Pyridine → HCID 66801667, compound

Participants

Reaction Steps

A suspension of 2-chloro-N-(3,5-difluoropyridin-4-yl)-6-nitrobenzimidoyl chloride (5.53 g, 16.6 mmol), thiourea (5.05 g, 0.066 mol) and pyridine (6.7 mL, 83 mmol) in isopropanol (90 mL), under nitrogen, was heated under reflux for 6 hours. After this time, Et3N (14 mL, 100 mmol) was added over 5 minutes and the reaction mixture was heated under reflux for 18 hours. Upon cooling to room temperature, the volatiles were removed under reduced pressure and the resultant residue was partitioned between water and EtOAc. The aqueous phase was further extracted with EtOAc (×2) and the combined organic layers were dried (Na2SO4) and concentrated to dryness. The resultant residue was purified by column chromatography on silica gel eluting with 0-80% EtOAc in pentane followed by 0-50% EtOAc in DCM to afford the title compound as a yellow solid (2.55 g, 50% yield). LCMS (Method D): RT=3.29 min, m/z: 310 [M+H+].

Provenance & Evidence