A New Route for Synthesis of 2‐Substituted‐3‐amino‐5‐phenyl‐7‐N,N‐dimethylamino Phenazinium Chloride Salts

2‐Methyl‐3‐amino‐5‐phenyl‐7‐N , N‐dimethylamino phenazinium chloride salts were synthesized in better yields via the cyclization of 4‐amino‐N ,N‐dimethylaniline with toluidine derivatives and aminobenzene under the oxidation of sodium bicarbonate.