Regioselective Suzuki coupling on pyridinium N-(3,5-dibromoheteroar-2-yl)aminides

Regioselective cross-coupling reaction over 3′,5′-dibromo pyridinium N-(2′-pirazinyl)aminide 1d afforded 3′-aryl-5′-bromo-pyridinium N-(2′-pirazinyl)aminides 3 in good yields as intermediates in the synthesis of isomeric 3′,5′-diaryl pyridinium N-(2′-azinyl)aminides 6.