Which sequence represents the best synthesis of $4-$ isopropylbenzonitrile ?
  • A$1.$ Benzene $+ (CH_3)_2CHCl,AlCl_3;$

    $2.\, Br_2, FeBr_3;$

    $3.\, KCN$

  • B$1.$ Benzene $+ (CH_3)_2CHCl,AlCl_3;$

    $2.\, HNO_3 , H_2SO_4;$

    $3.\, Fe, HCl,;$

    $4.\, NaOH $

    $5.\, NaNO_2, HCl, H_2O$

  • C$1.$ Benzene $+(CH_3)_2CHCl, AlCl_3;$ 

    $2.\, HNO_3 , H_2SO_4;$

    $3.\, Fe, HCl;$

    $4.\, NaNO_2 /HCl $

    $5.\, KCN$

  • D$1.$ Benzene $+ HNO_3 , H_2SO_4;$ 

    $2.\, (CH_3)_2CHCl, AlCl_3;$

    $3.\, Fe, HCl;$

    $4.\, NaNO_2, HCl, H_2O;$ 

    $5.\, CuCN$

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