Lawesson's reagent → HCID 86750967, compound

Participants

Reaction Steps

A mixture of 1.2 g (4.5 mmol) of 3-(3-pyridyl)-1-phenyl-4, 5-dihydropyrazol-5-one, 1.4 g (3.4 mmol) of Lawesson's reagent and 10 ml of toluene was heated under reflux for 2 hours. The reaction mixture was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=3/2 (v/v)) and recrystallized from ethanol to give 1.0 g of 3-(3-pyridyl)-1-phenyl-4, 5-dihydropyrazole-5-thione.

Provenance & Evidence