Scheme 3. Decarboxylative hydrazination of carboxylic acids. Reaction conditions as given in Table 1 (entry 1). Isolated yields, average of at least two independent runs. ^a Reaction performed at 1.0 mmol scale. ^b Degassed CH₃CN was used as a solvent. ^c Degassed DMSO was used as a solvent. ^d Degassed DCM was used.