Superelectrophilic heterocycles: facile SNAr–SEAr couplings involving very weak carbon nucleophiles

Superelectrophilic halonitro-2,1,3-benzoxadiazoles under-go remarkably facile carbon–carbon couplings with some electron-rich aromatics and heteroaromatics, affording quantitatively products exhibiting an intense visible absorption due to strong intramolecular charge transfer.