1.1
Reagents:
Sodium nitrite
,
Hydrochloric acid
Solvents:
Water
;
cooled; 1 h, cooled
1.2
Reagents:
Triethylamine
,
Diphenylphosphoryl azide
Solvents:
Dimethylformamide
;
3.5 h, > 5 °C
1.3
Reagents:
Ammonia
Solvents:
Water
;
> 5 °C; 40 min, > 5 °C

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