Which One of the Following Is the Best Synthesis for 3,5-Dibromotoluene

question 13

Multiple Choice

Which one of the following is the best synthesis for 3,5-dibromotoluene?

• A) toluene, Br₂/FeBr₃ excess
• B) 1. p-toluidine, Br₂/ FeBr₃;
• 2) NaNO₂/HCl, < 5°C
• 3) H₃PO₂
• C) 1. Toluene, HNO₃/H₂SO₄
• 2) NH₃
• 3) NaNO₂/HCl, < 5°C
• 4) CuBr
• D) m-dibromobenzene, CH₃Cl/AlCl₃
• E) 1. m-bromotoluene, HNO₃, H₂SO₄
• 2) Fe/HCl
• 3) NaNO₂/HCl, < 5°C
• 4) CuBr

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