Pd(II)‐Catalyzed Ligand Controlled Synthesis of Pyrazole‐4‐carboxylates and Benzo[b]thiophene‐3‐carboxylates.
2015
The cyclization-carbonylation of alkynyl hydrazones (I) proceeds readily in the presence of palladous trifluoroacetate in DMSO leading to pyrazole-4-carboxylates (IV) in good to high yields.
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