Although the substrate
scope did not explicate decent chemoselectivity, the results with
hydroxy and amino substituted naphthoquinones 1d and 1e,
respectively, were encouraging while considering the radical
quenching nature of hydroxy and amino groups. To illustrate
the reactivity of differently substituted arylhydrazines, they were
reacted with 2-amino-1,4-naphthoquinones. The reactions went
smoothly, and the results are summarized in Table 2.