2052-06-4Relevant articles and documents
Highly Active Ni Nanoparticles on N-doped Mesoporous Carbon with Tunable Selectivity for the One-Pot Transfer Hydroalkylation of Nitroarenes with EtOH in the Absence of H2
Tao, Yuewen,Nie, Yunqing,Hu, Haitao,Wang, Ke,Chen, Yi,Nie, Renfeng,Wang, Jianshe,Lu, Tianliang,Zhang, Yongsheng,Xu, Chunbao Charles
, p. 4243 - 4250 (2021/08/20)
Cost-effective and environmentally friendly conversion of nitroarenes into value-added products is desirable but still challenging. In this work, highly dispersed Ni nanoparticles (NPs) supported on N-doped mesoporous carbon (Ni/NC-x) were synthesized via novel ion exchange-pyrolysis strategy. Their catalytic performance was investigated for one-pot transfer hydroalkylation of nitrobenzene (NB) with EtOH in absence of H2. Interestingly, the catalytic performance could be easily manipulated by tuning the morphology and electronic state of Ni NPs via varying the pyrolysis temperature. It was found that the Ni/NC-650 achieved 100 % nitrobenzene conversion and approx. 90 % selectivity of N,N-diethyl aniline at 240 °C for 5 h, more active than those of homogeneous catalysts or supported Ni catalysts prepared by impregnation (Ni/NC-650-IM, Ni/SiO2). This can be ascribed to the higher dispersion and better reducibility as well as richer surface basicity of the catalyst. More interestingly, the Ni/NC-650 catalyst achieved complete conversion of various nitroarenes, yielding imines, secondary amines, or tertiary amines selectively by simply controlling the reaction temperature at 180, 200 and 240 °C, respectively. The one-pot hydrogen-free process with non-noble metal catalysts, as demonstrated in this work, shows great promise for selective conversion of nitroarenes with ethanol to various anilines at industrial scale, from an economic, environmental, and safety viewpoint.
A quinone-based ionic compound, a method for producing the same, transparent near infrared ray shielding film containing the quinone-based ionic compound and a method for producing the same
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Paragraph 0144-0147, (2020/10/14)
The present invention relates to a quinoid-based ionic compound, a method for preparing the same, and a near-infrared ray-blocking film comprising the quinoid-based ionic compound. According to the present invention, the quinoid-based ionic compound can efficiently block a near-infrared ray due to high transmittance in a visible ray region and high absorbance in a near-infrared ray region, can be easily prepared into a thin film due to high solubility in an organic solvent, and can maintain high heat-resistant and high moisture-resistant properties in a thin film state for a long time due to excellent affinity with a polymer. The near-infrared ray-blocking film containing the quinoid-based ionic compound is suitable for being applied to a protective film for protecting electronic devices, and can be used as an insulating film or a light energy absorbing layer.(AA) Example 1-1(BB) Example 1-2(CC) Comparative Example 1-1COPYRIGHT KIPO 2020
Environmentally benign indole-catalyzed position-selective halogenation of thioarenes and other aromatics
Shi, Yao,Ke, Zhihai,Yeung, Ying-Yeung
supporting information, p. 4448 - 4452 (2018/10/17)
Halogenated aromatic compounds are the cores of many pharmaceutical, agricultural and chemical products but they are commonly prepared using electrophilic halogenation reactions in non-green chlorinated solvents under harsh conditions. A separate problem happens in the aromatic halogenation of thioarenes because they readily undergo oxidative side-reactions. Herein we report an environmentally benign electrophilic bromination of aromatics using an indole-catalytic protocol, which is suitable for a wide range of substrates including thioarenes.
