and related species. That a hydrazyl proton in 1 is at least as acidic as the imide proton in 1 is comparison of C-13 NMR spectra for the urazoles and related nitrogen acids with C-13 spectra for the conjugate bases derived from these species. Upon loss of an imide proton, in both DMSO-d6 and D2O solutions, carbonyl carbon atoms present in succinimide as well as appropriately substituted urazoles and hydantoins experience substantial (13-17 ppm) downfield shifts. In contrast, deprotonation of 4-substituted and 1,4-substituted urazoles, 4,4-dimethylpyrazolidine-3,5-dione, and diacetylhydrazine (species that contain hydrazyl acidic protons) results in shifts in the positions of the carbonyl resonances that range from 5 ppm upfield to 3 ppm downfield. Deprotonation of species containing both imide and hydrazyl protons (i.e., urazole and 1-substituted urazoles) results in shifts in the carbonyl carbon resonances consistent with hydrazyl proton removal. Comparison of DMSO-phase pK(a)'s for acetamide (25.5), diacetylhydrazine (16.7), 4,4-dimethylpyrazolidine-3,5-dione (13.5), and urazole (13.5), and urazole (13.1) suggest that the remarkable acidity of the hydrazyl proton in urazole and substituted urazoles is due mainly to its cyclic diacyl hydrazide structure.

  DOI：

  10.1021/jo00019a034

文献信息

• Anti-inflammatory medicaments
  申请人：Flynn L. Daniel

  公开号：US20050288286A1

  公开（公告）日：2005-12-29

  Novel compounds and methods of using those compounds for the treatment of inflammatory conditions are provided. In a preferred embodiment, modulation of the activation state of p38 kinase protein comprises the step of contacting the kinase protein with the novel compounds.

  提供了用于治疗炎症性疾病的新化合物和使用这些化合物的方法。在一个首选实施例中，调节p38激酶蛋白的活化状态包括将该激酶蛋白与新化合物接触的步骤。
• MODULATION OF PROTEIN FUNCTIONALITIES
  申请人：Flynn Daniel L.

  公开号：US20080248548A1

  公开（公告）日：2008-10-09

  New methods for the rational identification of molecules capable of interacting with specific naturally occurring proteins are provided, in order to yield new pharmacologically important compounds and treatment modalities. Broadly, the method comprises the steps of identifying a switch control ligand forming a part of a particular protein of interest, and also identifying a complemental switch control pocket forming a part of the protein and which interacts with said switch control ligand. The ligand interacts in vivo with the pocket to regulate the conformation and biological activity of the protein such that the protein assumes a first conformation and a first biological activity upon the ligand-pocket interaction, and assumes a second, different conformation and biological activity in the absence of the ligand-pocket interaction. Next, respective samples of said protein in the first and second conformations are provided, and these are screened against one or more candidate molecules by contacting the molecules and the samples. Thereupon, small molecules which bind with the protein at the region of the pocket may be identified. Novel protein-modulator adducts and methods of altering protein activity are also provided.

  提供了一种新的方法，用于理性地识别能够与特定天然蛋白质相互作用的分子，以产生新的在药理学上重要的化合物和治疗方式。广义上，该方法包括以下步骤：识别构成感兴趣特定蛋白质一部分的开关控制配体，同时识别构成该蛋白质一部分并与该开关控制配体相互作用的互补开关控制口袋。该配体在体内与口袋相互作用，以调节蛋白质的构象和生物活性，使得蛋白质在配体-口袋相互作用时呈现第一构象和第一生物活性，并在缺乏配体-口袋相互作用时呈现第二不同构象和生物活性。接下来，提供了处于第一和第二构象的蛋白质的各自样本，并通过接触分子和样本对这些样本进行筛选。然后，可以识别与口袋区域的蛋白质结合的小分子。还提供了新颖的蛋白质调节剂加合物和改变蛋白质活性的方法。
• Zinner; Boese, Pharmazie, 1970, vol. 25, # 5, p. 309 - 312
  作者：Zinner、Boese

  DOI：——

  日期：——
• (1R,2R)-4,4-Dimethylpyrazolidine-3,5-dione-α-D-pyranosyl-2-deoxyriboside
  作者：V. M. Kolb、P. A. Colloton、P. D. Robinson、H. G. Lutfi、C. Y. Meyers

  DOI：10.1107/s0108270196004416

  日期：1996.7.15

  The first example of a crystalline pyrazolidinedione nucleoside has been synthesized from the reaction of 2-deoxy-D-ribose with 4,4-dimethylpyrazolidine-3,5-dione and characterized by X-ray crystallography as a single alpha-pyranoside diastereomer [IUPAC name: 1-(2-deoxy-alpha-D-erythro-pentopyranosyl) 1(R),2(R)-4,4-dimethylpyrazolidine-3,5-dione], C10H16N2O5. Although the pyrazolidinedione ring is essentially planar, the two hydrazidic N atoms are pyramidal and chiral, their respective pyranosyl and H-atom substituents being trans-R,R configured. The intermolecular hydrogen bonding involves pyranose-pyranose and pyranose-pyrazolidinedione interactions. Each molecule is linked via six hydrogen bonds to four surrounding molecules in which the pyrazolidinedione hydrazidic N(H) atom is a donor and its adjacent carbonyl O atom is an acceptor, and the pyranose hydroxylic O atoms are donors as well as accepters. The second carbonyl O atom has no hydrogen-bonding interactions with OH or NH, but exhibits a weak C-H ... O intermolecular interaction with the pyranose ring. The pyranose ring O atom does not participate in hydrogen bonding. Substituting the OH groups with OD and the NH with ND resulted in no measurable changes in the structure (within error), including the hydrogen-bonding parameters.
• Proton-transfer chemistry of urazoles and related imides, amides, and diacyl hydrazides
  作者：M. J. Bausch、B. David、P. Dobrowolski、C. Guadalupe-Fasano、R. Gostowski、D. Selmarten、V. Prasad、A. Vaughn、L. H. Wang

  DOI：10.1021/jo00019a034

  日期：1991.9

  Equilibrium acidity constants have been determined for 1,2,4-triazolidine-3,5-dione (urazole), several substituted urazoles, and other related acids, in both dimethyl sulfoxide (DMSO) and aqueous solution. In DMSO, urazole has a pK(a) of 13.1. In water, urazole has a pK(a) of 5.8. In general, N-methyl and N-phenyl substituents are found to acidify the urazole moiety, in both DMSO and water. The acidifying effects of these substituents are attenuated by a factor of 3.3 in water. The solvent effects are ascribed to the aqueous stabilization of urazole anions via hydrogen-bonding interactions and the aqueous-promoted relief of lone pair-lone pair electronic interactions that manifest themselves upon deprotonation of a hydrazyl proton in 1 and related species. That a hydrazyl proton in 1 is at least as acidic as the imide proton in 1 is comparison of C-13 NMR spectra for the urazoles and related nitrogen acids with C-13 spectra for the conjugate bases derived from these species. Upon loss of an imide proton, in both DMSO-d6 and D2O solutions, carbonyl carbon atoms present in succinimide as well as appropriately substituted urazoles and hydantoins experience substantial (13-17 ppm) downfield shifts. In contrast, deprotonation of 4-substituted and 1,4-substituted urazoles, 4,4-dimethylpyrazolidine-3,5-dione, and diacetylhydrazine (species that contain hydrazyl acidic protons) results in shifts in the positions of the carbonyl resonances that range from 5 ppm upfield to 3 ppm downfield. Deprotonation of species containing both imide and hydrazyl protons (i.e., urazole and 1-substituted urazoles) results in shifts in the carbonyl carbon resonances consistent with hydrazyl proton removal. Comparison of DMSO-phase pK(a)'s for acetamide (25.5), diacetylhydrazine (16.7), 4,4-dimethylpyrazolidine-3,5-dione (13.5), and urazole (13.5), and urazole (13.1) suggest that the remarkable acidity of the hydrazyl proton in urazole and substituted urazoles is due mainly to its cyclic diacyl hydrazide structure.