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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 557134Generated: October 30, 2026

Lawesson's reagent → 6-Methoxy-1-methyl-2-phenyl-1H-quinazolin-4-thione

https://huagongshe.com/reaction/557134

Reaction equation

Participants

RoleNameHCIDCharge
ReactantLawesson's reagentHCID 87949—
Reactant6-Methoxy-1-methyl-2-phenyl-1H-quinazolin-4-oneHCID 66990799—
SolventTolueneHCID 1140—
Product6-Methoxy-1-methyl-2-phenyl-1H-quinazolin-4-thioneHCID 86635531—

Reaction Steps

1.20 g (4.51 mmol) 6-Methoxy-1-methyl-2-phenyl-1H-quinazolin-4-one and 1.82 g (4.50 mmol) Lawesson's reagent (C14H14O2P2S4, Fluka) were dissolved in 20 ml toluene. The reaction mixture was boiled for 3 h. After evaporation the residue was further purified by column chromatography with silica, eluent dichloromethane/acetone 95/5.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08058431B2
Source datasetuspto-grants-2011_11
ORD IDord-48beeb56c3ed4ab79adea2ab5bdbaee4
Source noteuspto-grants-2011_11