Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction ?

Question

Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction ? (A) 1-butene + HF (B) 2-butanol + H2SO4 (C) Butanoyl chloride + AlCl3 then Zn, HCl (D) Butyl choloride + AlCl3

Tardigrade Admin · Accepted Answer

The Friedal-crafts alkylation reaction will give propyl phenyl ketone which further on Clemmenson’s reduction will give butyl benzene

C_{6} H_{6} + C H_{3} C H_{2} C H_{2} COCl A lC l_{3}

C_{6} H_{5} + COC H_{2} C H_{2} C H_{3} Z n - H g / H Cl (Butyl benzene) C_{6} H_{5} C H_{2} C H_{2} C H_{2} C H_{3}

Q. Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction ?

1-butene + $H F$

2-butanol + $H_{2} S O_{4}$

Butanoyl chloride + $A lC l_{3}$ then $Z n, H Cl$

Butyl choloride + $A lC l_{3}$

Q. Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction ?

1-butene + HF

2-butanol + H2​SO4​

Butanoyl chloride + AlCl3​ then Zn,HCl

Butyl choloride + AlCl3​

The Friedal-crafts alkylation reaction will give propyl phenyl ketone which further on Clemmenson’s reduction will give butyl benzene C6​H6​+CH3​CH2​CH2​COClAlCl3​​ C6​H5​+COCH2​CH2​CH3​Zn−Hg/HCl​(Butyl benzene)C6​H5​CH2​CH2​CH2​CH3​​

1-butene + $H F$

2-butanol + $H_{2} S O_{4}$

Butanoyl chloride + $A lC l_{3}$ then $Z n, H Cl$

Butyl choloride + $A lC l_{3}$