1.1
Reagents:
Sulfur dichloride
Solvents:
Dichloromethane
;
2 h, 0 °C; 2 h, reflux; reflux → rt
1.2
Reagents:
Water
;
0 °C
2.1
Solvents:
Ethanol
;
10 min, rt
2.2
Reagents:
Lithium iodide
Solvents:
Ethanol
,
Water
;
12 - 24 h, reflux
2.3
Reagents:
Hydrochloric acid
Solvents:
Water
;
< pH 7, rt