1026-05-7Relevant articles and documents
Facile synthesis of 2-methylquinolines from anilines on mesoporous N-doped TiO2 under UV and visible light
Selvam,Swaminathan
, p. 500 - 508 (2013)
Nitrogen-doped TiO2 was synthesized by a simple wet method using a nitrogen precursor hydrazine hydrate and nano TiO2. This photocatalyst was characterized by X-ray diffraction, highresolution transmission electron microscopy, diffused reflectance spectra, photoluminescence, and X-ray photoelectron spectroscopy. XPS analysis indicates the incorporation of anionic nitrogen in TiO2 lattice as O-Ti-N linkage. N2 adsorption-desorpion isotherm indicates the mesoporous nature of N-TiO2 with the surface area 130.0 m2/g. Sizes of N-TiO2 particles are found to be in the range of 5-30 nm by HRTEM images. DRS spectra reveal the extended absorption to the visible range. N-TiO2 is found to be more efficient than Ag-TiO2, Au-TiO2, and Pt-TiO2 in quinaldine synthesis under visible light. Copyright Taylor & Francis Group, LLC.
Radical cation salts induced domino reaction of anilines with enol ethers: Synthesis of 1,2,3,4-tetrahydroquinoline derivatives
Jia, Xiao Dong,Ren, Yan,Huo, Cong Dde,Wang, Wen Juan,Chen, Xiang Ning,Fu, Qiong,Wang, Xi Cun
, p. 671 - 674 (2011)
A domino reaction of anilines with cyclic and acyclic enol ethers induced by catalytic amounts of TBPA?+ (5 mol%) was investigated and a series of 2,4-disubstituted-1,2,3,4-tetrahydroquinolines were synthesized. Different from cyclic enol ethers, when acyclic enol ethers were used in the reaction, they serve as surrogates of acetaldehyde, producing a series of 2-methyl-4-anilino-1,2,3,4-tetrahydroquinolines. A single electron transfer mechanism was proposed to rationalize the products formation.
Sequential Photoredox Catalysis for Cascade Aerobic Decarboxylative Povarov and Oxidative Dehydrogenation Reactions of N-Aryl α-Amino Acids
Shao, Tianju,Yin, Yanli,Lee, Richmond,Zhao, Xiaowei,Chai, Guobi,Jiang, Zhiyong
supporting information, p. 1754 - 1760 (2018/03/21)
A visible-light-driven sequential photoredox catalysis to allow N-aryl α-amino acids to experience efficient cascade aerobic decarboxylative Povarov and oxidative dehydrogenation (ODH) reactions is described. With a dicyanopyrazine-derived chromophore (DP
Method for synthesizing 1,2,3,4-tetrahydroquinoline compounds in mode that decarboxylation of amino acid is catalyzed by visible light
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, (2018/05/30)
The invention relates to a method for synthesizing 1,2,3,4-tetrahydroquinoline compounds in the mode that decarboxylation of amino acid is catalyzed by visible light. The method is characterized in that in an air atmosphere, the N-phenyl amino acidic compounds shown in the formula I, an organic photocatalyst DPZ and 4-molecular sieve are dissolved in an organic solvent, stirred and reacted for atleast 5 hours at the temperature of 20-30 DEG C under the irradiation of the visible light, separation and purification are conducted, and then the tetrahydroquinoline compounds shown in the formula II are obtained, wherein in the formula I and the formula II (the formulas are shown in the description), R is representative for any one of hydrogen, halogen, alkyl, phenyl and alkoxy, R1 is representative for any one of hydrogen, methyl, n-propyl and phenyl, alkyl is representative for methyl or ethyl or normal-butyl or benzyl, and aryl is representative for substituted phenyl or 4-tert-butyl phenyl. According to the method, substrates are simple, reaction conditions are mild, the usage amount of the catalyst is low, the yield is high, and no metal participates in a reaction.