1.1
Reagents:
Lithium hydroxide
Solvents:
Methanol
,
Tetrahydrofuran
,
Water
;
2.5 h, rt → reflux; reflux → rt
1.2
Reagents:
Potassium bisulfate
Solvents:
Water
;
pH 1
1.3
Reagents:
Oxalyl chloride
Catalysts:
Dimethylformamide
Solvents:
Dichloromethane
;
90 min, 0 °C
1.4
Reagents:
Diisopropylethylamine
,
O-[(1,1-Dimethylethyl)dimethylsilyl]hydroxylamine
Solvents:
Dichloromethane
;
2 h, 0 °C; 2 h, rt
1.5
Reagents:
Citric acid
Solvents:
Ethyl acetate
,
Water
1.6
Reagents:
Hydrofluoric acid
Solvents:
Chloroform-d
,
Acetonitrile-d3
,
Water
;
4 h, rt
1.7
Reagents:
Citric acid
Solvents:
Ethyl acetate
,
Water

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