1.1
Reagents:
Triethylamine
Solvents:
Ethyl acetate
,
Water
;
4 h, 10 - 15 °C
1.2
Reagents:
Hydrochloric acid
Solvents:
Water
;
pH 7.5 - 8, 10 - 15 °C
1.3
Reagents:
Hydrochloric acid
Solvents:
Water
;
pH 1.4 - 1.6, 10 - 15 °C; 1 h, 10 - 15 °C; 15 °C → 5 °C; 1 h, 0 - 5 °C

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