The azo dye on the right is a bright yellow color. Provide a synthesis for the d

Question

The azo dye on the right is a bright yellow color. Provide a synthesis for the dye starting from benzene as the only source of carbon. You may use any other reagents necessary, and you may use more than one equivalent of benzene. Show the products of each reaction that is part of the synthesis

Explanation / Answer

1)Benzene + H2SO4 --> Benzene sulphonic acid , Benzene sulphonic acid + NaOH ---> Phenol , 2) Beneze + HNO3/H2SO4 --> Nitrobenzene, Nitro benzene + Sn/HCl --> Aniline( amino benzene), Aniline + NaNO2 /HCl ( temp = 5C)---> Benzene diazonium salt , 3) Beneze diazonium salts + phenol ---> required azo dye.

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