1.1
Reagents:
Acetic acid
Solvents:
Tetrahydrofuran
,
Water
;
3 h, rt → 80 °C; cooled
1.2
Reagents:
Ammonium hydroxide
;
basified
1.3
Reagents:
Carbon tetrabromide
,
Triphenylphosphine
Solvents:
Acetonitrile
;
2 h, rt
1.4
Reagents:
Sodium hydroxide
Solvents:
Water
;
basified

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