利古斯特拉的新型共晶:增强高度和稳定性
Yifei Xie1, Lixiang Gong2, Yue Tao2
1Beijing City Key Laboratory of Drug Target and Screening Research, National Center for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100050, China.
Molecules (Basel, Switzerland)
|May 25, 2024
概括
晶技术增强了Ligustrazine (TMP) 的稳定性,这是Rhizoma Chuanxiong中的活性化合物,用于心血管疾病. 新型共晶体显著降低了吸收水分,并提高了热稳定性.
科学领域:
- 制药科学 制药科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 来自Rhizoma Chuanxiong的ligustrazine (TMP) 对于治疗心血管和脑血管疾病至关重要.
- TMP的临床实用性受到其固有的不稳定性和升华倾向的限制.
- 晶技术提供了一个有前途的策略,以提高药品活性成分的物理化学稳定性.
研究的目的:
- 研究共晶形成在改善利古斯特拉辛 (TMP) 稳定性的潜力.
- 为了合成和描述新型的TMP共晶与精选的酸衍生物.
- 评估共结晶对TMP高度和热性质的影响.
主要方法:
- 利古斯特拉 (TMP) 与P-氨基酸 (PABA),3-氨基酸 (MABA) 和3,5-丁酸 (DNBA) 的联合结晶.
- 共同晶体形成的表征和静态测量 (TMP-PABA (1:2),TMP-MABA (1.5:1),TMP-DNBA (0.5:1)). 在这种情况下,晶体形成的特征是:
- 使用动态蒸汽吸附 (DVS) 和点测定进行光度评估.
主要成果:
- 成功合成了三种新的TMP共晶体.
- 与纯TMP相比,所有共晶体都表现出显著改善的高度稳定性.
- TMP-DNBA共晶体表现出最高的点和卓越的稳定性,这归因于其类似网状的O-HN结结构.
结论:
- 晶形成是提高利古斯特拉辛 (TMP) 稳定性的有效策略.
- TMP-DNBA共晶体在湿透性和热稳定性方面表现出显著的改进.
- 晶体结构,特别是键相互作用,在同晶体内稳定TMP方面发挥着至关重要的作用.
相关概念视频
Complexometric Titration: Ligands
945
Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
945
Complexation Equilibria: Factors Influencing Stability of Complexes
366
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
366
Complexation Equilibria: The Chelate Effect
502
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
502
Crystal Field Theory - Octahedral Complexes
26.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.4K
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
299
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
299
Hydration of Cement
223
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
223


