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A facile catalytic one‐pot synthesis of N‐acylhydrazones via acceptorless dehydrogenative coupling of readily available alcohols and benzohydrazides (R2CONHNH2) using arene ruthenium (II) complexes has been described. The coupling of alcohols with various benzohydrazides using ruthenium catalysts provide a wide range of N‐acylhydrazones in good to excellent yields (63–93%; 32 examples). The present...