Synthesis of N-Aryl Hydrazides by Copper-Catalyzed Coupling of Hydrazides with Aryl Iodides.
2010
A convenient method for intermolecular N-arylation of hydrazides with substituted aryl iodides in the presence of a copper catalyst and Cs2CO3 is reported. The C−N coupling of N-Boc hydrazine with para- and meta-substituted aryl iodides afforded the N-arylated products A, regioselectively. A reversal in regioselectivity is observed for the arylation of benzoic hydrazide with ortho-substituted aryl iodides, providing the N‘-arylated products B.
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