氨基cyclopropenium作为一个新的结合器官催化剂,用于碳二硫化物和环氧化物的循环添加,以制备循环dithiocarbonate
Xinru Du1, Ziqi Liu2, Zhenjiang Li2
1College of Materials Science and Engineering, Nanjing Tech University 30 Puzhu Road South Nanjing 211816 China xinhu@njtech.edu.cn.
RSC advances
|April 3, 2024
概括
一种新型的氨基cyclopropenium催化剂有效地将环氧化物和二硫化碳转化为循环dithiocarbonates. 这种键有机催化方法在温和条件下提供高产量和选择性.
科学领域:
- 机体催化剂是有机催化剂.
- 绿色化学 绿色化学
- 有机合成 有机合成
背景情况:
- 循环添加反应对于合成异环化合物至关重要.
- 为环氧化物转换开发高效和选择性的催化剂仍然是一个挑战.
- 结合催化为温和和可持续的化学过程提供了一个有希望的途径.
研究的目的:
- 设计和合成一种新的双功能氨基cyclopropenium化物催化剂.
- 研究设计的催化剂在碳二硫化物与环氧化物循环添加中的催化活性.
- 阐明涉及键捐赠和核友性攻击的合作催化机制.
主要方法:
- 合成一个双功能氨基cyclopropenium化物催化剂与diethanolamino替代品.
- 为循环添加反应优化催化剂 (C5·I).
- 使用NMR定位和对照实验对催化机制的表征.
主要成果:
- 催化剂C5·I (diethanolamino) cyclopropenium halide实现了95%的转化率和92%的选择性,用于循环dithiocarbonate的形成.
- 形成了一个混合键供体系统,增强了环氧化物激活和中间稳定.
- 在温和的无溶剂条件下 (25°C,6小时) 成功将11种不同的环氧化物转化为周期性硫酸碳酸盐.
结论:
- 氨基cyclopropenium催化剂为结合器官催化提供了一个有效的工作模型.
- 键供体离子和化物离子的合作作用是催化效率的关键.
- 这种方法提供了一种可持续和有效的途径,用于从环氧化物和二硫化碳中合成循环滴氧碳酸盐.
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