manganese(IV) oxide T=20°C;

1: With diisobutylaluminium hydride in toluene T=-78°C; 1 h; 2: With hydrogenchloride in diethyl ether; water; toluene 3: With sodium hydrogencarbonate in diethyl ether; water; toluene

sulfur in various solvent(s) 2 h; Heating;

1: 73 percent / hydrogen chloride / Heating 2: 80 percent / LAH / diethyl ether / 0.5 h / -78 °C 3: 1.) oxalyl chloride, dimethyl sulfoxide, 2.) triethylamine / 1.) methylene dichloride, -60 deg C, 20 min, 2.) from -60 deg C to RT View Scheme

1: 27 percent / potassium permanganate / H2O / 1.) from RT to 43 deg C, 5 h, 2.) 45 deg C, overnight 2: 73 percent / hydrogen chloride / Heating 3: 80 percent / LAH / diethyl ether / 0.5 h / -78 °C 4: 1.) oxalyl chloride, dimethyl sulfoxide, 2.) triethylamine / 1.) methylene dichloride, -60 deg C, 20 min, 2.) from -60 deg C to RT View Scheme

manganese(IV) oxide; oxygen; urea T=150°C; P=3800.26 Torr; 3 h; Autoclave;

1: 49 percent / NaBH4 / methanol / -78 °C 2: 1.) POCl3, 2.) KOAc / 1.) CH2Cl2, reflux, 40 min, 2.) CH2Cl2, water, reflux, 20 min 3: 71 percent / sulfur / various solvent(s) / 2 h / Heating View Scheme

1: 1.) POCl3, 2.) KOAc / 1.) CH2Cl2, reflux, 40 min, 2.) CH2Cl2, water, reflux, 20 min 2: 71 percent / sulfur / various solvent(s) / 2 h / Heating View Scheme