1.1
Reagents:
Sodium nitrite
,
Hydrochloric acid
Solvents:
Dimethylformamide
,
Water
;
0 °C; 10 min, 0 °C
1.2
Solvents:
Dimethylformamide
;
2 h, 0 °C; 2 h, 50 °C

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