1.1
Reagents:
Trifluoroacetic acid
,
1,3-Dibromo-5,5-dimethylhydantoin
,
Water
Solvents:
Acetonitrile
;
12 h, rt
1.2
Reagents:
Sulfuric acid
Solvents:
tert-Butyl methyl ether
,
Water
;
5 min, rt
1.3
Reagents:
Potassium carbonate
;
pH 10, rt
1.4
Reagents:
Sulfuric acid
Solvents:
Water
;
rt → 0 °C; 1 h, 0 °C

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