sulfuric acid in N-methyl-acetamide; water

trifluorormethanesulfonic acid in sodium

1: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 2: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 3: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature View Scheme

1: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 2: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 3: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature 4: 74 mg / K2CO3 / acetone / 3 h / Heating View Scheme

1: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 2: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature View Scheme

1: 1.) SnCl2, conc. HCl; 2.) 50percent KOH / 1.) EtOH, r.t., 1 h; 2.) reflux, 1 h 2: 2 mg / NaBH4, PdCl2 / methanol / 1 h / Ambient temperature 3: 393 mg / BBr3 / CH2Cl2 / 2 h / Ambient temperature 4: 74 mg / K2CO3 / acetone / 3 h / Heating 5: 9.0 mg / ethanol / 8 h / Heating View Scheme