Lawesson's reagent → HCID 58423943, compound
Reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:11]3([C:15](=[O:16])[NH:14][C:13](=O)[NH:12]3)[CH2:10][CH:9]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)[O:8][C:5]2=[CH:6][CH:7]=1.COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:33])=CC=1>O1CCOCC1>[Br:1][C:2]1[CH:3]=[C:4]2[C:11]3([C:15](=[O:16])[NH:14][C:13](=[S:33])[NH:12]3)[CH2:10][CH:9]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)[O:8][C:5]2=[CH:6][CH:7]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 110 °C
Procedure
To a solution of 6-bromo-2-phenylspiro[chroman-4,4′-imidazolidine]-2′,5′-dione (440 mg, 1.18 mmol) in 1,4-dioxane (3.6 mL) in a 10 mL CEM microwave test tube was added Lawesson's reagent (477 mg, 1.18 mmol). The resulting mixture was heated in a CEM microwave reactor at 110° C. for 40 min and then cooled to room temperature. The solvent was removed in vacuo, and the residue was purified by flash chromatography to give 6-bromo-2-phenyl-2′-thioxospiro[chroman-4,4′-imidazolidin]-5′-one (238 mg, 52%). MS m/z 389 (M+H+).