4 years ago

Regioselective palladium-catalyzed CH arylation of 4-alkoxy and 4-thioalkyl pyrazoles

Regioselective palladium-catalyzed CH arylation of 4-alkoxy and 4-thioalkyl pyrazoles
A methodology for the palladium-catalyzed regioselective CH arylation of electron rich pyrazoles has been developed. New ligands and mild conditions (70–90 °C) have been identified for this transformation. An intramolecular application of the methodology provided a novel synthetic route for the regioselective synthesis of 1,5-dihydroisochromeno[4,3-c]pyrazoles and 1,5-dihydroisothiochromeno[4,3-c]pyrazoles.

Publisher URL: www.sciencedirect.com/science

DOI: S0040403917313394

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