Csp<sup>2</sup>–Csp<sup>2</sup> and Csp<sup>2</sup>–N Bond Formation in a One-Pot Reaction between <i>N</i>-Tosylhydrazones and Bromonitrobenzenes: An Unexpected Cyclization to Substituted Indole Derivatives
A novel, sequential, palladium-catalyzed, cross-coupling reaction using N-tosylhydrazone and bromonitrobenzene derivatives followed by reductive cyclization has been developed. This transformation providing an efficient route to unexpected N-arylindole derivatives involves, in a one-pot reaction, the formation of one Csp2–Csp2 bond and two Csp2–N bonds together with the cleavage of one Csp2–heteroatom