Hydrazine hydrate (1:1) → HCID 178509230, compound

Participants

Reaction Steps

A suspension of 38.5 g (245.93 mmol) of 2-chloro-5-fluoronicotinonitrile was initially charged in 1,2-ethanediol (380 ml), and hydrazine hydrate (119.6 ml, 2.459 mol) was then added. The mixture was heated under reflux with stirring for 4 h. The product precipitated on cooling. Water (380 ml) was added to the yellow crystals, and the mixture was subjected to extractive stirring at RT for 10 min. The suspension was then filtered with suction over a frit, and the filter product was washed with water (200 ml) and with −10° C. cold THF (200 ml). The residue was dried under high vacuum over phosphorus pentoxide.

Provenance & Evidence