Pd-Catalyzed C–H arylation of pyridazine-based fused 1,2,4-triazoles: overriding selectivity at the usual position by undermining of preferred chelate formation
Palladium(ii) catalyzed regioselective mono-arylation in heterocycles containing multiple Lewis basic N-donor sites. Novelty of the protocol lies in overriding formation of chelation assisted palladacycles.