A Straightforward Synthesis of Pyrazolines and Pyrazoles: Palladium-Catalyzed Carbonylative Vinylation-Cyclocondensation Reactions of Aryl Halides

[摘要]：A novel consecutive one-pot synthesis of pyrazolines and pyrazoles starting from simple aryl halides, styrenes, carbon monoxide, and hydrazines has been established. Palladium-catalyzed carbonylative vinylation of aryl halides gave the corresponding chalcones, which are trapped in situ by addition of hydrazines.

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