$*)CH_4\rightarrow CH_3Cl$
$*)CH_4\rightarrow C_2H_2\rightarrow C_6H_6\rightarrow C_6H_5-NO_2$$*)C_6H_5NO_2\xrightarrow[Fe]{+Cl_2}m-Cl-C_6H_4-NO_2\xrightarrow[t^o , p]{+CH_3Cl}m-CH_3-C_6H_4-NO_2$
$\overset{[O]}{\rightarrow}m-O_2N-C_6H_4-COOH\xrightarrow[]{+Fe+HCl}m-ClH_3N-C_6H_4-COOH$
$\overset{+NaOH}{\rightarrow}m-H_2N-C_6H_4-COONa$
$*)C_6H_6\xrightarrow[AlCl_3]{+CH_3Cl}C_6H_5CH_3\rightarrow p-CH_3-C_6H_4-NO_2\rightarrow ...$