70660-38-7Relevant articles and documents
Zeolite catalyzed hydroarylation of alkenes with aromatic amines under organic ligand-free conditions
Li, Teng,Liu, Shujuan,Shi, Feng,Wang, Hongli,Wang, Xinzhi,Yuan, Hangkong,Zhao, Kang
, p. 18 - 29 (2021/01/12)
The hydroarylation of alkenes with aromatic amines is recognized as the most atom-economical and straightforward approach to obtain functional aromatic amines, which are versatile building blocks in organic synthesis and material chemistry. However, controllable synthesis of single hydroarylation product is still a significant challenge because hydroarylation reaction often delivers four hydroarylation products and hydroamination products are also produced during the reaction. Herein, we report the first example of heterogeneous zeolite catalyzed hydroarylation of styrene and norbornene with aniline derivatives under organic ligand-free conditions. With the USY zeolite as catalyst, a wide scope of alkenes and aromatic amines with various functional groups are smoothly converted into the corresponding products in 48–95% yields with high regioselectivity. Detailed characterizations revealed that Lewis acid can promote Hofmann-Martius rearrangement of hydroamination products toward hydroarylation products, resulting in high selectivity for hydroarylation products. In addition, it could be found that the weak acid sites of zeolite play a key role in forming hydroarylation products. Furthermore, the catalyst can be reused at least 10 times without obvious deactivation. This work may promote the development of heterogeneous catalyst system for alkene hydroarylation.
Cobalt-Catalyzed Hydroarylations and Hydroaminations of Alkenes in Tunable Aryl Alkyl Ionic Liquids
Schroeter, Felix,Lerch, Swantje,Kaliner, Maria,Strassner, Thomas
supporting information, p. 6215 - 6219 (2018/10/05)
Tunable aryl alkyl ionic liquids (TAAILs) are a promising class of imidazolium- or triazolium-based ionic liquids. Contrary to "standard" all-alkyl ionic liquids, these carry an aryl ring together with a linear or branched alkyl chain. Their application i
New nickel(II) diimine complexes bearing phenyl and sec-phenethyl groups: Synthesis, characterization and ethylene polymerization behaviour
Wang, Fuzhou,Yuan, Jianchao,Li, Qingshan,Tanaka, Ryo,Nakayama, Yuushou,Shiono, Takeshi
, p. 477 - 483 (2014/07/07)
A series of nickel(II) catalysts containing phenyl and chiral sec-phenethyl groups, {[(4-R1-2-R2C6H2-Rfnet C)2Nap]NiBr2} (Nap: 1,8-naphthdiyl, R1=Me, R2=Ph (3a); R1=Me, R2=sec-phenethyl (3b); R1=Cl, R2=sec-phenethyl (3c); R1=Me, R 2=Me (3d) were synthesized and characterized. All organic compounds were fully characterized by FT-IR and NMR spectroscopy and elemental analysis. The single crystal for X-ray crystallography was isolated from 3a in CH 2Cl2/n-hexane under air; the crystal structure showed a binuclear complex 3a, in which each nickel atom was six-coordinate. The two nickel atoms together with two bromine atoms form a planar four-membered ring, with a bromine and H2O axial ligands. These complexes, activated by diethylaluminum chloride and chiral nickel pre-catalysts rac-3c, exhibited good activities (up to 2.85×106g PE (mol Ni h bar)-1) for ethylene polymerization, and produced polyethylene products with a high degree of branching (up to 117 branched per 1000 carbons) at high temperature. The type and amount of branches of the polyethylenes obtained were determined by 1H and 13C NMR spectroscopy. Copyright
