1: 5-Iodoisatin With sodium hydroxide; water T=20°C; 0.25 h; 2: With sulfuric acid; sodium nitrite in water T=0 - 10°C; 0.5 h; 3: methanol With hydrogenchloride; sodium hydroxide; sulfuric acid; tin(ll) chloride more than 3 stages;
1: 5-Iodoisatin With sodium hydroxide in water T=20°C; 0.25 h; 2: With sulfuric acid; sodium nitrite in water T=0 - 10°C; 0.5 h; 3: methanol With hydrogenchloride; sodium hydroxide; sulfuric acid; tin(ll) chloride more than 3 stages;
