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疏水性B ((C₆F₅) ₃@R₄-MIL-101:一种耐水性异质催化剂,用于挫败的易斯对-中介的减少性氨基化

Miaomiao Chen¹, Huili Zhao¹, Han Xue¹

¹School of Chemistry, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, PR China.

Inorganic chemistry

|March 24, 2025

概括

基于三 (pentafluorophenyl) (B) (C6F5) 3) 的丧的易斯对 (FLP) 在无金属催化中表现有前途. 一个新的疏水催化剂,B(C6F5)3@R4-MIL-101,克服了水的敏感性,以有效的还原性氨化.

科学领域:

有机金属化学有机金属化学
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:

基于三 (pentafluorophenyl) (B) (C6F5) 3) 的挫败的易斯对 (FLP) 在无金属催化还原中有效.
B(C6F5) 3对水的高度亲和力导致不可逆转的中毒,限制了其在还原性氨基化中的使用.
开发耐水催化剂对于扩大FLP应用至关重要.

研究的目的:

设计一种基于B(C6F5) 3的疏水催化剂,限制在改性金属有机框架 (MOF) 中.
为了研究基链长度对催化剂水性和减少性氨化中的性能的影响.
使用异质FLP催化剂,在水的存在下实现还原性氨基化反应.

主要方法:

通过将B(C6F5) 3限制在基修饰的MIL-101 MOF中,合成B(C6F5) 3@R_n-MIL-101 (n = 3,5,7).
通过改变基链 (n) 的长度来调整催化剂的疏水性.
评估改性MOFs在化物/质与湿溶剂中的氨基的还原性氨基化中的催化活性.

主要成果:

催化剂的疏水性和B(C6F5) 3负荷取决于基链的长度.
短链 (n=3) 对于疏水性是不够的;长链 (n=7) 阻碍了B(C6F5) 3的负载.
B(C6F5)3@R4-MIL-101催化剂 (n=5) 在湿溶剂中证明了有效的还原性氨化.

结论:

将B(C6F5) 3限制在疏水性MOF中,产生一种耐水性的异质催化剂.
基链长度对于优化催化剂性能和疏水性至关重要.
这一战略推动了FLP化学的发展,并为还原性氨化催化提供了一种新的方法.

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