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ChemicalBook CAS DataBase List 7-FLUORO INDAZOLE
341-24-2

7-FLUORO INDAZOLE synthesis

3synthesis methods
-

Yield: 41%

Reaction Conditions:

with hydrazine hydrateReflux;

Steps:

4.1.1. General procedure for the synthesis of fluoro-1H-indazoles 2c, 2d
General procedure: The title compounds were obtained by modifying a method described by Lukin et al. [63]. To the properly substituted 2-fluorobenzaldehyde (5 g, 35 mmol) was added hydrazine hydrate (12.9 g, 258 mmol, 12.5 ml). After stirring for 12-48 h (TLC control) at reflux water (20 ml) was added and the resulting mixture was cooled to 5 °C. The precipitate was collected by vacuum filtration. The filtrate was extracted with dichloromethane and the residue after evaporation was combined with the precipitate.

References:

Wasilewska, Aleksandra;Sączewski, Franciszek;Hudson, Alan L.;Ferdousi, Mehnaz;Scheinin, Mika;Laurila, Jonne M.;Rybczyńska, Apolonia;Boblewski, Konrad;Lehmann, Artur [European Journal of Medicinal Chemistry,2014,vol. 87,p. 386 - 397]

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