异质核二维NMR用于定量Candesartan Cilexetil的量化
Veera Reddy Pinninti1, C H Krishnam Raju1, Arunima Pola1
1United States Pharmacopeia India Pvt Ltd, Hyderabad, Telangana, India.
Magnetic resonance in chemistry : MRC
|September 12, 2025
概括
使用H-C的二维定量NMR (2D qNMR) 增强了复杂药物化合物的量化. 这种先进的NMR方法克服了1D qNMR的局限性,可以准确地确定纯度和样品重量.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 核磁共振 (NMR) 是一种核磁共振技术.
背景情况:
- 一维定量NMR (1D qNMR) 广泛用于制药量化,但面临复杂分子的局限性.
- 1D qNMR的挑战包括H NMR的信号重叠,C NMR的长时间获取,以及19F或31P NMR中没有合适的核.
- 1D qNMR中的光谱复杂性和重叠的峰值阻碍了准确的整合和量化,导致潜在的测量错误.
研究的目的:
- 建立和应用一个二维 (2D) 的NMR方法,用于对复杂分子的定量分析.
- 克服1D qNMR在量化具有复杂光谱图案的化合物的局限性.
- 为了证明2D qNMR对药物化合物的精确纯度和样品重量确定的实用性.
主要方法:
- 开发和应用2D H-C 异质核单量子相干 (HSQC) 光谱方法用于定量NMR (qNMR).
- 使用已建立的2D H- 13 C HSQC实验对坎德沙坦基莱克塞蒂尔进行定量分析.
- 通过评估测量和实际样本重量之间的相关性来验证方法.
主要成果:
- 2D H-C HSQC 核磁共振方法使得坎德沙坦基莱克塞蒂尔的精确定量分析成为可能,即使具有复杂的光谱图案.
- 在使用2D qNMR方法时,观察到测量和实际样本重量之间存在很强的相关性.
- 该研究证实了使用先进的2DNMR技术测量纯度和样品重量的准确性.
结论:
- 先进的NMR方法,特别是2D qNMR,对于精确量化复杂分子是有效的.
- 2D H-C HSQC 方法为克服 1D qNMR 的局限性提供了一个可行的替代方案.
- 这些先进的2D qNMR技术可以扩展到其他复杂的分子,并且可以适应低场基板仪器.
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