1,2-Bis-Triazenylarenes Enable Vicinal Sandmeyer-Type Reactions.

The introduction of two nucleophiles in vicinal position of arenes via Sandmeyer-type reactions is compromised by the problematic diazotization of ortho-diaminoarenes. Herein, we show that vicinal substitution reactions are facilitated by the use of 1,2-bis-triazenylarenes. Two distinct methodologies for the synthesis of these triazenes are presented.