Abstract
3‐(Hetero)aryl propenals or propenones are efficiently prepared by a Heck reaction of (hetero)aryl bromides and acrolein or vinyl ketones using Beller's CataCXium® Ptb ligand under Jeffery's and Fu's conditions. The formation of these three‐carbon building blocks is embedded into consecutive three‐ and pseudo‐four‐component syntheses of 3‐(hetero)aryl and 3,5‐diarylpyrazoles with a broad substitution pattern in moderate to excellent yield.
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