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Relevant academic research and scientific papers

A comparison between Suzuki cross-coupling reaction and direct arylation in the synthesis of new antibacterial imidazo-pyrazines/pyridazines

Two efficient synthetic routes to preparation of 2,3-diarylimidazo[1,2-a]pyrazines and 2,3-diarylimidazo[1,2-b]pyridazines are described. The procedures involve a Suzuki cross-coupling reaction and a palladium-catalyzed direct arylation at position 3 and

SMAD3 INHIBITORS

Smad3 inhibitor compounds, specifically a compound of Formula 1 or Formula 2, or a pharmaceutically acceptable salt thereof, and its use in treating or preventing cell proliferation or cancer in a subject are provided.

General Method for the Preparation of Electron-Deficient Imidazo[1,2-a]pyridines and Related Heterocycles

A new annulation method for the preparation of the imidazo[1,2-a]pyridine ring system under mild conditions is presented. Treatment of a 2-aminopyridine with a dimethylketal tosylate in acetonitrile at elevated temperature (80-140°C) in the presence of catalytic Sc(OTf)3 provides the imidazo[1,2-a]pyridine product in good yield. The annulation method is broadly applicable to electron-poor 2-aminopyridines and displays a complementary profile to the classic preparation of the imidazo[1,2-a]pyridine ring system by reaction of a bromoketone with electron-rich and -neutral substrates. The scope of the process and mechanistic considerations are discussed.

Imidazopyridazines. XV. Synthesis and Anxiolytic Activity of Some 3-(Benzamidomethyl and fluorobenzamidomethyl)-6-(fluoro, chloro and methylthio)-2-(4-tolyl and 3,4-methylenedioxyphenyl)imidazopyridazines

Syntheses are reported for some 3-(benzamido- and fluorobenzamido-methyl)-6-(fluoro, chloro and methylthio)-2-(4-methyl-, 4-t-butyl-, 4-cyclohexyl- and 3,4-methylenedioxy-phenyl)imidazopyridazines from the relevant 3-unsubstituted imidazopyr