1.1
Reagents:
Sulfuric acid
;
22 h, 70 °C; 70 °C → 60 °C
1.2
Reagents:
N-Iodosuccinimide
Solvents:
Methanol
;
60 °C → 70 °C; 2 h, 70 °C; 70 °C → 10 °C
1.3
Reagents:
Sodium sulfite
Solvents:
Water
;
4 h, 40 °C → 10 °C; 12 h, 10 °C

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