Abstract Treatment of 2, 3, 6, 7-tetramethylphenazine with N-bromosuccinimide under light irradiation afforded in good yield the tetrakis (bromomethyl) derivative. Weakly basic nucleophilic reagents such as thiols, phenols, amines and the azide anion allow the preparation of a variety of functionalized derivatives. Some 2, 7-disubstituted phenazines have also been obtained.
![2,7-bis((2-chloroethyl)thio)phenazine (en)Phenazine, 2,7-bis[(2-chloroethyl)thio]- (en)结构式](https://image.chemsrc.com/caspic/400/132269-78-4.png)