1.1
Reagents:
Triethylamine
,
Sodium pyrosulfite
Solvents:
Dichloromethane
;
rt → 0 °C; 3 h, 0 °C
1.2
Reagents:
Hydrochloric acid
Solvents:
Water
;
2 h, pH 2.5 - 3, 0 °C → 5 °C


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