N-Fluoro derivatives of nitrated pyrazole-containing fused heterocycles
摘要:
N-Fluorination of Na-salts of polynitrated bipyrazoles and pyrazole-based fused heterocycles with fluorine-nitrogen mixture (10% F-2) at -60 to -70 degrees C in MeOH in the presence of NaF occurs regiospecifically at the nitrogen atom most distant from nitro groups.