3723-13-5Relevant academic research and scientific papers
Reversible Vapochromic Luminescence Accompanied by Planar Half-Chair Conformational Change of a Propeller-Shaped Boron β-Diketiminate Complex
Ito, Shunichiro,Yaegashi, Misao,Tanaka, Kazuo,Chujo, Yoshiki
, p. 9302 - 9312 (2021)
Leakage of volatile organic compounds (VOCs) is one of the most severe industrial problems, because it can cause environmental pollution, global warming, fire, and explosion. Hence, the visualization of leakage is an essential technology to detect it at a
Towards the rational design of ylide-substituted phosphines for gold(i)-catalysis: From inactive to ppm-level catalysis
Handelmann, Jens,Babu, Chatla Naga,Steinert, Henning,Schwarz, Christopher,Scherpf, Thorsten,Kroll, Alexander,Gessner, Viktoria H.
, p. 4329 - 4337 (2021/04/12)
The implementation of gold catalysis into large-scale processes suffers from the fact that most reactions still require high catalyst loadings to achieve efficient catalysis thus making upscaling impractical. Here, we report systematic studies on the impa
Iron-catalysed 1,2-aryl migration of tertiary azides
Wei, Kaijie,Yang, Tonghao,Chen, Qing,Liang, Siyu,Yu, Wei
supporting information, p. 11685 - 11688 (2020/10/19)
1,2-Aryl migration of α,α-diaryl tertiary azides was achieved by using the catalytic system of FeCl2/N-heterocyclic carbene (NHC) SIPr·HCl. The reaction generated aniline products in good yields after one-pot reduction of the migration-resultant imines.
Mono- and diylide-substituted phosphines (YPhos): Impact of the ligand properties on the catalytic activity in gold(i)-catalysed hydroaminations
Schwarz, Christopher,Handelmann, Jens,Baier, Daniel M.,Ouissa, Alina,Gessner, Viktoria H.
, p. 6808 - 6815 (2019/12/03)
Understanding the impact of ligand properties on their performance in catalysis is seminal for future ligand design and catalyst improvement. In this work, the influence of the steric and electronic properties on the efficiency of a series of mono- and di
A silica-supported titanium catalyst for heterogeneous hydroamination and multicomponent coupling reactions
Aldrich, Kelly E.,Odom, Aaron L.
, p. 11352 - 11360 (2019/08/07)
Highly dehydrated silica gel, SiO2700, gave a material with a total surface hydroxyl density of 0.31 ± 0.05 mmol g-1, 0.9 ± 0.1 Si-OH sites per nm2. Treatment of this material with Ti(NMe2)4/sub
Ylide-Functionalized Phosphines: Strong Donor Ligands for Homogeneous Catalysis
Scherpf, Thorsten,Schwarz, Christopher,Scharf, Lennart T.,Zur, Jana-Alina,Helbig, Andreas,Gessner, Viktoria H.
supporting information, p. 12859 - 12864 (2018/09/25)
Phosphines are important ligands in homogenous catalysis and have been crucial for many advances, such as in cross-coupling, hydrofunctionalization, or hydrogenation reactions. Herein we report the synthesis and application of a novel class of phosphines bearing ylide substituents. These phosphines are easily accessible via different synthetic routes from commercially available starting materials. Owing to the extra donation from the ylide group to the phosphorus center the ligands are unusually electron-rich and can thus function as strong electron donors. The donor capacity surpasses that of commonly used phosphines and carbenes and can easily be tuned by changing the substitution pattern at the ylidic carbon atom. The huge potential of ylide-functionalized phosphines in catalysis is demonstrated by their use in gold catalysis. Excellent performance at low catalyst loadings under mild reaction conditions is thus seen in different types of transformations.
Titanium-Catalyzed Hydroamination and Multicomponent Coupling with a Simple Silica-Supported Catalyst
Aldrich, Kelly E.,Odom, Aaron L.
, p. 4341 - 4349 (2019/01/03)
Hydroamination and multicomponent coupling reactions catalyzed by homogeneous Ti(IV) complexes can produce valuable imines, amines, and other nitrogen-containing organic building blocks. Typically catalysts for this transformation are very sensitive to an
Copper-Catalyzed Cascade Cycloamination of α-Csp3-H Bond of N-Aryl Ketimines with Azides: Access to Quinoxalines
Chen, Tengfei,Chen, Xun,Wei, Jun,Lin, Dongen,Xie, Ying,Zeng, Wei
supporting information, p. 2078 - 2081 (2016/06/01)
A copper-catalyzed cycloamination of α-Csp3-H bond of N-aryl ketimines with sodium azide has been developed. This methodology provides an efficient access to quinoxalines and features mild reaction conditions and readily available ketimines with diverse functional group tolerance.
Zirconium complexes stabilized by amine-bridged bis(phenolato) ligands as precatalysts for intermolecular hydroamination reactions
Sun, Qiu,Wang, Yaorong,Yuan, Dan,Yao, Yingming,Shen, Qi
, p. 20352 - 20360 (2015/12/04)
A series of zirconium complexes bearing amine-bridged bis(phenolato) ligands of different steric and electronic properties have been synthesized, and their activities in catalyzing intermolecular hydroamination reactions have been studied and compared. In
Synthesis of 1,2-borazaronaphthalenes from imines by base-promoted borylation of C-H bond
Liu, Xinwang,Wu, Pengbo,Li, Jianfeng,Cui, Chunming
, p. 3737 - 3744 (2015/05/05)
A new route from benzylic imines permits the synthesis of 1,2-borazaronaphthalenes in good yields. The reaction involves formation of the enamidyl dibromoborane, which undergoes base-promoted borylation of the nearby aromatic C-H bond. Electrophilic attack of the boron species onto the benzylic arene is supported by the slow borylation of arenes substituted with electron-withdrawing groups. The resultant boron bromides can be easily substituted with lithium reagents to provide a range of products. The electronic properties of these 1,2-borazaronaphthalene derivatives have been investigated by UV-vis and fluorescence spectroscopy.
