91538-40-8Relevant academic research and scientific papers
Synthesis method of naphtho[1', 2': 4, 5]imidazo[1, 2-a]pyridine-5, 6-diketone compound
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Paragraph 0109-0114, (2020/07/02)
The invention discloses a synthetic method of a naphtho[1', 2': 4, 5]imidazo[1, 2-a]pyridine-5, 6-diketone compound, which belongs to the technical field of organic chemistry. The synthesis method comprises the following steps: taking 2-aryl imidazo[1, 2-a] pyridine compound and diazonium acetonitrile as raw materials; synthesizing a 3-cyanomethylated imidazo[1, 2-a]pyridine compound 3 in the presence of a catalyst, reacting the compound 3 with an alcohol under the action of an acid to obtain an imidazo [1, 2-a] pyridine-3-acetate compound 4, and finally heating PPA to condense into a ring andsimutanously forms naphtho[1', 2': 4, 5]imidazo[1, 2-a]pyridine-5,6-dione 5. The whole process of the method is carried out in the air, the used catalysts are common catalysts, the method is low in cost and environmentally friendly, the raw materials are easy to obtain, and a new synthesis path is provided for the compounds.
Visible Light-Promoted Photocatalytic C-5 Carboxylation of 8-Aminoquinoline Amides and Sulfonamides via a Single Electron Transfer Pathway
Sen, Chiranjit,Sahoo, Tapan,Singh, Harshvardhan,Suresh, Eringathodi,Ghosh, Subhash Chandra
, p. 9869 - 9896 (2019/08/20)
An efficient photocatalytic method was developed for the remote C5-H bond carboxylation of 8-aminoquinoline amide and sulfonamide derivatives. This methodology uses in situ generated ?CBr3 radical as a carboxylation agent with alcohol and is further extended to a variety of arenes and heteroarenes to synthesize the desired carboxylated product in moderate-to-good yields. The reaction proceeding through a single electron transfer pathway was established by a control experiment, and a butylated hydroxytoluene-trapped aryl radical cation intermediate in high-resolution mass spectrometry was identified.
Aerobic multicomponent tandem synthesis of 3-sulfenylimidazo[1,2-a] pyridines from ketones, 2-aminopyridines, and disulfides
Ge, Wenlei,Zhu, Xun,Wei, Yunyang
supporting information, p. 6015 - 6020 (2013/09/24)
An aerobic CeCl3·7H2O/NaI-catalyzed C-H functionalization reaction was developed for the synthesis of 3-sulfenylimidazo[1,2-a]pyridines from easily available ketones, 2-aminopyridines, and disulfides without DMSO or peroxide as an ox
Studies on Ketene and Its Derivatives. Part 119. . Reactions of Haloketenes with 2-Arylideneaminopyridines
Katagiri, Nobuya,Kato, Tetsuzo,Niwa, Ryuji
, p. 407 - 412 (2007/10/02)
Reactions of haloketenes with 2-arylideneaminopyridines were examined.Reaction of dichloroketene with 2-benzylideneaminopyridines gave 2,2-dichloro-3-phenyl-3-(2-pyridylamino)propanoic acids and 3-chloro-2-phenylpyridopyrimidin-4(4H)-ones.Similar r
