1.1
Reagents:
Sodium bisulfite
Solvents:
Diethyl ether
,
Water
;
2 h, rt
1.2
2 - 24 h, rt
2.1
Reagents:
Hydrochloric acid
Solvents:
1,4-Dioxane
;
6 h, reflux
2.2
Reagents:
Sodium bicarbonate
Solvents:
Water
;
pH 2