water; caesium carbonate in acetone T=0°C; 0.333333 h; Schlenk techniqueInert atmosphere;

silica gel supported zinc chloride T=100°C; Ritter reaction; 6 h; neat (no solvent); chemoselective reaction;

in methanol T=20°C; 24 h;

bismuth trifluoromethanesulphonate; water in nitrobenzene Ritter reaction;

polymer-bound 1-hydroxybenzotriazole-6-sulfonamide; N-ethyl-N,N-diisopropylamine; bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate 1.) DMF, rt, 6 h, 2.) DMF, rt, 20 h; Yield given. Multistep reaction;