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11.
Yalu Ma Xiaofei Ma Yun Tian Xue Qin Hongling Gao Huaji Liu Fanli Lu Xiaodong Wang Xingyao Wang Danfeng Li Jianhui Wang 《大学化学》2020,35(8):48-53
将课程思政应用到"无机化学和化学分析"教学中,更好发挥其价值引领作用。开展课程思政建设,应做到守正与创新。本文以价值引领为切入点,介绍如何将思想政治教育有机融入课程内容设置和课堂讲授等环节,力求培养学生的家国情怀、国际视野、法治意识、生态意识、工程伦理、人文关怀等科学素养,深入践行立德树人,提高本科教学质量。 相似文献
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Olefin‐Directed Palladium‐Catalyzed Regio‐ and Stereoselective Oxidative Arylation of Allenes 下载免费PDF全文
Dr. Can Zhu Bin Yang Dr. Tuo Jiang Prof. Dr. Jan‐E. Bäckvall 《Angewandte Chemie (International ed. in English)》2015,54(31):9066-9069
An olefin‐directed palladium‐catalyzed oxidative regio‐ and stereoselective arylation of allenes to afford 1,3,6‐trienes has been established. A number of functionalized allenes, including 2,3‐ and 3,4‐dienoates and 3,4‐dienol derivatives, have been investigated and found to undergo the olefin‐directed allene arylation. The olefin moiety has been proven to be a crucial element for the arylating transformation. 相似文献
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Rhodium(III)‐Catalyzed Cyclative Capture Approach to Diverse 1‐Aminoindoline Derivatives at Room Temperature 下载免费PDF全文
Dr. Dongbing Zhao Suhelen Vásquez‐Céspedes Prof. Dr. Frank Glorius 《Angewandte Chemie (International ed. in English)》2015,54(5):1657-1661
A RhIII‐catalyzed C–H activation/cyclative capture approach, involving a nucleophilic addition of C(sp3)–Rh species to polarized double bonds is reported. This constitutes the first intermolecular catalytic method to directly access 1‐aminoindolines with a broad substituent scope under mild conditions. 相似文献
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Dr. Hua Zhang Prof. Dr. Shinya Hagihara Prof. Dr. Kenichiro Itami 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(47):16796-16800
The dimethylamino (Me2N) group is arguably the most versatile functional group capable of highly efficient and site‐selective directed aromatic functionalizations at the ortho‐, meta‐, and para‐positions depending on reaction conditions. While the repertoire of Me2N‐directed reactions is growing at a rapid pace, the lack of a general method to transform this group to other functionalities hampers its wider application in organic synthesis. Here we report nickel‐catalyzed C?N borylations of aryl‐ and benzyl‐dimethylamines that permit the conversion of a huge library of largely underutilized Me2N‐containing organic molecules into various functional molecules by taking advantage of the wealth of existing C?B functionalization methods. 相似文献
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Fred U. Nnamdi Dr. Colin Diner Prof. Pier Alexandre Champagne Prof. Michael G. Organ 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(11):3855-3860
Two similar tridentate directing groups derived from glycine and 8-aminoquinoline were shown to enable the palladium-catalyzed anti-Markovnikov hydrofunctionalization of 4-pentenylamine with drastically different efficiencies. A computational investigation into the origin of the reactivity difference between these isomeric, carbonyl-transposed auxiliaries suggests that protonation state, thus charge of the substrate-metal complex prior to nucleopalladation is key. These investigations have culminated in a directing group design that can undergo Pd-catalyzed hydrofunctionalization under relatively mild conditions, as low as room temperature. 相似文献
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Fangyan Liu Biao Wang Prof. Dr. Xiaolong Liu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2021,27(6):1955-1960
Understanding of crystallization mechanisms of molecular sieves is driven by the broad range of usefulness and unique properties they possess. It is still difficult to obtain information related to the crystallization mechanism of molecular sieves, partly because the materials are generally prepared under hydrothermal conditions and the whole reaction happens in the “black box” autoclave. In this work, 2D 1H DQ-SQ NMR results clearly demonstrate that it is not only the electrostatic interactions between organic structure-directing agents (OSDAs) and the framework, but also the correlation among OSDAs playing the dominant structural directing roles during the crystallization process. Our fundamental understanding of the crystallization mechanism of molecular sieves could be of great value to design and synthesize new molecular sieves with desirable structural properties. 相似文献
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ZSM‐5 Zeolite Nanosheets with Improved Catalytic Activity Synthesized Using a New Class of Structure‐Directing Agents 下载免费PDF全文
Rajkumar Kore Dr. Rajendra Srivastava Dr. Biswarup Satpati 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(36):11511-11521
A new series of multiquaternary ammonium structure‐directing agents, based on 1,4‐diazabicyclo[2.2.2]octane, was prepared. ZSM‐5 zeolites with nanosheet morphology (10 nm crystal thickness) were synthesized under hydrothermal conditions using multiquaternary ammonium surfactants as the zeolite structure‐generating agents. Both wide‐angle and small‐angle diffraction patterns were obtained using only a suitable structure‐directing agent under a specific zeolite synthesis composition. A mechanism of zeolite formation is proposed based on the results obtained from various physicochemical characterizations. ZSM‐5 materials were investigated in catalytic reactions requiring medium to strong acidity, which are important for the synthesis of a wide range of industrially important fine and specialty chemicals. The catalytic activity of ZSM‐5 materials was compared with that of the conventional ZSM‐5 and amorphous mesoporous aluminosilicate Al‐MCM‐41. The synthesis strategy of the present investigation using the new series of structure‐directing agents could be extended for the synthesis of other related zeolites or other porous materials in the future. Zeolite with a structural feature as small as the size of a unit cell (5–10 nm) with hierarchically ordered porous structure would be very promising for catalysis. 相似文献
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