potassium carbonate; trifluoroacetic acid 1.) CHCl2, reflux, 6 h; 2.) aq. methanol, 20 h; Yield given. Multistep reaction;

Multi-step reaction with 4 steps 1: 1.) trifluoroacetic acid; 2.) K2CO3 / 1.) CHCl2, reflux, 6 h; 2.) aq. methanol, 20 h2: 75 percent / NBS / dimethylformamide / 24 h3: 1.) conc. HCl, aq. NaNO2; 2.) 50percent H3PO3 / 1.) acetic anhydride; 2.) 0 deg C, 1 h4: 1.) BuLi / 1.) ether, 0 deg C; 2.) reflux, 5 h  

With  thionyl chloride; sodium azide; tetrabutylammomium bromide  1.) methylene dichloride; 2.) 0 deg C, 2 h;  Yield given. Multistep reaction;