Add time:09/04/2019         Source:sciencedirect.com

Unsymmetrical 3,5-disubstituted pyridylpiperazines were prepared from tribromopyridine in three coupling reactions. Key to the success of the syntheses is the palladium-catalyzed regioselective cross-coupling reaction in the 3-position of N-(3,5-dibromo-2-pyridyl)piperazines.

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