67837-41-6

Upstream product

• 634-47-9 2-chloro-4-methylquinoline 
• 104-94-9 4-methoxy-aniline 
• 52562-19-3 2-isopropenylaniline 
• 491-35-0 C₆H₄NCH₂CHCCH₂ 
• 4053-40-1 4-methylquinoline 1-oxide 
• 459-64-3 4-methoxybenzenediazonium tetrafluoroborate 
• 138386-54-6 C₂₇H₂₄NP 
• 5416-93-3 4-Methoxyphenyl isocyanate 
• 607-66-9 4-methylquinolin-2-ol 

Relevant academic research and scientific papers

Catalyst-Free Synthesis of 2-Anilinoquinolines and 3-Hydroxyquinolines via Three-Component Reaction of Quinoline N-Oxides, Aryldiazonium Salts, and Acetonitrile

A rapid microwave-assisted, catalyst-free, three-component synthesis of various 2-anilinoquinolines from quinoline N-oxides and aryldiazonium salts in acetonitrile under microwave irradiation is reported. This reaction utilizes acetonitrile as a single nitrogen source and involves the formation of two new C-N bonds via the formal [3 + 2] cycloaddition reaction. In the case of 2-substituted quinolines, 3-hydroxyquinoline was observed as the main product via a 1,3 shift of the oxygen atom from N-oxide to the C3 position of quinolines.

Cu-catalyzed aerobic oxidative cyclizations of 3-N-hydroxyamino-1,2-propadienes with alcohols, thiols, and amines to form α-O-, S-, and N-substituted 4-methylquinoline derivatives

A one-pot, two-step synthesis of α-O-, S-, and Nsubstituted 4-methylquinoline derivatives through Cu-catalyzed aerobic oxidations of N-hydroxyaminoallenes with alcohols, thiols, and amines is described. This reaction sequence involves an initial oxidation of N-hydroxyaminoallenes with NuH (Nu = OH, OR, NHR, and SR) to form 3-substituted 2-en-1-ones, followed by Bronsted acid catalyzed intramolecular cyclizations of the resulting products. Our mechanistic analysis suggests that the reactions proceed through a radical-type mechanism rather than a typical ni-trone-intermediate route. The utility of this new Cu-catalyzed reaction is shown by its applicability to the synthesis of several 2-amino-4-methylquinoline derivatives, which are known to be key precursors to several bioactive molecules.

Synthesis of dibenzo(b,g)-5-methyl-1,8-naphthyridines

A series of 1,8-naphthyridines have been synthesised. 2-Hydroxy-4-methylquinoline 1 on reaction with PCI5/POCl3 gives 2-chloro-4-methylquinoline 2 which on treatment with substituted anilines yields 2-quinolinamines 3a-e. Cyclisation in situ affords the title compounds 4a-e using phosphorus oxychloride and dimethyl formamide.