2-(Ethoxymethylene)propanedinitrile → HCID 57438640, compound

Participants

Reaction Conditions

Reaction Steps

3-Chloro-2-hydrazinylpyridine (CAS 22841-92-5) (19.1 g, 133.03 mmol) was suspended in MeOH (200 mL) under nitrogen at −5° C. 2-(ethoxymethylene)malononitrile (CAS 123-06-8) (16.25 g, 133.03 mmol) was added portionwise and the resulting mixture stirred at ˜0° C. for 2 hours. The reaction mixture was heated to reflux for 2 hours then cooled and evaporated to provide 5-amino-1-(3-chloropyridin-2-yl)-1H-pyrazole-4-carbonitrile (29.2 g). 1H NMR (400 MHz, DMSO-d6) δ 6.87 (2H, s), 7.61 (1H, dd), 7.79 (1H, s), 8.21 (1H, dd), 8.55 (1H, dd), m/z (ESI+) (M+H)+=220; HPLC tR=1.17 min.

Provenance & Evidence