1: 1-bromo-3-(trifluoromethoxy)benzene With n-butyllithium in diethyl ether; hexane T=-75°C; 0.75 h; 2: methyl iodide in diethyl ether; hexane T=-75°C; Further stages.;

triethylsilane; magnesium; trifluoroacetic acid Multistep reaction;

T=650°C; through quartz tube packed with platinum wire;