1: para-fluoro-meta-chloroaniline With hydrogenchloride; sodium nitrite in water T=-5 - 0°C; 0.5 h; 2: With hydrogenchloride; tin(ll) chloride in water T=0°C; 2 h; 3: 3,4-dichloro-5-hydroxyfuran-2(5H)-one in water T=80 - 90°C;