hydrogenchloride; lithium hydroxide in methanol; water

1: 4-amino-benzoic acid With hydrogenchloride; sodium nitrite in water T=5°C; 0.333333 h; 2: thiophene-2-carbaldehyde in water; acetone T=20°C; 48 h;

pyridine; iron(III) chloride 1.) reflux, 0.5 h, 2.) EtOH; Yield given. Multistep reaction;