Tuning the chemoselective hydrogenation of aromatic ketones, aromatic aldehydes and quinolines catalyzed by phosphine functionalized ionic liquid stabilized ruthenium nanoparticles
作者:He-yan Jiang、Xu-xu Zheng
DOI:10.1039/c5cy00293a
日期:——
Rutheniumnanoparticles (Ru NPs) stabilized by phosphine-functionalized ionic liquids (PFILs) were synthesized in an imidazolium-based ionic liquid using H2 as a reductant. Characterization showed well-dispersed particles of about 2.2 nm (TEM) and confirmed the PFIL stabilization of the Ru NPs (NMR). The Ru NPs stabilized by PFILs exhibited excellent activity and switchable chemoselectivity in the
Highly Selective Hydrogenation with Ionic Liquid Stabilized Nickel Nanoparticles
作者:He-yan Jiang、Si-shi Zhang、Bin Sun
DOI:10.1007/s10562-018-2361-0
日期:2018.5
Nickel nanoparticles (Ni NPs) were conveniently synthesized from the reduction of nickel(II) salt with NaBH4 or hydrazine in the presence of the ionic liquid 1-butyl-2,3-dimethylimidazolium (S)-2-pyrrolidinecarboxylic acid salt. UV/Vis spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy were employed to characterize the interaction between the metal and the ionic liquid.
在离子液体 1-丁基-2,3-二甲基咪唑鎓(S)-2-吡咯烷羧酸盐存在下,通过用 NaBH4 或肼还原镍(II)盐,方便地合成镍纳米颗粒(Ni NPs)。紫外/可见光谱、热重分析和 X 射线光电子能谱被用来表征金属和离子液体之间的相互作用。Ni NPs(0) 的面心立方结构通过 X 射线衍射表征得到证实。透射电子显微镜图像显示平均直径约为 5.1 nm 的分散良好的 Ni 颗粒。在温和的反应条件下,离子液体固定的 Ni NPs 被用作高效催化剂,用于喹啉和相关化合物以及芳香硝基化合物的化学选择性加氢。
Titanium(III)-Oxo Clusters in a Metal–Organic Framework Support Single-Site Co(II)-Hydride Catalysts for Arene Hydrogenation
作者:Pengfei Ji、Yang Song、Tasha Drake、Samuel S. Veroneau、Zekai Lin、Xiandao Pan、Wenbin Lin
DOI:10.1021/jacs.7b11241
日期:2018.1.10
clusters for supporting single-sitecatalysts. Herein we report that the Ti8(μ2-O)8(μ2-OH)4 node of the Ti-BDC MOF (MIL-125) provides a single-site model of the classical TiO2 support to enable CoII-hydride-catalyzed arenehydrogenation. The catalytic activity of the supported CoII-hydride is strongly dependent on the reduction of the Ti-oxo cluster, definitively proving the pivotal role of TiIII in the performance
multi-directional superb chemoselectivity to aromatic amines, alicyclic amines as well as N-alkyl aliphatic amines could be achieved with excellent catalytic activity and recyclability by tuning reaction conditions over 5wt%Ru/LDH-2. Additionally, this catalytic system also exhibited attractive activity and multi-directional chemoselectivity in the hydrogenation of quinoline and its derivatives with solvents
The present invention relates to new CGRP-antagonists of general formula I
wherein U, V, X, Y, R
1
, R
2
, R
3
and R
4
are defined as mentioned in the description, the tautomers thereof, the isomers thereof, the diastereomers thereof, the enantiomers thereof, the hydrates thereof, the mixtures thereof and the salts thereof as well as the hydrates of the salts, particularly the physiologically acceptable salts thereof with inorganic or organic acids or bases, medicaments containing these compounds, the use thereof and processes for the preparation thereof.