1: 4-amino-benzoic acid With hydrogenchloride; sodium nitrite in water T=0 - 5°C; 0.5 h; 2: salicylaldehyde With sodium hydroxide in water T=0 - 5°C; 1 h;

1: 4-amino-benzoic acid With hydrogenchloride; sodium nitrite 0.5 h; ice cooling; 2: 2-methyl-benzyl alcohol With sodium hydroxide T=0°C; 2 h;