强键捐赠溶剂加速帕塞里尼三组分反应
Claudio Ferdeghini1, Minghui Wu1, Prabhat Ranjan1
1Biobased Organic Chemistry, Aachen-Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, Urmonderbaan 22, Geleen 6167RD, The Netherlands.
The Journal of organic chemistry
|April 3, 2025
概括
添加六异醇 (HFIP) 作为辅溶剂显著提高了帕塞里尼反应 (P-3CR) 的速度,即使与键捐赠酒精. 这一发现为优化P-3CR反应提供了新的策略.
科学领域:
- 有机化学 有机化学
- 反应动力学反应动力学
背景情况:
- 帕塞里尼反应 (P-3CR) 是有机合成中的一个关键的多元组分反应.
- 酒精溶剂通常会阻碍P-3CR,因为在确定速率的步骤中增加了能量障碍.
研究的目的:
- 为了研究1,1,1,3,3,3-hexafluoroisopropanol (HFIP) 作为辅溶剂对P-3CR率的影响.
- 阐明观察到的速率提升的机制基础.
主要方法:
- 实验动力学研究.
- 密度函数理论 (DFT) 的计算.
- 基质范围调查. 基质范围调查.
主要成果:
- 当使用HFIP作为大多数近距离有机溶剂中的辅溶剂时,观察到P-3CR的显著速率提升.
- 即使使用强键捐赠 (HBD) 酒精,也普遍观察到速率的提高.
- 像DMF这样的强键接受 (HBA) 溶剂没有显示增速.
- 基质范围显示P-3CR的整体产量略有增加.
结论:
- HFIP作为一种有效的辅溶剂来加速P-3CR,与酒精的典型作用相反.
- 机械的理由涉及到特定的相互作用,降低速度决定步骤的激活能量.
- 这一发现为优化P-3CR反应效率提供了一种有价值的方法.
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