Lawesson's reagent → HCID 59488854, compound
Reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([NH:15][C:16](=O)[C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[C:19]([N+:24]([O-:26])=[O:25])[CH:18]=2)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:37])=CC=1>O1CCOCC1>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([NH:15][C:16](=[S:37])[C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[C:19]([N+:24]([O-:26])=[O:25])[CH:18]=2)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
N-(4-Benzyloxy-phenyl)-4-chloro-3-nitro-benzamide (19.15 g, 50 mmol), Lawesson reagent (11 g, 27 mmol, commercially available) and dioxane (150 ml) were stirred together and heated under reflux for 4 h. When no more starting amide was present, as showed by TLC, the reaction mixture was cooled and the solvent removed under reduced pressure. The crude product was dissolved in minimum boiling toluene to recrystallise. The purified product was filtered and washed with cold toluene and cold hexane to give the thioamide, in 77% yield.