31553-11-4Relevant academic research and scientific papers
TRANSITION METAL COMPOUND, CATALYST FOR OLEFIN MULTIMERIZATION AND METHOD FOR PRODUCING OLEFIN MULTIMER
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Paragraph 0205; 0207, (2018/11/22)
PROBLEM TO BE SOLVED: To provide a novel transition metal compound, a catalyst for olefin multimerization containing the compound and having excellent activity and selectivity, and a method for producing an olefin multimer that is performed in the presence of the catalyst for olefin multimerization. SOLUTION: The present invention provides a transition metal compound of general formula (1), a catalyst for olefin polymerization containing the same, and a method for producing an olefin polymer with the catalyst (R1-R6 are a hydrogen atom or the like, M is a transition metal atom in the periodic table group 6, n is a valence of M, X is a halogen atom or the like, Y is an oxygen atom or the like, Z is a hydrocarbon group or the like, Q is an oxygen atom having a substituent, or the like). SELECTED DRAWING: None COPYRIGHT: (C)2019,JPOandINPIT
Preparation of vinyl ethers using a Wittig approach, and their subsequent hydrogenation employing continuous-flow processing
Balti, Monaem,Efrit, Mohamed Lotfi,Leadbeater, Nicholas E.
supporting information, p. 1804 - 1806 (2016/04/05)
A methodology is reported for the preparation of various aromatic-functionalized vinyl ethers using a Wittig approach. The subsequent hydrogenation of the vinyl ether products to their saturated analogs is also performed and is streamlined by employing continuous-flow processing.
Iridium-catalyzed regioselective silylation of aromatic and benzylic C-H bonds directed by a secondary amine
Li, Qian,Driess, Matthias,Hartwig, John F.
supporting information, p. 8471 - 8474 (2014/08/18)
Reported herein is an iridium-catalyzed, regioselective silylation of the aromatic C-H bonds of benzylamines and the benzylic C-H bonds of 2,N-dialkylanilines. In this process, (hydrido)silyl amines, generated in situ by dehydrogenative coupling of benzylamine or aniline with diethylsilane, undergo selective silylation at the C-H bond γ to the amino group. The products of this silylation are suitable for subsequent oxidation, halogenation, and cross-coupling reactions to deliver benzylamine and arylamine derivatives.
Synthesis of 2-(2-Methoxyethyl)- and 2-(2-Thiomethoxyethyl)-aniline and Related Compounds
Siemeling, U.,Tuerk, T.,Hammermeister, U.
, p. 725 - 732 (2007/10/02)
2-(2-Nitrophenyl)-ethanol (2) was methylated with dimethyl sulfate to give 2-(2-methoxyethyl)-1-nitrobenzene (3a) which then was reduced with hydrazine hydrate in the presence of Raney nickel to 2-(2-methoxyethyl)-aniline (1a).Compound 1a can be transformed into the N-monosilylated derivative 4 by lithiation with n-butyllithium and subsequent reaction with chlorotrimethylsilane.Reaction of 2 with p-toluenesulfonyl chloride yields 2-(2-nitrophenyl)-ethyl p-toluenesulfonate (5), which reacts with sodium thiomethoxide to give 2-(2-thiomethoxyethyl)-1-nitrobenzene (3b). 3b was reduced with hydrazine hydrate in the presence of Raney nickel to yield 2-(2-thiomethoxyethyl)-aniline (1b).Ethyl (2-nitrophenyl)-acetate (6) could be dimethylated with methyl iodide in the presence of potassium tert-butoxide and 18-crown-6 to give ethyl 2-methyl-2-(2-nitrophenyl)-propionate (7).Reduction of 7 with lithium borohydride yields 2,3-dihydro-3,3-dimethyl-1H-indole (9) and 2--aniline (10). - Keywords: 2-Functionalized anilines; Hemilabile ligands; Imido ligands
