基于聚氧甲酸盐的离子液体:高效的可逆相变型催化剂,用于硫化醇,以构建C-S键
Jikun Li1, Junwei Ma2, Chuanping Wei1
1College of Chemistry and Chemical Engineering, Taishan University, Tai'an, 271021, Shandong, P. R. China. hanyf1978@163.com.
Dalton transactions (Cambridge, England : 2003)
|February 13, 2024
概括
新的基于聚氧甲酸盐的离子液体 (POM-ILs-SO3H) 有效地催化酒精的硫化,形成硫乙烯. 这种新的催化系统表现出高产量,广泛的基质范围和出色的可回收性,提供了一条更绿色的合成路线.
科学领域:
- 有机合成 有机合成
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
背景情况:
- 硫乙烯是天然产品和有机合成中的关键组成部分.
- 开发高效和可持续的乙烯合成方法具有显著的兴趣.
研究的目的:
- 合成基于聚氧甲酸盐的新型离子液体 (POM-ILs-SO3H) 用于催化酒精的硫化.
- 调查开发的POM-ILs-SO3H催化剂的催化活性,基质范围和可回收性.
- 为化过程提出反应机制.
主要方法:
- 合成由N-基伊米达衍生的POM-ILs-SO3H.
- 各种醇与使用合成的催化剂的 thiols 的 thiolation 反应.
- 反应条件 (温度,时间,催化剂结构) 的优化.
- 催化剂的可回收性研究.
主要成果:
- 实现了高的催化活性,在70°C下,在1小时内获得高达98%的铁产量.
- 伊米达的基链长度影响了催化剂的可溶性和活性.
- 催化系统证明了广泛的基质范围,有效用于二级和三级醇与各种醇.
- 一种特定的催化剂[PIMPS]3PW12O40在5次运行中显示出高活性和良好的可回收性.
结论:
- 新型POM-ILs-SO3H催化剂对通过酒精化合成基乙烯有效.
- 催化剂的性能可以通过修改基链长度来调整.
- 可逆相变催化剂提供了同质和异质系统的优势.
- 对于化反应,提出了一种碳酸化机制.
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