1.1: pyridine; sulfuryl dichloride / dichloromethane / -30 - -20 °C 2.1: perchloric acid / 18 h 3.1: dimethylsulfide borane complex; trimethylsilyl trifluoromethanesulfonate / dichloromethane / 1 h / -30 - -20 °C 3.2: 12 h / 20 °C 3.3: 2 h / 55 - 65 °C 4.1: sodium azide; ammonium chloride / water; ethanol / 8 h / 70 - 75 °C 4.2: 6 h / |Reflux 5.1: sodium azide; ammonium chloride / N,N-dimethyl-formamide / 5 h / 8 - 85 °C 6.1: sodium hydrogencarbonate / water; dichloromethane / 1 h / 20 °C 7.1: hydrogen / ethanol / 18 h / 760.05 Torr View Scheme

1.1: pyridine; sulfuryl dichloride / dichloromethane / -30 - -20 °C 2.1: perchloric acid / 18 h 3.1: dimethylsulfide borane complex; trimethylsilyl trifluoromethanesulfonate / dichloromethane / 1 h / -30 - -20 °C 3.2: 12 h / 20 °C 3.3: 2 h / 55 - 65 °C View Scheme

1.1: pyridine; sulfuryl dichloride / dichloromethane / -30 - -20 °C 2.1: perchloric acid / 18 h 3.1: dimethylsulfide borane complex; trimethylsilyl trifluoromethanesulfonate / dichloromethane / 1 h / -30 - -20 °C 3.2: 12 h / 20 °C 3.3: 2 h / 55 - 65 °C 4.1: sodium azide; ammonium chloride / water; ethanol / 8 h / 70 - 75 °C 4.2: 6 h / |Reflux View Scheme

1.1: pyridine; sulfuryl dichloride / dichloromethane / -30 - -20 °C 2.1: perchloric acid / 18 h 3.1: dimethylsulfide borane complex; trimethylsilyl trifluoromethanesulfonate / dichloromethane / 1 h / -30 - -20 °C 3.2: 12 h / 20 °C 3.3: 2 h / 55 - 65 °C 4.1: sodium azide; ammonium chloride / water; ethanol / 8 h / 70 - 75 °C 4.2: 6 h / |Reflux 5.1: sodium azide; ammonium chloride / N,N-dimethyl-formamide / 5 h / 8 - 85 °C 6.1: sodium hydrogencarbonate / water; dichloromethane / 1 h / 20 °C 7.1: hydrogen / ethanol / 18 h / 760.05 Torr 8.1: phosphoric acid / acetone; ethanol / |Reflux View Scheme

1.1: pyridine; sulfuryl dichloride / dichloromethane / -30 - -20 °C 2.1: perchloric acid / 18 h 3.1: dimethylsulfide borane complex; trimethylsilyl trifluoromethanesulfonate / dichloromethane / 1 h / -30 - -20 °C 3.2: 12 h / 20 °C 3.3: 2 h / 55 - 65 °C 4.1: sodium azide; ammonium chloride / water; ethanol / 8 h / 70 - 75 °C 4.2: 6 h / |Reflux 5.1: sodium azide; ammonium chloride / N,N-dimethyl-formamide / 5 h / 8 - 85 °C 6.1: sodium hydrogencarbonate / water; dichloromethane / 1 h / 20 °C View Scheme