基于密度功能研究的思普拉丁及其类型的水解理论
1State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, Nanjing University, Nanjing 210093, P. R. China.
Journal of the American Chemical Society
|September 20, 2001
概括
作为一种关键的抗癌药物西斯的水解涉及到详细的S(N) 2机制. 了解溶剂对其结构和反应性的影响对于设计新的基于的癌症疗法至关重要.
科学领域:
- 计算化学计算化学
- 药用化学 医学化学
- 量子化学 是一个量子化学.
背景情况:
- 西斯是一种广泛使用的抗癌药物,其水解被认为是关键的激活步骤.
- 需要准确的理论模型来理解正方形平面Pt(II) 复合物的水解机制.
- 之前的研究缺乏对水解途径的全面了解,特别是考虑到溶剂效应.
研究的目的:
- 阐明西斯和相关的Pt (II) 复合物的详细水解机制.
- 研究溶剂对水解路径和反应能量的影响.
- 为设计基于的新型抗癌剂提供理论指导.
主要方法:
- 使用各种基础集的DFT方法 (mPW1PW91/SDD) 进行全面的理论研究.
- 在S(N) 2水解路径中对五种静止状态 (R,I1,TS,I2,P) 的表征.
- 分析结构和原子电荷变化,吉布斯自由能量,和变化.
主要成果:
- 在水解S(N) 2路径中,所有五种静态状态的第一个理论表征.
- 在三角形-双金字塔介质的赤道平面上观察到显著的结构和电荷变化.
- 计算的反应参数 (,) 与实验数据有很好的一致性;溶剂效应对于准确性至关重要.
结论:
- 西斯的水解遵循典型的S(N) 2机制,具有可识别的中间体和过渡状态.
- 溶剂的影响显著影响水解机制和分子几何学,特别是在赤道平面.
- 这些发现为开发更有效的基抗癌药物提供了宝贵的理论见解.
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