Pyrene-Tagged Ionic Liquids: Separable Organic Catalysts for S<sub>N</sub>2 Fluorination
作者:Abu Taher、Kyo Chul Lee、Hye Ji Han、Dong Wook Kim
DOI:10.1021/acs.orglett.7b01064
日期:2017.7.7
as organic catalysts for the SN2 fluorination using alkalimetalfluoride (MF). In this system, the PIL significantly enhanced the reactivity of MF due to the phase-transfer catalytic effect of the imidazolium moiety as well as the metal cation−π (pyrene) interactions. Furthermore, this homogeneous catalyst PIL was easily separated from the reaction mixture using reduced graphene oxide by π–π stacking
我们制备了pyr取代的咪唑基离子液体(PIL),作为使用碱金属氟化物(MF)进行S N 2氟化的有机催化剂。在该系统中,由于咪唑部分的相转移催化作用以及金属阳离子-π(py)相互作用,PIL显着提高了MF的反应性。此外,这种均相催化剂PIL易于通过还原石墨烯氧化物与PIL的π-π堆积而从反应混合物中分离出来。
Tailor-Made Hexaethylene Glycolic Ionic Liquids as Organic Catalysts for Specific Chemical Reactions
作者:Vinod H. Jadhav、Hwan-Jeong Jeong、Seok Tae Lim、Myung-Hee Sohn、Dong Wook Kim
DOI:10.1021/ol200751e
日期:2011.5.6
Hexaethylene glycol substituted imidazolium based ionicliquids (hexaEGILs) were designed and prepared well-tailored to a specific organic reaction using alkali-metal fluorides (MFs) as multifunctional organic catalysts. These hexaEGIL catalysts could significantly enhance the reactivity of MF, even KF. Furthermore, the hexaEGIL systems showed tremendous efficiency in the nucleophilicfluorination of base-sensitive