Lawesson's reagent → HCID 54285914, compound

Participants

Reaction Steps

Into 100 ml of toluene was dissolved 3.80 g of ethyl 1-(2,4-dichlorophenyl)methyl-1,4-dihydro-2,4-dioxo-3(2H)-quinazolineacetate, and 5.70 g of Lawesson's reagent were added. After refluxed for 7 hours and 30 minutes, 1.90 g of Lawesson's reagent were further added and, after refluxed for 5 hours, solvent was distilled off. To the residue were added 10 ml of ethanol for washing, then it was further recrystallized from ethanol to obtain 2.80 g of title compound. m.p. 138°-139° C.

Provenance & Evidence