Lawesson's reagent → HCID 86750966, compound

Participants

Reaction Steps

A mixture of 5.6 g (20 mmol) of 1-phenyl-3-(4-methylphenyl)-4, 5-dihydropyrazol-5-one, 6.1 g (15 mmol) of Lawesson's reagent and 50 ml of toluene was heated under reflux for 2 hours. The reaction solution was concentrated, and the residue was purified by silica gel column chromatography (n-hexane/ethyl acetate=10/1 (v/v)) and recrystallized from diethyl ether-n-hexane to give quantitatively 5.9 g of the object compound as pale yellow crystals.

Provenance & Evidence