The C(sp 2 À H)-trifluoromethylation of hydrazones would give access to the α-trifluoromethylated hydrazones that can serve as intermediates in the synthesis of pharmaceutically interesting fluorinated compounds. Herein, we demonstrate the Cu-catalyzed C(sp 2 À H)-trifluoromethylation of the aldehyde hydrazones using the readily available and cost effective Langlois reagent (sodium trifluoromethanesulfinate). This reaction is broadly applicable to a series of aromatic aldehyde N-aminomorpholine hydrazones to give the corresponding C(sp 2 )-trifluoromethyl hydrazones in moderate to high yields. The reaction generally tolerates a series of electron-releasing as well as electronwithdrawing substituents on the aromatic ring.

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